JP3297340B2 - Paper products - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The present invention is, smoothness and moist feeling, there is no sticky feeling superior to feel resistance, the present invention relates to the optimal paper products <br/> to household paper such as Te I shea Yupepa and toilet paper .

[0002]

2. Description of the Related Art As a first prior art for enhancing the tactile sensation of paper products, there is known a method in which a cationic surfactant softener is internally added to a pulp raw material and adsorbed. Further, as a second conventional technique, Japanese Patent Laid-Open Publication No. Hei 3-900,
As described in Japanese Patent No. 224626, there is a method of giving a soft and silky flannel-like feel to tissue paper using a silicone softener. Furthermore,
As a third prior art, Japanese Patent Laid-Open Publication No.
As described in No. 6596, a method of impregnating a fibrous web with a moisturizing softener such as salts having hygroscopicity, polyhydric alcohols and saccharides, and a water-sizing paste to improve flexibility and moisturizing properties is known. is there. As a fourth prior art, as described in Japanese Patent Application Laid-Open Nos. 62-87117 and 4-15021 concerning paper products for cleaning and wiping, low-density tissue paper and water-disintegrable paper are oiled. There is a method of improving the wiping property by impregnating with a material.

[0003]

In the first prior art described above, since the lipophilic group of the cationic surfactant is oriented outward, the hydrogen bonding between the fibers of the pulp raw material is hindered. As a result, there is a problem that the fiber bonding strength is reduced, the falling off of the fiber is increased, and the paper dust is increased. In addition, the lipophilic base gives the paper water repellency, and impairs the water absorption required for household paper such as tissue paper and toilet paper. In addition, the cationic surfactant type softener cannot be added in a large amount because of the problem of safety, and a sufficient softening effect cannot be obtained.

According to the second prior art, the flexibility is insufficient and the texture is poor, and the addition of a high-concentration softener has a problem in safety.

[0005] In the third prior art, the moisturizing softener is based on the plasticizing action of pulp by moisture as its basic principle, so that it is possible to obtain an excellent softening effect. A moisturizing component is required and the amount of addition is inevitably increased, resulting in an increase in cost. In addition, a change in moisture content due to a change in environmental humidity and a change in tactile sensation associated therewith are inevitable.

[0006] The fourth prior art is mainly intended to improve the wiping property, and thus has problems such as poor flexibility and soft touch, sticky feeling, and poor water absorption.

The present invention has been made in view of the above-described prior arts, and an object of the present invention is to provide a paper product which does not lower the strength or generate paper dust and does not inhibit water absorption. It is in. Another object of the present invention is to provide a paper product that requires a small amount of a processing solution, is low in manufacturing cost, is not easily affected by environmental changes, and can stably maintain a favorable tactile sensation such as smoothness and moistness. Is to do. Another object of the present invention is to provide a paper product which does not have an oily feeling represented by a sticky feeling and has high safety.

[0008]

Means for Solving the Problems In order to solve the above-mentioned problems, the paper product of the present invention comprises a base paper such as tissue paper or toilet paper, which contains at least one of hydrocarbons, vegetable oils, waxes and higher alcohols. seen containing an oil-like substances, and a water-soluble wax, further, as fatty acids, fatty acids, fatty
Salt or glycerin fatty acid ester
And the fatty acids are stearic acid, palmitic acid, myris
Wherein the fatty acid salt comprises the above fatty acid
Of sodium, potassium, triethanolamine, diee
Contains salts of tanolamine and monoethanolamine.
The glycerin fatty acid ester
Serine monofatty acid ester or diglycerin fatty acid ester
It comprises steal .

Here, the paper product of the present invention may be used in a wet state before drying the web in the papermaking, or in a dry base paper after the papermaking, one of hydrocarbons, vegetable oils, waxes and higher alcohols. It is manufactured by an external addition method of impregnating a treatment liquid containing the above oil substances, a water-soluble wax, fatty acids, and if necessary, water as a solubilizer. Specific examples of the external addition method include spraying a processing liquid on a wet web in papermaking, spraying a processing liquid on a dried base paper after papermaking, and applying a processing liquid to a basepaper by a gravure printing roll. And immersing the base paper in a treatment liquid.

