CN115337148A - Absorption core body and sanitary product - Google Patents

Abstract

The invention relates to an absorption core body and a sanitary product, comprising: the diffusion absorption layer, the middle layer and the anti-seepage absorption layer are sequentially stacked; the diffusion absorption layer is a non-woven fabric layer, and the fiber section of the diffusion absorption layer is arranged in a multi-leaf shape; the anti-seepage absorption layer is a sectional type hollow viscose fiber non-woven fabric. The absorption core body adopts the composite core body, overcomes the defects that the wood pulp core body is too thick and is easy to break and rise, combines the advantages of quick instant liquid capture of the wood pulp core body, air permeability and softness of the existing composite core body and the like, improves the defects of poor temporary liquid capture capability, poor diffusion performance and the like of the existing composite core body, greatly improves the multiple liquid absorption capability of a product, obviously improves the diffusivity of the absorption core body, improves the utilization rate and the dryness and comfort of the core body, and has better absorption performance and anti-reverse osmosis performance.

Description

Absorption core body and sanitary product

Technical Field

The invention relates to the technical field of sanitary products, in particular to an absorption core body and a sanitary product.

Background

In the field of sanitary products, such as disposable absorbent products like diapers, sanitary napkins, panty liners, and breast pads, etc., the disposable absorbent products are widely used due to their advantages of convenience, hygiene, comfort, etc., and have very high quality standards, while the absorbent core is the core of the disposable absorbent product and is a determining factor for determining the quality of the sanitary product. Diapers, sanitary napkins and the like as products for absorbing excreta or body fluids rely primarily on their absorbent cores for the absorption and storage of fluids. There are two main types of absorbent cores currently on the market: one is a fluff pulp core body, wherein wet strength paper or hydrophilic non-woven fabric wraps fluff pulp and super absorbent resin, the instantaneous liquid capturing capacity of the fluff pulp core body is excellent, but the fluff pulp core body is easy to deform and slide after absorbing liquid, so that the fluff pulp core body is piled up and easily breaks layers. The other type is a composite core body which is composed of two layers of non-woven materials, a fluffy non-woven fabric in the middle layer and two layers of super absorbent resin materials, the composite core body overcomes the defects that a wood pulp core body is too thick and easy to break, the instant liquid capturing capability of the composite core body is poor due to lack of diffusivity, and simultaneously, gel is blocked due to water absorption and expansion of the super absorbent resin, so that a downward seepage channel is blocked, liquid leakage occurs, the utilization rate of the core body is low, and the liquid is difficult to diffuse all around.

Therefore, the technical problem to be solved by those skilled in the art is how to improve the structure of the absorbent core in the prior art, meet different requirements of different users, improve the liquid absorption capacity of the absorbent core, and improve the comfort and pleasure of the wearer.

Disclosure of Invention

Therefore, it is necessary to provide an absorbent core and a sanitary product for solving the problems of the prior art that the absorbent core is easy to deform and slide after absorbing liquid, resulting in lump formation and fault formation, or lacking in diffusibility, poor liquid capturing capability, easy to cause liquid leakage, and low core utilization rate.

An absorbent core comprising: the diffusion absorption layer, the middle layer and the anti-seepage absorption layer are sequentially stacked; the diffusion absorption layer is a non-woven fabric layer, and the fiber section of the diffusion absorption layer is arranged in a multi-leaf shape; the anti-seepage absorption layer is a sectional type hollow viscose fiber non-woven fabric.

In one embodiment, the segmented hollow viscose non-woven fabric has hollow sections and solid sections arranged alternately.

In one embodiment, the grammage of the segmented hollow viscose nonwoven fabric ranges from 25gsm to 50gsm; further, the gram weight range of the segmented hollow viscose non-woven fabric is 30gsm-40gsm; alternatively, the segmented hollow viscose nonwoven fabric has a grammage of 30gsm.

In one embodiment, the diffusion absorption layer has a trefoil-shaped fiber cross section.

In one embodiment, the fiber section of the diffusion absorption layer comprises a plurality of blades arranged at intervals in a divergent mode, one ends of the blades are connected into a whole, and the other ends of the blades have arc-shaped radians.

In one embodiment, the grammage of the diffusion absorbent layer ranges from 25gsm to 50gsm; further, the grammage of the diffusion absorption layer ranges from 30gsm to 40gsm; alternatively, the grammage of the diffusion absorbent layer is 30gsm.

In one embodiment, the middle layer is a fluffy non-woven fabric layer, and a high water absorption material is added to the middle layer.

In one embodiment, the superabsorbent material is a superabsorbent resin.

