RU2744857C1 - Absorbent product - Google Patents

Abstract

FIELD: chemistry/technology.

SUBSTANCE: invention relates to a nonwoven fabric containing an agent for breaking up a liquid film used for an absorbent article. The nonwoven fabric contains one or more compounds selected from the following compound (C1) and the next compound (C2), and one or more components selected from the following components (D2) and (D3), where (C1) is a compound having a spreading coefficient of 15 mN/m or more and 50 mN/m or less on a liquid having a surface tension of 50 mN/m and a water solubility of 0 g or more and 0.025 g or less; and (C2) a compound having a spreading coefficient greater than 0 mN/m and 50 mN/m or less on a liquid having a surface tension of 50 mN/m, a water solubility of 0 g or more and 0.025 g or less, and an interfacial tension phases greater than 0 mN/m and 20 mN/m or less on a liquid having a surface tension of 50 mN/m; and (D2) a compound having a surface tension of 42 mN/m or more and 60 mN/m or less, consisting of a structure containing a hydrophilic group, wherein the structure containing a hydrophilic group includes a structure containing a polyoxyethylene group or a structure containing a block copolymer of a polyoxyethylene group and a polyoxypropylene group; and (D3) bis-methoxypropylamidoisodocosane or nonwoven fabric contains one or more compounds selected from the following compound (C1) and the following compound (C2-1); and the next component (D1); where component (D1) is soluble in water, and when component (D1) is immersed in water for 20 minutes to prepare a 2.5 wt% aqueous solution of component (D1), the foam height is 10 mm or more and 20 mm or less; (D1) a nonionic surfactant having an HLB value of 10 or more and 20 or less and a melting point of 10°C or more and less than 25 °C; (C2-1) a compound having a spreading coefficient greater than 10 mN/m and 50 mN/m or less on a liquid having a surface tension of 50 mN/m, a water solubility of 0 g or more and 0.025 g or less, and a surface tension at the interface the interface is greater than 0 mN/m and 20 mN/ m or less on a liquid having a surface tension of 50 mN/m and a melting point of -220 °C or more and 40 °C or less.

EFFECT: technical result consists in creating a nonwoven material having improved properties of preventing surface liquid leakage and reducing the amount of residual liquid.

11 cl, 9 tbl, 28 ex, 3 dwg

Description

The technical field to which the invention relates

{0001}

The present invention relates to a nonwoven fabric used for an absorbent article or the like.

State of the art

{0002}

In recent years, proposals have been made to improve the wearing feel, such as dryness, of a nonwoven fabric used in a surface material in contact with skin in an absorbent article or the like. For example, Patent Literature 1 says that a liquid film formed in narrow spaces between fibers of a nonwoven fabric can be split with a liquid film splitting agent to reduce the amount of residual liquid in the nonwoven fabric. Thus, the dryness of the nonwoven fabric can be improved.

Citation List

Patent Literature

{0003}

Patent Literature 1: JP-A-2016-117981 (“JP-A” means Japan's Unexamined Published Patent Application)

The essence of the invention

{0004}

The present invention provides a nonwoven fabric containing an agent for cleaving a liquid film and one or more components selected from the following components (D1), (D2) and (D3).

(D1) Non-ionic surfactant.

(D2) A compound having a surface tension of 42 mN / m or more.

(D3) A compound having a melting point of 40 ° C or more, which is more hydrophilic than a liquid film splitting agent and does not contain hydrophilic groups.

In addition, the present invention provides a nonwoven fabric containing one or more compounds selected from the following compound (C1) and the next compound (C2), and one or more components selected from the following components (D1), (D2) and (D3).

(C1) A compound having a spreading coefficient of 15 mN / m or more on a liquid having a surface tension of 50 mN / m and a water solubility of 0 g or more and 0.025 g or less.

(C2) A compound having a spreading coefficient greater than 0 mN / m on a liquid having a surface tension of 50 mN / m, a water solubility of 0 g or more and 0.025 g or less, and an interfacial tension of 20 mN / m or less by liquid having a surface tension of 50 mN / m.

(D1) Non-ionic surfactant.

(D2) A compound having a surface tension of 42 mN / m or more.

(D3) A compound having a melting point of 40 ° C or more, which is more hydrophilic than compound (C1) and compound (C2) and does not contain hydrophilic groups.

{0005}

In addition, the present invention provides a nonwoven fabric containing an agent for cleaving a liquid film, where the proportion of reduction in surface tension in the following "Method for measuring the proportion of reduction in surface tension of a bodily fluid" is less than 25%.

[Method for measuring the proportion of reduction in the surface tension of a bodily fluid]

(1) Prepare the following test fluid. Its surface tension is measured using the plate method in an environment at a temperature of 25 ° C and at a relative humidity (RH) of 65%.

The liquid for research is prepared by adjusting the mixing ratio corresponding to the viscosity of 8 cP, by mixing the upper layer of the liquid and the lower layer of the liquid,

and both the top layer fluid and the bottom layer fluid are obtained as separate top layer and bottom layer of defibrinated horse blood, respectively, leaving 100 ml of defibrinated horse blood to stand at 22 ° C and 65% humidity for 1 hour.

(2) A sample of nonwoven fabric is prepared, which is coated with components located on the surface of fibers of the target nonwoven fabric, excluding the agent for splitting the liquid film. Determine the number of coating components after identifying the structure and extract the number and proportion of components nonwoven fabric based on this identification. Sample of nonwoven fabric after coating, it is directly adhered to a Petri dish having a diameter of 5 cm × 5 cm, and the liquid for research is repeatedly passed through it, 3 g passes through it during each operation and 15 g in total.

(3) The surface tension of the liquid that is passed through it is measured using the plate method used in procedure (1).

(4) Calculate the percentage of reduction (%) in the surface tension of the test liquid upon passage through the nonwoven fabric in procedure (3) with respect to the surface tension of the research liquid before passing through the nonwoven fabric in procedure (1).

In addition, the present invention provides a nonwoven fabric containing one or more compounds selected from the following compound (C1) and the next compound (C2), where the proportion of reduction in surface tension in the following "Method for measuring the proportion of reduction in surface tension of a bodily fluid" is less 25%.

(C1) A compound having a spreading coefficient of 15 mN / m or more on a liquid having a surface tension of 50 mN / m and a water solubility of 0 g or more and 0.025 g or less.

(C2) A compound having a spreading coefficient greater than 0 mN / m on a liquid having a surface tension of 50 mN / m, a water solubility of 0 g or more and 0.025 g or less, and an interfacial tension of 20 mN / m or less by liquid having a surface tension of 50 mN / m.

[Method for measuring the proportion of reduction in the surface tension of a bodily fluid]

(1) Prepare the following test fluid. Its surface tension is measured using the plate method in an environment at a temperature of 25 ° C and at a relative humidity (RH) of 65%.

The liquid for research is prepared by adjusting the mixing ratio corresponding to the viscosity of 8 cP, by mixing the liquid of the upper layer and the liquid of the lower layer,

and both the top layer fluid and the bottom layer fluid are obtained as separate top layer and bottom layer of defibrinated horse blood, respectively, leaving 100 ml of defibrinated horse blood to stand at 22 ° C and 65% humidity for 1 hour.

(2) A nonwoven sample is prepared to which components other than compound (C1) and compound (C2) are applied from the components located on the surface of the target nonwoven material. Determine the number of coating components, after identifying the structure, extract the number and proportion of components nonwoven fabric based on this identification. The nonwoven sample, after coating, is directly adhered to a Petri dish having a diameter of 5 cm × 5 cm, and the test liquid is repeatedly passed through it, 3 g passes through it during each operation and 15 g in total.

(3) The surface tension of the liquid that is passed through it is measured using the plate method used in procedure (1).

(4) Calculate the percentage of reduction (%) in the surface tension of the test liquid upon passage through the nonwoven fabric in procedure (3) with respect to the surface tension of the research liquid before passing through the nonwoven fabric in procedure (1).

{0006}

Other and additional objects, features and advantages of the present invention will become clearer from the following description, with appropriate reference to the accompanying drawings.

Brief Description of Drawings

{0007}

{Fig. 1}

1 (A) is a cross-sectional view schematically showing a laminated structure in which a mixed layer of a liquid film splitting agent and one or more components selected from components (D1), (D2) and (D3) directly covers the outermost layer (surface) of fibers, and FIG. 1 (B) is a cross-sectional view schematically showing a laminated structure in which an intermediate layer of other components is sandwiched between the mixed layer and the fibers.

{Fig. 2}

Fig. 2 is a partial cross-sectional perspective view, partially enlarged, and schematically shows the nonwoven fabric from the starting materials obtained in Example 1.

Description of embodiments

{0008}

The present invention relates to a nonwoven fabric that can simultaneously realize an improvement in surface leakage prevention properties for bodily fluids and reducing the amount of residual fluid using the agent for splitting the liquid film discussed above.

{0009}

The inventors of the present invention have realized the reduction of the amount of residual liquid in the nonwoven fabric serving as the surface material using the agent for splitting the liquid film described in Patent Literature 1.

In addition, in an absorbent article, a nonwoven fabric that forms a surface material in contact with a skin requires improved surface leakage prevention properties of a bodily fluid as well as a reduction in the amount of residual fluid. The improvement in surface leakage prevention properties results in liquid permeability in the thickness direction of the nonwoven fabric, and contributes to improved liquid leakage prevention properties and liquid absorption properties of an absorbent article. Since the above literature does not report anything regarding the simultaneous implementation in the nonwoven fabric of both improving the surface leakage properties of the bodily fluid and reducing the amount of residual fluid, it leaves room for further improvement.

{0010}

The nonwoven fabric of the present invention can simultaneously realize an improvement in liquid surface leakage prevention properties for a bodily fluid and a reduction in the amount of residual liquid.

{0011}

The nonwoven fabric of the present invention will be described below as its preferred embodiment with reference to the drawings. In addition, the nonwoven fabric of the present invention can be used in various products related to liquid absorption. For example, the nonwoven fabric can be used in the form of a topsheet of an absorbent article such as a sanitary napkin, baby diaper, and adult diaper.

{0012}

The nonwoven fabric in this embodiment contains an agent for cleaving a liquid film and one or more components selected from the following components (D1), (D2) and (D3) (hereinafter referred to simply as “components (D1) - (D3)” ). As the compound having the effect of cleaving the liquid film, one or more compounds selected from the compound (C1) and the compound (C2) described below can be used (hereinafter, collectively referred to as “the agent for cleaving the liquid film” for convenience in listing).

(D1) Non-ionic surfactant.

(D2) A compound having a surface tension of 42 mN / m or more.

(D3) A compound having a melting point of 40 ° C or more, which is more hydrophilic than a liquid film splitting agent and does not contain hydrophilic groups.

{0013}

The agent for cleaving a liquid film of the present invention is an agent having the following “Liquid film elimination properties”. Specifically, an agent for splitting a liquid film means an agent that slows down the formation of a liquid film by splitting a liquid film formed between the fibers or on the surface of the fibers of a nonwoven fabric when a liquid, for example, an excreted liquid (bodily fluid) such as a high viscosity liquid including menstrual blood or urine comes into contact with the nonwoven fabric. The agent for splitting the liquid film has the effect of splitting the formed liquid film and the effect of retarding the formation of the liquid film. The first and second can be referred to as the main action and the secondary action, respectively. For example, an agent for cleaving a liquid film has the same effect as described in paragraphs {0024} and {0025}, in Figures 1 and 2 in WO 2016/098796. As described above, the agent for splitting the liquid film splits the liquid film itself that forms between the fibers or on the surface of the fibers, instead of acting on the liquid, such as reducing the surface tension of the liquid film, to slow down the formation of the liquid film, while removing the liquid film to Facilitate drainage of liquid from the nonwoven fabric.

In addition, all of the components (D1), (D2) and (D3) of the present invention have the function of increasing the wettability of the fibers of the nonwoven fabric and cause difficulties in reducing the surface tension of a bodily fluid that forms a liquid film.

{0014}

Due to the above-described action of the agent for splitting the liquid film, the liquid (body liquid) in contact with the nonwoven fabric easily passes through it without being in very narrow spaces between the fibers or the like, and the reduction of the amount of residual liquid in the nonwoven fabric can be realized at a high level.

On the other hand, due to its high spreadability relative to the liquid film, the liquid film splitting agent has a surface tension less than a conventional hydrophilizing agent or the like used for nonwoven fibers. For this reason, when the agent for cleaving the liquid film is contained in the nonwoven fabric, the wettability of the fibers of the nonwoven fabric is slightly reduced compared to the case of the absence of the agent for cleaving the liquid film and the flow over the surface of the body fluid (for example, menstrual blood or secreted fluid such as urine) increases easily.

In contrast, in this embodiment, the components (D1) to (D3) used in combination with the agent for splitting the liquid film act in the direction of increasing the wettability of the fibers of the nonwoven fabric. Surface leakage of bodily fluids can be effectively suppressed by using them together. In addition, the components (D1) - (D3) enhance the resistance to surface tension reduction in the bodily fluid that forms the liquid film. Thus, in the nonwoven fabric containing the components (D1) to (D3) in combination with the agent for cleaving the liquid film, the spreadability of the agent for cleaving the liquid film on the liquid film is maintained, and the action of cleaving the liquid film can be sufficiently developed. In other words, the nonwoven fabric of this embodiment can effectively prevent surface leakage by appropriately increasing its own wettability while maintaining the effect of reducing the amount of residual liquid with the liquid film splitting agent.

{0015}

The degree of difficulty in reducing the surface tension of a bodily fluid can be confirmed by the proportion of reducing the surface tension of a bodily fluid that passes through the nonwoven fabric, based on the following “Method for measuring the proportion of reducing the surface tension of a bodily fluid”. When the proportion of the decrease in the surface tension of the body fluid obtained by this measurement method is lowered, the surface tension of the body fluid, which may be a liquid film, is rather difficult to decrease.

In the nonwoven fabric of this embodiment, when the reduction ratio is less than 25%, the spreading ratio of the agent for cleaving the liquid film on the bodily liquid is maintained and the action of cleaving the liquid film can be efficiently developed. From this point of view, the percentage of reduction in the surface tension of a bodily fluid obtained by the following “Method for measuring the percentage of reduction in the surface tension of a bodily fluid” is preferably 23% or less, more preferably 17% or less, even more preferably 12% or less, and particularly preferably, it is 0%.

{0016}

(Method for measuring the proportion of reduction in the surface tension of a bodily fluid)

The degree of change in the surface tension of a bodily fluid that passes through the nonwoven fabric, the object of measurement, is measured using the following method. In addition, when the nonwoven fabric, the object of measurement, is an element (for example, a topsheet) collected in an absorbent article such as a sanitary product and a disposable diaper, an adhesive or the like is weakened by cooling means such as a cold spray, and the non-woven fabric is removed and measured. The nonwoven stripper is the same in other dimensions in the description.

(1) In this dimension, the next test fluid is prepared as a solution corresponding to the bodily fluid. Research fluid is a liquid component extracted from defibrinated horse blood (manufactured by NIPPON BIO – TEST LABORATORIES INC.). Specifically, when 100 ml of defibrinated horse blood is left to stand at a temperature of 22 ° C and a humidity of 65% for 1 hour, the defibrinated horse blood is separated into an upper layer and a lower layer, and in the same manner as in section [2] “Amount of residual liquid in a nonwoven sample discussed below, a liquid prepared by adjusting a mixing ratio corresponding to a viscosity of 8 cP by mixing both liquids divided into an upper layer and a lower layer is a test liquid. The upper layer mainly contains the plasma components and the lower layer mainly contains the erythrocyte component. To collect only the top layer from defibrinated horse blood, which separates into the top layer and the bottom layer, you can use, for example, Transfer Pipet (manufactured by Nippon Micro K.K). Its surface tension averages 49 ± 2 mN / m. Surface tension is measured using the plate method in an environment at 25 ° C and 65% relative humidity (RH). In the above case, a platinum plate (99.9% purity, 25 mm wide and 10 mm long) and an automatic surface tension meter “CBVP-Z” (trade name, manufactured by Kyowa Interface Science Co., Ltd.) were used.

(2) A sample of nonwoven fabric is prepared, which is coated with components located on the surface of fibers of the target nonwoven fabric, excluding the agent for splitting the liquid film. Determine the number of components of the coating, after identifying the structure, extract the number and proportion of components from the nonwoven material, based on this identification. The nonwoven sample, after coating, is directly adhered to a Petri dish having a diameter of 5 cm × 5 cm, and the test liquid is repeatedly passed through it, 3 g passes through it during each operation and 15 g in total.

(3) The surface tension of the liquid that is passed through it is measured using the plate method used in procedure (1).

(4) Calculate the percentage of reduction (%) in the surface tension of the test liquid upon passage through the nonwoven fabric in procedure (3) with respect to the surface tension of the research liquid before passing through the nonwoven fabric in procedure (1).

{0017}

(Liquid film elimination properties)

The liquid film splitting agent used in the present invention has properties of eliminating liquid film, and due to such properties, the agent for cleaving the liquid film can develop the effect of eliminating the liquid film when the agent for cleaving the liquid film is applied to a liquid for research, mainly containing a plasma component or artificial urine. Artificial urine is prepared by selecting a mixture having a proportion of 1.940% by weight of urea, 0.795% by weight of sodium chloride, 0.111% by weight of magnesium sulfate, 0.062% by weight of calcium chloride, 0.198% by weight of calcium sulfate, 0.005% by weight of red No. 2 (dye), water ( 96.882 wt%) and polyoxyethylene lauryl ether (0.07 wt%), with respect to surface tension 53 ± 1 mN / m (23 ° C).

The research fluid is the same as the research fluid described above.

The effect of eliminating the liquid film herein includes, with respect to the structure in which air is retained by the liquid film formed from the test liquid or artificial urine, both the effect of inhibiting the formation of the liquid film structure and the effect of eliminating the formed structure, and it can be said that the agent developing at least one action has properties according to which the action of eliminating the liquid film can be developed. Specifically, the level of a certain agent having “liquid film elimination properties” can be judged from a large or small amount of structure, namely a liquid film, when a light structure formation state is formed, in which a structure is formed from a liquid for research or artificial urine, on which agent. That is, a standard is prepared by adjusting the temperature of the test fluid or artificial urine to 25 ° C, and then placing 10 g in a screw cap vial (manufactured by Maruemu Corporation, No. 5, outer diameter: 27 mm, total length: 55 mm). In addition, as a measurement sample, a material prepared by adding 0.01 g of an agent from a measurement object, which was previously adjusted to 25 ° C., to the same liquid as a standard sample, was obtained. After vigorously shaking the standard sample and the sample for up and down measurements twice in the vertical direction of the vial with a screw cap, respectively, the samples are directly placed on the horizontal plane. A liquid layer (bottom layer) without structure and a structured layer (top layer) formed from a large number of structures formed on the liquid layer are formed in a vial with a screw cap after shaking by shaking the samples. After 10 seconds have elapsed from the time immediately after shaking, the structured layer height (the height from the liquid level of the liquid layer to the top surface of the structured layer) is measured for both samples. Then, when the height of the structured layer of the sample to be measured reaches 90% or less with respect to the height of the structured layer of the standard sample, the agent from the measurement object is judged as having the effect of splitting the liquid film.

The agent for cleaving a liquid film used in the present invention is an agent satisfying the properties (an agent that can develop disintegration of a liquid film), through a single compound satisfying the properties, a mixture of a plurality of individual compounds satisfying these properties, or a combination of a plurality connections. That is, an agent for splitting a liquid film means only an agent limited to a material having the effect of splitting a liquid film as defined. Accordingly, when a third component that does not meet the definition is contained in the compound applied to the absorbent article, such an agent is different from an agent for disintegrating a liquid film.

In addition, with respect to the agent for cleaving the liquid film and the third component, “separate compound” means a compound according to the concept of a compound that has the same compositional formula, but has a different molecular weight due to the difference in the number of repeating units.

As an agent for splitting the liquid film, the material can be appropriately selected from those described in paragraphs {0007} to {0186} of WO 2016/098796 and can be used. A preferred embodiment of the liquid film splitting agent will be further described below.