[0010] The hydrocarbons as the above-mentioned oil substances include liquid paraffin, squalane, etc., the vegetable oils include olive oil, camellia oil, castor oil, soybean oil, etc., and the waxes include beeswax, carnauba wax and lanolin. And higher alcohols such as cetanol, stearyl alcohol, and oleyl alcohol. The treatment liquid used in the present invention includes these hydrocarbons, vegetable oils,
What is necessary is just to contain at least one or more of waxes and higher alcohols. As the water-soluble wax, polyethylene glycol having an average molecular weight of 1,000 or more and 20,000 or less is preferably used. This polyethylene glycol has a melting point of 30 ° C. or higher and exhibits a solid at room temperature.

In the present invention, the base paper is impregnated by the external addition method using the lipophilic substance and the hydrophilic solid substance in combination as described above.
Unlike the first prior art method using a cationic surfactant type softener, there is no restriction of ionicity, and the lipophilic group does not coat the cellulose fiber, so that the hydrogen bonding of the fiber is not hindered. Also, there is little decrease in strength and generation of paper dust. At the same time, while retaining the moist feeling without impairing the water absorption, the sticky oily feeling is eliminated. Furthermore, it is possible to obtain a desirable textured touch only by impregnating a relatively small amount of the processing liquid.

Further, the above-mentioned fatty acids are contained in the treatment liquid.
To improve the smoothness and obtain an excellent tactile sensation
be able to. This tactile enhancement effect can be
Amino-modified, epoxy-modified, carboxes
Sil-modified, polyether-modified silicone oil,
Or treat one or more of dimethylpolysiloxane, etc.
It can also be obtained by adding to a liquid.

Further, the processing solution may further contain a humectant.
Better moist feeling for better touch
You. This humectant includes glycerin, diglycerin, average
Polyethylene glycol having a molecular weight of 200 or more and less than 1000
, Sorbitol, propylene glycol, 1,3-butyrate
Len glycol, glycine betaine, pyrrolidone carb
Acid, pyrrolidone carboxylate, maltitol, lactate
Including one or more of thorium and the like.

The treatment liquid further contains a nonionic surfactant,
One or more of an amphoteric surfactant and an anionic surfactant can be contained as necessary. These surfactants are used to homogenize the mixed state of oils, fatty acids, and silicones, or to compensate for a decrease in water absorption. As nonionic surfactants, polyoxyethylene alkyl ether, polyoxyethylene alkyl phenyl ether, polyoxyethylene castor oil ether,
Polyoxyethylene fatty acid ester, sorbitan fatty acid ester, polyoxyethylene sorbitan fatty acid ester, polyoxyethylene lanolin alcohol ether,
There are polyoxyethylene polyoxypropylene condensate, sucrose fatty acid ester, alkyl alkanolamide, etc., as amphoteric surfactants, alkyl betaine, alkyl amide betaine, etc., and as anionic surfactant, alkyl sulfate, Examples include polyoxyethylene alkyl ether sulfate, polyoxyethylene alkyl ether phosphoric acid, polyoxyethylene alkyl phenyl ether phosphoric acid, and the like.

