JP2022026331A - Body fluid absorbing article - Google Patents

Abstract

To provide a body fluid absorbing article including a surface material which is excellent in abrasion resistance, hard to break at use, and excellent in spot liquid absorption of body fluid.SOLUTION: A body fluid absorbing article comprises a surface material 1, a liquid absorbing body 3 and a leakage preventing material 4 arranged in the order from a body fluid exudation side. The surface material 1 has cotton fibers as the constituent fibers, and comprises a nonwoven fabric in which cotton fiber intervals are entangled. The nonwoven fabric is applied with cationized starch and an oil solution. There are used as for the oil solution: an oil solution containing lipophilic mono stearic acid glyceryl, and polyoxyethylene lauryl ether; an oil solution containing stearic acid amide and a hardened tallow oil; or an oil solution containing stearic acid amide and a palm oil. An application amount of the cationized starch is 3-5 wt.% based on a nonwoven fabric weight, and an application amount of the oil solution is 0.3-1.5 wt.% based on the nonwoven fabric weight. The liquid absorbing body 3 comprises an aggregate of pulp fibers, and the leakage preventing material 4 comprises a body fluid-impermeable synthetic resin film.SELECTED DRAWING: Figure 1

Description

The present invention relates to a body fluid-absorbing article such as a sanitary napkin or a disposable diaper.

Body fluid-absorbing articles such as sanitary napkins are arranged in the order of surface material, liquid-absorbing material, and leak-proof material from the body fluid exudation side. Since the surface material comes into direct contact with the skin, a non-woven fabric made of cellulosic fibers such as cotton fibers, which are soft to the touch, is used. The applicant has proposed a surface material to which stearic acid amide is added to the non-woven fabric in order to make the non-woven fabric more soft to the touch (Patent Document 1). Furthermore, the applicant has proposed a surface material obtained by applying a specific oil agent to a non-woven fabric so that the exuded body fluid can be absorbed in a spot manner (Patent Document 2).

Japanese Patent No. 5657916 Utility Model Registration No. 3224098

The present invention is an improved invention of the invention according to Patent Document 2, and the problem is that the body fluid absorption is provided with a surface material which is excellent in wear resistance, is not easily torn during use, and is excellent in spot liquid absorption property of body fluid. It is to provide sex goods.

The present invention solves the above-mentioned problems by using a surface material obtained by applying a cationized starch and a specific oil agent to a specific non-woven fabric. That is, the present invention is a body fluid-absorbing article in which the surface material 1, the liquid-absorbing material 3, and the leak-proof material 4 are arranged in this order from the body fluid-exuding side. An oil containing cationized starch, glyceryl monostearate and polyoxyethylene lauryl ether, an oil containing stearic acid amide and beef stearic acid hardening oil, and stearic acid amide and palm are added to the non-woven fabric in which the constituent fibers are entangled with each other. It relates to a body fluid-absorbing article characterized by being imparted with an oil agent selected from the group consisting of an oil agent containing oil.

The surface material 1 used in the present invention is made of a non-woven fabric containing cellulosic fibers as constituent fibers. As the cellulosic fiber, cotton fiber, rayon fiber or the like is used. In particular, among the cotton fibers, non-cotton wool is preferable because the cottonseed oil adhering to the surface of the cotton fibers makes it easy to absorb the exuded body fluid in a spot. As the rayon fiber, a short fiber having a fineness of 1 to 10 decitex and a fiber length of 10 to 100 mm is generally used, but a long fiber may be used. A small amount of fibers other than the cellulosic fibers may be mixed in the non-woven fabric.

Confounding fibers made of cellulosic fibers are entangled with each other. As a result, the constituent fibers are bonded to each other to form a non-woven fabric having a predetermined strength. As a method of entanglement, a water flow entanglement method is preferable. The basis weight of the nonwoven fabric used in the present invention is about 10 to 50 g / m ² .