{0018}

In the nonwoven fabric of this embodiment, the expression “containing or having an agent for cleaving a liquid film and one or more components selected from components (D1), (D2) and (D3),” means that the components mainly adhere to the surface fibers. However, insofar as the liquid film splitting agent and components (D1) - (D3) continue to be present on the surface of the fibers, it is also acceptable that the liquid film splitting agent and components (D1) - (D3) are present within the fibers or are present within the fibers through an internal incorporation. As a method for adhering the liquid film splitting agent and components (D1) to (D3) to the fiber surface, various commonly used methods can be adopted without any limitation. Specific examples of these methods include such methods as flexographic printing, inkjet printing, gravure printing, screen printing, spraying and brushing. This treatment can take place after the fibers have been formed into a web by various methods, or after the web has been processed into a nonwoven fabric, or after the nonwoven fabric has been collected into an absorbent article. The liquid film splitting agent and components (D1) to (D3) can be adhered to it separately, or both components can be mixed and adhered to it. When the agent for splitting the liquid film is adhered to the fibers using the adhesion method, a solution prepared by dissolving the agent for splitting the liquid film and components (D1) to (D3) in a solvent, if necessary, can be used, or the application of a liquid in the state of an emulsified liquid can be used. or dispersed liquid. When the application of a liquid containing a solvent is used, the fibers on the surface to which the liquid film splitting agent and components (D1) to (D3) are adhered are dried, for example, with a hot air blower type at a temperature substantially lower than the melting point of the resin. fibers (e.g. 120 ° C or less). However, when the agent for disintegrating the liquid film and the components (D1) to (D3) are in a liquid state in the environment of the production of the nonwoven fabric or absorbent article, such material can be processed without using a solvent. Solvent-free, especially organic solvent-free application of the liquid film splitting agent and components (D1) to (D3) to the fiber surface is preferable in terms of improving production efficiency due to the elimination of the need for measures such as drying treatment and explosion protection. treatment. The agent for splitting the liquid film and the components (D1) - (D3) can each independently be in a liquid state, or in a liquid state and in a state of mixing of both components. The term "liquid state" in this document means that the components have a fluidity suitable for processing by application, including a semi-solid state.

In order for the liquid film splitting agent to have a liquid film splitting effect described below in a nonwoven fabric, the liquid film splitting agent must be present in a fluid state when the liquid film splitting agent comes into contact with a bodily fluid. Due to this, the melting point of the compound contained in the agent for cleaving the liquid film is preferably 40 ° C or less, and more preferably 35 ° C or less. In addition, the melting point of the compound contained in the agent for cleaving the liquid film of the present invention is preferably –220 ° C or more, and more preferably –180 ° C or more.

On the other hand, the components (D1) to (D3) are preferably cured in the nonwoven fabric during use. The term "cured" in this document means that the coated components (D1) - (D3) lose their flow. Thus, the dissolution rate of the components (D1) - (D3) in the bodily fluid in contact with the nonwoven material decreases, during the use of the nonwoven material, this can cause difficulties in reducing the surface tension of the bodily fluid, which forms a liquid film.

{0019}

In addition, the liquid film splitting agent preferably exhibits high spreadability for a liquid droplet by moderately suppressing its viscosity. It is preferable to moderately suppress the viscosity of the liquid film splitting agent. Specifically, the viscosity of the liquid film splitting agent is 0 cP or more; and preferably 6000 cps or less, more preferably 600 cps or less, and even more preferably 200 cps or less. In addition, the unit of viscosity cP is converted according to the equation: 1 cP = 1 × 10 ^–3 Pa · s.

{0020}

(Method for measuring the viscosity of a liquid film splitting agent)

The viscosity of the liquid from the liquid film splitting agent can be measured by the following method.

First, 40 g of a liquid film splitting agent is prepared. The viscosity of the liquid film splitting agent was then measured over an ambient range of 25 ° C and 65% relative humidity (RH) using a Tuning Fork Vibro Viscometer SV-10 (manufactured by A&D Company, Limited). This operation is repeated three times and the average is taken as the viscosity. In addition, when the liquid film splitting agent is a solid product, the liquid film splitting agent is heated to the melting point of the liquid film splitting agent plus 5 ° C to cause a phase transition to the liquid, and measurements are made while maintaining these temperature conditions.

In addition, when the viscosity of the liquid film splitting agent adhered to the fibers is measured, the liquid film splitting agent is removed from the fibers based on the method used in “(Method for measuring the mass ratio of the liquid film splitting agent and components (D1) - ( D3) in the nonwoven fabric and the fraction of each content (OPU) "described below. In this case, when only a small amount can be taken for the above measurement, the viscosity is measured in the same way as in the case of the spreading ratio measurement or the like. as described below.

{0021}

The agent for splitting the liquid film and components (D1) - (D3) can be prepared as an agent for treating fibers by mixing both with a solvent or the like, if necessary, as in the above liquid application. The term “fiber treating agent” as described herein means a material formed in a state in which an oily agent for disintegrating a liquid film having very low water solubility and one or more components selected from components (D1), ( D2) and (D3) are treated so that they can be easily subjected to the coating treatment of nonwoven fabric or fibers from raw materials.

{0022}

In this embodiment, the liquid film splitting agent and components (D1) to (D3) preferably exist as a blended layer on the outermost layer of fibers in order to effectively develop the coupling action. In addition, the term “mixed” in this document means that the agent for cleaving the liquid film and one or more components selected from components (D1), (D2) and (D3) are mixed without performing phase separation to form a layer.

The mixed layer may be a layer composed of a liquid film splitting agent and one or more components selected from components (D1), (D2) and (D3), or may additionally contain other components. In addition, the blended layer can take on various laminated structures since the blended layer is on the outermost fiber layer. For example, as shown in FIG. 1 (A), the mixed layer 5 may have a laminated structure in which the mixed layer 5 directly covers the surface of the fiber 1, or, as shown in FIG. 1 (B), an intermediate layer 7 composed of other components may be located between the mixed layer 5 and the fiber 1. As shown in FIG. 1 (B), if the mixed layer has a structure in which an intermediate layer 7 composed of other components and a mixed layer 5 composed of a liquid splitting agent films and components (D1) - (D3) are laminated on the surface of the fiber 1, it is almost unaffected by other components and the agent for splitting the liquid film is easily brought into contact with the bodily fluid, and for this reason it is further facilitated to satisfy both the effects of splitting the liquid film and reducing the flow of liquid over the surface, and such a case is preferable.

As the “other components” that may be contained in the mixed layer 5 and the intermediate layer 7, various materials can be used within the range in which they do not adversely affect the above-described action. In particular, the other components are preferably an anionic surfactant of the phosphoric acid ester type described below, and more preferably the mixed layer 5 and the intermediate layer 7 contain a potassium alkyl phosphate.

{0023}

In the nonwoven fabric of this embodiment, the weight ratio of the total amount of components (D1), (D2), and (D3) to the total amount of compound (C1), (C2) and (C2-1) (total weight of components (D1), (D2 ) and (D3) / the total weight of compound (C1), (C2) and (C2-1)) is preferably 9 or less, more preferably 4 or less, and even more preferably 2.3 or less, in terms of suppressing the decrease in surface tension. In addition, the mass ratio is preferably 0.25 or more, more preferably 0.43 or more, and even more preferably 0.53 or more, from the viewpoint of effectively suppressing surface leakage of components (D1) to (D3) for bodily fluid. In addition, the term “the total number of components (D1), (D2) and (D3)” in this document means the mass obtained by summing the components contained in the nonwoven fabric from the components (D1), (D2) and (D3 ). For example, if a nonwoven fabric contains one component selected from components (D1), (D2) and (D3), the total amount of one component contained in it is “the total number of components (D1), (D2) and (D3 ) ”. In addition, if the nonwoven fabric contains additional components selected from components (D1), (D2) and (D3), “the total number of components (D1), (D2) and (D3)” is the mass obtained by adding and additional components contained in it. If the nonwoven fabric contains all of the components (D1), (D2) and (D3), “the total number of components (D1), (D2) and (D3)” is the mass obtained by summing all the components contained therein.

The total amount of compound (C1), (C2) and (C2-1) is preferably 0.1 mass% or more, more preferably 0.14 mass% or more, and even more preferably 0.2 mass% or more in in terms of the proportion of the content (sizing) in relation to the mass of the nonwoven fabric, from the point of view of the effective development of the splitting action of the liquid film. In addition, the total amount of compound (C1), (C2) and (C2-1) is preferably 10 mass% or less, more preferably 7.5 mass% or less, and even more preferably 5 mass% or less in terms of the proportion of content (OPU) with respect to the weight of the nonwoven fabric, from the point of view of effectively suppressing leakage on the surface of the liquid, and from the point of view of forming a nonwoven fabric having good texture.

The total amount of components (D1), (D2) and (D3) is preferably 0.06 mass% or more, more preferably 0.1 mass% or more, and even more preferably 0.14 mass% or more in terms of the proportion content (OPU) in relation to the weight of the nonwoven fabric, in terms of effectively suppressing the flow over the surface of the body fluid. In addition, the total amount of components (D1), (D2) and (D3) is preferably 3% by mass or less, more preferably 2.3% by mass or less, and even more preferably 1% by mass or less in terms of the proportion of content (OPU) in relation to the mass of the nonwoven fabric, in terms of preventing a decrease in surface tension.

{0024}

((Method for measuring mass ratio of liquid film splitting agent and components (D1) - (D3) in nonwoven fabric and fraction of each content (OPU))

The weight ratio and fraction of each content (OPU) described above can be measured using, mutatis mutandis, the method described in the {0018} paragraph of WO 2016/098796.

After measuring the mass of the nonwoven sample, use a solvent or carrier such as ethanol or water to extract the liquid film splitting agent, components (D1) - (D3), and other components (adhesive or the like) attached to the surface material ... The mass obtained by adding the liquid film splitting agent, components (D1) to (D3) and other components is calculated from the mass of its residue.

Then, the extract is separated and isolated using liquid chromatography after appropriate selection of measurement conditions such as column and solvent. The agent for splitting the liquid film, components (D1) - (D3) and other components are evaluated at this time by the mass ratio of the isolates.

The weight% of each component is calculated using the weight ratio, the weight of the residue, and the weight of the nonwoven material used for the analysis.

In addition, among the isolates, it is judged whether any isolate corresponds to any substance from the liquid film splitting agent, components (D1) to (D3) and other components after identifying the molecular structure of the substance according to the following measurement method, and obtain the structure as a separate substance corresponding to it, and measuring the physical properties of the structure.

{0025}

(Method for identifying molecular structure)

The molecular weight of the isolate is measured using mass spectrometry (MS) or gel permeation chromatography (GPC).

In addition, the molecular framework is identified using ¹ H-NMR, ¹³ C-NMR or ²⁹ Si-NMR, the functional group belonging to the isolate is identified using IR, and the fractions of the elements are assessed using elemental analysis, and then the molecular structure is identified. through a comprehensive analysis of all the information described above.

{0026}

In the nonwoven fabric of this embodiment, any of the components (D1), (D2) and (D3) used in combination with the agent to disintegrate the liquid film may be selected and contained therein, or two components may be selected and contained therein, or it can contain all three components. In addition, as each of the components (D1), (D2) and (D3), it may contain one or more compounds selected from the following compounds. In any case, the mass ratio and content fraction (OPU) described above are calculated with respect to the total mass of the components (D1), (D2) and (D3) contained therein. In addition to this, the components (D1) - (D3) are a material that has general functional properties, but they differ from each other as substances.

{0027}

Next, the components (D1) to (D3) and the liquid film splitting agent will be described.

{0028}

Component (D1) of the present invention consists of a nonionic surfactant. Examples of the component for increasing the hydrophilicity on the fiber surface of the nonwoven fabric containing the liquid film cleaving agent preferably includes a hydrocarbon-based non-ionic surfactant and a silicone-based non-ionic surfactant containing a hydrophobic group having a hydrophobicity lower than that of a fluorocarbon group. More specifically, examples of the hydrophobic group preferably include a nonionic surfactant having an “alkyl chain or silicone chain excluding a fatty acid polyhydric alcohol backbone”. In addition, examples of the structure of the hydrophilic group in the nonionic surfactant preferably include a polyethylene oxide type, a polyol (polyhydric alcohol) type, a block polymer type, a nitrogen-containing type, and the like.

Examples of the polyethylene oxide-type nonionic surfactant preferably include polyoxyethylene alkyl ether, polyoxyethylene fatty acid ester, and the like.

Examples of the polyol (polyhydric alcohol) type nonionic surfactant preferably include sorbitan monoalkylate, polyoxyethylene sorbitan monoalkylate, glycerol monoalkylate, polyglyceryl monoalkylate, alkyl glucoside, pentaerythritol monoalkylate, and the like.

Examples of the block polymer type nonionic surfactant preferably include polyoxyethylene-polyoxypropylene glycol alkyl ether, polyoxyethylene-polyoxypropylene alkyl ether, and the like.

Examples of the nitrogen-containing nonionic surfactant preferably include polyoxyethylene alkylamine, polyoxyethylene fatty acid alkylamide, and the like.

Among them, it is preferable to have at least a “polyoxyethylene (below, also referred to as“ POE ”) group as a hydrophilic group.

{0029}

Component (D1) independently has water solubility. That is, component (D1) is a surfactant, and its aqueous solution has foaming and foam stability, which is used to assess the solubility in water by the following method. Specifically, the expression “independently has solubility in water” means that when component (D1) is independently immersed in water for 20 minutes to prepare a 2.5 wt% aqueous solution of component (D1), the foam height estimated according to the following measurement is 10 mm or more.

{0030}

(Method for measuring foam height after shaking the aqueous solution of component (D1))

First, 0.2 g of the component (D1) is weighed, poured into a screw cap vial (No. 4, outer diameter: 24 mm, total length: 53 mm, manufactured by Maruem Co., Ltd.), and then poured into it. and 8.0 g of deionized water and then the resulting mixture was allowed to stand for 20 minutes to dissolve the component in the deionized water sufficient to prepare an aqueous solution.

The above method described in “Liquid Film Elimination Properties” is applied mutatis mutandis to measure the height of the structured layer generated by shaking. Specifically, after vigorously shaking the threaded cap vial up and down twice, the threaded cap vial is directly placed on a horizontal plane. After 10 seconds have elapsed from the time immediately after shaking, measure the height of the structured layer (the height from the liquid level of the liquid layer to the top surface of the structured layer in which air is retained) for the solution. This height is taken as the foam height after shaking the aqueous solution of component (D1).

{0031}

Component (D1) preferably contains a compound having an HLB (hydrophilic-lipophilic balance) value higher than the HLB value of the liquid film splitting agent in terms of increasing the hydrophilicity of the fiber surface. The HLB is more preferably 10 or more, even more preferably 11 or more, and particularly preferably 13 or more. In addition, the HLB value is preferably 20 or less, more preferably 17 or less, and even more preferably 15 or less, from the viewpoint of preventing the agent from increasing the solubility in the body fluid. The value of HLB in this range can be obtained by appropriately choosing the total molecular weight by choosing the number of added moles of oxyethylene in the POE chain and the length of the alkyl chain in the non-ionic surfactant.

{0032}

(Method for measuring HLB value of component (D1))

HLB can be determined using the following calculation formula.

Griffin method: HLB value = 20 × total formula weight of hydrophilic moiety / molecular weight

In addition, when the molecular structure of the target component is unknown, the above-described measurement is carried out by obtaining the molecular structure and molecular weight using the same analytical method as in the above “Method for identifying the molecular structure”, and then, if necessary, obtaining the structure as a single substance, as a commercially available product, or by chemical synthesis. The means for identifying the structure and obtaining the structure as a single substance are the same as in the other dimensions in the description.

{0033}

In addition, the nonionic surfactant of the component (D1) preferably has the properties and structure described below from the viewpoint of suppressing the decrease in the surface tension of the bodily fluid. Thus, the spreadability (spreading ratio described below) of the liquid film splitting agent can be kept at the highest possible level. That is, the bodily fluid in contact with the nonwoven fabric of the present embodiment is subjected to splitting of the liquid film until the surface tension decreases, and the formation of the liquid film is slowed down.

{0034}

The non-ionic surfactant of component (D1) is preferably solvent-free during preparation, and is preferably in a liquid state in the component as a separate substance. On the other hand, in the course of using the obtained nonwoven fabric, the non-ionic surfactant preferably has, when the non-ionic surfactant is exposed to a bodily fluid, such properties that the dissolution rate in water decreases due to (i) or (ii), described below: (i) the non-ionic surfactant forms a gel when exposed to a bodily fluid; or (ii) the non-ionic surfactant cures when exposed to a bodily fluid. According to these properties of component (D1), the rate of dissolution in the body fluid decreases, and splitting of the liquid film can be induced to reduce the surface tension of the body fluid. In addition to this, the term “liquid state” means that the non-ionic surfactant has fluidity, while “cured” indicates that fluidity is lost.

With respect to the temperature conditions of the component (D1) when the melting point is 5 ° C or more for an individual substance, the component (D1) is easily cured during storage of the product and can maintain a solid state at least until the wearing time, and for this reason is easily caused a decrease in the rate of dissolution upon exposure to a bodily fluid.

{0035}

The nonionic surfactant component (D1) preferably contains at least one surfactant selected from (D11) and (D12) described below.

(D11) A non-ionic hydrocarbon-based surfactant having a foam height of 10 mm or more after shaking an aqueous solution and containing, as a hydrophilic group, a group consisting of a POE group, or a group containing a POE group and any other polyoxyalkylene group (below , also referred to as “POA”), a polyoxypropylene group (below, also referred to as “POP”), a polyoxybutylene group (below, also referred to as “POB”) or the like) , and containing, as a hydrophobic group, a straight chain or a branched hydrocarbon chain (excluding a fatty acid polyhydric alcohol backbone).

(D12) A non-ionic silicone-based surfactant having a foam height of 10 mm or more after shaking an aqueous solution and containing, as a hydrophilic group, a group consisting of a POE group, or a group containing a POE group and any other POA group ( also referred to as POP group and POB group), and containing a straight-chain or branched silicone chain as a hydrophobic group.

{0036}

In (D11) and (D12), when the hydrophilic group contains a POE group and any other POA group, it is preferable that the amount of added moles of the POE group in the hydrophilic group is the largest (it is preferable that the amount of added moles of oxyethylene is greater than the amount of added moles of any other oxyalkylene).

In addition, it is preferable that in (D11) the conditions according to the following formula are satisfied.

When the number of added moles of oxyethylene in the POE group is taken as n and the molecular weight is taken as X,

44 n / X ≥0.5

(in the formula, “0.5” means “10/20 = 0.5” when HLB 10 is used as a reference).

{0037}

In the nonionic hydrocarbon-based surfactant in (D11), the amount of added moles of oxyethylene in the POE group that forms the hydrophilic group is preferably 5 moles or more, and more preferably 7 moles or more, from the viewpoint of increasing hydrophilicity. In addition, the amount of added moles of oxyethylene in the POE group is preferably 15 moles or less, and more preferably 10 moles or less from the viewpoint of decreasing the dissolution rate in the body fluid. In addition, the hydrocarbon chain that forms the hydrophobic group preferably has an alkyl chain length of about 10 or more and 22 or less carbon atoms. More preferably, the number of carbon atoms is 10 or more, and even more preferably 12 or more, from the viewpoint of decreasing the dissolution rate. Moreover, the number of carbon atoms is more preferably 22 or less, and even more preferably 18 or less, from the viewpoint of ease of liquefaction (D11) during coating.

In addition, in the nonionic silicone-based surfactant in (D12), the amount of added moles of oxyalkyl in the POA group, including the POE group that forms a hydrophilic group, is preferably 30 mol or more. For example, a silicone non-ionic surfactant is preferable in which the silicone-based non-ionic surfactant is POE · POP-modified silicone, the amount of added moles of oxyalkylene in the POA group is 30 mol or more, the silicone non-ionic surfactant contains one or more POE groups and the number of added moles of oxyethylene in the POE group is the largest.

{0038}

In all of the hydrocarbon-based non-ionic surfactant in (D11) and in the silicone-based non-ionic surfactant in (D12), the hydrophobic group has a straight chain structure and the surfactant cures easily compared to the surfactant having a branched structure, and the surface tension of the bodily fluid hardly decreases, and such a case is preferable. More specifically, it is preferred that at least one nonionic surfactant selected from (D11-1), (D11-2), (D12-1) and (D12-2) described below is contained. The term "straight-chain" means that the structure contains no tertiary or more branched carbon atoms in the continuous carbon bond intermediate.

(D11-1) Non-ionic surfactant based on hydrocarbon, which is a straight chain POE alkyl ether containing a POE group as a hydrophilic group, in which the amount of added moles of oxyethylene is 5 moles or more, and containing a straight chain as a hydrophobic group a hydrocarbon chain in which the number of carbon atoms is about 10 or more and 22 or less. Preferably, the number of carbon atoms is 12 or more from the viewpoint of decreasing the dissolution rate. In addition, the number of carbon atoms is preferably 18 or less from the viewpoint of ease of liquefying the surfactant during coating.

(D11-2) A non-ionic hydrocarbon-based surfactant containing, as a hydrophilic group, a copolymer of the POP group and the POE group, in which the number of added moles of oxyethylene in the POE group is 5 mol or more and the number of added moles of oxypropylene in the POP group is 3 mol or less, and containing a straight-chain hydrocarbon chain as a hydrophobic group. The amount of added moles of oxyethylene in the POE group is more preferably 7 moles or more from the viewpoint of increasing hydrophilicity. In addition, the amount of added moles of oxyethylene in the POE group is preferably 15 moles or less, and more preferably 10 moles or less from the viewpoint of reducing the dissolution rate of the bodily fluid.

(D12-1) Silicone-based non-ionic surfactant, which is a side-chain modified silicone containing a POE group in a straight-chain silicone chain.