[0015] The paper product of the present invention is preferably composed of :-solution A: 0.01 to 5 parts by weight of liquid paraffin;
0.001 to 2 parts by weight of activator, as a water-soluble wax
Polyethylene having an average molecular weight of 1,000 or more and 20,000 or less
Glycol in an amount of 0.01 to 5 parts by weight, and glycerin in 0.1 part by weight.
1 to 15 parts by weight and 0.1 to 25 parts by weight of water
Liquid, & solution B: more amino-modified or polyether solution A
Solvent containing 0.01 to 5% by weight of modified silicone oil
Liquid, and when, (1) the treatment liquid I: stearic acid to the solution A 0.01 to 2
Parts by weight of the processing liquid, or, (2) treating solution II: stearic acid to the solution B 0.01 to 2
Parts by weight and triethanolamine in an amount of from 0.005 to 1.0
The base paper may be impregnated with a treatment solution containing a fatty acid salt in parts by weight . When the content of the processing solution with respect to the base paper is too small, the effect of improving the tactile sensation does not occur. On the contrary, when the content is too large, the effect is saturated and uneconomical. It is better to make
When the content was 1 to 30% by weight, remarkable improvements in tactile sensation such as smoothness, moist feeling, and softness were observed, and sufficient values were obtained for strength, water absorption, and slip resistance.

The treatment liquid used in the present invention is preferably further added with a trace amount of a fungicide such as paraoxybenzoate.

Further, if the components of the treatment liquid used in the present invention are selected from food additives or substances used for cosmetics, safety can be improved.

The improvement in the tactile sensation of the paper product of the present invention is based on a softening effect based on plasticization of fibers by increasing the water content, as described in the above-mentioned third prior art, Japanese Patent Application Laid-Open No. 5-156596. The amount of addition is smaller than that of the one, which contributes to cost reduction. At the same time, it is less susceptible to environmental changes such as the humidity of the outside air, and can maintain a stable tactile sensation.

[0019]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. 80% NBKP (softwood craft bleached pulp), LBKP (hardwood craft bleached pulp)
20% pulp containing 620-630ml freeness
(CSF), and an epoxy resin (paper strength agent WS-500: manufactured by Nippon PMC) was internally added as a wet strength agent in an amount of 0.15% to pulp, and the basis weight was 13.0 g / m ² , the crepe rate. 18% tissue paper base paper was made.

Next, the components shown in Tables 1 and 2 were dissolved and mixed to prepare a treatment liquid, and the dried base paper which had been stacked on two sheets was applied using a gravure printing roll and impregnated. In addition, as a method of external addition, a treatment liquid may be sprayed on a wet web in papermaking, a treatment liquid may be sprayed on a dried base paper after papermaking, or a basepaper may be immersed in the treatment liquid. The numerical values in Tables 1 and 2 are% by weight per pulp (base paper). Comparative Example 1 in Table 2 is untreated tissue paper.

[0021]

[Table 1]

[0022]

[Table 2]

The following drugs were used for each drug in Tables 1 and 2.・ Liquid paraffin: “Christol 70” (trade name, manufactured by Esso Oil Co., Ltd.) ・ Polyethylene glycol 4000: Asahi Denka Kogyo Co., Ltd.
Product name "ADEKA PEG-4000"-Polyethylene glycol 20000: Product name "ADEKA PEG-20,000" manufactured by Asahi Denka Kogyo Co., Ltd.-Glycerin: Product name "food supplemented glycerin" manufactured by Asahi Denka Kogyo Co., Ltd.-Sorbit: JP Ken Chemical Co., Ltd. product name "Sorbitol FP" Stearic acid: Asahi Denka Kogyo Co., Ltd. product name "ADEKA FATTY ACID SA-910" Triethanolamine: Mitsui Toatsu Chemical Co., Ltd. product name "Triethanol" Amine ”・ Glycerin monofatty acid ester: Daiichi Kogyo Seiyaku Co., Ltd.
Product name "MG powder" (fatty acid composition: stearic acid 60-70%, palmitic acid 20-30%) Polyether-modified silicone: product name "Silicone KF-352A" manufactured by Shin-Etsu Chemical Co., Ltd.-Amino-modified silicone : Shin-Etsu Chemical Co., Ltd. product name "Silicone X-51-1023"-Polyoxyethylene lanolin alcohol ether: Daiichi Kogyo Seiyaku Co., Ltd. product name "Lamigen ET-70"-Paraoxybenzoic acid ester: Ueno Pharmaceutical Co., Ltd. “Neo plating” manufactured by Co., Ltd.

