WO2018225272A1

WO2018225272A1 - Fiber article treatment method

Info

Publication number: WO2018225272A1
Application number: PCT/JP2017/021554
Authority: WO
Inventors: 田中　雅仁; 大谷　憲一; 浩文中西
Original assignee: 花王株式会社
Priority date: 2017-06-09
Filing date: 2017-06-09
Publication date: 2018-12-13

Abstract

This fiber article treatment method is for a fiber article (1) which has: a skin-facing surface (1a) that has a water absorbent property and is disposed on a side relatively closer to the skin of a user when in use; and a non-skin-facing surface (1b) that is disposed on a relatively farther side from the user's skin. The fiber article treatment method prevents, when another fiber article (20) is worn over the fiber article (1), the user's bodily fluids that are absorbed through the skin-facing surface (1a) of the fiber article (1) from moving to the other fiber article (20). This fiber article treatment method comprises a water repellency imparting step for selectively imparting water repellency to the non-skin-facing surface (1b) side of the fiber article (1) in the thickness direction thereof by imparting, by means of an agent-imparting means, a water repellency-imparting agent to the non-skin-facing surface (1b) of the fiber article (1), and as a result of this water repellency imparting step, a water repellent region (2) is formed on the non-skin-facing surface (1b).

Description

Processing method for textile articles

The present invention relates to a method for treating textile articles used on the skin, such as various clothes and urine leakage treatment pads, and more specifically, body fluid excreted from the body oozes into clothes and is visible from the outside. The present invention relates to a method for treating a fiber article that can effectively prevent the above disadvantages.

Inner garments typified by underwear are one of typical examples of fiber articles that are mainly composed of fibers and are applied directly to the skin. Further, an absorbent article of a type that is attached to the inside of an undergarment or a diaper or a diaper cover and mainly absorbs urine is known, and such an absorbent article is also a kind of fiber article. Patent Document 1 discloses a male incontinence having a structure (leakage cuff) that blocks the lateral flow of excreted urine so that it does not leak out even if a large amount of urine is excreted at one time as a kind of such absorbent article. The pad is described. Such a fiber article is required to absorb bodily fluids excreted from the body such as sweat, urine, blood, etc., and to have no wet or sticky feeling on the surface in contact with the skin.

In Patent Document 2, as a fabric that does not feel sticky even when a large amount of sweat is worn during wearing, the surface of the fabric has a plurality of island-shaped portions having water absorption in a sea-like portion having water repellency. In addition, there is described a fabric in which the area per one of the island-shaped portions and the total area ratio of the island-shaped portions on the surface are set in specific ranges. The fabric described in Patent Document 2 is manufactured by printing on the surface of a fabric having water absorption by a known method such as a rotary screen printing method using various water repellents such as fluorine and silicone. The

In Patent Document 3, a woven or knitted fabric containing cotton fibers is subjected to an alkali treatment to remove cotton wax contained in the cotton fibers, and then a water repellent is partially attached to at least one surface of the woven or knitted fabric. It is described that a woven or knitted fabric having a low wet feeling and a hygroscopic property can be obtained. According to Patent Document 3, the water repellent is preferably attached only to the surface in contact with the skin of the woven or knitted fabric, and the polygonal pattern is continuous at the corners as the water repellent adhesion pattern. Patterns and lattice patterns are preferred.

In Patent Document 4, a sweat-preventing fabric composed of polyester fiber is used as a sweat-preventing fabric for preventing sweat from occurring when sweat is applied, and a water-repellent agent is attached to only one surface of the fabric, and the other surface. Is described as having an uneven structure. The sweat-prevention fabric described in Patent Document 4 is used by being arranged so that one surface to which a water repellent agent is attached is located on the outside air side and the other surface of the concavo-convex structure is located on the skin side. According to Patent Document 4, the surface that comes into contact with the skin during use has a concavo-convex structure, so that the contact area between the skin and the fabric is reduced, so that the sticky feeling is reduced, and sweat is formed in the concave portion of the concavo-convex structure. It is said that the effect of preventing sweating is improved because the drying speed is increased by being diffused along. Further, regarding the water repellent, Patent Document 4 describes that it is preferable to obtain an excellent sweating prevention effect that is adhered to the entire surface of the fabric rather than partially adhered to the surface of the fabric. .