In the present invention, in addition to the confounding bond between the constituent fibers, the cationized starch binds the constituent fibers to each other. Since the cationized starch easily adheres to the cellulosic fiber, the strength of the nonwoven fabric can be improved without adversely affecting the oil agent used in the present invention. Starch has a molecular weight of several thousand levels to several hundred million levels, but in the present invention, it is preferable to use starch having a molecular weight of several thousand levels to several hundred thousand levels. When tens of millions of levels of starch are used, the paste becomes highly viscous and difficult to apply to the non-woven fabric. Specifically, wheat starch, horse belly starch starch, corn starch, high amylose-containing corn starch, tapioca starch, rice starch, satoimo starch and the like are used. As the cationizing agent for cationizing these starches, conventionally known diethylaminoethyl chloride, 3-chloro-2-hydroxypropyltrimethylammonium chloride, 2,3-epoxypropyltrimethylammonium chloride and the like are used.

Further, a specific oil agent is added to the nonwoven fabric used in the present invention. As the specific oil, an oil containing lipophilic glyceryl monostearate and polyoxyethylene lauryl ether, an oil containing stearic acid amide and palm oil, or an oil containing stearic acid amide and hydrogenated beef tallow may be used alone or in combination. Be done. By using such a specific oil agent, both hydrophilic and water-repellent performances are appropriately imparted, and the exuding body fluid can be absorbed in a spot. The quantitative ratio of glyceryl monostearate and polyoxyethylene lauryl ether, the quantitative ratio of stearic acid amide and palm oil, or the quantitative ratio of stearic acid amide and hydrogenated beef tallow in the oil is about the same. Is preferable.

In order to add the cationized starch and the oil to the nonwoven fabric used in the present invention, both may be imparted separately, but in general, a mixed solution in which both are liquefied is applied to the nonwoven fabric and both are imparted at once. do. The mixed solution can be prepared by any method, and for example, the mixed solution can be prepared by adding and mixing an oil agent in the gelatinized starch paste solution.

The amount of cationized starch applied is arbitrary, but is generally preferably 3 to 5% by weight based on the weight of the non-woven fabric. If the applied amount is less than 3% by weight, the wear resistance tends to decrease. Further, when the applied amount exceeds 5% by weight, the texture and flexibility of the nonwoven fabric tend to decrease. The amount of the oil applied is arbitrary, but it is generally preferably 0.3 to 1.5% by weight with respect to the weight of the nonwoven fabric. If the applied amount is less than 0.3% by weight, it tends to be difficult to absorb the body fluid in a spot manner. Further, when the applied amount exceeds 1.5% by weight, the strength and elongation of the nonwoven fabric tends to decrease.

In the body fluid-absorbing article according to the present invention, the liquid-absorbing liquid 3 is arranged next to the surface material 1. The liquid absorbing liquid 3 is an aggregate mainly composed of pulp fibers. In the present invention, the bulky nonwoven fabric 2 having a cushioning property may be arranged between the surface material 1 and the liquid absorbing liquid 3. By arranging the bulky nonwoven fabric 2, the surface material 1 is further improved in contact with the skin. The bulky nonwoven fabric 2 is thicker than the nonwoven fabric constituting the surface material 1. Further, it is preferable that hydrophobic fibers other than the cellulosic fibers are used as the constituent fibers of the bulky nonwoven fabric 2. When hydrophilic fibers such as cellulosic fibers are used, the spot liquid absorption property of the surface material 1 tends to be impaired.

The leak-proof material 4 is arranged next to the liquid-absorbent material 3. As the leak-proof material 4, a body fluid-impermeable synthetic resin film or the like is used. Fixtures (not shown) such as double-sided adhesive tape may be arranged on the surface of the leak-proof material 4 (opposite surface on the skin side). This is to fix the body fluid-absorbing article to the underwear with a fixative so that it does not shift during use.

The body fluid-absorbing article according to the present invention is suitably used as a sanitary napkin or a disposable diaper. It can also be used as a wound patch for sucking blood exuding from a wound.

Since a specific body fluid-absorbing article according to the present invention is used as the surface material, the surface material is not easily torn and the exuding body fluid can be absorbed in a spot manner. That is, during the use of a body fluid-absorbing article, it has the effect of being less likely to tear due to friction against the skin, and the exuding body fluid is less likely to diffuse in the surface direction along the surface material, so that it is not sticky to the skin and can be used comfortably. It has the effect of being able to do it.