(D12-2) Non-ionic silicone-based surfactant obtained by side-chain modification of a straight-chain silicone chain, in which the surfactant contains a copolymer as a hydrophilic group, in which the number of added moles of oxyethylene in the POE group and the number of added moles oxypropylene in the POP group is 30 mol or more in total, and the number of added moles of oxyethylene in the POE group is greater than the number of added moles of oxypropylene in the POP group. In general, the amount of added moles in the POE group and POP group is more preferably 40 mol or more from the viewpoint of increasing hydrophilicity. In addition, the total amount of added moles in the POE group and POP group is preferably 100 mol or less, and more preferably 90 mol or less, from the viewpoint of adjusting the viscosity to a level consistent with simple handling in the preparation step.

{0039}

Component (D1) non-ionic surfactant is formed as the structure discussed above and, in particular, is a hydrocarbon-based non-ionic surfactant containing 5 moles or more as the number of added moles of oxyethylene in the POE group, or a surfactant based on silicone, in which the number of added moles of oxyalkylene in the POA group is 30 mol or more and the number of added moles of oxyethylene in the POE group is greater than the number of added moles of oxypropylene in the POP group, while the solubility in water is higher than that of the liquid film splitting agent ... Component (D1) is a surfactant having a solubility in water that is different from the agent for splitting a liquid film, while the aqueous solution has foaming and foam stability, and for this reason, the foam height after shaking the aqueous solution can be brought to 10 mm or more. The foam height of the component (D1) is preferably 20 mm or less, more preferably 18 mm or less, and even more preferably 15 mm or less, from the viewpoint of preferentially suppressing the decrease in the surface tension of the bodily fluid.

{0040}

The compound contained in the nonionic surfactant of the component (D1) has a melting point preferably of 5 ° C or more, more preferably 10 ° C or more, and even more preferably 15 ° C or more, from the viewpoint of decreasing the rate. dissolution in bodily fluid. The melting point is preferably less than 25 ° C, more preferably 24 ° C or less, and even more preferably 22 ° C or less, from the viewpoint of ease of liquefaction of the surfactant during coating. Melting points in this range can be obtained by decreasing the alkyl chain length or by adjusting the added moles of oxyethylene in the POE group in the nonionic surfactant to 12 or less.

{0041}

The nonionic surfactant component (D1) further cures because the melting point is higher and the straight chain molecule has a lower diffusion rate, namely a lower dissolution rate, with the nonionic surfactant preferably having a melting point of 5 ° C or is larger and contains a straight chain hydrocarbon chain or a silicone chain.

{0042}

((Method for measuring the melting point of component (D1))

In the case of a solid product, the resulting sample is placed in a vial, and then the vial is placed in a thermostatted humid chamber where it can be observed from the outside, and the sample is acclimated for about 30 minutes, and then, while the temperature is increased by 1 ° C as temperature conditions, observe the temperature at which the substance melts, and take it as the melting point.

In the case of a liquid, the resulting sample is placed in a vial and then the vial is placed in a thermostatted humid chamber where it can be observed from the outside, the temperature is reduced to -20 ° C and the sample is acclimated for about 30 minutes, and then, while the temperature increase by 1 ° C as the temperature condition, observe the temperature at which the substance melts, and take it as the melting point.

{0043}

The weight average molecular weight of the nonionic surfactant component (D1) is preferably 50 or more, more preferably 100 or more, and even more preferably 200 or more, from the viewpoint of adjusting the conditions for alleviating skin irritation. The weight average molecular weight is preferably 1500 or less, more preferably 1000 or less, and even more preferably 750 or less in order to bring the melting point to a level allowing easy handling of the surfactant during the preparation step. The weight average molecular weight of the nonionic surfactant component (D1) can be measured using liquid separation techniques such as GPC and liquid chromatography-mass spectrometry (LC-MS). In the case of high molecular weight, the weight average molecular weight is preferably measured by GPC, and in the case of low molecular weight, the weight average molecular weight is preferably measured by LC-MS. Column and solvent can be selected appropriately. In addition, if necessary, the compound is identified using the method described in the “Method for identifying the molecular structure” discussed above in the previous paragraph in connection with the measurement of the weight average molecular weight.

{0044}

Specific examples of a material satisfying the preferred melting point range and weight average molecular weight in component (D1) include a hydrocarbon-based non-ionic surfactant having a melting point of 20 ° C or more, containing a POE group as a hydrophilic group, in which the amount of added moles of oxyethylene is 9 mol, and containing a lauryl group as a hydrophobic group.

{0045}

Next, the component (D2) will be described.

{0046}

The component (D2) of the present invention is a compound that has a surface tension of 42 mN / m or more. The surface tension is selected to be higher than the surface tension of the liquid film splitting agent. The component (D2) has a surface tension at which the wettability on the fiber surface can be increased. At the same time, the surface tension of the component (D2) has a value close to the surface tension of 50 mN / m, which is considered the surface tension of the body fluid that forms the liquid film, and therefore, even if the component (D2) dissolves in the body fluid, a decrease the surface tension of the bodily fluid can be suppressed. Thus, the spreadability (spreading ratio described below) of the liquid film splitting agent can be kept at the highest possible level. From this point of view, the component (D2) has a surface tension of 42.5 mN / m or more, and more preferably 43 mN / m or more. In addition, the component (D2) has a surface tension of 60 mN / m or less, more preferably 55 mN / m or less, and even more preferably 50 mN / m or less, from the viewpoint of developing hydrophilicity.

{0047}

((Method of measuring component surface tension (D2),)

The surface tension of the component (D2) is measured using the plate method at an ambient temperature of 25 ° C and a relative humidity (RH) of 65%. In the above case, a platinum plate (99.9% purity, 25 mm width and 10 mm length) and an automatic surface tension meter “CBVP-Z” (trade name, manufactured by Kyowa Interface Science Co., Ltd.) were used.

{0048}

Component (D2) is preferably a compound composed of a structure containing a hydrophilic group without a hydrophobic structure to form a material having the above-described surface tension. A structure containing a hydrophilic group is formed from a structure containing a POE group or a structure containing a block copolymer of a POE group and a POP group. The expression “no hydrophobic structure” means a structure without an alkyl chain containing 5 or more carbon atoms, a silicone chain or a fluoride chain.

The compound of component (D2) is preferably polyethylene glycol (PEG) consisting of a POE group or a copolymer of a POE compound and a POP compound, and more preferably polyethylene glycol or polypropylene glycol or a copolymer thereof.

{0049}

The weight average molecular weight of the component (D2) is preferably 200 or more, more preferably 300 or more, and even more preferably 400 or more, from the viewpoint of suppressing volatility. The weight average molecular weight is preferably 10,000 or less, more preferably 8,000 or less, and even more preferably 6,000 or less from the viewpoint of adjusting the viscosity to a level allowing easy coating.

In addition, when component (D2) is a copolymer of a POE compound and a POP compound, the polymerization ratio of POP compound to POE compound (POP polymerization degree / POE degree of polymerization) is preferably greater than 0, more preferably 5 or more, and even more preferably 6.5 or more in terms of suppressing the rate of dissolution in the body fluid. The polymerization ratio is preferably 10 or less, more preferably 8 or less, and even more preferably 7 or less in terms of a weight ratio in terms of increasing hydrophilicity.

{0050}

Component (D2) is more preferably polyethylene glycol having a weight average molecular weight of 400 or a compound prepared by polymerizing polyethylene glycol and polypropylene glycol in a ratio of about 1: 7 in terms of weight ratio.

{0051}

Next, the component (D3) will be described.

{0052}

The compound contained in the component (D3) of the present invention has a melting point of 40 ° C or more, and is more hydrophilic than a liquid film disintegrant. Thus, the compound does not melt even at body temperature, becomes almost insoluble in body fluids, and can improve the wettability on the fiber surface. The expression "more hydrophilic than the agent for cleaving a liquid film" in this document means that the value of "inorganic number / organic number" (inorganic-organic balance value, hereinafter referred to as the IOB value), which is the ratio of the inorganic number to the organic number of the substance is greater than the IOB of the liquid film splitting agent. Thus, component (D3) is formed as a material having properties according to which liquid flow properties can be improved when mixed with and applied to a liquid film splitting agent. In addition, the IOB value is known to have an approximate correlation “HLB = IOB × 10”.

The IOB can be calculated using the method described in paragraphs {0031} - {0036} JP – A – 2016–107100, based on the inorganic number and organic number described in Tables 1–3 below.

{0053}

Table 1 Table of inorganic groups

Inorganic group Number Inorganic number Light metal 500 < Heavy metal, amine and NH _{4 salt} 400 < –AsO ₃ H ₂ ,> AsO ₂ H 300 –SO ₂ –NH – CO–, –N = N – NH ₂ 260 ≡N ⁺ –OH, –SO ₃ H, –NHSO ₂ –NH 250 –CO – NHCO – NHCO– 250 ≡S – OH, –CONH – CONH–, –SO ₂ NH– 240 –CS – NH–, –CONH – CO– 230 = N – OH, –NHCONH– 220 = N – NH–, –CONH – NH ₂ 210 –CONH– 200 ≡N → O 170 –COOH 150 Lactone cyclization 120 –CO – O – CO– 110 Anthracene core, phenanthrene core 105 –OH one hundred > Hg (organic bond) 95 –NH – NH–, –O – CO – O– 80 –N <, (–NH ₂ , –NHF, –NHF ₂ ) amine 70 > CO 65 –COOF, naphthalene core, quinoline core 60 > C = NH fifty –O – O– 40 –N = N– thirty –O– 20 Benzene ring (common aromatic monocycle), pyridine ring 15 Ring (common non-aromatic unicycle, regardless of angle) ten Triple bond 3 Double bond 2 - (OCH ₂ CH ₂ ) -, sugar ring –O–, however (normal temperature) 75 in case of cloud point or less (or more) (20)

Note 1) R is alkyl, Φ is alkyl, phenyl or the like.

Note 2) Carbon in the inorganic number is added to the organic number. Carbon in organic and inorganic numbers is already added to the organic number in organic and inorganic numbers.

Note 3) To the quinoline nucleus or pyridine nucleus = N–: add 70.

Note 4) Organic number (OV) = “Cn × 20” + “organic number in organic and inorganic numbers” + “branched”

Inorganic number (IV) = "inorganic number" + "inorganic number in organic and inorganic numbers"

Table 1 (continued) Table of inorganic groups

Organic and inorganic group Number Organic Inorganic R ₄ Bi – OH 80 250 R ₄ Sb – OH 60 250 R ₄ As – OH 40 250 R ₄ P – OH 20 250 –O – SO ₃ H 20 220 > SO ₂ 40 170 > SO 40 140 –CSSH one hundred 80 –SCN 90 80 –CSOH, –COSH 80 80 –NCS 90 75 –Bi < 80 70 –NO ₂ 70 70 –Sb < 60 70 –As <, –CN 40 70 –P < 20 70 –CSSF 130 fifty –CSOФ, –COSФ 80 fifty –NO fifty fifty –O – NO ₂ 60 40 –NC 40 40 –Sb = Sb– 90 thirty –As = As– 60 thirty –P = P–, –NCO– thirty thirty –O – NO, –SH, –S– 40 20 –I 80 ten –Br 60 ten = S fifty ten –Cl 40 ten –F five five Branch iso> - -ten 0 Branch tert -> - -20 0

Note 1) R is alkyl, Φ is alkyl, phenyl or the like.

Note 2) Carbon in the inorganic number is added to the organic number. Carbon in organic and inorganic numbers is already added to the organic number in organic and inorganic numbers.

Note 3) To the quinoline nucleus or pyridine nucleus = N–: add 70.

Note 4) Organic number (OV) = “Cn × 20” + “organic number in organic and inorganic numbers” + “branched”

Inorganic number (IV) = "inorganic number" + "inorganic number in organic and inorganic numbers"

{0054}

Table 2 Preliminary notes on the use of the "Inorganic group tables"

[A] Auxiliary Notes "Inorganic Group Tables" and Special Group Values Abbreviations Number one Positional isomerism and stereoisomerism have the same magnitude. (Even though isomerism can be as different as liquid form or solid form, the boiling point is approximated). Same values 2

iso-branch

> - Organic -10: 3 tert-branch

-> - Organic –20: four Aroma ring, aroma ring (Short ring: 15,
for the top or bottom of the conjugated aromatic ring add 15)

Inorganic: 15: 30 five Non-aromatic ring (at any angle: 10, in the case of H– in the part of the conjugated ring: 10, if this part contains a substituent, no addition. Then, even if there are two substituents on the same carbon in the ring, such a case is not considered as iso).

Inorganic: 10: 20: 10 6 Heterocyclic ring (ring at any angle: 10, as well as in conjugated parts (4) and (5). A ring having a strong aromaticity: 15, but only in the Table of inorganic groups).

Inorganic: 10

Table 2 (continued) Preliminary notes on the use of the "Inorganic group tables"

[A] Auxiliary Notes "Inorganic Group Tables" and Special Group Values Abbreviations Number 7 Directly oxidized form of the “quinone” aromatic ring (considered “oxide” –O–: 20,). –O– or
Q Inorganic: 20 8 Common ether bond (–O–: 20) (–O– in a furan ring or pyran ring conjugated to a ring is also thought to have 20) –O– Inorganic: 20 9

A special ether (Oxygen atom - (OCH ₂ CH ₂ ) - is believed to have a number between 75 and 20 around normal temperature or cloud point or less, which is reversible at or above cloud point or high temperature).

> O Inorganic: 75

Table 2 (continued) Preliminary notes on the use of the "Inorganic group tables"

[A] Auxiliary Notes "Inorganic Group Tables" and Special Group Values Abbreviations Number ten A simple ether with a sugar ring (oxygen bridge in furanose type, pyranose type and polysaccharide is believed to also have 75, Oxygen bridge specifically means ether oxygen (glycosidic bond) in the acetal structure, bridging sugar to sugar, in polysaccharide or what - or the like). > O Inorganic: 75 eleven

Amine salt, quaternary ammonium salt

12 The primary, secondary or tertiary amine is considered to have 70, however in the case of a ring-forming tertiary amine double bond, the number 2 is not added. (However, one must be careful about> C = NH: 50 in the table)

{0055}

Table 3 Preliminary notes on the use of the "Inorganic group tables"

[B] Group other than in the "Table of inorganic groups" Abbreviations Number one Complex sulphate ester - OSO ₃ H 20: 220 C ₁₂ H ₂₅ OSO ₃ Na 260: 720 –OSO ₃ H Organic: inorganic 20: 220 2

(Si, как считается, примерно равен C, для которого органическое число, как считается, равно 20. Временное значение, таким образом, близко к 15 от нескольких рядов кремния в том же семействе Периодической таблицы IV–C.)

Organosilicon compound 20:

(Si is believed to be roughly equal to C, for which the organic number is believed to be 20. The temporal value is thus close to 15 from several rows of silicon in the same family of Periodic Table IV – C.)

Organic 20:

Table 3 (continued) Preliminary notes on the use of the "Inorganic group tables"

[B] Group other than in the "Table of inorganic groups" Abbreviations Number 3

-> P = O (or -> P -> O) is considered to have 80 and the value is added as follows.

Inorganic: 80

{0056}

The IOB of the compound contained in the component (D3) is preferably 0.7 or more and 0.9 or less. The IOB is preferably 0.9 or less, and more preferably 0.85 or less, from the viewpoint of suppressing the water solubility of the component (D3) for suppressing the decrease in the surface tension of the bodily fluid. In addition, the IOB is preferably 0.7 or more, and more preferably 0.75 or more, from the viewpoint of providing component (D3) with the function of a wetting agent for hydrophilizing a hard surface. Specifically, more preferably, the IOB is 0.7 or more and 0.9 or less, and even more preferably 0.75 or more and 0.85 or less.

On the other hand, when the compound contained in the agent for cleaving the liquid film is compound (C1), the IOB value of compound (C1) is preferably 0.3 or more, more preferably 0.45 or more, and even more preferably 0.55 or more in terms of reducing the interfacial tension to develop high flowability on a liquid, and is preferably 0.8 or less, more preferably 0.7 or less, and even more preferably 0.65 or less in terms of maintaining water insolubility. Specifically, when the compound contained in the agent for cleaving the liquid film is compound (C1), the IOB of compound (C1) is preferably 0.3 or more and 0.8 or less, more preferably 0.45 or more and 0 , 7 or less, and even more preferably 0.55 or more and 0.65 or less. Then, when the compound contained in the agent for cleaving the liquid film is compound (C2), the IOB value of compound (C2) is preferably 0 or more, more preferably 0.05 or more, and even more preferably 0.1 or more, from the point of view of reducing the surface tension at the interface for the development of high flowability in liquid, and preferably 0.6 or less, more preferably 0.5 or less, and even more preferably 0.4 or less, from the point of in terms of maintaining insolubility in water. Specifically, when the compound contained in the agent for cleaving the liquid film is compound (C2), the IOB value of compound (C2) is preferably 0 or more and 0.6 or less, more preferably 0.05 or more and 0.5 or less, and even more preferably 0.1 or more and 0.4 or less.

{0057}

The melting point of the compound contained in the component (D3) is 40 ° C or more (this is the temperature at which the compound does not melt even at body temperature), preferably 50 ° C or more, and more preferably 60 ° C or more. in terms of causing difficulty in melting the compound, even if the compound is exposed to a bodily fluid. The melting point is preferably 120 ° C or less, more preferably 110 ° C or less, and even more preferably 100 ° C or less, from the viewpoint of coating the compound while maintaining temperature control. Melting points in this range can be obtained by forming component (D3) as a hydrocarbon compound containing two or more amide groups in the molecule. That is, component (D3) preferably contains a diamide compound having a melting point of 40 ° C or more.

{0058}

In addition, the compound contained in the component (D3) does not contain hydrophilic groups. That is, the compound consists of a structure containing a hydrophobic group. The term “hydrophilic group” as used herein means a POE group, an anionic group such as sodium sulfonate and potassium phosphate, or a cationic group such as a quaternary ammonium salt. In addition, the expression “consists of a structure containing a hydrophobic group” means that the compound consists of an alkyl chain. Thus, component (D2) has low water solubility. Specifically, the water solubility of the compound contained in the component (D3) is 0.01 g or less, preferably 0.001 g or less, and more preferably less than 0.0001 g.

Component (D3) does not contain hydrophilic groups, while the rate of dissolution in the body fluid is suppressed, and the surface tension of the body fluid hardly decreases. Thus, component (D3) can keep the spreadability (spreading ratio discussed below) of the liquid film splitting agent at the highest possible level. That is, the bodily fluid in contact with the nonwoven fabric of this embodiment is subjected to splitting of the liquid film until the surface tension decreases, and the formation of the liquid film is slowed down.

{0059}

The weight average molecular weight of the compound contained in the component (D3) is preferably 200 or more, more preferably 300 or more, and even more preferably 400 or more from the viewpoint of suppressing volatility. The weight average molecular weight is preferably 5000 or less, more preferably 4000 or less, and even more preferably 3000 or less from the viewpoint of adjusting the viscosity to a level corresponding to simple coating.

{0060}

Component (D3) is more hydrophilic than the agent for cleaving the liquid film, and preferably contains a chain hydrocarbon compound containing no hydrophilic groups, and in this hydrocarbon compound, component (D3) contains two or more amide groups, in total, in the molecule in the intermediate the product or near the end of a continuous hydrocarbon chain, while the compound (D3) may be more hydrophilic than the agent for cleaving the liquid film, and the melting point can be increased.

Component (D3) more preferably contains a diamide compound such as N''N-bis (3-methoxypropyl) isodoco acid diamide.

{0061}

Next, a preferred aspect of the agent for cleaving a liquid film of the present invention will be described. A preferred aspect of the agent for cleaving the liquid film may include the agent described in paragraphs {0013} to {0088} of WO 2016/098796. Specifically, the present invention may include the agents of the first aspect and the second aspect described below.

{0062}

In the compound contained in the agent for disintegrating the liquid film of the first aspect, the spreading coefficient on the liquid having the surface tension of 50 mN / m is 15 mN / m or more, and the solubility in water is 0 g or more and 0.025 g or less. In addition, a compound having such properties is referred to as compound (C1) in several cases.

In the compound contained for splitting the liquid film of the second aspect, the spreading coefficient on the liquid having a surface tension of 50 mN / m is greater than 0 mN / m, namely, has a positive value, the solubility in water is 0 g or more and 0.025 g or less and the surface tension at the interface with the liquid having a surface tension of 50 mN / m is 20 mN / m or less. In addition, a compound having such properties is referred to as compound (C2) in several cases.

{0063}

Determinations of the “spreading coefficient on a liquid having a surface tension of 50 mN / m” and “water solubility” of a compound contained in an agent for cleaving a liquid film as indicated in the first aspect and the second aspect, and methods for measuring the surface tension (γ _w ) of a liquid film (liquid having a surface tension of 50 mN / m), the surface tension (γ _o ) of the agent for splitting the liquid film, the surface tension at the interface (γ _wo ) between the liquid film and the agent for splitting the liquid film, and the water solubility of the agent for splitting the liquid film are as described in paragraphs {0015} to {0022} of WO 2016/098796, where the values are determined based on the following Expression (1) in the range of an ambient temperature of 25 ° C and a relative humidity (RH) of 65%. In addition, the liquid film in Expression (1) means the liquid phase of a “liquid having a surface tension of 50 mN / m”, including both a liquid in a state in which a film is formed between fibers or on the surface of fibers, and a liquid in a state up to forming a film, which is also referred to simply as liquid. In addition, the surface tension in Expression (1) means the surface tension at the interface, the liquid film and the agent for splitting the liquid film, respectively, with respect to the gas phase, and differs from the surface tension at the interface between the phases of the agent for splitting the liquid film and liquid film. This same rule for determining the difference also applies to other descriptions in the present description.