Patent Document 5 discloses a fluorochemical composition that can impart to a fiber article resistance to dirt and stains caused by body fluids such as sweat, specifically oil repellency, water repellency, stain release properties, stain resistance, and the like. Things are listed. According to Patent Document 5, when such a fluorochemical composition is applied to a fiber article to form a coating film, the coating film is maintained even if the fiber article is washed multiple times. .

Japanese Patent Laying-Open No. 2015-188714 JP 2012-126036 A JP 2007-162150 A JP2011-226001A JP 2010-529263 A

The present invention has a water absorption property, a skin facing surface that is disposed on the side relatively closer to the user's skin at the time of use, and a non-skin facing surface that is disposed relatively on the side far from the user's skin. In the fiber article having the above, when the fiber article is worn and another fiber article is worn on top of it, the body fluid of the user absorbed from the skin facing surface of the fiber article is It is the processing method of the fiber article for preventing shifting to another fiber article. Water repellent that selectively repels the non-skin facing surface in the thickness direction of the fiber article by applying a water repellency imparting agent to the non-skin facing surface of the fiber article using an agent-imparting means. Process.

FIG. 1 is a diagram schematically showing a wearing state of water-repellent imparted pants as an inner garment, which is an embodiment of a water-repellent imparted fibrous article obtained by carrying out the method for treating a fiber article of the present invention. is there. FIG. 2 is a diagram schematically showing a state in which pants as outer clothing are worn from above the water-repellent pants shown in FIG. 1. FIG. 3 is a microscope photograph of the non-skin-side water-repellent region in a specific example of the water-repellent fiber-imparted article obtained by carrying out the method for treating a fiber article of the present invention. FIG. 4 is obtained by imaging a cross section along the thickness direction of a specific example of a water-repellent fiber-imparted fiber article obtained by carrying out the fiber article processing method of the present invention with an energy dispersive X-ray analyzer (EDS). It is the obtained image (EDS image). FIG. 5 is an EDS image in a state after washing a specific example of the water-repellent fiber-applied fiber article shown in FIG. 4, and shows a state in which the water-repellent agent is removed by washing and the non-skin-side water-repellent region disappears. Show.

Detailed Description of the Invention

In recent years, particularly in men, urination is poor when urinating, and a small amount of urine leakage occurs after urination and the pants become dirty. Especially in the case of elderly men, urine tends to remain in the urethra after the end of urination due to urethral dilation associated with aging, and this residual urine can be discharged from the penis by some sort of spillage and stain the pants. Yes, the trouble is serious. Such urine leakage due to residual urine is about several to 10 mL, most of which is so-called “little leak” due to a small amount of urine of about 1 mL or less, and incontinence that the pants get wet drenched, so-called “O” Unlike “leaking”, it is not always necessary to change pants, so some people do not regard it as a problem to be solved immediately. However, small leaks cause discomfort due to wet pants, and urine oozes out from outer clothing such as trousers worn over the inner clothing such as pants, and there is a smell around it. There are many people who are worried about the countermeasures.

As a method for solving such a problem of clothes stains and odor due to a slight leak, use of a male incontinence pad as described in Patent Document 1 can be mentioned. In recent years, a small incontinence pad has been proposed in order to make it difficult for a third party to recognize that a pad is used by a third party. There is a psychological resistance to using an incontinence pad with a small amount of urine leakage, and there is a strong demand for solving the problem caused by leakage without using the incontinence pad.

The techniques described in Patent Documents 2 and 3 provide a water repellent agent on the surface of the fiber article to improve the dryness of the surface in contact with the skin of the fiber article. No particular consideration has been given to the stains on clothing due to, and these techniques are insufficient as countermeasures against leaks. In addition, although the fabric for preventing sweating described in Patent Document 4 has a certain effect for preventing sweating, there is a concern that the breathability is lowered particularly in the form in which the water repellent is adhered to the entire surface of the fabric. If used, there is a risk of causing odor and skin problems such as swelling and fogging. In addition, since the fabric for preventing sweating described in Patent Document 4 is composed of polyester fibers, the fabric itself is poor in water absorption, and also in terms of wear, compared to those using water absorbent fibers such as natural cellulose fibers. Inferior. In addition, when the fluorochemical composition described in Patent Document 5 is applied to a fiber article such as pants and part thereof is hydrophobized, it may be effective in preventing soiling of clothes due to slight leakage. There is a possibility that the water repellency of the article proceeds more than necessary, and as a result, the water absorption, flexibility, breathability, etc. inherent to the fiber article may be reduced.