Example 1
[Preparation of non-woven fabric]
Bleached cotton (manufactured by Marusan Sangyo Co., Ltd.) to which 0.4% by weight of natural oil (cottonseed oil) was attached was prepared. This bleached cotton was spread and accumulated through an air array card to obtain a fiber web having a basis weight of about 35 g / m ² . The fiber web was placed on a mesh-like support and entangled with water while being conveyed. The water flow entanglement was performed by the following method using an injection device in which injection holes having a nozzle diameter of 0.1 mm were arranged in a row with a hole spacing of 0.6 mm. That is, the fiber web is placed on a support of 100 mesh, and the water flow jetted from the injection device at an injection pressure of 2.8 MPa is applied twice toward the surface of the fiber web, and then the fiber web is inverted to invert the fiber web. A fiber fleece was obtained by applying a water stream sprayed twice at an injection pressure of 2.8 MPa toward the back surface. This fiber fleece was placed on a support of 25 mesh, and the water flow sprayed at an injection pressure of 4.1 MPa was applied twice using the above-mentioned injection device to obtain a non-woven fabric.

[Preparation of mixture]
An oil agent containing stearic acid amide and palm oil was added and mixed with a cationized starch (starch having a molecular weight of several hundred thousand levels) paste solution to obtain a mixed solution. The weight ratio of the cationized starch to the oil in the mixed solution was 6: 1.

[Manufacturing of surface materials]
After applying the above-mentioned mixed solution by spray to the above-mentioned nonwoven fabric, it is dried at 100 ° C. to obtain a surface material to which 3% by weight of cationized starch and 0.5% by weight of an oil agent are added to the weight of the nonwoven fabric. rice field.

Example 2
By the same method as in Example 1, 3% by weight of the cationized starch and 1.0% by weight of the oil agent were used, except that the mixed solution having a weight ratio of the cationized starch and the oil agent of 3: 1 was used. Was given to the surface material.

Example 3
By the same method as in Example 1, cations are used with respect to the weight of the non-woven fabric, except that the oil containing lipophilic glyceryl monostearate and polyoxyethylene lauryl ether is used instead of the oil containing stearic acid amide and palm oil. A surface material to which 3% by weight of the chemical starch and 0.5% by weight of the oil agent were applied was obtained.

Example 4
By the same method as in Example 2, cations are used with respect to the weight of the non-woven fabric, except that the oil containing lipophilic glyceryl monostearate and polyoxyethylene lauryl ether is used instead of the oil containing stearic acid amide and palm oil. A surface material to which 3% by weight of the chemical starch and 1.0% by weight of the oil agent were applied was obtained.

Example 5
Non-woven weight by the same method as in Example 1 except that the cationized starch (starch having a molecular weight of tens of thousands level) is used instead of the starch (starch having a molecular weight of several hundred thousand levels). A surface material to which 3% by weight of cationized starch and 0.5% by weight of an oil agent were added was obtained.

Example 6
Non-woven weight by the same method as in Example 2 except that the cationized starch (starch having a molecular weight of tens of thousands level) is used instead of the starch (starch having a molecular weight of several hundred thousand levels). A surface material to which 3% by weight of cationized starch and 1.0% by weight of an oil agent were added was obtained.

Example 7
By the same method as in Example 5, 5% by weight of the cationized starch and 0.5% by weight of the oil agent were used, except that the mixed solution having a weight ratio of the cationized starch and the oil agent of 10: 1 was used. Was given to the surface material.

Example 8
5% by weight of cationized starch and 1% by weight of oil are added to the weight of the non-woven fabric by the same method as in Example 5 except that a mixed solution having a weight ratio of cationized starch to oil of 5: 1 is used. The surface material was obtained.

Example 9
By the same method as in Example 7, the weight of the non-woven fabric is reduced except that the cationized starch (starch having a molecular weight of several thousand levels) is used instead of the starch (starch having a molecular weight of tens of thousands of levels). On the other hand, a surface material to which 5% by weight of cationized starch and 0.5% by weight of an oil agent were applied was obtained.