S = γ _w - γ _o - γ _wo (1)

γ _w : surface tension of the liquid film (liquid).

γ _o : surface tension of the liquid film splitting agent.

γ _wo : interfacial tension of the liquid film splitting agent and liquid film.

{0064}

In the compound contained in the liquid film splitting agent of the first aspect, the spreading ratio is 15 mN / m or more, and the liquid film splitting agent has high mobility on the surface of the liquid film formed in the narrow region of the space between the fibers, namely, high diffusion coefficient. In addition, the agent for splitting the liquid film also has spreadability, moving from the position of the fibers constituting the nonwoven fabric to other regions. From the viewpoint of effectively demonstrating this spreadability described above, the spreading ratio of the compound contained in the agent for breaking the liquid film is preferably 20 mN / m or more, more preferably 25 mN / m or more, and even more preferably 30 mN / m or more. On the other hand, its upper limit is not limited in any way, but according to Expression (1) described above, the surface tension of the liquid that forms the liquid film serves as the upper limit of the spreading coefficient of the agent for splitting the liquid film, so that the value of the upper limit is 50 mN / m when a liquid having a surface tension of 50 mN / m is used, the upper limit value is 60 mN / m when a liquid having a surface tension of 60 mN / m is used, and the upper limit value is 70 mN / m when a liquid is used having a surface tension of 70 mN / m. Therefore, from the viewpoint of using the liquid having a surface tension of 50 mN / m according to the present invention, the upper limit is 50 mN / m or less.

{0065}

In addition, in the liquid film disintegrating agent of the first aspect, when the water solubility of the compound contained in the liquid film disintegrating agent is 0 g or more and 0.025 g or less, the liquid film disintegrating agent hardly dissolves and forms an interface with a liquid film to make the diffusion coefficient described above more effective. From the same point of view, the water solubility of the compound contained in the agent for cleaving the liquid film is preferably 0.0025 g or less, more preferably 0.0017 g or less, and even more preferably less than 0.0001 g. In addition, the solubility in water is preferably less and is 0 g or more, and from the point of view of the diffusion coefficient on a liquid film, the solubility in water is practically brought to 1.0 × 10 ^-9 g or more. In addition to this, water solubility is considered to also apply to menstrual blood, urine, or the like that contains water as the main component.

{0066}

In addition, the agent for disintegrating the liquid film of the first aspect preferably comprises a compound having an interfacial tension of 20 mN / m or less with respect to a liquid having a surface tension of 50 mN / m. This means that the “interfacial tension (γ _wo ) of the agent for splitting the liquid film relative to the liquid film” being one of the variables for determining the value of the spreading coefficient (S) in Expression (1) discussed above is preferably 20 mN / m or less. The spreading ratio of the liquid film splitting agent is improved by suppressing the “surface tension at the interface (γ _wo ) of the liquid film splitting agent with respect to the liquid film” and the liquid film splitting agent is easily moved from the fiber surface to a position near the center of the liquid film. and the above action becomes clearer. From this point of view, the “interfacial tension with a liquid having a surface tension of 50 mN / m” of the compound contained in the agent for cleaving the liquid film is more preferably 17 mN / m or less, even more preferably 13 mN / m or less, even more preferably 10 mN / m or less, particularly preferably 9 mN / m or less, and particularly preferably 1 mN / m or less. On the other hand, its lower limit is not in any way limited and it is only necessary that it be more than 0 mN / m, from the point of view of insolubility in a liquid film. In addition, if the interfacial tension is 0 mN / m, that is, if the liquid film splitting agent is soluble, the interface between the liquid film and the liquid film splitting agent cannot be formed, and therefore Expression (1) does not take place and the agent does not spread.

As can be seen from this expression, the numerical value of the spreading coefficient varies depending on the surface tension of the target fluid. For example, when the surface tension of the target liquid is 72 mN / m, the surface tension of the agent for cleaving the liquid film is 21 mN / m; and when the surface tension at the interface between their phases is 0.2 mN / m, the spreading coefficient becomes 50.8 mN / m.

In addition, when the surface tension of the target liquid is 30 mN / m, the surface tension of the agent for splitting the liquid film is 21 mN / m; and when the surface tension at the interface between their phases is 0.2 mN / m, the spreading coefficient becomes 8.8 mN / m.

In any case, for an agent with a higher spreading coefficient, the effect of splitting the liquid film becomes greater.

In the present description, the numerical value of the surface tension is 50 mN / m. However, even if the surface tension is different, there is no change in the ratio of the numerical value of the spreading coefficient between the substances. Therefore, even if the surface tension of the bodily fluid is to be changed depending on the daily physical condition or the like, the agent having the higher spreading coefficient exhibits an excellent effect of splitting the liquid film.

{0067}

The surface tension of the compound contained in the liquid film splitting agent of the first aspect is preferably 32 mN / m or less, more preferably 30 mN / m or less, even more preferably 25 mN / m or less, and particularly preferably 22 mN / m or less. In addition, the surface tension is preferably less and its lower limit is not limited in any way. From the viewpoint of the wear resistance of the liquid film splitting agent, the surface tension is practically 1 mN / m or more, and may be 20 mN / m or more.

Even when the surface tension of the target liquid that forms the liquid film is decreased, the effect of splitting the liquid film can be effectively demonstrated by adjusting the surface tension of the agent for splitting the liquid film to a level equal to or less than the range described above.

{0068}

Further, in the compound contained in the agent for splitting the liquid film of the second aspect, to have “its interfacial tension with respect to the liquid having a surface tension of 50 mN / m” of 20 mN / m or less, as discussed above, means that the diffusion coefficient of the agent for splitting the liquid film on the liquid film is improved. Thus, even when the spreading coefficient is relatively small, such as in the case where the “spreading coefficient on a liquid having a surface tension of 50 mN / m” is less than 15 mN / m, the diffusion coefficient is high, and therefore a large amount of the agent for splitting the liquid the film is dispersed in the liquid film from the surface of the fibers, and the same action as in the case of the first aspect can be produced by repelling the liquid film at many positions.

{0069}

From the point of view of more effectively demonstrating the effect of the agent for splitting the liquid film, the “interfacial tension with respect to the liquid having a surface tension of 50 mN / m” of the compound contained in the agent for splitting the liquid film of the second aspect is preferably 17 mN / m or less, more preferably 13 mN / m or less, even more preferably 10 mN / m or less, even more preferably 9 mN / m or less, and particularly preferably 1 mN / m or less. The lower limit is not in any way limited in the same way as for the first aspect, and from the point of view of insolubility in a liquid film (a liquid having a surface tension of 50 mN / m), the surface tension at the interface is practically brought to more than 0 mN / m and may be 3 mN / m or more.

In addition, from the viewpoint of more effectively demonstrating the effect of the agent for cleaving a liquid film, the “spreading coefficient on a liquid having a surface tension of 50 mN / m” is preferably 9 mN / m or more, more preferably 10 mN / m or more. and even more preferably 15 mN / m or more. Its upper limit is not particularly limited, but from the viewpoint that the surface tension of the liquid that forms the liquid film serves as the upper limit according to Expression (1), the spreading coefficient is substantially 50 mN / m or less.

More preferred ranges of surface tension and water solubility of the compound contained in the liquid film splitting agent of the second aspect are the same as those of the first aspect.

{0070}

As described above, the compound contained in the liquid film splitting agent of the first aspect has a spreading ratio and water solubility described above, and the compound contained in the liquid film splitting agent of the second aspect has a spreading ratio, interfacial tension and the water solubility described above, wherein the compounds can spread over the surface of the liquid film without dissolving and can repel the liquid film layer from a position near the center of the liquid film. Thus, the liquid film is destabilized and disintegrated.

{0071}

The nonwoven fabric containing the liquid film splitting agent of the first aspect and the nonwoven fabric containing the liquid film splitting agent of the second aspect each preferably further comprise an anionic surfactant of the phosphoric acid ester type. Thus, the hydrophilicity to the fiber surface is improved and the wettability is improved to increase the contact area at which the liquid film and the liquid film splitting agent come into contact. In addition, since blood and urine contain a surfactant having a phosphoric acid group, which comes from a living organism, when a surfactant containing a phosphoric acid group is used together with an agent to break down a liquid film, the surfactant has compatibility with an agent for splitting a liquid film and a subtle affinity for phospholipid contained in blood and urine. Thereby, the agent for splitting the liquid film easily enters the liquid film, and further splitting of the liquid film is induced. The ratio of the total amount of the agent for cleaving the liquid film to the total amount of the anionic surfactant of the phosphoric acid ester type is preferably from 1: 1 to 19: 1, more preferably from 2: 1 to 15: 1, and even more preferably, 3: 1 to 10: 1, in terms of mass ratio (liquid film splitting agent: anionic surfactant of the phosphoric acid ester type). In particular, the content ratio is preferably 5: 1 to 19: 1, more preferably 8: 1 to 16: 1, and even more preferably 11: 1 to 13: 1, in terms of the mass ratio.

{0072}

An anionic surfactant of the phosphoric acid ester type can be used without any restrictions. For example, the materials described in the {0031} paragraph of WO 2016/098796 and the like may be contained.

{0073}

The following will describe specific examples of agents for cleaving a liquid film of the first aspect and the second aspect. They are in the specific range of numerical values discussed above in order to have properties of insolubility in water or low solubility in water and to demonstrate the effect of splitting the liquid film. In contrast, a surfactant or the like for use as a conventional fiber treating agent is basically a water-soluble agent that is practically dissolved in water and used, rather than an agent for splitting the liquid film of the present invention.

{0074}

The agent for cleaving the liquid film of the first aspect and the second aspect preferably contains a compound having a weight average molecular weight of 500 or more. The weight average molecular weight strongly influences the viscosity of the liquid film splitting agent. The compound contained in the liquid film splitting agent hardly flows downward when the liquid passes through the space between the fibers, due to its high viscosity, and can keep the liquid film splitting effect constant in the nonwoven fabric. From the viewpoint of adjusting the viscosity at such a level that the long-term effect of splitting the liquid film is sufficiently maintained, the weight average molecular weight of the compound contained in the agent for breaking the liquid film is more preferably 1000 or more, even more preferably 1500 or more. and particularly preferably 2000 or more. On the other hand, from the point of view of adjusting the viscosity to a level at which the liquid film splitting agent migrates from the fibers containing the liquid film splitting agent disposed thereon into the liquid film, namely, the macroscopic diffusion coefficient and the microscopic diffusion coefficient are maintained , its weight average molecular weight is preferably 50,000 or less, more preferably 20,000 or less, and even more preferably 10,000 or less. The measurement of the weight average molecular weight is carried out using the GPC “CCPD” (trade name, manufactured by TOSOH CORPORATION). The measurement conditions are as described below. In addition, the calculation of the equivalent molecular weight is carried out using polystyrene.

Separation column: GMHHR – H + GMHHR – H (cationic)

Eluent: L FAMIN DM20 / CHCl ₃

Solvent flow rate: 1.0ml / min

Separation column temperature: 40ºC

{0075}

In addition, as discussed below, the agent for cleaving the liquid film of the first aspect preferably contains a compound having a structure of at least one kind selected from the group consisting of the following structures X, X — Y and Y — X — Y.

Structure X denotes a siloxane chain having a structure in which any of the main structures> C (A) - (C denotes a carbon atom, in addition, <,> and -, each denotes a bridging bond below, the same applies hereinafter), - C (A) ₂ -, –C (A) (B) -,> C (A) –C (R ¹ ) <,> C (R ¹ ) -, –C (R ¹ ) (R ² ) -, –C (R ¹ ) ₂ -,> C <, –Si (R ¹ ) ₂ O– and –Si (R ¹ ) (R ² ) O– are repeated, or two or more of their types are combined; or a mixed chain of them. The structure X contains at the end of the structure X a hydrogen atom or at least one kind of a group selected from the group containing –C (A) ₃ , –C (A) ₂ B, –C (A) (B) ₂ , - C (A) ₂ –C (R ¹ ) ₃ , –C (R ¹ ) ₂ A, –C (R ¹ ) ₃ , –OSi (R ¹ ) ₃ , –OSi (R ¹ ) ₂ (R ² ), –Si (R ¹ ) ₃ and –Si (R ¹ ) ₂ (R ² ).

The above R^one and R²each independently represents a different substituent such as a hydrogen atom, an alkyl group (the number of carbon atoms is preferably 1 to 20, for example a methyl group, an ethyl group or a propyl group is preferred), an alkoxy group (the number of carbon atoms is preferably 1 to 20, for example a methoxy group or an ethoxy group are preferable), an aryl group (the number of carbon atoms is preferably 6-20, for example a phenyl group is preferable) and a halogen atom (for example a fluorine atom is preferable). A and B each independently represent a substituent containing an oxygen atom or a nitrogen atom such as a hydroxy group, a carboxylic acid group, an amino group, an amide group, an imino group, and a phenol group. When the structure X contains a set R^one, R², A and B, they each can be identical or different from each other. In addition, the continuous bond between the atoms C (carbon atoms) or between Si atoms is usually a single bond, but may include a double bond or a triple bond, and a bond between C atoms or between Si atoms may include a linking group such as an ether (–O–) group, an amide group (–CONR^A-: R^A represents a hydrogen atom or a monovalent group), an ester group (–COO–), a carbonyl group (–CO–), or a carbonate group (–OCOO–). The number of bonds of one C and one Si with any other C or Si is 1-4, and a long-chain silicone chain (siloxane chain) or a mixed chain can branch or have a radial structure.

Y represents a hydrophilic group having hydrophilicity, the group contains an atom selected from a hydrogen atom, a carbon atom, an oxygen atom, a nitrogen atom, a phosphorus atom, or a sulfur atom. Specific examples thereof include a single hydrophilic group such as a hydroxy group, a carboxylic acid group, an amino group, an amide group, an imino group, a phenol group, a POA group (the number of carbon atoms of the oxyalkylene group is preferably 1-4, for example, POE and POP group), sulfonic acid group, sulfate group, phosphoric acid group, sulfobetaine group, carbobetaine group, phosphobetaine group (betaine group means a betaine residue group formed by removing one hydrogen atom from each betaine compound) and a quaternary ammonium group; or a hydrophilic group formed from a combination thereof. In addition to this, their specific examples also include the group and functional group listed in M ¹ , as discussed below. In addition, when a plurality of Y exist, these groups may be identical or different from each other.

In structures X – Y and Y – X – Y, Y is bonded to X or to a group at the end of X. When Y is bonded to a group at the end of X, for example, the group at the end of X is bonded to Y, then hydrogen atoms are removed, and so similar, in an amount identical to the number of bonds with Y.

In this structure, the above-discussed spreading coefficient, water solubility and interfacial tension can be achieved by selecting the hydrophilic groups Y, A and B from those specifically described. Thus, the targeted effect of splitting the liquid film is developed.

{0076}

The above-described agent for cleaving the liquid film preferably contains a compound in which the structure X has the structure of a siloxane. In addition, as specific examples of the above-described structures X, X-Y and Y-X-Y, the agent for cleaving the liquid film preferably contains a compound containing a siloxane chain in which the structures represented by any of the following Formulas (1) to ( 11), combined in an arbitrary way. In addition, from the viewpoint of the cleaving action of the liquid film, it is preferable that the compound has a weight average molecular weight in the range discussed above.

{0077}

{0078}

In Formulas (1) to (11), M ¹ , L ¹ , R ²¹ and R ²² denote the following monovalent or multivalent (divalent or having a higher valence) group. R ²³ and R ²⁴ denote the following monovalent or multivalent (divalent or having a higher valence) group or a single bond.

M ¹ represents a POE group, a POP group, a POB group, a group containing a POA group in combination therewith, an erythritol group, a xylitol group, a sorbitol group, a hydrophilic group containing a plurality of hydroxy groups such as a glycerol group or an ethylene glycol group (hydrophilic group, formed by removing one hydrogen atom from the above-described compound containing a plurality of hydroxy groups such as erythritol), hydroxy group, carboxylic acid group, mercapto group, alkoxy group (the number of carbon atoms is preferably 1-20, for example, methoxy group is preferred ), amino group, amide group, imino group, phenol group, sulfonic acid group, quaternary ammonium group, sulfobetaine group, hydroxysulfobetaine group, phosphobetaine group, imidazolinium betaine group, carbobetaine group, epoxy group, carbinol group, (meth) acrylic group or functional group combined with them. In addition, when M ¹ is a multivalent group, M ¹ is a group formed by further removing one or more hydrogen atoms from each of the groups or functional group as discussed above.

L ¹ denotes a linking group of an ether group, an amino group (an amino group which can be taken as L ¹ represented by> NR ^C (R ^C is a hydrogen atom or a monovalent group)), an amide group, an ester group, a carbonyl group or a carbonate group ...

R ²¹ , R ²² , R ²³ and R ²⁴ each independently represent an alkyl group (the number of carbon atoms is preferably 1-20, for example, methyl group, ethyl group, propyl group, isopropyl group, butyl group, pentyl group, hexyl group, heptyl group, 2-ethylhexyl group, nonyl group or decyl group), alkoxy group (the number of carbon atoms is preferably 1-20, preferably, for example, a methoxy group or ethoxy group), aryl group (the number of carbon atoms preferably 6 to 20, for example a phenyl group is preferred), a fluoroalkyl group, an aralkyl group, a hydrocarbon group in combination with them, or a halogen atom (for example, a fluorine atom is preferred). In addition, when R ²² and R ²³ are a multivalent group, R ²² and R ²³ are a multivalent hydrocarbon group formed by further removing one or more hydrogen atoms or fluorine atoms from the above-described hydrocarbon group.

In addition, when R ²² or R ²³ is bonded to M ¹ , specific examples of a group acceptable as R ²² or R ²³ include, in addition to each of the groups, hydrocarbon group or halogen atom described above, an imino group acceptable as R ³² .

Among other things, the agent for cleaving the liquid film preferably contains a compound having a structure represented by any of Formulas (1), (2), (5) and (10) as X, and contains a compound having a structure represented by any of the above formulas other than these formulas as a group formed at the X end or formed at the X and Y ends. In addition, the group formed from X or formed from the X and Y ends preferably contains a compound containing a siloxane chain having at least least one structure represented by any of the above Formulas (2) (4), (5), (6), (8) and (9).

{0079}

Specific examples of the above-described compound include an organically modified silicone (polysiloxane) of a silicone-based surfactant. Specific examples of organically modified silicone modified with a reactive organic group include amino modified silicone, epoxy modified silicone, carboxy modified silicone, diol modified silicone, carbinol modified silicone, (meth) acrylic modified silicone, mercapto modified silicone and phenol-modified silicone. In addition, specific examples of organically modified silicone modified with a chemically inactive organic group include polyether modified silicone (including POA modified silicone), methyl styryl modified silicone, long chain alkyl modified silicone, higher fatty acid ester modified silicone, higher alkoxy modified silicone, higher fatty acid modified silicone and fluorine modified silicone. The spreading coefficient at which the above-described action of splitting the liquid film is carried out can be obtained by appropriately changing the molecular weight of the silicone chain, the modification ratio, the number of added moles of the modifying group, or something similar in accordance with, for example, the types of organically modified silicone. The term “long chain” as used herein means a material in which the number of carbon atoms is 12 or more, and preferably from 12 to 2. In addition, the term “higher” means a material in which the number of carbon atoms is 6 or more, and preferably , from 6 to 20.

Among other things, a modified silicone having a structure in which the agent for cleaving a liquid film, which is a modified silicone, contains at least one oxygen atom in a modifying group, such as POA-modified silicone, epoxy-modified silicone, carbinol- modified silicone and diol-modified silicone are preferred and POA-modified silicone is particularly preferred. POA-modified silicone hardly penetrates into fibers and easily remains on their surface, since POA-modified silicone contains a polysiloxane chain. In addition, the affinity for water is improved, and the interfacial tension becomes low when the hydrophilic POA chain is added, and for this reason, movement to the surface of the liquid film is easily induced, as discussed above, and such a case is preferable. In addition, even if a thermal injection treatment such as embossing is applied, the POA-modified silicone easily remains on the surface of the fibers in this part, and the splitting effect of the liquid film is hardly diminished. The splitting action of the liquid film is sufficiently developed, especially in the embossed part in which liquid is easily collected, and such a case is preferable.

{0080}

Specific examples of POA-modified silicone include compounds represented by the following Formulas [I] to [IV]. In addition, the POA-modified silicone preferably has a weight average molecular weight in the above range from the point of view of liquid film splitting action.