Next, the base paper impregnated with the treatment liquid was allowed to stand still at a humidity of 65 ± 10% and a temperature of 20 ± 5 ° C. for 20 hours, processed into tissue paper, and subjected to the following measurement. Table 3 shows the test results of Examples 1 to 5 and Reference Examples 1 to 4, and Table 4 shows the test results of Comparative Examples 1 to 7.

[0025]

[Table 3]

[0026]

[Table 4]

The contents of each test item in Tables 3 and 4 are as follows:
It is as follows. 1) Tensile strength In accordance with the tensile strength test of tissue paper specified in JIS S-3104, the transverse strength of the dried paper was measured. The measurement was performed ten times, and the average value was obtained. In addition,
According to the JIS standard, it is required to be 0.78 N or more.

2) Water absorption Measured according to the water absorption test of tissue paper specified in JIS S-3104. The measurement was performed five times, and the average value was obtained. The JIS standard requires that the time be 8 seconds or less.

3) Flexibility A handle ometer (manufactured by Kumagai Riki Kogyo) was used as a test device. Two samples (one set) are taken to a size of 10 × 10 cm and pushed into a gap having a width of 0.25 inch (about 6.35 mm) to measure the resistance at that time. The pushing was performed with the short side of the gap aligned with the longitudinal direction of the paper. The measurement was performed five times, and the average value was obtained. In addition, the degree of flexibility indicates that the smaller the numerical value, the softer.

4) Friction test A friction tester (KES-SE4) was used as a test device.
(Manufactured by Kato Tech) was used. The surfaces of two samples (one set) are traced by a friction element to determine a friction coefficient (MIU) and a variation in friction coefficient (MMD). Friction element load is 50
g, and the moving speed was 1 mm / sec. Where MIU
Indicates that the smaller the numerical value is, the easier it is to slide, and the smaller the numerical value is, the smoother the MMD is. The measurement was performed 10 times and the average value was obtained.

5) Sensory Test As an evaluation of the touch, a sensory evaluation was conducted by 10 panelists for oiliness, smoothness, and moistness. Each evaluation method is as follows. -Oiliness: Number of panelists who felt oiliness-Smoothness: 1 for "Very smooth", 2 for "Smooth", 3 for "Slightly smooth", and "No smoothness" Is set to 4, and an arbitrary position on the scale is marked.・ Moist feeling ... "I'm very moist."
Mark “2” for “moist”, “3” for “slightly moist”, and “4” for “not moist” and mark any position on the scale.・ Comprehensive evaluation: Mark “1” for “very good”, “2” for “good”, “3” for “good”, and “4” for poor. Attached. The numerical values in Tables 3 and 4 are average values of 10 panelists.

As is clear from Tables 3 and 4, each of Examples 1 to 5 has a small decrease in strength and a small decrease in water absorption.
Both the strength and the water absorption show values exceeding the JIS standard. Regarding the degree of flexibility, in Examples 2, 4 , and 5 , better softness was obtained than in all the comparative examples. Regarding the feeling of friction, particularly with respect to MMD, numerical values lower than those of the comparative examples were obtained in all the examples, and the smoothness was improved. In the sensory test, none of the panelists felt oiliness in each of the examples, and both the smoothness and the moistness were evaluated to be higher than those of the comparative examples. In addition, as a comprehensive evaluation, in the comparative example, it is distributed in a range of 3.0 to 3.8 (a range from “slightly good touch” to “not good touch”), but in Examples, it is 1.2 to 3.8. 2. 7 (a range from “very good touch” to “somewhat good touch”), and a high evaluation was obtained for the tactile sensation.