Example 10
[Preparation of mixture]
An oil containing stearic acid amide and palm oil was added and mixed with a cationized starch (starch having a molecular weight of several thousand levels) paste solution to obtain a mixed solution. The weight ratio of the cationized starch to the oil in the mixed solution was 50: 7.
By the same method as in Example 1 except that this mixed solution is used instead of the mixed solution of Example 1, 5% by weight of the cationized starch and 0.7% by weight of the oil agent are added to the weight of the nonwoven fabric. A surface material was obtained.

Example 11
By the same method as in Example 5, the weight of the non-woven fabric is reduced except that the cationized starch (starch having a molecular weight of several thousand levels) is used instead of the starch (starch having a molecular weight of tens of thousands of levels). On the other hand, a surface material to which 3% by weight of cationized starch and 0.5% by weight of an oil agent were applied was obtained.

Comparative Example 1
The non-woven fabric obtained in Example 1 was used as a surface material as it was without any treatment.

Comparative Example 2
An oil agent containing stearic acid amide and palm oil was applied to the nonwoven fabric obtained in Example 1 by spraying, and then dried at 100 ° C., and the surface was provided with 0.3% by weight of the oil agent based on the weight of the nonwoven fabric. I got the wood.

Comparative Example 3
An oil agent containing stearic acid amide and palm oil was applied to the nonwoven fabric obtained in Example 1 by spraying, and then dried at 100 ° C., and a surface to which 0.5% by weight of the oil agent was applied to the weight of the nonwoven fabric. I got the wood.

Comparative Example 4
An oil agent containing stearic acid amide and palm oil was applied to the nonwoven fabric obtained in Example 1 by spraying, and then dried at 100 ° C. to give 0.7% by weight of the oil agent to the weight of the nonwoven fabric. I got the wood.

Comparative Example 5
The non-woven fabric obtained in Example 1 is sprayed with pregelatinized starch (starch having a molecular weight of several hundred thousand levels) paste solution, dried at 100 ° C., and 3 weights of pregelatinized starch with respect to the weight of the non-woven fabric. A surface material to which% was given was obtained.

Comparative Example 6
[Preparation of mixture]
An oil agent containing stearic acid amide and palm oil was added and mixed with an pregelatinized starch (starch having a molecular weight of several hundred thousand levels) paste solution to obtain a mixed solution. The weight ratio of pregelatinized starch to the oil in the mixed solution was 10: 1.
3% by weight of pregelatinized starch and 0.3% by weight of oil are added to the weight of the non-woven fabric by the same method as in Example 1 except that this mixed solution is used instead of the mixed solution of Example 1. A surface material was obtained.

Comparative Example 7
A liquid containing a paper strength enhancer containing polyacrylic acid (salt) as a main component is applied to the nonwoven fabric obtained in Example 1 by spraying, and then dried at 100 ° C. with respect to the weight of the nonwoven fabric. A surface material to which 3% by weight of the force enhancer was applied was obtained.

Comparative Example 8
[Preparation of mixture]
An oil agent containing stearic acid amide and palm oil was added and mixed with a liquid containing a paper strength enhancer containing polyacrylic acid (salt) as a main component to obtain a mixed liquid. The weight ratio of the paper strength enhancer and the oil agent in the mixed solution was 10: 1.
By the same method as in Example 1 except that this mixed solution is used instead of the mixed solution of Example 1, 3% by weight of the paper strength enhancer and 0.3% by weight of the oil agent are added to the weight of the nonwoven fabric. The surface material was obtained.

Comparative Example 9
[Preparation of mixture]
An oil agent containing stearic acid amide and palm oil was added and mixed with a liquid containing a paper strength enhancer containing polyacrylic acid (salt) as a main component to obtain a mixed liquid. The weight ratio of the paper strength enhancer and the oil agent in the mixed solution was 30: 7.
By the same method as in Example 1 except that this mixed solution is used instead of the mixed solution of Example 1, 3% by weight of the paper strength enhancer and 0.7% by weight of the oil agent are added to the weight of the nonwoven fabric. The surface material was obtained.

The surface materials obtained in Examples 1 to 11 and Comparative Examples 1 to 9 were evaluated for wear resistance (times) and spot liquid absorption (mm) by the following methods. The results are shown in Table 1.