{0081}

{0082}

{0083}

{0084}

{0085}

In the Formulas, R ³¹ represents an alkyl group (the number of carbon atoms is preferably 1-20, for example, a methyl group, an ethyl group, a propyl group, an isopropyl group, a butyl group, a pentyl group, a hexyl group, a heptyl group, a 2-ethyl –Hexyl group, nonyl group or decyl group). R ³² represents a single bond or an alkylene group (the number of carbon atoms is preferably 1-20, for example a methylene group, an ethylene group, a propylene group or a butylene group is preferred), and preferably an alkylene group. The plurality of R ³¹ and the plurality of R ³² may each be the same or different from each other. M ¹¹ represents a group containing a POA group, and a POA group is preferred. Specific examples of the above-described POA group include a POE group, a POP group, a POB group, or a material in which their constituent monomers are copolymerized. Then, m and n are each independently an integer of 1 or more. In addition, the designations of these repeating units are defined separately in each of Formulas [I] to [IV] and do not always represent the same integer and may differ from each other.

{0086}

In addition, POA-modified silicone may contain either one or both of the modifying groups of the POE modification and the POP modification. In addition, the modified silicone preferably contains a methyl group in R ³¹ as an alkyl group in the silicone chain in order to have water insolubility and low interfacial tension. The material containing this modified group or silicone chain is not limited in any way, but the materials described in paragraphs {0006} and {0012} of JP-A-2002-161474 are illustrative. Other specific examples include POE · POP-modified silicone, POE-modified silicone, and POP-modified silicone. Specific examples of POE-modified silicone include POE (3) -modified dimethyl silicone to which 3 moles of POE are added. Specific examples of POP-modified silicone include POP (10) -modified dimethylsilicone, POP (12) -modified dimethylsilicone, and POP (24) -modified dimethylsilicone to which 10 mol POP, 12 mol POP and 24 mol POP are added, respectively.

{0087}

The spreading coefficient and water solubility of the compound contained in the first aspect discussed above can be adjusted within specified ranges, for example, in POA-modified silicone, using the number of added moles of the POA group (the number of linking oxyalkylene groups that form the POA group, with respect to 1 mol POA-modified silicone), following the modification ratio or the like. In this compound contained in the agent for splitting the liquid film, the surface tension and the interfacial tension can be adjusted within predetermined ranges in the same manner, respectively.

From the point of view described above, the amount of added moles of polyoxyalkylene groups is preferably 1 or more. The number of moles is adjusted to a value equal to or greater than the lower limit, whereby the interfacial tension decreases for the above-described action of splitting the liquid film and the spreading coefficient increases, and therefore, a sufficient effect of splitting the liquid film can be obtained. In addition, from the same point of view, the amount of added moles is more preferably 3 or more, and even more preferably 5 or more. On the other hand, the amount of added moles is preferably 30 or less, more preferably 20 or less, and even more preferably 10 or less. The amount of added moles is adjusted to a value equal to or less than the upper limit, whereby the compound becomes hydrophobic, and therefore, the water solubility can be kept low.

The modification ratio of the modified silicone is preferably 5% or more, more preferably 10% or more, and even more preferably 20% or more, in order to maintain the hydrophilicity required for the cleavage action of the liquid film (in particular for flowability). In addition, the modification ratio is preferably 95% or less, more preferably 70% or less, and even more preferably 40% or less, in order to maintain the water insolubility necessary for the cleavage action of the liquid film. In addition, the modification ratio of the modified silicone means the proportion of the number of repeating units of the binding portion of the modified siloxane relative to the total repeating units of the binding portion of the siloxane in one molecule of the modified silicone. For example, the modification ratio is determined by the expression: (n / m + n) × 100% in Formulas [I] and [IV], the expression: (2 / m) × 100% in Formula [II] and the expression: (1 / m) × 100% in Formula [III].

In addition, the spreading coefficient and the water solubility discussed above can each be set within a predetermined range, in addition to the material described above, in POA-modified silicone, through the simultaneous use of a water-soluble POE group and a water-insoluble POP group and a water-insoluble POB group in as a modifying group, by changing the molecular weight of the water-insoluble silicone chain; introducing an amino group, an epoxy group, a carboxy group, a hydroxy group, a carbinol group, or the like thereto, in addition to modifying the POA, as a modifying group; or something like that.

{0088}

The polyalkylene modified silicone used as an agent for cleaving the liquid film is preferably contained at 0.02 mass% or more and 5 mass% or less in terms of the proportion (sizing) relative to the mass of the nonwoven fabric. The proportion (OPU) of the polyalkylene-modified silicone is more preferably 1% by mass or less, and even more preferably 0.4% by mass or less. Thus, the nonwoven fabric has a preferred texture. In addition, from the viewpoint of effectively demonstrating the effect of splitting the liquid film by the polyalkylene-modified silicone, the OPU content is more preferably 0.04 mass% or more, and even more preferably 0.1 mass% or more. In this case, the agent for cleaving the liquid film may contain a compound other than polyalkylene-modified silicone. The total amount of agent for disintegrating the liquid film in this case is preferably in the above range.

In addition, the weight of the nonwoven fabric herein means the fiber weight of the nonwoven fabric as a whole (this also refers to the percentage of content (OPU) described below).

{0089}

As discussed below, the agent for cleaving the liquid film of the second aspect preferably contains a compound having at least one kind of structure selected from the group consisting of the following structures Z, Z — Y and Y — Z — Y.

Structure Z denotes a hydrocarbon chain having a structure in which any of the basic structures is repeated> C (A) - (C: carbon atom), –C (A) ₂ -, –C (A) (B) -,> C ( A) –C (R ³ ) <,> C (R ³ ) -, –C (R ³ ) (R ⁴ ) -, –C (R ³ ) ₂ - and> C <or two or more of their types are combined. Structure Z has at its end a hydrogen atom or at least one type of group selected from the group containing –C (A) ₃ , –C (A) ₂ B, –C (A) (B) ₂ , –C (A) ₂ –C (R ³ ) ₃ –C (R ³ ) ₂ A and –C (R ³ ) ₃ .

The above-described R ³ and R ⁴ each independently denote different kinds of substituents such as a hydrogen atom, an alkyl group (the number of carbon atoms is preferably 1-20, for example, a methyl group, an ethyl group, a propyl group, an isopropyl group , butyl group, pentyl group, hexyl group, heptyl group, 2-ethyl-hexyl group, nonyl group or decyl group), alkoxy group (the number of carbon atoms is preferably 1-20, preferably, for example, a methoxy group or an ethoxy group) , an aryl group (the number of carbon atoms is preferably 6-20, for example a phenyl group is preferred), a fluoroalkyl group or an arkyl group, or a hydrocarbon group in combination with them, or a fluorine atom. A and B each independently represent a substituent containing an oxygen atom or a nitrogen atom such as a hydroxy group, a carboxylic acid group, an amino group, an amide group, an imino group, or a phenol group. When a plurality of R ³ , R ⁴ , A, or B are each included in the structure Z, they may be the same or different from each other. In addition, the continuous bond between C atoms (carbon atoms) is usually a single bond, but may include a double bond or a triple bond, and the bond between C atoms may include a linking group such as an ether group, amide group, ester group, carbonyl group or carbonate group. The number of bonds of one C with any other C is 1-4, and the long-chain hydrocarbon chain may have a branched structure or may have a radial structure.

Y represents a hydrophilic group having hydrophilicity, the hydrophilic group contains an atom selected from a hydrogen atom, a carbon atom, an oxygen atom, a nitrogen atom, a phosphorus atom, and a sulfur atom. Specific examples thereof include: a hydroxy group, a carboxylic acid group, an amino group, an amide group, an imino group, and a phenol group; a POA group (the number of carbon atoms of the oxyalkylene group is preferably 1-4, for example a POE group, a POP group, a POB group or a POA group in combination with them are preferred); a hydrophilic group containing a plurality of hydroxy groups such as an erythritol group, a xylitol group, a sorbitol group, a glycerol group, and an ethylene glycol group; a separate hydrophilic group such as a sulfonic acid group, a sulfate group, a phosphoric acid group, a sulfobetaine group, a carbobetainic group, a phosphobetainic group, a quaternary ammonium group, an imidazolinium betaine group, an epoxy group, a carbonyl group, and a methacrylic group; or a hydrophilic group formed from a combination thereof. In addition, when there are multiple Y groups, they may be identical or different from each other.

In the Z – Y and Y – Z – Y structures, Y is bonded to a Z or a group at the Z-end. When Y is bonded to a group at the Z-end, the group at the Z-end binds to Y, for example, after the hydrogen atoms are removed and that– then something like that is identical to the number of bonds with Y.

In this structure, the spreading coefficient, water solubility and interfacial tension discussed above can be achieved by selecting the hydrophilic groups Y, A and B from the specifically described groups. Thus, the targeted effect of splitting the liquid film is developed.

{0090}

In a second aspect, specific examples of the above-described Z, Z-Y and Y-Z-Y structures and specific examples of a liquid film splitting agent containing these structures may include the material described in paragraphs {0051} - {0085} of WO 2016 / 098796.

{0091}

The spreading coefficient, surface tension, water solubility and interfacial tension, each discussed above, in the second aspect can be selected in a predetermined range, in the above-described hydrocarbon compound having a number of carbon atoms of 5 or more, for example, by introducing its small amount of hydrophilicity of the POE group at such a level that water insolubility can be maintained by introducing a POP group or a POB group that is hydrophobic, but can reduce the interfacial tension by changing the chain length of the hydrocarbon chain by using a material containing a branched a chain, in a hydrocarbon chain, by using a material containing a double bond in a hydrocarbon chain, by using a material containing a benzene ring or a naphthalene ring in a hydrocarbon chain, or the like.

{0092}

In the nonwoven fabric of the present invention, in addition to the above agent for cleaving the liquid film, other components may be contained as needed. In addition, the liquid film splitting agent of the first aspect and the liquid film splitting agent of the second aspect can be used in combination in addition to the aspect of using them separately. This point is the same for the first compound in the agent for cleaving the liquid film of the second aspect (namely, for the polyether compound or for the nonionic surfactant described in paragraph {0054} and subsequent paragraphs in WO 2016/098796), and for the second compound (namely, for a hydrocarbon compound containing 5 or more carbon atoms described in paragraph {0060} and subsequent paragraphs of WO 2016/098796). At this time, one or more compounds selected from compound (C1) and compound (C2) discussed above can be used as an agent for cleaving the liquid film.

{0093}

In addition, in the nonwoven fabric of the present invention, when an agent for cleaving a liquid film or an anionic surfactant of the phosphoric acid ester type contained therein is identified, the identification method described in the above method for measuring surface tension (γ _w ) a liquid film (liquid having a surface tension of 50 mN / m), or something similar.

In addition, when the component of the agent for cleaving the liquid film is a compound in which the main chain contains a siloxane chain, or a hydrocarbon compound in which the number of carbon atoms is 1 or more and 20 or less, its content fraction (OPU) relative to the weight of the nonwoven fabric can be determined by dividing the proportion of the liquid film splitting agent by the weight of the fiber with respect to the weight of the substance obtained by the analytical method described above.

{0094}

The nonwoven fabric in this embodiment has a high effect of reducing the amount of residual liquid and excellent dryness, and therefore becomes a material having excellent liquid permeability regardless of the fiber diameter and the distance between the fibers. Therefore, as described in paragraphs {0089} to {0092} of WO 2016/098796, the fiber spacing required for liquid permeability of the nonwoven fabric can be further reduced. Thus, it is possible to obtain a nonwoven fabric having a softer texture by using finer fibers.

{0095}

As an aspect of such a nonwoven fabric in this embodiment, the nonwoven fabric can be formed according to various aspects. For example, a nonwoven fabric can be formed from one layer of fibers or two or more layers of fibers. In addition, it is possible to form a nonwoven fabric having a flat shape or a concave-convex shape. Specific examples of a nonwoven material having a concave-convex shape include such material as described in paragraphs {0100} to {0110} and in Figures 3-11 of WO 2016/098796.

{0096}

The nonwoven fabric of the present invention can be applied in various fields having the advantages of the properties of reducing the residual amount of the liquid and the properties of preventing liquid leakage on the surface, and high dryness due to such properties. For example, such a material is preferably used as a topsheet, a second sheet (a sheet sandwiched between a topsheet and an absorbent body), an absorbent body, a cover sheet covering an absorbent body, or a leakage prevention sheet in an absorbent article used to absorb liquid released from an organism such as a sanitary napkin, panty liners, disposable diapers, urological pads; toilet paper; skin care sheet; also, an object napkin or something similar.

{0097}

An absorbent article used to absorb body fluid is typically provided with a topsheet, a backsheet, and a liquid-retaining absorbent body sandwiched between both sheets. As the absorbent body and backsheet, when the nonwoven fabric of the present invention is used as the topsheet, a material commonly used in the technical field can be used without any limitation. For example, as an absorbent mass, such a material can be used after it has been produced by covering a fiber aggregate such as a silk paper and a nonwoven fabric with a fiber aggregate formed from a fibrous material such as pulp fibers or an aggregate of fibers with a super absorbent polymer therein. As the backing sheet, a thermoplastic resin film or a liquid impermeable or water repellent sheet such as a film and nonwoven laminate can be used. The backing sheet may be water vapor permeable. The absorbent article can be further provided with various elements in accordance with the specific application of the absorbent article. Such elements are known to those skilled in the art. For example, when the absorbent article is used in a disposable diaper or sanitary napkin, one pair or two or more pairs of three-dimensional fasteners may be located on both right-left-hand portions of the topsheet.

{0098}

With respect to the above embodiments, the present invention further describes a nonwoven fabric, an absorbent article, and fiber treating agents as described below.

{0099}

<1>

A nonwoven fabric containing an agent for splitting a liquid film, where the proportion of the reduction in surface tension in the following "Method for measuring the proportion of reduction in the surface tension of a bodily fluid" is less than 25%:

[Method for measuring the proportion of reduction in the surface tension of a bodily fluid]

(1) Prepare the following test fluid. Its surface tension is measured using the plate method in an environment at a temperature of 25 ° C and a relative humidity (RH) of 65%.

The liquid for research is prepared by adjusting the mixing ratio corresponding to the viscosity of 8 cP, by mixing the liquid of the upper layer and the liquid of the lower layer,

and both the top layer fluid and the bottom layer fluid are obtained as separate top layer and bottom layer of defibrinated horse blood, respectively, leaving 100 ml of defibrinated horse blood to stand at 22 ° C and 65% humidity for 1 hour.

(2) A sample of nonwoven fabric is prepared, which is coated with components located on the surface of fibers of the target nonwoven fabric, excluding the agent for splitting the liquid film. Determine the number of components of the coating after identifying the structure, extract the number and proportion of components from the nonwoven material based on this identification. The nonwoven sample, after coating, is directly adhered to a Petri dish having a diameter of 5 cm × 5 cm, and the test liquid is repeatedly passed through it, 3 g passes through it during each operation and 15 g in total.

(3) The surface tension of the liquid that is passed through it is measured using the plate method used in procedure (1).

(4) Calculate the percentage of reduction (%) in the surface tension of the test liquid upon passage through the nonwoven fabric in procedure (3) with respect to the surface tension of the research liquid before passing through the nonwoven fabric in procedure (1).

{0100}

<2>

A nonwoven fabric containing one or more compounds selected from the following compound (C1) and the next compound (C2), where the proportion of reduction in surface tension in the following “Method for measuring the proportion of reduction in surface tension of a bodily fluid” is less than 25%:

(C1) A compound having a spreading coefficient of 15 mN / m or more on a liquid having a surface tension of 50 mN / m and a water solubility of 0 g or more and 0.025 g or less; and

(C2) A compound having a spreading coefficient greater than 0 mN / m on a liquid having a surface tension of 50 mN / m, a water solubility of 0 g or more and 0.025 g or less, and an interfacial tension of 20 mN / m or less by a liquid having a surface tension of 50 mN / m;

[Method for measuring the proportion of reduction in the surface tension of a bodily fluid]

(1) Prepare the following test fluid. Its surface tension is measured using the plate method in an environment at a temperature of 25 ° C and a relative humidity (RH) of 65%.

The liquid for research is prepared by adjusting the mixing ratio corresponding to the viscosity of 8 cP, by mixing the liquid of the upper layer and the liquid of the lower layer,

and both the top layer fluid and the bottom layer fluid are obtained as separate top layer and bottom layer of defibrinated horse blood, respectively, leaving 100 ml of defibrinated horse blood to stand at 22 ° C and 65% humidity for 1 hour.

(2) A nonwoven sample is prepared to which components other than compound (C1) and compound (C2) are applied from the components located on the surface of the target nonwoven material. Determine the number of components of the coating, after identifying the structure, extract the number and proportion of components from the nonwoven material, based on this identification. The nonwoven sample, after coating, is directly adhered to a Petri dish having a diameter of 5 cm × 5 cm, and the test liquid is repeatedly passed through it, 3 g passes through it during each operation and 15 g in total.

(3) The surface tension of the liquid that is passed through it is measured using the plate method used in procedure (1).

(4) Calculate the percentage of reduction (%) in the surface tension of the test liquid upon passage through the nonwoven fabric in procedure (3) with respect to the surface tension of the research liquid before passing through the nonwoven fabric in procedure (1).

{0101}

<3>

The nonwoven fabric according to <1> or <2> above, wherein the reduction in surface tension is 23% or less, preferably 17% or less, more preferably 12% or less, and even more preferably 0%.

{0102}

<4>

A nonwoven fabric according to any of the above <1> to <3>, further comprising one or more components selected from the following components (D1), (D2) and (D3):

(D1) Non-ionic surfactant;

(D2) A compound having a surface tension of 42 mN / m or more; and

(D3) A compound having a melting point of 40 ° C or more, which is more hydrophilic than the liquid film splitting agent or component (C1) and component (C2) and does not contain hydrophilic groups.

{0103}

<5>

A nonwoven fabric containing an agent for cleaving a liquid film and one or more components selected from the following components (D1), (D2) and (D3):

(D1) Non-ionic surfactant;

(D2) A compound having a surface tension of 42 mN / m or more; and

(D3) A compound having a melting point of 40 ° C or more, which is more hydrophilic than a liquid film splitting agent and does not contain hydrophilic groups.

{0104}

<6>

A nonwoven fabric containing one or more compounds selected from the following compound (C1) and the next compound (C2), and one or more components selected from the following components (D1), (D2) and (D3):

(C1) A compound having a spreading coefficient of 15 mN / m or more on a liquid having a surface tension of 50 mN / m and a water solubility of 0 g or more and 0.025 g or less; and

(C2) A compound having a spreading coefficient greater than 0 mN / m on a liquid having a surface tension of 50 mN / m, a water solubility of 0 g or more and 0.025 g or less, and an interfacial tension of 20 mN / m or less by a liquid having a surface tension of 50 mN / m; and

(D1) Non-ionic surfactant;

(D2) A compound having a surface tension of 42 mN / m or more; and

(D3) A compound having a melting point of 40 ° C or more, which is more hydrophilic than compound (C1) and component (C2) and does not contain hydrophilic groups.

{0105}

<7>

The nonwoven fabric according to any of the above <1> to <6>, further comprising an anionic surfactant of the phosphoric acid ester type.

{0106}

<8>

The nonwoven fabric according to any one of the above <4> to <7>, where the mass ratio of the total amount of components (D1), (D2) and (D3) to the total amount of the agent for splitting the liquid film or to the total amount of the compound (C1) and compound (C2) (total weight of components (D1), (D2) and (D3) / total weight of liquid film splitting agent or total weight of compound (C1) and compound (C2)) is 0.25 or more and 9 or less , preferably 0.43 or more, and more preferably 0.53 or more, and preferably 4 or less, and more preferably 2.3 or less.

<9>

The nonwoven fabric according to any one of the above <4> to <7>, where the mass ratio of the total amount of components (D1), (D2) and (D3) to the total amount of the agent for splitting the liquid film or to the total amount of the compound (C1) and compound (C2) (total weight of components (D1), (D2) and (D3) / total weight of liquid film splitting agent or total weight of compound (C1) and compound (C2)) is 0.53 or more and 2.3 or less.

<10>

The nonwoven fabric according to any of the above <4> to <9>, wherein the total amount of components (D1), (D2) and (D3) is 0.06 wt% or more and 3 wt% or less, preferably 0, 1% by mass or more, and more preferably 0.14% by mass or more, and preferably 2.3% by mass or less, and more preferably 1% by mass or less, in terms of proportion of content (OPU) relative to mass non-woven fabric.

<11>

The nonwoven fabric according to any one of the above <4> to <9>, wherein the total amount of components (D1), (D2) and (D3) is 0.06 mass% or more and 1 mass% or less in terms of content fraction ( OPU) in relation to the weight of the nonwoven fabric.

{0107}

<12>

The nonwoven fabric according to any of the above <4> to <11>, wherein component (D1) is independently water-soluble.

<13>

The nonwoven fabric according to any one of the above <4> to <12>, wherein the expression “component (D1) independently has water solubility” means that when component (D1) is independently immersed in water for 20 minutes to prepare 2.5 % by mass of an aqueous solution of component (D1), the foam height, estimated according to the following measurement, is 10 mm or more, and preferably 20 mm or less, more preferably 18 mm or less, and even more preferably 15 mm or less:

((Method for measuring foam height after shaking the aqueous solution of component (D1))

First, 0.2 g of component (D1) is weighed, poured into a screw cap vial (No. 4, outer diameter: 24 mm, total length: 53 mm, manufactured by Maruem Co., Ltd.), and then 8 , 0 g of deionized water, and then the resulting mixture was allowed to stand for 20 minutes to sufficiently dissolve the component in deionized water to prepare an aqueous solution.