In one embodiment, the super absorbent resin is arranged on the surface layer and the bottom layer of the middle layer.

In one embodiment, an adhesive is arranged between the diffusion absorption layer and the middle layer and between the middle layer and the anti-seepage absorption layer.

In one embodiment, a high water absorption material is arranged between the diffusion absorption layer and the middle layer and between the middle layer and the anti-seepage absorption layer; or super absorbent resin is arranged between the diffusion absorption layer and the middle layer and between the middle layer and the anti-seepage absorption layer.

The technical scheme also provides a hygienic product which comprises a liquid permeable surface layer, a liquid-repellent bottom layer and the absorption core body as described in any one of the above items; the absorption core body is arranged between the liquid permeable surface layer and the liquid-repellent bottom layer.

The beneficial effects of this technical scheme include at least:

this technical scheme absorb the core and adopt the composite core, overcome the wood pulp core too thick, the easy broken layer plays the shortcoming that sticks together to the advantages such as ventilative gentle that have combined the instantaneous liquid of catching of wood pulp core to reach current composite core. Specifically, the diffusion absorption layer of the absorption core body of the technical scheme is a surface layer and is made of spunlace viscose fibers with multi-leaf fiber sections, capillary channels can be formed on the cross sections of the multi-leaf fibers, high-efficiency liquid diffusion efficiency is achieved, the effect of rapid absorption and diffusion is achieved, liquid can be rapidly absorbed and conducted, meanwhile, the back-permeation amount of materials is reduced, the amount of liquid in contact with the skin of a user is reduced, the reduction of the integral back-permeation amount of products is facilitated, the dryness of the products in the using process is kept, the defects that the existing composite core body is poor in temporary liquid capturing capacity and poor in diffusion performance and the like are overcome, the multiple liquid absorption capacity of the products is greatly improved, the diffusivity of the absorption core body is remarkably improved, and the utilization rate and the dryness of the core body are improved. Simultaneously, this technical scheme's barrier layer is the bottom, adopt sectional type cavity viscose fiber non-woven fabrics, the hollow structure of sectional type is fibre part cavity promptly, the part is solid, hollow portion improves compressive capacity, prevent reverse osmosis, solid portion improves the absorptive capacity, thereby make the bottom liquid retention nature strong, not only can reach spacing inside storage liquid between the fibre, even exert pressure to the absorption core, liquid still can remain inside the fibre, can upwards reverse osmosis to the top layer, thereby reduce the core and return the infiltration volume, help keeping the product dry and comfortable, have better absorption performance concurrently and prevent reverse osmosis performance.

According to the hygienic product adopting the technical scheme, one side of the absorption core body, which is close to the liquid permeable surface layer, is the side where the diffusion absorption layer is located, and one side of the absorption core body, which is close to the lyophobic bottom layer, is the side where the anti-seepage absorption layer is located. When the sanitary product according to the technical scheme is worn, the liquid-permeable surface layer is used for being in direct contact with the skin of a human body, liquid penetrates into the diffusion absorption layer of the absorption core body through the liquid-permeable surface layer, and then is guided into the middle layer and the anti-seepage absorption layer step by step through the diffusion absorption layer, so that the sanitary product has good absorption performance and anti-seepage performance.

Drawings

Fig. 1 is a schematic cross-sectional view of an absorbent core of an embodiment of the invention.

Reference numerals: 10. a diffusion absorption layer; 11. a blade; 20. an intermediate layer; 21. a superabsorbent material; 30. an impervious absorbent layer; 31. a hollow portion; 32. a solid portion.

Detailed Description

In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein.

An absorbent core as shown in figure 1, comprising: the diffusion absorption layer 10, the middle layer 20 and the seepage-proofing absorption layer 30 are sequentially stacked; the diffusion absorption layer 10 is a non-woven fabric layer, and the cross section of the fibers of the diffusion absorption layer 10 is arranged in a multi-leaf shape; the impermeable absorption layer 30 is a sectional hollow viscose non-woven fabric.