As mentioned above, many people are worried about the problem that relatively small amounts of body fluids such as urine and sweat ooze out on clothes, but using special countermeasure goods such as incontinence pads and sputum pads is avoided. There is a tendency to. A technology that can solve the above-mentioned problems while using clothing such as underwear that is usually used as it is without using such special countermeasure goods has not yet been provided.

Therefore, an object of the present invention relates to providing a method for treating a fiber article, which can effectively prevent the inconvenience that body fluid excreted from the body oozes out into clothing and becomes visible from the outside.

Hereinafter, the present invention will be described in detail. In FIG. 1, the wearing state of the water-repellent provision pants as inner clothing which is one embodiment of the water-repellent provision fiber article obtained by implementation of the processing method of the textile article of the present invention, FIG. The state where the trousers 20 as the outer garments are worn from above the water-repellent imparting pants 10 is schematically shown. The water repellency imparting pant 10 includes a pant 1 that is an untreated fiber article and a water repellency imparting agent (non-skin-side water-repellent region 2) attached to the pant 1.

The pants 1 which is one embodiment of the fiber article to be treated by the treatment method of the present invention is basically configured in the same manner as a normal men's trunks-type pants which is an inner garment. And a crotch portion positioned between the two, a waist opening, and a pair of leg openings. The pants 1 are so-called front-closing trunks having no front opening, and stretchability is imparted to the waist end portion defining the waist opening by arranging a thread-like elastic member. The pants 1 has a skin facing surface 1a that is disposed on the side that is relatively closer to the user's skin during use, and a non-skin facing surface 1b that is disposed on the side that is relatively far from the user's skin, When the pants 1 as shown in FIG. 2 are worn, the skin facing surface 1 a comes into contact with the skin of the pants wearer 100, and the non-skin facing surface 1 b comes into contact with the pants 20. The pants 1 form the main body of the water-repellent imparted pants 10, and the basic performance of the water-repellent imparted pants 10 such as the appearance, texture, and wearing feeling is basically the original of the pants 1 that is the base of the pants 1. It comes from performance.

The fiber article that is the object of the treatment method of the present invention and is the base of the water-repellent fiber article is not particularly limited. With regard to the pants, the front body as shown in FIGS. 1 and 2 is a single layer. In addition to the trunks-type pants having a structure, for example, a so-called brief-type pant having a double front structure, when the front body of the pant 1 has such a multi-layer structure, The surface (outer surface) of the outermost layer farthest from the wearer's skin among them is the non-skin facing surface 1 b in contact with the trousers 20. The concept of the skin-facing surface and the non-skin-facing surface of the multilayered fiber article is also applied to other fiber articles other than pants.

The pant 1, which is a fiber article that is the base of the water repellent imparted pant 10 that is a water repellent imparted fiber article, will be further described. The pant 1 is a single fiber sheet mainly composed of fibers containing water absorbent fibers. 11 is provided. The fiber sheet 11 is the main body of the pants 1, and the front body, the backward appearance, and the crotch portion of the pants 1 are each formed by the fiber sheet 11. The skin facing surface 1 a of the pants 1 is the skin facing surface of the fiber sheet 11, and the non-skin facing surface 1 b of the pants 1 is the non-skin facing surface of the fiber sheet 11. The following description of the fiber sheet 11 is directly applied to the pants 1 (fiber article) unless otherwise specified.

The fiber sheet 11 is mainly composed of fibers including water-absorbing fibers. The fiber content in the fiber sheet 11 is preferably 50% by mass or more, more preferably 70% by mass or more, and may be composed of 100% by mass, that is, only the fibers. As the constituent fiber of the fiber sheet 11, fibers usually used in various textile products including clothing can be used without particular limitation, and natural fibers or chemical fibers may be used. More than one type of fibers can be used in combination.