After vigorously shaking the threaded vial up and down twice, the threaded vial is placed directly on a horizontal plane. After 10 seconds have elapsed from the time immediately after shaking, the height of the structured layer (the height from the liquid level of the liquid layer to the upper surface of the structured layer in which air is retained) of the aqueous solution is measured. This height is taken as the foam height after shaking the aqueous solution of component (D1).

<14>

The nonwoven fabric according to any one of the above <4> to <12>, wherein the expression “component (D1) independently has water solubility” means that when component (D1) is independently immersed in water for 20 minutes to prepare 2.5 % by mass of an aqueous solution of component (D1), the foam height, estimated according to the following measurement, is 10 mm or more and 15 mm or less:

((Method for measuring foam height after shaking the aqueous solution of component (D1))

First, 0.2 g of component (D1) is weighed, poured into a screw cap vial (No. 4, outer diameter: 24 mm, total length: 53 mm, manufactured by Maruem Co., Ltd.), and then poured into it 8 , 0 g of deionized water, and then the resulting mixture was allowed to stand for 20 minutes to sufficiently dissolve the component in deionized water to prepare an aqueous solution.

After vigorously shaking the threaded vial up and down twice, the threaded vial is placed directly on a horizontal plane. After 10 seconds have elapsed from the time immediately after shaking, the height of the structured layer (the height from the liquid level of the liquid layer to the upper surface of the structured layer in which air is retained) of the aqueous solution is measured. This height is taken as the foam height after shaking the aqueous solution of component (D1).

<15>

The nonwoven fabric according to any of the above <4> to <14>, wherein the component (D1) contains a compound having an HLB value higher than the HLB value of the liquid film splitting agent, compound (C1) and compound (C2).

<16>

The nonwoven fabric according to any of the above <4> to <15>, wherein component (D1) contains a compound having an HLB value of 10 or more and 20 or less, preferably 11 or more, and more preferably 13 or more, and preferably 17 or less, and more preferably 15 or less.

<17>

The nonwoven fabric according to any of the above <4> to <15>, wherein the component (D1) contains a compound having an HLB value of 13 or more and 15 or less.

<18>

The nonwoven fabric according to any one of the above <4> to <17>, wherein the component (D1) contains a compound having a melting point of 5 ° C or more and less than 25 ° C, preferably 10 ° C or more, and more preferably 15 ° C or more, and preferably 24 ° C or less, and more preferably 22 ° C or less.

<19>

The nonwoven fabric according to any one of the above <4> to <17>, wherein the component (D1) contains a compound having a melting point of 15 ° C or more and 22 ° C or less.

<20>

A nonwoven fabric according to any of the above <4> to <19>, wherein component (D1) contains at least one surfactant selected from a hydrocarbon-based non-ionic surfactant and a non-ionic surfactant on based on silicone.

<21>

The nonwoven fabric according to any of the above <4> to <20>, wherein the non-ionic surfactant of component (D1) contains at least one hydrophilic group selected from a polyethylene oxide type, a polyol type (polyhydric alcohol), a block type -Polymer and nitrogen-containing type, and contains an alkyl chain or a silicone chain as a hydrophobic group, excluding the framework of a polyhydric alcohol of a fatty acid.

<22>

The nonwoven fabric according to any of the above <4> to <21>, wherein component (D1) contains at least a polyoxyethylene group as a hydrophilic group.

<23>

The nonwoven fabric according to any of the above <4> to <22>, wherein the nonionic surfactant component (D1) contains at least one surfactant selected from the following (D11) and (D12):

(D11) A hydrocarbon-based non-ionic surfactant having a foam height of 10 mm or more after shaking an aqueous solution and containing, as a hydrophilic group, a group consisting of a polyoxyethylene group or a group containing a polyoxyethylene group and any other polyoxyalkylene group, and containing as a hydrophobic group, a straight-chain or branched hydrocarbon chain (excluding the framework of a fatty acid polyhydric alcohol); and

(D12) A non-ionic silicone-based surfactant having a foam height of 10 mm or more after shaking an aqueous solution and containing, as a hydrophilic group, a group consisting of a polyoxyethylene group or a group containing a polyoxyethylene group and any other polyoxyalkylene group, and containing a straight-chain or branched silicone chain as a hydrophobic group.

<24>

A nonwoven fabric according to any of the above <4> to <23>, wherein the nonionic surfactant of component (D1) contains at least one surfactant selected from the following (D11-1), (D11 –2), (D12–1) and (D12–2):

(D11-1) A non-ionic carbon-based surfactant, which is a straight-chain polyoxyethylene alkyl ether containing a polyoxyethylene group as a hydrophilic group, in which the number of added moles of oxyethylene is 5 moles or more, and containing a straight-chain a hydrocarbon chain in which the number of carbon atoms is about 10 or more and 22 or less;

(D11-2) A non-ionic hydrocarbon-based surfactant containing, as a hydrophilic group, a copolymer of a polyoxypropylene group and a polyoxyethylene group, in which the number of added moles of oxyethylene in the polyoxyethylene group is 5 moles or more and the number of added moles of oxypropylene in the polyoxypropylene group is 3 mol or less, and containing a straight-chain hydrocarbon chain as a hydrophobic group;

(D12-1) Non-ionic silicone-based surfactant, which is a side-chain modified silicone containing a polyoxyethylene group in a straight-chain silicone chain; and

(D12-2) Non-ionic silicone-based surfactant obtained by side-chain modification of a straight-chain silicone chain, in which the surfactant contains, as a hydrophilic group, a copolymer, in which the number of added moles of oxyethylene in the polyoxyethylene group and the amount the added moles of oxypropylene in the polyoxypropylene group is 30 mol or more in total, and the amount of added moles of oxyethylene in the polyoxyethylene group is greater than the number of added moles of oxypropylene in the polyoxypropylene group.

<25>

The nonwoven fabric according to any one of the above <4> to <24>, wherein the component (D1) has a melting point of 20 ° C or more and contains a hydrocarbon-based non-ionic surfactant containing a polyoxyethylene group as a hydrophilic group, in which the amount of added moles of oxyethylene is 9 mol, and containing a lauryl group as a hydrophobic group.

<26>

The nonwoven fabric according to any of the above <4> to <25>, wherein the nonionic surfactant component (D1) contains at least one substance selected from the following group:

(Non-ionic hydrocarbon based surfactant)

Nonionic surfactant such as polyethylene oxide: polyoxyethylene alkyl ether and polyoxyethylene fatty acid ester;

Nonionic surfactant such as polyol (polyhydric alcohol): sorbitan monoalkylate, polyoxyethylene sorbitan monoalkylate, glycerol monoalkylate, polyglyceryl monoalkylate, alkyl glucoside and pentaerythritol monoalkylate;

Block polymer nonionic surfactant: polyoxyethylene polyoxypropylene glycol alkyl ether and polyoxyethylene polyoxypropylene alkyl ether; and

Nitrogen-containing non-ionic surfactant: polyoxyethylene alkylamine and polyoxyethylene fatty acid alkylamide; and

(Silicone based non-ionic surfactant)

Nonionic silicone-based surfactant, which is a silicone modified with polyoxyethylene and polyoxypropylene, in which the amount of added moles of oxyalkylene in the polyoxyalkylene group is 30 mol or more, the non-ionic surfactant based on silicone contains one or more polyoxyethylene groups, and the amount added moles of oxyethylene in the polyoxyethylene group is the largest.

<27>

The nonwoven fabric according to any of the above <4> to <26>, wherein the weight average molecular weight of the nonionic surfactant component (D1) is 50 or more and 1500 or less, preferably 100 or more, and more preferably 200 or more, and preferably 1000 or less, and more preferably 750 or less.

{0108}

<28>

The nonwoven fabric according to any of the above <4> to <27>, wherein component (D2) contains a compound in which its surface tension is higher than the surface tension of the agent for splitting the liquid film, or one or more compounds selected from compound ( C1) and compounds (C2).

<29>

The nonwoven fabric according to any of the above <4> to <28>, wherein component (D2) comprises a compound having a surface tension of 42 mN / m or more and 60 mN / m or less, preferably 42.5 mN / m, or more, and more preferably 43 mN / m or more, and preferably 55 mN / m or less, and more preferably 50 mN / m or less.

<30>

The nonwoven fabric according to any of the above <4> to <28>, wherein the component (D2) contains a compound having a surface tension of 43 mN / m or more and 50 mN / m or less.

<31>

The nonwoven fabric according to any one of the above <4> to <30>, wherein the component (D2) contains a compound consisting of a structure containing a hydrophilic group.

<32>

The nonwoven fabric according to the above <31>, wherein the component (D2) contains a compound containing, as a structure containing a hydrophilic group, a structure containing a polyoxyethylene group or a structure containing a block copolymer of a polyoxyethylene group and a polyoxypropylene group.

<33>

The nonwoven fabric according to any one of the above <4> to <32>, wherein component (D2) contains one or more compounds selected from polyethylene glycol and a copolymer of polyethylene glycol and polypropylene glycol.

<34>

The nonwoven fabric according to any of the above <4> to <33>, wherein the weight average molecular weight of the compound contained in component (D2) is 200 or more and 10,000 or less, 300 or more, and preferably 400 or more, and preferably 8000 or less, and more preferably 6000 or less.

<35>

The nonwoven fabric according to any one of the above <4> to <33>, wherein the weight average molecular weight of the compound contained in the component (D2) is 400 or more and 6000 or less.

<36>

The nonwoven fabric according to any one of the above <4> to <35>, wherein when component (D3) contains a copolymer of a polyoxyethylene compound and a polyoxypropylene compound, the polymerization ratio of a polyoxypropylene compound (POP) to a polyoxyethylene compound (POE) (POP degree of polymerization / degree polymerization POE) is greater than 0 and equal to or less than 10, preferably 5 or more, and more preferably 6.5 or more, and preferably 8 or less, and more preferably 7 or less.

<37>

The nonwoven fabric according to any one of the above <4> to <35>, wherein when component (D3) contains a copolymer of a polyoxyethylene compound and a polyoxypropylene compound, the polymerization ratio of a polyoxypropylene compound (POP) to a polyoxyethylene compound (POE) (POP degree of polymerization / degree polymerization POE) is 6.5 or more and 7 or less.

<38>

A nonwoven fabric according to any of the above <4> to <37>, wherein component (D2) contains one or more compounds selected from polyethylene glycol having a weight average molecular weight of 400 and a compound obtained by polymerizing polyethylene glycol and polypropylene glycol in a ratio of about 1 : 7 in terms of mass ratio.

{0109}

<39>

The nonwoven fabric according to any of the above <4> to <38>, wherein the component (D3) contains a compound having a melting point of 40 ° C or more and 120 ° C or less, preferably 50 ° C or more, and more preferably , 60 ° C or more, and preferably 110 ° C or less, and more preferably 100 ° C or less.

<40>

The nonwoven fabric according to any one of the above <4> to <38>, wherein the component (D3) contains a compound having a melting point of 60 ° C or more and 100 ° C or less.

<41>

The nonwoven fabric according to any of the above <4> to <40>, wherein component (D3) contains a compound having a water solubility of 0.01 g or less, preferably 0.001 g or less, and more preferably less than 0 , 0001

<42>

The nonwoven fabric according to any one of the above <4> to <41>, wherein the weight average molecular weight of the compound contained in component (D3) is 200 or more and 5000 or less, preferably 300 or more, and more preferably 400 or more, and preferably 4000 or less, and more preferably 3000 or less.

<43>

The nonwoven fabric according to any one of the above <4> to <41>, wherein the weight average molecular weight of the compound contained in the component (D3) is 400 or more and 3000 or less.

<44>

The nonwoven fabric according to any of the above <4> to <43>, wherein component (D3) contains a hydrocarbon compound.

<45>

The nonwoven fabric according to any of the above <4> to <44>, wherein component (D3) contains a diamide compound.

<46>

The nonwoven fabric according to any of the above <4> to <45>, wherein component (D3) comprises N''N-bis (3-methoxypropyl) isodoco acid diamide.

<47>

The nonwoven fabric according to any one of the above <4> to <46>, wherein component (D3) contains a compound that is more hydrophilic than a liquid film splitting agent or compound (C1) and compound (C2), and the expression “more hydrophilic than agent for cleaving a liquid film or compound (C1) and compound (C2) "means that the IOB value of component (D3) is greater than the IOB value of the agent for cleaving a liquid film or compound (C1) and compound (C2).

<48>

The nonwoven fabric according to the above <47>, wherein the component (D3) contains a compound having an IOB of 0.7 or more and 0.9 or less, preferably 0.75 or more, and preferably 0.85 or less.

<49>

The nonwoven fabric according to <47> above, wherein the component (D3) contains a compound having an IOB of 0.75 or more and 0.85 or less.

<50>

The nonwoven fabric according to any of the above <4> to <49>, wherein the liquid film disintegrant or compound (C1) contains a compound having an IOB value of 0.3 or more and 0.8 or less, preferably 0.45 or more, and more preferably 0.55 or more, and preferably 0.7 or less, and more preferably 0.65 or less.

<51>

The nonwoven fabric according to any of the above <4> to <49>, wherein the liquid film disintegrant or compound (C1) contains a compound having an IOB value of 0.55 or more and 0.65 or less.

<52>

The nonwoven fabric according to any of the above <4> to <51>, wherein the liquid film disintegrant or compound (C2) contains a compound having an IOB value of 0 or more and 0.6 or less, preferably 0.05 or more and more preferably 0.1 or more, and preferably 0.5 or less, and more preferably 0.4 or less.

<53>

The nonwoven fabric according to any of the above <4> to <51>, wherein the liquid film disintegrant or compound (C2) contains a compound having an IOB value of 0.1 or more and 0.4 or less.

{0110}

<54>

A nonwoven fabric according to any of the above <4> to <53>, comprising a mixed layer of an agent for disintegrating a liquid film or one or more compounds selected from compound (C1) and compound (C2) and one or more components selected from components (D1), (D2) and (D3), on the outermost layer of fibers constituting the nonwoven fabric.

<55>

An absorbent article containing a nonwoven material according to any of the above <1> to <54>.

<56>

An absorbent article comprising a topsheet and an absorbent body, wherein the absorbent article comprises a nonwoven material according to any of the above <1> to <54> as the topsheet.

<57>

An agent for treating fibers containing an agent for splitting a liquid film and one or more components selected from the following components (D1), (D2) and (D3):

(D1) Non-ionic surfactant;

(D2) A compound having a surface tension of 42 mN / m or more; and

(D3) A compound having a melting point of 40 ° C or more, which is more hydrophilic than a liquid film splitting agent and does not contain hydrophilic groups.

<58>

A fiber treatment agent containing one or more compounds selected from the following compound (C1) and the next compound (C2), and one or more components selected from the following components (D1), (D2) and (D3):

(C1) A compound having a spreading coefficient of 15 mN / m or more on a liquid having a surface tension of 50 mN / m and a water solubility of 0 g or more and 0.025 g or less; and

(C2) A compound having a spreading coefficient greater than 0 mN / m on a liquid having a surface tension of 50 mN / m, a water solubility of 0 g or more and 0.025 g or less, and an interfacial tension of 20 mN / m or less by a liquid having a surface tension of 50 mN / m; and

(D1) Non-ionic surfactant;

(D2) A compound having a surface tension of 42 mN / m or more; and

(D3) A compound having a melting point of 40 ° C or more, which is more hydrophilic than compound (C1) and compound (C2) and does not contain hydrophilic groups.

<59>

The use of a nonwoven material containing one or more compounds selected from the following compound (C1) and the next compound (C2) for splitting a liquid film, where the proportion of reduction in surface tension in the following "Method for measuring the proportion of reduction in surface tension of a bodily fluid" is less than 25 %:

(C1) A compound having a spreading coefficient of 15 mN / m or more on a liquid having a surface tension of 50 mN / m and a water solubility of 0 g or more and 0.025 g or less; and

(C2) A compound having a spreading coefficient greater than 0 mN / m on a liquid having a surface tension of 50 mN / m, a water solubility of 0 g or more and 0.025 g or less, and an interfacial tension of 20 mN / m or less by liquid having a surface tension of 50 mN / m.

[Method for measuring the proportion of reduction in the surface tension of a bodily fluid]

(1) Prepare the following test fluid. Its surface tension is measured using the plate method in an environment at a temperature of 25 ° C and a relative humidity (RH) of 65%.

The liquid for research is prepared by adjusting the mixing ratio corresponding to the viscosity of 8 cP, by mixing the liquid of the upper layer and the liquid of the lower layer,

and both the top layer fluid and the bottom layer fluid are obtained as separate top layer and bottom layer of defibrinated horse blood, respectively, leaving 100 ml of defibrinated horse blood to stand at 22 ° C and 65% humidity for 1 hour.

(2) A nonwoven sample is prepared to which components other than compound (C1) and compound (C2) are applied from the components located on the surface of the target nonwoven material. Determine the number of components of the coating, after identifying the structure, extract the number and proportion of components from the nonwoven material, based on this identification. The nonwoven sample, after coating, is directly adhered to a Petri dish having a diameter of 5 cm × 5 cm, and the test liquid is repeatedly passed through it, 3 g passes through it during each operation and 15 g in total.

(3) The surface tension of the liquid that is passed through it is measured using the plate method used in procedure (1).

(4) Calculate the percentage of reduction (%) in the surface tension of the test liquid upon passage through the nonwoven fabric in procedure (3) with respect to the surface tension of the research liquid before passing through the nonwoven fabric in procedure (1).

<60>

The use of a nonwoven fabric containing one or more compounds selected from the following compound (C1) and the next compound (C2), and one or more components selected from the following components (D1), (D2) and (D3) for cleavage liquid film:

(C1) A compound having a spreading coefficient of 15 mN / m or more on a liquid having a surface tension of 50 mN / m and a water solubility of 0 g or more and 0.025 g or less; and

(C2) A compound having a spreading coefficient greater than 0 mN / m on a liquid having a surface tension of 50 mN / m, a water solubility of 0 g or more and 0.025 g or less, and an interfacial tension of 20 mN / m or less by a liquid having a surface tension of 50 mN / m; and

(D1) Non-ionic surfactant;

(D2) A compound having a surface tension of 42 mN / m or more; and

(D3) A compound having a melting point of 40 ° C or more, which is more hydrophilic than compound (C1) and compound (C2) and does not contain hydrophilic groups.

EXAMPLES

{0111}

Below, the present invention will be described in more detail with reference to Examples, but the present invention is not limited to them. In addition to this, both the terms “part” and “%” in the Examples refer to mass, unless otherwise noted. In addition, as described above, the spreading coefficient, interfacial tension, surface tension and water solubility are values to be measured in an environment at 25 ° C and 65% relative humidity (RH). Surface tension, water solubility and surface tension at the interface of the agent for splitting the liquid film in the Examples described below, or the like, are measured using the measurement method described in paragraphs {0015} - {0022} of WO 2016/098796 described above. In addition, the melting point of the component (D1), the height of the foam after shaking the aqueous solution of the component (D1) and the HLB in the Examples described below or the like are measured based on the above ((Method for measuring the melting point of the component (D1)) , ((Method for measuring the foam height after shaking the aqueous solution of component (D1)) and ((Method for measuring the HLB value of component (D1)). The surface tension of component (D2) in the Examples described below or something similar is measured based on of the above ((Method for measuring the surface tension of component (D2)). The water solubility of component (D3) is measured in the same manner as for the method for measuring the agent for breaking a liquid film. In addition, the notation “-” in the following Tables means that either the agent shown in the title of the item is not used, or the result has no applicable meaning in this item, or something similar.

{0112}

(Example 1)

(1) Preparation of raw materials of nonwoven fabric

As a fibrous web in the top layer, a top layer fibrous web having a basis weight of 22 g / m ^{2 is} prepared using non-shrinkable fibers having a fineness of 1.2 dtex, and a bottom layer fibrous web having a basis weight of 25 g / m ² , using heat-shrinkable fibers having a fineness of 2.3 dtex. The top layer fibrous web and the bottom fibrous web are then superimposed and the resulting material is embossed on the side of the top layer fibrous web with the same embossing structure as in Example 1 described in JP-A-2015-186543. Thus, a nonwoven fabric 1 is obtained on which a concave bonded portion 19 is formed for bonding the fiber layer 17 on the leather side and the fiber layer 18 on the opposite skin side, as shown in FIG. 2. From the obtained nonwoven fabric, nonwoven starting materials having a size of 400 mm × 140 mm were prepared in Example 1.

(2) Preparation of the liquid for application

The following liquid film splitting agent and the next component (D1) are mixed at a ratio of 75:25 in terms of weight ratio under room temperature conditions of 25 ° C to prepare an application liquid.

<Liquid film splitting agent>

A POE – modified dimethyl silicone compound (trade name “KF – 6015,” manufactured by Shin – Etsu Chemical Co., Ltd.), in which X in the X – Y structure is formed from a dimethyl silicone chain containing –Si (CH ₃ ) ₂ O–, Y is formed from a POE chain containing - (C ₂ H ₄ O) -, the end group of the POE chain is a methyl group (CH ₃ ), the modification ratio is 20%, the number of added moles of oxyethylene is 3 and the weight average molecular weight is 4000.