This embodiment absorb core adopts compound core, has overcome the wood pulp core too thick, the easy disconnected layer shortcoming that sticks together to combine the wood pulp core instant catch liquid fast and the ventilative gentle advantage of waiting of current compound core. Specifically, the diffusion absorption layer 10 of the absorption core of the embodiment is a surface layer and is made of spunlace viscose fibers with multi-leaf fiber sections, the cross sections of the multi-leaf fibers can form capillary channels, so that high liquid diffusion efficiency is realized, a rapid absorption and diffusion effect is achieved, liquid can be rapidly absorbed and conducted, the back-permeation amount in materials is reduced, the amount of liquid in contact with the skin of a user is reduced, the reduction of the overall back-permeation amount of a product is facilitated, the dryness of the product in the using process is maintained, the defects of poor temporary liquid capturing capability, poor diffusion performance and the like of the existing composite core are overcome, the multiple liquid absorption capability of the product is greatly improved, the diffusivity of the absorption core is remarkably improved, and the utilization rate and the dryness of the core are improved. Meanwhile, the impermeable layer of the embodiment is a bottom layer, a sectional hollow viscose non-woven fabric is adopted, the sectional hollow structure is a hollow fiber part, and is partially solid, the hollow part 31 improves the pressure resistance and prevents reverse osmosis, and the solid part 32 improves the absorption capacity, so that the liquid retention of the bottom layer is strong, liquid can be stored between fibers and in the limiting interior, even if pressure is applied to the absorption core body, the liquid can still be kept in the fibers and cannot upwards reversely permeate to the surface layer, the core body reverse osmosis amount is reduced, the product is kept dry and comfortable, and the waterproof and impermeable composite material has better absorption performance and reverse osmosis prevention performance.

In the sectional hollow viscose fiber non-woven fabric according to the embodiment, the hollow sections and the solid sections of the fiber are arranged in a staggered manner or at intervals, so that the liquid absorption capacity and the seepage-proofing capacity of the seepage-proofing absorption layer 30 are balanced as much as possible. For example, in the segmented hollow viscose non-woven fabric, including the state of folding fibers and fibers, the hollow sections and the solid sections are arranged adjacently (staggered) or more than one other hollow sections are arranged between the hollow sections and the solid sections, so that the anti-seepage absorption layer 30 has both the hollow part 31 and the solid part 32 in a certain local same cross section, and thus, the local part can not only rapidly capture liquid through the solid sections, but also store liquid through the hollow sections and resist pressure and reverse seepage.

The gram weight range of the sectional type hollow viscose fiber non-woven fabric is 30gsm-40gsm; the impermeable absorption layer 30 in the gram weight range has the advantages of impermeable absorption performance and manufacturing cost, fast liquid absorption, good liquid storage capacity and comfort and lightness of wearing of a user. Preferably, the segmented hollow viscose nonwoven has a grammage of 30gsm.

The fiber section of the diffusion absorption layer 10 according to this embodiment includes a plurality of blades 11 arranged at intervals in a divergent manner, one ends of the plurality of blades 11 are connected integrally, and the other ends of the plurality of blades 11 have an arc-shaped arc. The fiber cross section of the diffusion absorption layer 10 is in a trilobal shape, the fiber cross section of the embodiment includes three blades 11 uniformly arranged at intervals in a divergent shape, one ends of the three blades 11 are connected into a whole, and the other ends of the three blades 11, namely the free ends, can be arranged to have an arc radian, so that the stress concentration of the free ends of the blades 11 is reduced, the structural strength of the blades 11 is increased, and the hand feeling of the diffusion absorption layer 10 is also made softer.

In other embodiments, other fibers having radially multi-lobal cross-sections may be used, such as a four-lobal cross-section, a five-lobal cross-section, and the like.

The grammage range of the diffusion absorption layer 10 in the embodiment is 30gsm-40gsm, and the diffusion absorption layer 10 in the grammage range has both diffusion absorption performance and manufacturing cost, and simultaneously guarantees breathability, bulkiness and comfort of wearing of a user. Preferably, the grammage of the diffusion absorption layer 10 of the present embodiment is 30gsm.

This embodiment the intermediate level 20 is fluffy non-woven fabrics layer, has advantages such as fluffy degree height, elasticity are good, soft handle, ventilative water permeability are good, just intermediate level 20 still adds super absorbent material 21, and super absorbent material 21 is through fluffy non-woven fabrics parcel promptly, has further strengthened fluffy non-woven fabrics's imbibition ability, and when the water conservancy diversion diffusion that liquid passes through diffusion absorbing layer 10 entered into intermediate level 20, can be fast absorbed by super absorbent material 21 who wraps up in fluffy non-woven fabrics, promotes the imbibition ability of intermediate level 20 greatly.

Preferably, the super absorbent material 21 is super absorbent resin, the super absorbent resin is safe and nontoxic, has hydrophilic groups such as hydroxyl group and carboxyl group, can absorb a large amount of water and swell, can keep the water from flowing out, and can absorb the water more than 100 times of the volume of the resin, and the highest water absorption rate can reach more than 1000 times. Further, the resin has a cross-linked structure and is not dissolved into a solution upon interaction with water.