Natural fibers may be plant fibers or animal fibers. Examples of plant fibers include wood pulp such as softwood pulp and hardwood pulp; non-wood fiber such as cotton and hemp. Examples of animal fibers include silk and wool.

Examples of chemical fibers include synthetic fibers made from resins such as polyester, acrylic, acrylic, nylon, vinylon, polypropylene, polyvinyl chloride, polyethylene, vinylidene, and polyurethane; regenerated fibers such as rayon, polynosic, cupra, and lyocell Semi-synthetic fibers such as acetate and triacetate; inorganic fibers such as glass fiber, metal fiber, and carbon fiber.

The fiber sheet 11 contains water-absorbing fibers. In the present invention, “water-absorbing fiber” is literally a fiber having water absorption, and more specifically, a fiber having an official moisture content of 5% or more. The water-absorbing fiber may be a fiber that has inherently water-absorbing properties, or may be a fiber that has been given a water-absorbing property by processing fibers that are not inherently water-absorbing. The natural fiber and the regenerated fiber and the semi-synthetic fiber among the chemical fibers can be used as the water-absorbing fiber in the present invention.

In addition, examples of synthetic fibers that can be used as the water-absorbing fiber in the present invention include inherently hydrophilic synthetic fibers such as polyvinyl alcohol fibers and polyacrylonitrile fibers; polyethylene terephthalate fibers, polyethylene fibers, polypropylene fibers, and polyester fibers. And the like, such as a fiber obtained by subjecting an inherently hydrophobic synthetic fiber to a hydrophilic treatment (hydrophilic treatment fiber). Examples of the hydrophilized fibers include synthetic fibers in which a hydrophilizing agent is kneaded, synthetic fibers having a hydrophilizing agent attached to the surface, and synthetic fibers that have been subjected to plasma treatment. The hydrophilizing agent is not particularly limited as long as it is a general hydrophilizing agent used for various textile products including clothing. The synthetic fiber may be a single fiber made of one kind of synthetic resin or a blend polymer obtained by mixing two or more kinds of synthetic resins, or may be a composite fiber. The composite fiber here is a synthetic fiber obtained by combining two or more kinds of synthetic resins having different components with a spinneret and simultaneously spinning them, and a single fiber having a structure in which a plurality of components are continuous in the length direction of the fiber. It is the thing which mutually adheres inside. The form of the composite fiber includes a core-sheath type and a side-by-side type, and is not particularly limited.

The form of the fiber sheet 11 is not particularly limited, and may be, for example, a woven fabric, a knitted fabric, a nonwoven fabric, or paper. In the case of a woven fabric or a knitted fabric, the weaving method and the knitting method are not particularly limited. Examples of the woven fabric include woven fabrics such as plain weave, twill weave and satin weave. Examples of the knitted fabric include flat knitting, flat knitting, rubber knitting, pearl knitting, double knitting, and the like; single knitting, single cord knitting, half tricot knitting, plain tricot knitting, and warp knitting such as Queens cord knitting. It is done. Examples of the nonwoven fabric include an air-through nonwoven fabric, a spunbond nonwoven fabric, a spunlace nonwoven fabric, a melt blown nonwoven fabric, a resin bond nonwoven fabric, and a needle punch nonwoven fabric.

The fiber sheet 11 may have a single-layer structure or a laminated structure formed by laminating a plurality of single-layer structure sheets. Examples of laminated nonwoven fabrics include spunbond-spunbond laminated nonwoven fabric (SS nonwoven fabric), spunbond-spunbond-spunbond laminated nonwoven fabric (SSS nonwoven fabric), spunbond-meltblown-spunbond laminated nonwoven fabric (SMS nonwoven fabric), span Examples include bond-meltblown-meltblown-spunbond nonwoven fabric (SMMS nonwoven fabric).

The fiber sheet 11 has a water absorption time of preferably 30 seconds or less, more preferably 20 seconds or less, more preferably 15 seconds or less, according to JIS L-1907. The water-repellent imparting pants 10 (pants 1) can absorb water and various aqueous liquids by including the fiber sheet 11 having such water absorption. For example, as a body fluid excreted from the body, sweat Can absorb urine, blood.