The agent for splitting a liquid film has a surface tension of 21.0 mN / m and a water solubility of less than 0.0001 g. In addition, the spreading coefficient of an agent for splitting a liquid film on a liquid having a surface tension of 50 mN / m is 28.8 mN. / m and its surface tension at the interface with respect to a liquid having a surface tension of 50 mN / m is 0.2 mN / m. These numerical values are measured using the measurement method discussed above. Optionally, as the “liquid having a surface tension of 50 mN / m”, a solution was used, where the solution was prepared by adding 3.75 μl of POE sorbitan monolaurate (trade name “Rheodol Super TW-L120,” manufactured by Kao Corporation to 100 g of deionized water) ), which is a nonionic surfactant, using a micropipette (trade name “ACURA 825”, manufactured by Socorex Isba SA) and bringing the surface tension to 50 ± 1 mN / m. In addition, the water solubility is measured by adding the agent at 0.0001 g. As a result, a sample that is observed to not dissolve even at 0.0001 g is considered “less than 0.0001 g”, and a sample that observed to dissolve at 0.0001 g, but not dissolve at 0.0002 g, is considered “0.0001 g”. Numerical values other than those given above are measured using the same methods.

<Component (D1)>

Straight chain POE lauryl ether (trade name “EMULGEN 109P,” manufactured by Kao Corporation)

(3) Preparation of a nonwoven fabric sample

The application liquid was applied to the entire surface from the side of the top layer of the nonwoven raw materials according to the flexographic printing method to obtain the nonwoven fabric sample in Example 1. The proportion (OPU) of the liquid film splitting agent and component (D1) were set as shown in Table 4. ...

{0113}

(Example 2)

A nonwoven sample in Example 2 was prepared in the same manner as in Example 1, except that the proportion of the liquid film splitting agent and component (D1) in the application liquid was set at 3: 2 (60:40) in terms of weight ratio, and the proportion (OPU) of the liquid film splitting agent and component (D1) are set as shown in Table 4.

{0114}

(Example 3)

A nonwoven sample in Example 3 was prepared in the same manner as in Example 1, except that the following material was used as component (D1).

<Component (D1)>

Straight chain alkyl (C ₁₁ -C ₁₄ ) ether POE · POP (trade name "EMULGEN LS-106", manufactured by Kao Corporation)

{0115}

(Example 4)

A nonwoven sample in Example 4 was prepared in the same manner as in Example 1, except that the following material was used as component (D1).

<Component (D1)>

Straight chain alkyl ether (C ₁₁ -C ₁₄ ) POE · POP ether (trade name "EMULGEN LS-110", manufactured by Kao Corporation)

{0116}

(Example 5)

The nonwoven fabric sample in Example 5 was prepared in the same manner as in Example 1, except that the following material was used as component (D1).

<Component (D1)>

Straight chain alkyl ether (C ₁₁ -C ₁₄ ) POE · POP ether (trade name "EMULGEN LS-114", manufactured by Kao Corporation)

{0117}

(Example 6)

The nonwoven fabric sample in Example 6 was prepared in the same manner as in Example 1, except that the following fabric was used as component (D1).

<Component (D1)>

POE · POP – modified silicone (trade name “KF6012”, manufactured by Shin – Etsu Chemical Co., Ltd.)

{0118}

(Example 7)

The nonwoven fabric sample in Example 7 was prepared in the same manner as in Example 1, except that the following material was used as component (D1).

<Component (D1)>

Straight chain POE lauryl ether (trade name “EMULGEN 106”, manufactured by Kao Corporation)

{0119}

(Example 8)

The nonwoven fabric sample in Example 8 was prepared in the same manner as in Example 1, except that the following fabric was used as component (D1).

<Component (D1)>

Simple alkyl sec- (C ₁₁ -C ₁₅ ) POE ether (trade name “EMULGEN 705”, manufactured by Kao Corporation)

{0120}

(Example 9)

A nonwoven sample in Example 9 was prepared in the same manner as in Example 1, except that the following material was used as component (D1).

<Component (D1)>

Simple alkyl sec- (C ₁₁ -C ₁₅ ) POE ether (trade name “EMULGEN 707”, manufactured by Kao Corporation)

{0121}

(Example 10)

A nonwoven sample in Example 10 was prepared in the same manner as in Example 1, except that the following material was used as component (D1).

<Component (D1)>

Simple alkyl sec- (C ₁₁ -C ₁₅ ) ether (trade name “EMULGEN 709”, manufactured by Kao Corporation)

{0122}

(Example 11)

The nonwoven sample in Example 11 was prepared in the same manner as in Example 1, except that the following material was used as component (D1).

<Component (D1)>

POE oleyl ether (trade name “EMULGEN 408”, manufactured by Kao Corporation)

{0123}

(Example 12)

The nonwoven sample in Example 12 was prepared in the same manner as in Example 2, except that the following liquid film splitting agent was used and the proportion (OPU) of the liquid film splitting agent and component (D1) was set as shown in Table 4.

<Liquid film splitting agent>

The material is an epoxy-modified dimethylsilicone (trade name “KF-101”, manufactured by Shin-Etsu Chemical Co., Ltd.), in which X in the X-Y structure is formed from a dimethylsilicone chain containing –Si (CH ₃ ) ₂ O -, Y is formed from an epoxy group containing - (RC ₂ H ₃ O) -, the modification ratio is 32% and the weight average molecular weight is 35800

Surface tension: 21.0 mN / m

Solubility in water: less than 0.0001g

Spreading coefficient on a liquid having a surface tension of 50 mN / m: 26.0 mN / m

Surface tension at the interface with a liquid having a surface tension of 50 mN / m: 3.0 mN / m

{0124}

(Example 13)

The nonwoven sample in Example 12 was prepared in the same manner as in Example 2 except that the following liquid film splitting agent was used.

<Liquid film splitting agent>

Caprylic / capric triglyceryl material (trade name “COCONARD MT,” manufactured by Kao Corporation) in which the Z in the Z – Y structure is * –O – CH (CH ₂ O– *) ₂ (* is the linking portion ), Y is formed from the hydrocarbon chain C ₈ H ₁₅ O– or C ₁₀ H ₁₉ O–, the fatty acid composition consists of 82% caprylic acid and 18% capric acid, and the weighted average molecular weight is 550

Surface tension: 28.9 mN / m

Solubility in water: less than 0.0001g

Spreading coefficient on a liquid having a surface tension of 50 mN / m: 8.8 mN / m

Surface tension at the interface with a liquid having a surface tension of 50 mN / m: 12.3 mN / m

(Example 14)

The coating liquid in Example 2 was mixed with potassium stearyl (C ₁₈ ) phosphate (product neutralized with potassium hydroxide, trade name “Gripper 4131,” manufactured by Kao Corporation) to prepare a dilute solution of 25 wt% in ethanol. The diluted solution is applied to nonwoven starting materials, the same as the material prepared in Example 1, using a flexo printing machine, and the resulting material is dried to prepare a nonwoven sample in Example 14, in which the agent is applied at 0.46% masses. The proportion (OPU) of the liquid film splitting agent, component (D1) and potassium stearyl (C ₁₈ ) phosphate was set as shown in Table 4.

(Example 15)

The coating liquid in Example 13 is mixed with potassium stearyl (C ₁₈ ) phosphate (product neutralized with potassium hydroxide, trade name “Gripper 4131,” manufactured by Kao Corporation) to prepare a dilute solution of 25 wt% in ethanol. The diluted solution is applied to the nonwoven starting materials the same as the material prepared in Example 1 using a flexo printing machine, and the resulting material is dried to obtain a nonwoven sample in Example 15, in which the agent is applied at 0.46 wt% ... The proportion (OPU) of the liquid film splitting agent, component (D1) and potassium stearyl (C ₁₈ ) phosphate was set as shown in Table 4.

{0125}

(Example 16)

The sample sanitary napkin in Example 16 was prepared in the same manner as in Example 12, except that the following liquid film splitting agent was used and the proportion (OPU) of the liquid film breaking agent and component (D1) was set as shown in Table 4.

<Liquid film splitting agent>

Polyoxypropylene (POP) is a modified dimethylsilicone, in which X in the X – Y structure is a dimethylsilicone chain containing SiOC ₂ H ₆ , Y is formed from a POP chain containing C ₃ H ₆ O, and the number of added moles of polyoxypropylene is 12, as liquid film splitting agent

Surface tension: 21.0 mN / m

Solubility in water: 0.025 g or less

Spreading coefficient on a liquid having a surface tension of 50 mN / m: 29.0 mN / m

Surface tension at the interface with a liquid having a surface tension of 50 mN / m: 0.5 mN / m

{0126}

(Example 17)

The sample sanitary napkin in Example 17 was prepared in the same manner as in Example 12, except that the following liquid film splitting agent was used and the proportion (OPU) of the liquid film splitting agent and component (D1) was set as shown in Table 4.

<Liquid film splitting agent>

POE - modified dimethylsilicone (trade name “SH3775M”, manufactured by Dow Corning Toray Co., Ltd.), in which X in the X – Y structure is a dimethylsilicone chain containing –Si (CH ₃ ) ₂ O–, Y is formed from the chain POE containing - (C ₂ H ₄ O) -, the terminal group of the POE chain is a methyl group (CH ₃ ), the modification ratio is 4%, the number of added moles of oxyethylene is 18 and the weight average molecular weight is 10800, as a cleavage agent liquid film

Surface tension: 17.0 mN / m

Solubility in water: less than 0.0001g

{0127}

(Example 18)

A nonwoven sample in Example 18 was prepared in the same manner as in Example 1, except that not component (D1) but the next component (D2) was used.

<Component (D2)>

Polyethylene glycol (PEG) (trade name “Polyethylene glycol 400”, manufactured by Wako Pure Chemical Corporation)

{0128}

(Example 19)

The nonwoven sample in Example 19 was prepared in the same manner as in Example 18, except that the proportion of the liquid film splitting agent and component (D2) in the application liquid was set at 7:13 (35:65), in terms of mass ratio, and the proportion (OPU) of the agent for breaking the liquid film and the component (D2) are set as shown in Table 5.

{0129}

(Example 20)

The nonwoven sample in Example 20 was prepared in the same manner as in Example 1, except that not component (D1) but the next component (D2) was used.

<Component (D2)>

POE · POP glycol (trade name “Pluronic L31,” manufactured by ADEK Corporation)

{0130}

(Example 21)

The nonwoven sample in Example 21 was prepared in the same manner as in Example 1, except that not component (D1) but the next component (D2) was used.

<Component (D2)>

POE · POP glycol (trade name “Pluronic L61,” manufactured by ADEK Corporation)

{0131}

(Example 22)

A nonwoven sample in Example 22 was prepared in the same manner as in Example 1, except that not component (D1) but the next component (D2) was used.

<Component (D2)>

POE · POP glycol (trade name “Pluronic L62,” manufactured by ADEK Corporation)

{0132}

(Example 23)

The nonwoven sample in Example 23 was prepared in the same manner as in Example 1, except that not component (D1) but a diamide compound of the next component (D3) was used.

<Component (D3)>

N''N-bis (3-methoxypropyl) isodoco acid diamide (manufactured by Kao Corporation)

{0133}

(Example 24)

A nonwoven sample in Example 24 was prepared in the same manner as in Example 23, except that the proportion of the liquid film splitting agent and the component (D3) in the application liquid was set at 90:10 in terms of the mass ratio, and the proportion the content (OPU) of the agent for breaking the liquid film and the component (D3) are set as shown in Table 6.

{0134}

(Example 25)

The nonwoven fabric sample in Example 25 was prepared in the same manner as in Example 23, except that the application liquid was prepared by adding component (D3) of Example 23 and component (D1) of Example 7 to the agent for disintegrating the liquid film of Example 1, when Herein, the mixing ratio of the agent for splitting the liquid film, component (D3) and component (D1) in the application liquid is set at 36: 2: 2 (90: 5: 5), in terms of the mass ratio and the ratio of the content (OPU) of the splitting agent liquid film, component (D1) and component (D3) are set as shown in Table 6.

{0135}

(Example 26)

(1) Method for preparing raw materials of nonwoven fabric

As the topsheet fibrous web, a topsheet fibrous web having a basis weight of 10 g / m ^{2 was} prepared using sheath-core fibers having a fineness of 1.2 dtex and formed from polyethylene terephthalate (PET) / polyethylene (PE). Then, a bottom layer fibrous web having a basis weight of 15 g / m ² is prepared using PET / PE sheath-core fibers having a fineness of 5.6 dtex.

Then, the topsheet fibrous web and the backsheet fibrous web are stacked on top of each other, and the resulting fabric is subjected to a dry-air forming treatment to obtain a non-woven fabric obtained by air-dry formation. From the resulting sample, a piece having dimensions of 400 mm × 140 mm was cut to prepare the nonwoven starting materials of Example 26.

(2) Preparation of the liquid for application

An application liquid is prepared in the same manner as in Example 1.

(3) Preparation of a nonwoven fabric sample

The nonwoven sample in Example 26 was prepared in the same manner as in Example 1 using the nonwoven starting materials and the application liquid described above.

{0136}

(Example 27)

A nonwoven sample in Example 27 was prepared in the same manner as in Example 26, except that component (D1) of Example 6 was used as component (D1).

{0137}

(Example 28)

The nonwoven sample in Example 28 was prepared in the same manner as in Example 26, except that the application liquid was prepared by adding component (D3) of Example 23 and component (D1) of Example 7 to the agent for disintegrating the liquid film of Example 1, when therein, the mixing ratio of the agent for splitting the liquid film, the component (D3) and the component (D1) in the application liquid is set at 36: 2: 2 (90: 5: 5) in terms of the mass ratio, and the ratio of the content (OPU) of the agent for the splitting of the liquid film, component (D1) and component (D3) are set as shown in Table 8.

{0138}

(Comparative example 1)

The same fabric as the nonwoven starting materials prepared in Example 1 was prepared as the nonwoven fabric sample in Comparative Example 1.

{0139}

(Comparative example 2)

The same fabric as the nonwoven starting materials prepared in Example 24 was prepared as the nonwoven fabric sample in Comparative Example 2.

{0140}

(Reference example 1)

Nonwoven sample in Reference Example 1 was prepared in the same manner as in Example 1 except that the applied agent to cleave a liquid film that does not contain components (D1) - (D3), with a proportion of the contents (OPU) 0,4% masses in relation to the mass of the nonwoven material.

{0141}

(Reference example 2)

A nonwoven sample in Reference Example 2 was prepared in the same manner as in Example 24, except that a liquid film splitting agent containing no components (D1) to (D3) was applied at a content ratio (OPU) of 0.4% by mass. in relation to the weight of the nonwoven fabric.

{0142}

In addition, in each of Examples, Comparative Examples, and Reference Examples, fibers, fibers to which a fiber treating agent is preliminarily applied in the step fiber preparation is used in the fibers of the nonwoven starting materials described above. The fiber treatment agent contains a water-soluble surfactant.

In each Example, the above application liquid (an agent obtained by mixing a water-repelling agent for disintegrating a liquid film and one or more components selected from components (D1) to (D3) at a predetermined proportion) is applied overhead as an outer coating. That is, as shown in FIG. 1 (B), the fiber treating agent is applied as the intermediate layer 7, and the application liquid is applied as the mixed layer 5, and both are on the outermost fiber layer. Component (D1) has a specific structure (straight chain POE nonionic surfactant) and a specific melting point (15 ° C or higher and 22 ° C or lower), while component (D1) is a compound that is difficult to dissolve in water and difficulty in reducing surface tension. In particular, component (D1) is, as in Example 6 or the like, a silicone-based surfactant in which the amount of added moles of oxyalkylene in the POA group is 30 mol or more and the amount of added moles of oxyethylene in the POE group is greater than the number of added moles of oxypropylene in the POP group, while component (D1) is a compound that has additional difficulties in dissolving in water and additional difficulties in reducing the surface tension. Component (D2) is water-soluble, but not a surfactant and has a structure containing only a hydrophilic group (PEG or PPG), and therefore component (D2) is a material structurally and functionally different from a fiber treating agent. Component (D3) is a compound that is insoluble in water and has properties similar to oil containing no hydrophilic groups, and therefore component (D3) is an excellent material for treating fibers in both structure and properties.

{0143}

(Research method)

[1] Changes in the surface tension of a bodily fluid

Based on the above (Method for measuring the percentage of reduction in surface tension of a bodily fluid), the changes in the surface tension of a bodily fluid under the action of the components (D1) - (D3) used in each Example were examined. In addition, this test uses a test fluid having a surface tension of 49 mN / m.

{0144}

[2] The amount of residual liquid in the nonwoven sample

(1) Regarding Examples 1 to 25, Comparative Example 1 and Referential Example 1:

Remove the topsheet from the sanitary napkin (trade name “LAURIER F,” Shiawase Suhada, 22.5cm, manufactured by Kao Corporation 2016), each nonwoven sample is laminated as a topsheet so that the topsheet is on top, the periphery of the sanitary napkin is fixed , and the sanitary napkin is taken as a sample of the sanitary napkin for evaluation.

On the surface of each sample of a sanitary napkin, an acrylic plate having an opening for liquid penetration with an inner diameter of 1 cm is placed on top, and a predetermined load of 100 Pa is placed on the sanitary napkin. Under such a load, 6.0 g of quasi-blood (prepared by bringing the defibrinated horse cut produced by NIPPON BIO-TEST LABORATORIES INC. To 8.0 cP) of the corresponding menstrual blood is poured onto it from the acrylic plate penetration hole. In addition, the quasi-blood used was prepared with a TVB-10 Viscometer manufactured by Toki Sangyo Co., Ltd. under conditions of 30 rpm. When defibrinated horse blood is allowed to stand, the high viscosity part (red blood cells or the like) settles, and the low viscosity part (plasma) remains as supernatant. The mixing ratio of the parts is adjusted to obtain 8.0 cps. In 60 seconds after pouring 6.0 g of quasi-blood as a whole on it, the acrylic plate is removed from it. Then measure the mass (W2) of the nonwoven sample, calculate the difference (W2 – W1) with the mass (W1) of the nonwoven sample, the mass of which is measured in advance, before pouring quasi-blood on it. The operation described above is carried out 3 times, and the average value for 3 times is taken as the amount of residual liquid (mg). The amount of residual liquid serves as an indication of how much the user's skin is wetted, and when the amount of residual liquid is lower, the effect of reducing the amount of residual liquid is increased.

(2) Regarding Examples 26-28, Comparative example 2 and Referential example 2:

In the study, an absorbent material taken from Merries (registered trade name) Pants Type M Size Diaper (manufactured in 2018) manufactured by Kao Corporation was used as the absorbent to be laminated on each nonwoven sample by spraying a cold spray over the diaper. to cure the adhesive.

Draw a square having a size of 7 cm × 7 cm, with the injection point as the center, on the nonwoven sample to be measured as the object of measurement.

The injection point of the nonwoven fabric sample and the center of the above-described absorbent body are aligned, and in a state in which the nonwoven fabric sample is placed on the absorbent body, a load of 20 g / cm ^{2 is} uniformly applied. A cylinder having a cross-sectional area of 1000 mm ² was placed substantially in the center of the test mass, and 40 g of synthetic urine was passed through the nonwoven fabric therefrom at a speed of 5.0 g / sec four times at an interval of 10 minutes from the start of injection. After a total of 160 g has been injected, the sample is allowed to stand for 10 minutes.

Then, the nonwoven fabric was cut with a razor along a 7 cm × 7 cm square drawn thereon in advance, and the mass (W4) of the resulting fabric was measured. Then, the nonwoven fabric was placed in a dryer at 100 ° C and essentially dried, and then the weight (W3) of the resulting fabric was measured again. The quantity mass (W4) - mass (W3) is taken as the amount of residual liquid. The above operation is carried out 3 times, and the average of 3 times is taken as the amount of residual liquid (mg).

The introduction of the artificial urine into the nonwoven fabric 10 is carried out using a liquid injection pad (MCP-J, manufactured by ISMATEC SA), after being brought with a silicone tube of the liquid outlet assembly to a point 10 mm above the nonwoven fabric placed on the absorbent mass.

The amount of 160 g to be administered is based on the assumption of an average child's excretion. In addition, the rate of administration of 5.0 g / sec is based on the assumption of the rate of urine excretion during excretion by the child.

{0145}

[3] Length of flow of liquid (flow of liquid over the surface) on the surface of the nonwoven fabric

(1) Regarding Examples 1 to 25, Comparative Example 1 and Referential Example 1:

Prepare the same material as the evaluation sanitary napkin used in section [2] (1).