[Evaluation of wear resistance (times)]
From each of the surface materials obtained in Examples 1 to 11 and Comparative Examples 1 to 9, 30 samples having a length of 293 mm and a width of 165 mm were collected in a random direction. Six points of this sample were set in a Gakushin type friction fastness tester (manufactured by Daiei Kagaku Seiki Seisakusho Co., Ltd., model "RT-300") in accordance with JIS L0849, and the wear resistance was measured. When setting the sample, a urethane mat was laid under the sample in advance, and the sample was fixed to the fixture provided in the Gakushin type friction fastness tester so as not to cause wrinkles. Further, the surface of the friction terminal was covered with a cloth adhesive tape, and a load of 300 g was applied to the friction terminal so that the cloth adhesive tape and the sample came into contact with each other. Then, the friction terminal was slid at a reciprocating speed of 30 times / min, and the number of reciprocating times when all 6 points of the sample were visually torn was measured. This measurement was performed 5 times, and the average value of these was taken as the wear resistance (times). Even if the number of round trips exceeded 500, if no tear was visually observed in all 6 points of the sample, the measurement was stopped and the number of round trips was set to 500. Therefore, the maximum value of wear resistance (times) is 500 times.

[Evaluation of spot liquid absorption (mm)]
From each of the surface materials obtained in Examples 1 to 11 and Comparative Examples 1 to 9, three 10 cm × 10 cm test pieces were collected. Three test pieces were overlapped and placed on a filter paper. 1 cc of the blue solution was added dropwise to the test piece, and the mixture was left for 5 minutes. After that, only the upper test piece (test piece directly touched by the blue solution) is taken out, and the widest vertical length (mm) and the widest horizontal length (mm) of the blue-colored area are added up. The spot liquid absorbency (mm) was set.

[Table 1]
━━━━━━━━━━━━━━━━━━━━━━━━━━━━
Abrasion resistance (times) Spot liquid absorption (mm)
━━━━━━━━━━━━━━━━━━━━━━━━━━━━
Example 1 450 61.7
Example 2 424 52.7
Example 3 500 64.3
Example 4 325 50.7
Example 5 175 36.7
Example 6 225 41.7
Example 7 275 30.0
Example 8 400 36.0
Example 9 375 45.0
Example 10 300 51.3.
Example 11 150 49.0
Comparative Example 1 125 89.7
Comparative Example 2 50 51.3.
Comparative Example 3 25 55.7
Comparative Example 4 25 38.3
Comparative Example 5 500 92.6
Comparative Example 6 90 38.0
Comparative Example 7 475 95.0
Comparative Example 8 75 72.7
Comparative Example 9 175 83.0
━━━━━━━━━━━━━━━━━━━━━━━━━━━━

As can be seen from the results in Table 1, the surface material according to the example has improved wear resistance and spot liquid absorption in a well-balanced manner as compared with the surface material according to the comparative example.

It is a schematic cross-sectional view of the body fluid-absorbing article which concerns on an example of this invention.

1 Surface material 2 Bulky non-woven fabric 3 Liquid absorbing material 4 Leakage-proof material

Claims (4)

In a body fluid-absorbing article in which a surface material, a liquid-absorbing material, and a leak-proof material are arranged in this order from the body fluid-exuding side.
The surface material is made of cellulose-based fibers, and a non-woven fabric in which the constituent fibers are entangled with each other contains cationized starch, an oil containing glyceryl polyostearate and polyoxyethylene lauryl ether, and stearic acid amide. And an oil agent selected from the group consisting of an oil agent containing hydrogenated beef fat and an oil agent containing stearic acid amide and palm oil. The body fluid-absorbing article according to claim 1, wherein the cellulosic fiber is a cotton fiber. The body fluid absorbency according to claim 1, wherein the amount of cationized starch applied is 3 to 5% by weight with respect to the weight of the nonwoven fabric, and the amount of oil applied is 0.3 to 1.5% by weight with respect to the weight of the nonwoven fabric. Goods. The body fluid-absorbing article according to claim 1, wherein the liquid-absorbent is an aggregate of pulp fibers.

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