From the viewpoint of reliably imparting the water absorbency to the fiber sheet 11, it is preferable that the fiber sheet 11 contains a certain amount or more of the water absorbent fibers. Specifically, the ratio of the water-absorbing fibers to all the constituent fibers of the fiber sheet 11 (water-absorbing fiber occupation ratio) is preferably 50% by mass or more, more preferably 70% by mass or more, and 100% by mass, that is, all The constituent fiber may be a water absorbent fiber.

The fiber sheet 11 may take a form including both natural fibers and synthetic fibers as constituent fibers. The synthetic fiber here includes both those that are water-absorbing fibers and those that are not (non-water-absorbing fibers). As a feature of the fiber sheet 11 in such a natural synthetic mixed form, there is little dimensional shrinkage and loss of shape after repeated wet and dry (after repeated use). From the viewpoint of fully utilizing such characteristics of the natural synthetic mixed form, in the fiber sheet 11 of the natural synthetic mixed form, the content ratio of the natural fiber to the synthetic fiber is preferably 1/9 to natural fiber / synthetic fiber. 9/1, more preferably 2/8 to 8/2.

Moreover, the fiber sheet 11 can take the form which contains only a natural fiber as a constituent fiber. As a feature of the fiber sheet 11 having such a single fiber form, it is excellent in repeated water absorption and less skin irritation. As the natural fiber in the fiber sheet 11 in the form of a single fiber, a woven fabric or a knitted fabric prepared by spinning cotton fibers and using various weaving methods is particularly preferable.

The treatment method of the present invention, as shown in FIG. 2, when the pants 1 (textile articles) are worn and the pants 20 (other textile articles) are further worn on top of the pants 1, the skin of the pants 1. The user's bodily fluid (urine) absorbed from the facing surface 1a can be prevented from transferring to the trousers 20, and one of its main features is the repellent property of the fiber article using the agent applying means. A hydration process is mentioned. In the water repellency process according to the present invention, the non-skin facing surface 1b side in the thickness direction of the pants 1 is selectively applied by applying a water repellency imparting agent to the non-skin facing surface 1b of the pants (fiber sheet 11) 1. It is water repellent. That is, the treatment method of the present invention is not intended to make the entire pant 1 water repellent.

As a preferred embodiment of the water repellency step according to the present invention, the non-skin-side water-repellent region 2 including the adhesion portion of the water repellency imparting agent is formed on the non-skin facing surface 1b of the pants 1 (fiber article), Moreover, at least a part of the pants 1 that overlaps the non-skin-side water-repellent region 2 in a plan view and that is closer to the skin facing surface 1a of the pants 1 than the non-skin-side water-repellent region 2 is inherently the pants 1. A water-repellent step for maintaining the water-absorbing property (preferably, the water-absorbing time of 30 seconds or less by the dropping method of JIS L-1907). The water-repellent imparting pants 10 shown in FIGS. 1 and 2 are obtained through such a preferable water-repellent step. In the water repellency imparting pants 10, the portion of the fiber sheet 11 that overlaps the non-skin-side water-repellent region 2 in plan view has the water absorption inherent in the pants 1 (fiber sheet 11). Thus, the water-repellent imparting pants 10 have the fiber sheet 11 as the water absorption layer and the non-skin-side water-repellent region 2 in the thickness direction in the order closer to the skin of the pants wearer.

In the water-repellent imparting pants 10, the non-skin-side water-repellent region 2 functions as a body fluid barrier layer that prevents the liquid from oozing out from the fiber sheet 11 that is a water-absorbing layer. For example, as shown in FIG. 2, a so-called “little leak” occurs in the state where the trousers 20 as the outer garments are worn on the water-repellent imparted pants 10 as the inner garments. When a small amount of urine of about 1 mL or less is excreted from the excretory part (penis), the excreted urine moves through the fiber sheet 11 as the water absorption layer in the thickness direction and reaches the trousers 20, There is a concern that inconveniences such as visible urine spots (wet spots) occur and urine odor diffuses to the surroundings. However, in the water-repellent imparted pants 10, the non-skin-side water-repellent region 2 functions more specifically as a stain barrier layer than the body fluid barrier layer, thereby preventing urine from moving in the direction of the pants 20. The occurrence of can be prevented.