As a research tool, a tool is used having a placement unit in which the surface for placing the test sample is inclined 45 ° relative to the horizontal surface. Each sanitary napkin sample is placed on a placement unit with the nonwoven sample facing up. On the surface of each sample of sanitary napkin add 0.5 g of quasi-blood dropwise at a rate of 0.1 g / sec. The distance from the spot at which the liquid first hits the nonwoven fabric to the spot where the test liquid is sucked into the nonwoven fabric and does not flow further therethrough is measured. In addition to this, the quasi-blood to be used is selected in the same manner as in section [2] (1). The operation described above is carried out 3 times, and the average of the measured values for 3 times is taken as the flow length of the liquid (mm). The flow length of the liquid is an indication of the extent to which the liquid flows on the surface without being absorbed into the test specimen, and this liquid flows easily during wear, and the shorter flow length of the liquid gives a higher rating.

(2) Regarding Examples 26-28, Comparative example 2 and Referential example 2:

In a state in which a nonwoven sample is placed on the same absorbent body as the absorbent body in section [2] (2), an injection point is drawn in the center of the absorbent body, and the sloped surface is prepared at 30 °, and the absorbent body is fixed on an acrylic plate so as to prevent displacement of the sample, and artificial urine prepared in the same manner as in section [2] (2) is injected at the injection point at a rate of 5.0 g / sec.

At this time, the distance the artificial urine flows from the injection point on the surface of the nonwoven fabric is taken as the flow distance of the liquid. The operation described above is carried out 3 times and the average of the 3 measured values is taken as the length of flow of the liquid (mm).

{0146}

The results of each study with respect to Examples, Comparative Examples and Reference Examples described above are shown in the following Tables 4-9. In addition, for the nonwoven fabric samples in Examples 1 to 28, as shown in FIG. 1 (A), it was confirmed that the mixed layer of the liquid film splitting agent and one or more components selected from components (D1), (D2) and (D3), is formed on the outermost layer (on the surface) of the fibers.

{0147}

Table 4

Example 1 Example 2 Example 3 Example 4 Example 5 Example 6 Liquid film splitting agent POE (3) - modified silicone POE (3) - modified silicone POE (3) - modified silicone POE (3) - modified silicone POE (3) - modified silicone POE (3) - modified silicone Weighted average molecular weight 4000 4000 4000 4000 4000 4000 Content ratio with respect to the mass of nonwoven fabric (% mass) 0.30 0.24 0.30 0.30 0.30 0.30 Viscosity 163 163 163 163 163 163 Component (D1) POE (9) lauryl ether POE (9) lauryl ether POE (6) POP (1,5) alkyl ether POE (10) POP (1,5) alkyl ether POE (14) POP (1,5) alkyl ether POE (43) POP (41) - modified silicone Weighted average molecular weight 582 582 About 540 About 720 About 890 14400 Content ratio with respect to the mass of nonwoven fabric (% mass) 0.10 0.16 0.10 0.10 0.10 0.10 Melting point (° C) 20 20 –6 one eleven <0 Foam height after shaking the aqueous solution of the component (D1) (mm) 15 15 eighteen 17 15 12 HLB 13.6 13.6 12.5 13.4 14.0 7.0 Mass ratio of component (D1) / liquid film splitting agent 0.33 0.67 0.33 0.33 0.33 0.33 Anionic surfactant of the phosphoric acid ester type - - - - - - Content ratio with respect to the mass of nonwoven fabric (% mass) - - - - - - Surface tension of bodily fluid (mN / m) 42.4 42.3 38.6 39.8 41.4 41.8 Percentage of reduction in surface tension of bodily fluid (%) 13.5 13.7 21.2 18.8 15.5 14.7 Residual liquid amount (mg) 91 85 137 133 114 110 Liquid flow length at surface (mm) 29 35 39 36 26 51

Table 4 (continued)

Example 7 Example 8 Example 9 Example 10 Example 11 Example 12 Liquid film splitting agent POE (3) - modified. silicone POE (3) - modified. silicone POE (3) - modified. silicone POE (3) - modified. silicone POE (3) - modified. silicone Epoxy - modified. silicone (Sc: 26) Weighted average molecular weight 4000 4000 4000 4000 4000 35800 Content ratio with respect to the mass of nonwoven fabric (% mass) 0.30 0.30 0.30 0.30 0.30 0.24 Viscosity 163 163 163 163 163 1,515 Component (D1) POE (5) lauryl ether simple POE (5) alkyl
sec - (C ₁₁ -C ₁₅ ) ether simple POE (7) alkyl
sec - (C ₁₁ -C ₁₅ ) ether simple POE (9) alkyl
sec - (C ₁₁ -C ₁₅ ) ether POE (8) oleyl ether POE (9) lauryl ether Weighted average molecular weight 406 About 430 About 520 610 620 582 Content ratio with respect to the mass of nonwoven fabric (% mass) 0.10 0.10 0.10 0.10 0.10 0.16 Melting point (° C) 6 –27 –3 8 thirteen 20 Foam height after shaking the aqueous solution of the component (D1) (mm) 15 12 15 15 14 15 HLB 10.5 10.5 12.1 13.6 10.0 13.6 Mass ratio of component (D1) / liquid film splitting agent 0.33 0.33 0.33 0.33 0.33 0.67 Anionic surfactant of the phosphoric acid ester type - - - - - - Content ratio with respect to the mass of nonwoven fabric (% mass) - - - - - - Surface tension of bodily fluid (mN / m) 41.0 39.0 39.5 37.0 40.5 42.3 Percentage of reduction in surface tension of bodily fluid (%) 16.3 20.4 19.4 24.5 17.3 13.7 Residual liquid amount (mg) 112 132 132 142 120 138 Liquid flow length at surface (mm) 38 45 40 46 48 29

“Sc” stands for spreading coefficient.

Table 4 (continued)

Example 13 Example 14 Example 15 Example 16 Example 17 Liquid film splitting agent Caprylic / Capric Triglyceryl POE (3) - modified silicone Caprylic / Capric Triglyceryl POP (12) - modified dimethylsilicone POE (18) - modified dimethylsilicone Weighted average molecular weight 550 4000 550 8000 10800 Content ratio with respect to the mass of nonwoven fabric (% mass) 0.24 0.24 0.24 0.30 0.30 Viscosity 24.1 163 24.1 250 1,722 Component (D1) POE (9) lauryl ether POE (9) lauryl ether POE (9) lauryl ether POE (9) lauryl ether POE (9) lauryl ether Weighted average molecular weight 582 582 582 582 582 Content ratio with respect to the mass of nonwoven fabric (% mass) 0.16 0.16 0.16 0.10 0.10 Melting point (° C) 20 20 20 20 20 Foam height after shaking the aqueous solution of the component (D1) (mm) 15 15 15 15 15 HLB 13.6 13.6 13.6 13.6 13.6 Mass ratio of component (D1) / liquid film splitting agent 0.67 0.67 0.67 0.33 0.33 Anionic surfactant of the phosphoric acid ester type - Potassium stearyl (C ₁₈ ) phosphate Potassium stearyl (C ₁₈ ) phosphate - - Content ratio with respect to the mass of nonwoven fabric (% mass) - 0.06 0.06 - - Surface tension of bodily fluid (mN / m) 42.3 43.2 42.8 42.4 42.4 Percentage of reduction in surface tension of bodily fluid (%) 13.7 11.8 12.6 13.5 13.5 Residual liquid amount (mg) 121 80 110 103 122 Liquid flow length at surface (mm) thirty 29 28 22 22

{0148}

Table 5

Example 18 Example 19 Example 20 Example 21 Example 22 Liquid film splitting agent POE (3) - modified silicone POE (3) - modified
silicone POE (3) - modified
silicone POE (3) - modified
silicone POE (3) - modified
silicone Weighted average molecular weight 4000 4000 4000 4000 4000 Content ratio with respect to the mass of nonwoven fabric (% mass) 0.30 0.14 0.30 0.30 0.30 Viscosity 163 163 163 163 163 Component (D2) PEG PEG POE (3) POP (17) glycol POE (5) POP (35) glycol POE (10) POP (65) glycol Weighted average molecular weight 400 400 1136 2268 4228 Number of POE moles added 9 9 3 five ten Content ratio with respect to the mass of nonwoven fabric (% mass) 0.10 0.26 0.1 0.1 0.1 Melting point (° C) about 6 about 6 <0 <0 <0 Surface tension (mN / m) 42.8 42.8 46.9 43.5 42.8 Mass ratio of component (D2) / liquid film splitting agent 0.33 1.86 0.33 0.33 0.33 POP / POE polymerization ratio (ratio of added moles) 0.00 0.00 5.67 7.00 6.50 Surface tension of bodily fluid (mN / m) 42.4 42.4 43.5 42,7 43.3 Percentage of reduction in surface tension of bodily fluid (%) 13.5 13.5 11.2 12.9 11.6 Residual liquid amount (mg) 83 97 90 80 72 Liquid flow length at surface (mm) 55 29 34 45 fifty

{0149}

Table 6

Example 23 Example 24 Example 25 Liquid film splitting agent POE (3) - modified silicone POE (3) - modified silicone POE (3) - modified silicone Weighted average molecular weight 4000 4000 4000 IOB value 0.61 0.61 0.61 Content ratio relative to the weight of the nonwoven fabric
(% mass) 0.30 0.36 0.36 Viscosity 163 163 163 Component (D3) N''N-bis (3-methoxypropyl) isodoco acid diamide N''N-bis (3-methoxypropyl) isodoco acid diamide N''N-bis (3-methoxypropyl) isodoco acid diamide Weighted average molecular weight about 500 about 500 about 500 Content ratio relative to the weight of the nonwoven fabric
(% mass) 0.10 0.04 0.02 Melting point (° C) 60 60 60 IOB value 0.81 0.81 0.81 Component (D1) - - POE (5) lauryl ether Weighted average molecular weight - - 406 Content ratio relative to the weight of the nonwoven fabric
(% mass) - - 0.02 Melting point (° C) - - 6 Mass ratio (component (D3) + component (D1)) / liquid film splitting agent 0.33 0.11 0.11 Surface tension of bodily fluid (mN / m) 41.8 42.3 41.9 Percentage of reduction in surface tension of bodily fluid (%) 14.7 13.7 14.4 Residual liquid amount (mg) 81 72 65 Liquid flow length at surface (mm) 48 48 36

{0150}

Table 7

Example 26 Example 27 Liquid film splitting agent POE (3) - modified silicone POE (3) - modified silicone Weighted average molecular weight 4000 4000 Content ratio with respect to the mass of nonwoven fabric (% mass) 0.30 0.30 Viscosity 163 163 Component (D1) POE (9) lauryl ether POE (43) POP (41) - modified silicone Weighted average molecular weight 582 14400 Content ratio with respect to the mass of nonwoven fabric (% mass) 0.10 0.10 Melting point (° C) 20 <0 Foam height after shaking the aqueous solution of the component (D1) (mm) 15 12 HLB 13.6 7.0 Mass ratio of component (D1) / liquid film splitting agent 0.33 0.33 Surface tension of bodily fluid (mN / m) 34.9 36.8 Percentage of reduction in surface tension of bodily fluid (%) 32.3 28.7 Residual liquid amount (mg) 48 40 Liquid flow length at surface (mm) 34 27

{0151}

Table 8

Example 28 Liquid film splitting agent POE (3) - modified silicone Weighted average molecular weight 4000 IOB value 0.61 Content ratio with respect to the mass of nonwoven fabric (% mass) 0.36 Viscosity 163 Component (D3) N''N-bis (3-methoxypropyl) isodoco acid diamide Weighted average molecular weight About 500 Content ratio with respect to the mass of nonwoven fabric (% mass) 0.02 Melting point (° C) 60 IOB value 0.81 Component (D1) POE (5) lauryl ether Weighted average molecular weight 406 Content ratio with respect to the mass of nonwoven fabric (% mass) 0.02 Melting point (° C) 6 (Component (D3) + Component (D1)) / Liquid film splitting agent 0.11 Surface tension of bodily fluid (mN / m) 38.1 Percentage of reduction in surface tension of bodily fluid (%) 26.2 Residual liquid amount (mg) 46 Liquid flow length at surface (mm) 37

{0152}

Table 9

Comparative example 1 Comparative example 2 Reference example 1 Referential
example 2 Liquid film splitting agent - - POE (3) - modified silicone POE (3) - modified silicone Weighted average molecular weight - - 4000 4000 Content ratio relative to the weight of the nonwoven fabric
(% mass) - - 0.40 0.40 Viscosity - - 163 163 Surface tension of bodily fluid (mN / m) 43.0 35.9 43.0 35.9 Percentage of reduction in surface tension of bodily fluid (%) 12.2 30.4 12.2 30.4 Residual liquid amount (mg) 269 162 89 fifty Liquid flow length at surface (mm) 28 70 62 37

{0153}

As shown in Tables 4-9, in Comparative Example 1, which did not contain agents for breaking the liquid film, the amount of residual liquid was 269 mg. In contrast, in Examples 1 to 25, the amount of residual liquid was suppressed to about half to about one third of that in Comparative Example 1, and effective splitting of the liquid film was confirmed. In addition, while the amount of the residual liquid is 162 mg in Comparative Example 2, where it does not contain an agent for splitting the liquid film, in Examples 26-28, the amount of residual liquid is suppressed to the extent of from half to about one third of the amount in Comparative Example 2, and effective splitting of the liquid film was confirmed. As described above, Examples 1-28 result in a high impact of reducing the amount of residual liquid in the liquid film splitting agent.

On the other hand, in Reference Examples 1 and 2, only the liquid film splitting agent is contained and none of the components (D1) to (D3) is contained. For this reason, the flow length of the liquid on the surface of the nonwoven fabric in Comparative Examples is shorter.

In contrast, in Examples 1 to 28, they contain an agent for cleaving the liquid film and one or more components selected from components (D1), (D2) and (D3), and therefore the length of the liquid flow on the surface of the nonwoven fabric is suppressed by lower than Reference Examples 1 and 2. In addition, in Examples 1 to 28, the surface tension of the test liquid (corresponding to the bodily fluid) that passes through the nonwoven sample is maintained at a comparable level as in Comparative Examples 1 and 2 and Reference examples 1 and 2. That is, in Examples 1 to 28, even if it contains components (D1) to (D3) that make the nonwoven fabric hydrophilic, the decrease in the surface tension of the research liquid is suppressed, and since the proportion of the decrease in the surface tension is lower , the action of the agent for splitting the liquid film is developed, and the amount of the residual liquid is suppressed at a low level.

As described above in Examples 1 to 28, both the improvement in reducing the amount of residual liquid and the improvement in the anti-spreading properties are realized simultaneously.

{0154}

Having described the present invention in connection with these embodiments, aspects and Examples, it is the intention of the authors that the present invention is not limited to any details of the description unless otherwise indicated, but rather should be taken within its spirit and scope, as set forth in the attached claims.

{0155}

This application claims the priority of Patent Application No. 2017-119147, filed in Japan on June 16, 2017, which is incorporated herein by reference in its entirety.

Description of symbols

{0156}

1 Fiber

5 Mixed layer

7 Intermediate layer.

Claims (30)

1. Nonwoven fabric for an absorbent article containing one or more compounds selected from the following compound (C1) and the next compound (C2), and one or more components selected from the following components (D2) and (D3): (C1) a compound having a spreading coefficient of 15 mN / m or more and 50 mN / m or less on a liquid having a surface tension of 50 mN / m and a water solubility of 0 g or more and 0.025 g or less; and (C2) a compound having a spreading coefficient greater than 0 mN / m and 50 mN / m or less on a liquid having a surface tension of 50 mN / m, a water solubility of 0 g or more and 0.025 g or less, and an interfacial tension more than 0 mN / m and 20 mN / m or less on a liquid having a surface tension of 50 mN / m; and (D2) a compound having a surface tension of 42 mN / m or more and 60 mN / m or less, consisting of a structure containing a hydrophilic group, wherein the structure containing a hydrophilic group includes a structure containing a polyoxyethylene group or a structure containing a block copolymer from a polyoxyethylene group and a polyoxypropylene group; and (D3) bis-methoxypropylamidoisodocosane. 2. Nonwoven material for an absorbent article containing one or more compounds selected from the following compound (C1) and the next compound (C2-1); and the next component (D1); where component (D1) is soluble in water, and when component (D1) is immersed in water for 20 minutes to prepare a 2.5 wt% aqueous solution of component (D1), the foam height estimated according to the following (Method for measuring foam height after shaking the aqueous solution of component (D1)), is 10 mm or more and 20 mm or less; (C1) a compound having a spreading coefficient of 15 mN / m or more and 50 mN / m or less on a liquid having a surface tension of 50 mN / m and a water solubility of 0 g or more and 0.025 g or less; (D1) a nonionic surfactant having an HLB value of 10 or more and 20 or less and a melting point of 10 ° C or more and less than 25 ° C; (C2-1) a compound having a spreading coefficient greater than 10 mN / m and 50 mN / m or less on a liquid having a surface tension of 50 mN / m, a water solubility of 0 g or more and 0.025 g or less, and a surface tension at the interface an interface greater than 0 mN / m and 20 mN / m or less on a liquid having a surface tension of 50 mN / m and a melting point of -220 ° C or more and 40 ° C or less; and (Method for measuring foam height after shaking the aqueous solution of component (D1)) First, 0.2 g of the component (D1) is weighed, poured into a screw cap vial (No. 4, outer diameter: 24 mm, total length: 53 mm, manufactured by Maruem Co., Ltd.), and then poured into it 8 , 0 g of deionized water, and then the resulting mixture is allowed to stand for 20 minutes to sufficiently dissolve the component in deionized water to prepare an aqueous solution; after vigorously shaking the vial with the threaded cap up and down twice, the vial with the threaded cap is placed directly on the horizontal plane; after 10 seconds have elapsed from the time immediately after shaking, measure the height of the structured layer (the height from the liquid level of the liquid layer to the upper surface of the structured layer in which air is retained) of the aqueous solution; this height is taken as the foam height after shaking the aqueous solution of component (D1). 3. Nonwoven fabric according to claim 1, wherein component (D2) contains one or more components selected from polyoxyethylene glycol and a copolymer of polyethylene glycol and polypropylene glycol. 4. Nonwoven fabric according to any one of claims 1 to 3, additionally containing an anionic surfactant of an ester of phosphoric acid. 5. Nonwoven fabric according to any one of claims 1 to 4, where the mass ratio of the total amount of components (D1), (D2) and (D3) to the total amount of compound (C1), (C2) and (C2-1) (total weight components (D1), (D2) and (D3) / the total weight of the compound (C1), (C2) and (C2-1)) is 0.25 or more and 9 or less. 6. A nonwoven fabric according to any one of claims 1 to 5, wherein the total amount of components (D1), (D2) and (D3) is 0.06 mass% or more and 3 mass% or less based on the mass of the nonwoven fabric. 7. Absorbent article containing a nonwoven material according to any one of claims 1-6. 8. An agent for treating fibers containing one or more compounds selected from the following compound (C1) and the next compound (C2), and one or more components selected from the following components (D2) and (D3); (C1) a compound having a spreading coefficient of 15 mN / m or more and 50 mN / m or less on a liquid having a surface tension of 50 mN / m and a water solubility of 0 g or more and 0.025 g or less; and (C2) a compound having a spreading coefficient greater than 0 mN / m and 50 mN / m or less on a liquid having a surface tension of 50 mN / m, a water solubility of 0 g or more and 0.025 g or less, and an interfacial tension more than 0 mN / m and 20 mN / m or less on a liquid having a surface tension of 50 mN / m; and (D2) a compound having a surface tension of 42 mN / m or more and 60 mN / m or less, consisting of a structure containing a hydrophilic group, wherein the structure containing a hydrophilic group includes a structure containing a polyoxyethylene group or a structure containing a block copolymer from a polyoxyethylene group and a polyoxypropylene group; and (D3) bis-methoxypropylamidoisodocosane. 9. An agent for treating fibers containing one or more compounds selected from the next compound (C1) and the next compound (C2-1); and the next component (D1); where component (D1) is soluble in water, and when component (D1) is immersed in water for 20 minutes to prepare a 2.5 wt% aqueous solution of component (D1), the foam height estimated according to the following (Method for measuring foam height, given in claim 2, after shaking the aqueous solution of the component (D1)) is 10 mm or more and 20 mm or less; (C1) a compound having a spreading coefficient of 15 mN / m or more and 50 mN / m or less on a liquid having a surface tension of 50 mN / m and a water solubility of 0 g or more and 0.025 g or less; and (D1) a nonionic surfactant having an HLB value of 10 or more and 20 or less and a melting point of 10 ° C or more and less than 25 ° C; (C2-1) a compound having a spreading coefficient of 10 mN / m or more and 50 mN / m or less on a liquid having a surface tension of 50 mN / m, a water solubility of 0 g or more and 0.025 g or less, and a surface tension of the interface is greater than 0 mN / m and 20 mN / m or less on a liquid having a surface tension of 50 mN / m and a melting point of -220 ° C or more and 40 ° C or less. 10. An agent for treating fibers according to any one of claims 8, 9, further comprising an anionic surfactant of an ester of phosphoric acid. 11. The agent for treating fibers according to any one of claims 8 to 10, wherein the mass ratio of the total amount of components (D1), (D2) and (D3) to the total amount of compound (C1), (C2) and (C2-1) ( the total weight of the components (D1), (D2) and (D3) / the total weight of the compound (C1), (C2) and (C2-1)) is 0.25 or more and 9 or less.

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