The super absorbent resin of the embodiment is added on the surface layer and the bottom layer of the middle layer 20, that is, the super absorbent resin is added on the surfaces of the middle layer 20 close to the diffusion absorption layer 10 and the anti-seepage absorption layer 30, so that the performance of quickly capturing liquid and the overall bulkiness and dryness of the product can be better ensured.

In the present embodiment, an adhesive is provided between the diffusion absorption layer 10 and the intermediate layer 20, and between the intermediate layer 20 and the impermeable absorption layer 30, and the layers are bonded by the adhesive.

In addition, in order to improve the liquid absorption capacity of the absorbent core of the present embodiment, the high water absorbent material 21 is provided between the diffusion absorbent layer 10 and the intermediate layer 20, and between the intermediate layer 20 and the barrier absorbent layer 30, which is advantageous for improving the water absorption rate and the water absorption speed and reducing the reverse osmosis amount.

Preferably, the super absorbent resin is disposed between the diffusion absorption layer 10 and the intermediate layer 20, and between the intermediate layer 20 and the barrier absorption layer 30, and once the super absorbent resin absorbs enough moisture, the super absorbent resin forms a swollen gel, which has a strong water retention capacity, and is not easily extruded even under pressure, thereby further improving the reverse osmosis performance.

In addition, adsorption particles can be added into the absorption core body, for example, activated carbon particles can be added, and the activated carbon particles are uniformly distributed in the absorption core body. The adsorption particles can be arranged in any one or more layers of the diffusion absorption layer, the middle layer and the anti-seepage absorption layer. The arrangement of adding the adsorption particles can absorb the peculiar smell generated by the absorption core body after absorbing body liquid, and the comfort and pleasure of a user are improved.

The present embodiment also provides a sanitary article, in particular a disposable sanitary article, which may be a diaper, a sanitary napkin, a panty liner, a spill proof pad or the like, comprising a liquid permeable top layer and a liquid repellent bottom layer, and an absorbent core as defined in any of the above; the absorption core body is arranged between the liquid permeable surface layer and the liquid-repellent bottom layer.

The lyophobic bottom layer is a liquid-tight layer, and liquid leakage to the outside is prevented. The lyophobic bottom layer can be a degradable waterproof film and can be a film structure prepared by mixing polylactic acid and polybutylene adipate terephthalate. Wherein, the polylactic acid has higher modulus and tensile strength, but lower elongation at break and poorer toughness; polybutylene adipate terephthalate has better softness and toughness, but lower modulus and tensile strength. The film structure prepared by mixing polylactic acid and poly (butylene adipate terephthalate) has multiple advantages of high modulus, high strength, high elongation at break, high toughness and the like, is biodegradable, safe, environment-friendly and sustainable, so that the lyophobic bottom layer can bear the expansion pressure caused by the expansion of the absorption core body after absorbing liquid in the using process of the sanitary product, the liquid can be prevented from leaking to the outside, and clothes, bed sheets and the like are prevented from being stained.

Or, lyophobic bottom can be by at least one deck through the degradable non-woven fabrics of hydrophobic processing and constitute, can not only reach the antiseep effect, can also bring soft sense of touch.

Specifically, one side of the absorption core body, which is close to the liquid-permeable surface layer, is the side where the diffusion absorption layer is located, and one side of the absorption core body, which is close to the lyophobic bottom layer, is the side where the anti-seepage absorption layer is located. When the sanitary product is worn, the liquid-permeable surface layer is used for being in direct contact with the skin of a human body, liquid penetrates into the diffusion absorption layer of the absorption core body through the liquid-permeable surface layer, and then is led into the middle layer and the anti-seepage absorption layer step by step through the diffusion absorption layer.

The liquid-permeable surface layer can be a non-woven fabric layer, can also be provided with an embossing structure, and can also be provided with printing with different colors and different shapes, thereby improving the interest and the aesthetic feeling of the product.

Example one

The present embodiment will be described with reference to the first embodiment in which the sanitary article is a diaper. The diaper is wet including preceding waist, back waist, and connects the crotch portion of preceding waist and back waist, pass through liquid surface course, dredge the liquid bottom to and locate the liquid surface course and dredge the composite construction that the absorption core between the liquid bottom formed and locate at least crotch portion position, and preceding waist or back waist still are equipped with and are used for carrying out magic subsides or magic buckle etc. fixed to the diaper. The magic tape or the magic buckle can be arranged to have elasticity, so that the magic tape or the magic buckle has contractibility, thereby being suitable for infants with different body types and better fitting the waist and hip parts of the infants at the moment of use.