FIG. 1 shows an embodiment of the present invention., Reference examples,Comparative example
The friction characteristics of Are Examples 1 toFigure 5
I to IV in Reference Examples 1 to 4And 1 to 7 in the figure represent comparative examples.
Each is shown. FIG. 2 shows an embodiment of the present invention.,three
Case study,The frictional characteristics of the comparative examples were compared with the comprehensive evaluation of the sensory test.
The figures in the figure are the sensory tests in Tables 3 and 4.
It is a numerical value of the overall evaluation of the experiment. From Figure 2, the preferred tactile sensation is
There is an optimum region for the friction coefficient and its variation,
Little movement (smooth) and high coefficient of friction
(The less slippery) has a higher overall rating. Departure
According to the embodiment of the present invention, the preferred tactile area as compared with the comparative example
It is clear that this is achieved.

The present invention can be applied to tissue paper, toilet paper, paper towels, and other paper products that come into direct contact with the skin.

As described above, according to the present invention, by adding an oil substance , a water-soluble wax, and a fatty acid to the base paper, a paper product having a relatively smooth and moist feeling with a relatively small addition amount can be obtained. Thus, a paper product having physical strength and water absorption characteristics equal to or higher than JIS standards can be realized. At the same time, the flexibility of the paper product is high, and there is no unpleasant oiliness due to stickiness or the like. Moreover, humectants coconut recone such, the combined use of such surfactants can have more excellent touch. Furthermore, there is an advantage that it is hardly affected by an environmental change and a stable tactile sensation can be maintained, and it can be manufactured at low cost because the amount of the processing liquid added is small. In particular, if a food additive or a substance for cosmetics is used, high safety can be obtained. In this onset bright, for impregnating the treating solution by the outer addition method in the base paper, the occurrence of reduced strength and paper dust of the paper product is less than the method of internal addition of cationic surfactant type softening agent, The water absorption is not inhibited.

[Brief description of the drawings]

FIG. 1 is a diagram showing friction characteristics of Examples , Reference Examples, and Comparative Examples of the present invention.

FIG. 2 is a diagram showing friction characteristics of Examples , Reference Examples, and Comparative Examples of the present invention together with comprehensive evaluation by a sensory test.

Claims (5)

(57) [Claims] To 1. A base paper, hydrocarbons, vegetable oils, waxes, viewed including the one or more oil-like substances of higher alcohols, and a water-soluble wax, further, as fatty acids, fatty acids, fatty acid salts, glycerol
Fatty acid esters containing at least one fatty acid , wherein the fatty acid is stearic acid, palmitic acid, myristine
Acid and lauric acid, wherein the fatty acid salt is
Thorium, potassium, triethanolamine, dietano
Including the salts of ethanolamine and monoethanolamine.
The glycerin fatty acid ester is glycerin of the above fatty acid.
Mono or diglycerin fatty acid ester
A paper product comprising: 2. The paper product according to claim 1, wherein the hydrocarbons include liquid paraffin and squalane, and the vegetable oils include olive oil, camellia oil, castor oil and soybean oil,
Waxes include beeswax, carnauba wax and lanolin, higher alcohols are cetanol, stearyl alcohol,
The water-soluble wax contains oleyl alcohol and has an average molecular weight of 1,000 or more and 20,000.
A paper product characterized by the following polyethylene glycol. 3. The paper product according to claim 1, wherein the humectant further comprises glycerin, diglycerin, polyethylene glycol having an average molecular weight of 200 to less than 1,000, sorbit, propylene glycol, 1,3-butylene glycol, and glycine betaine. A paper product comprising one or more of, pyrrolidone carboxylic acid, pyrrolidone carboxylate, maltitol, and sodium lactate. 4. The paper product according to claim 1, wherein the silicone is amino-modified, epoxy-modified,
Carboxyl-modified, port Rieteru modified modified silicone
A paper product comprising one or more of oil and dimethylpolysiloxane . 5. The paper product according to claim 1, further comprising a nonionic surfactant, an amphoteric surfactant.
A paper product comprising one or more of a surfactant and an anionic surfactant .