The left side edge and the right side edge of the crotch part are provided with elastic leg bands which can be realized by embedding elastic bands and the like. The elastic legs are used for tightly enclosing the root of the thigh, so that the edge of the diaper is tightly attached to the body of a user, and the effect of preventing leakage is further achieved.

The diaper according to the present embodiment includes a pant-type diaper.

Example two

In the present embodiment, a sanitary product is described as an example two. The sanitary towel comprises a sanitary towel body, a back glue layer arranged on the back surface of the sanitary towel body, and release paper covering the back glue layer. The sanitary towel comprises a sanitary towel body and a plurality of protective wings, wherein the sanitary towel body comprises a middle crotch and the protective wings are arranged on two opposite sides of the middle crotch and are used for fixing the sanitary towel. The composite structure formed by the liquid permeable surface layer, the lyophobic bottom layer and the absorption core body arranged between the liquid permeable surface layer and the lyophobic bottom layer is arranged at the middle crotch part, and the gum layer can be arranged at the outer side of the lyophobic bottom layer.

In addition, when the absorbent core is used in a sanitary napkin, a traditional Chinese medicine layer can be added in the sanitary napkin, and the position of the traditional Chinese medicine layer can be selected according to specific requirements, such as the traditional Chinese medicine layer can be arranged in the absorbent core, and can also be arranged between the absorbent core and the liquid-permeable surface layer. The Chinese medicinal layer is mainly used for removing odor and relieving dysmenorrhea or other discomfort symptoms during menstrual period, and can be folium Artemisiae Argyi, etc.

The absorbent core of the present embodiment is also applicable to a pants-type sanitary napkin. In the present invention, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may be directly contacting the second feature or the first and second features may be indirectly contacting each other through intervening media. Also, a first feature "on," "above," and "over" a second feature may be directly on or obliquely above the second feature, or simply mean that the first feature is at a higher level than the second feature. A first feature "under," "beneath," and "under" a second feature may be directly under or obliquely under the second feature, or may simply mean that the first feature is at a lesser elevation than the second feature. It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like as used herein are for illustrative purposes only and do not denote a unique embodiment.

The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that various changes and modifications can be made by those skilled in the art without departing from the spirit of the invention, and these changes and modifications are all within the scope of the invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims (10)

1. An absorbent core, comprising: the diffusion absorption layer, the middle layer and the anti-seepage absorption layer are sequentially stacked; the diffusion absorption layer is a non-woven fabric layer, and the fiber section of the diffusion absorption layer is arranged in a multi-leaf shape; the anti-seepage absorption layer is a sectional type hollow viscose fiber non-woven fabric.

2. The absorbent core of claim 1 wherein the segmented hollow viscose nonwoven fabric has a grammage in the range of 30gsm to 40gsm; alternatively, the segmented hollow viscose nonwoven fabric has a grammage of 30gsm.

3. The absorbent core as claimed in claim 1, wherein the fiber cross-section of the diffusion absorption layer comprises a plurality of blades arranged at intervals in a divergent manner, one end of the plurality of blades is integrally connected, and the other end of the plurality of blades has an arc-shaped radian.

4. The absorbent core of claim 1 wherein the grammage of the diffusion absorbent layer ranges from 30gsm to 40gsm; alternatively, the grammage of the diffusion absorption layer is 30gsm.

5. The absorbent core of claim 1 wherein said intermediate layer is a lofty nonwoven layer and said intermediate layer further incorporates a superabsorbent material.

6. An absorbent core according to claim 5, characterized in that said superabsorbent material is a superabsorbent resin.

7. An absorbent core according to claim 6, wherein the superabsorbent resin is provided in the top and bottom layers of the intermediate layer.

8. An absorbent core according to any of claims 1 to 7, wherein an adhesive is provided between the diffusing absorbent layer and the intermediate layer, and between the intermediate layer and the barrier absorbent layer.

9. The absorbent core according to any of claims 1-7, wherein a superabsorbent material is disposed between the diffusive absorbent layer and the intermediate layer, and between the intermediate layer and the impervious absorbent layer; or super absorbent resin is arranged between the diffusion absorption layer and the middle layer and between the middle layer and the anti-seepage absorption layer.

10. A sanitary article comprising a liquid-permeable top layer and a liquid-repellent bottom layer, and an absorbent core according to any of claims 1-9; the absorption core body is arranged between the liquid permeable surface layer and the liquid-repellent bottom layer.

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