In addition, the water repellent imparting pants 10 has a basic structure that is based on the fact that the body fluid exudation preventing measure of forming the non-skin-side water repellent region 2 by applying the water repellent imparting agent is employed. Since it is substantially the same as the configuration of the pants 1 (textile article), it is difficult for third parties to recognize that the body fluid exudation prevention measures are adopted, and normal underwear is worn. Can be used with the same feeling. Further, the non-skin-side water-repellent region 2 is only formed on the non-skin-facing surface 1b of the pants 1, and the influence on the pants 1 due to the formation of the non-skin-side water-repellent region 2 is minimized. Therefore, the basic performance of the water-repellent imparted pants 10 such as appearance, wearing feeling, and water absorption is not inferior to that originally possessed by the pants 1 and may be improved in some cases. Is excellent in texture and feeling of use.

In the water repellency imparting pants 10, the non-skin-side water-repellent region 2 is partially formed on the non-skin facing surface 1 b of the pants 1 (non-skin facing surface of the fiber sheet 11). As shown in FIG. 2, the pant 1 is formed only at a position facing the excretion part (penis) of the pant wearer indicated by reference numeral 100 when the pant 1 is seen before, and has a substantially square shape in plan view.
In the treatment method of the present invention, the water repellency imparting agent as a stain barrier material such as body fluid may be formed on at least the non-skin facing surface of the fiber article, and the non-skin facing surface of the fiber article. What is necessary is just to provide a water-repellent imparting agent so that the site | part which wants to prevent the oozing-out of a liquid may be included. That is, the formation site of the non-skin-side water-repellent region 2 in the water-repellent imparted pants 10 is not particularly limited, and for example, the non-skin-side water-repellent region 2 is formed over the entire non-skin facing surface 1b in the front body of the pants 1. May be. The non-skin-side water-repellent region 2 forming portion on the non-skin facing surface 1b may not be a portion corresponding to the wearer's shadow as shown in FIG. 1 (center portion in front view of the pants 1). It can be set at any site, such as a site where body fluids are particularly worried about the wearer. Specifically, for example, the non-skin-side water-repellent region 2 may be formed on the right side or the left side of the reference with the virtual center line extending in the height direction by dividing the wearer's body in the width direction. .

In the water-repellent imparting pant 10, the surface of the non-skin-side water-repellent region 2, that is, the surface of the non-skin-facing surface 1b of the pant 1 (fiber article), preferably has a contact angle with water of 80 degrees. As described above, it is more preferably 85 degrees or more, and more preferably 90 degrees or more. The contact angle is an index of the hydrophobicity of the surface of the non-skin-side water-repellent region 2. The larger the contact angle value, the stronger the hydrophobicity (lower hydrophilicity), and the smaller the contact angle value, the more hydrophobic the contact angle. Poor property (highly hydrophilic). If the contact angle with the water on the surface of the non-skin-side water-repellent region 2 is too small, it is impossible to prevent the liquid from seeping out from the fiber sheet 11 to the pants 20 side, and the body fluid excreted from the body is applied to the clothing. There is a possibility that inconveniences such as oozing and being visible from the outside cannot be prevented.

Conventionally, the “water repellency” in the case of imparting water repellency to a workpiece (fiber article) is generally in a range exceeding 90 degrees when the contact angle with water is used as an index. In the technical idea of the present invention, it is sufficient that the liquid transfer from the inner garment side such as underwear to the outer garment side such as trousers is prevented and the liquid can be retained in the inner garment. What is necessary is just to provide hydrophilicity (high hydrophobicity) sufficiently lower than the hydrophilicity which outer clothing has. Such knowledge was obtained as a result of various studies by the present inventors, and the preferable range (80 degrees or more) of the contact angle with water on the surface of the non-skin-side water-repellent region 2 is as described above. Based on knowledge. The contact angle is measured by the following method.

<Measurement method of contact angle (contact angle of sheet surface)>
A rectangular shape in plan view of 150 mm in the vertical direction (MD direction) and 70 mm in the horizontal direction (CD direction) is cut out from the fiber article to be measured, and used as a measurement sample. The measurement environment is an air temperature of 23 ± 2 ° C. and a relative humidity of 50 ± 5% RH. A droplet of ion-exchanged water is attached to a measurement surface (non-skin-side water-repellent region) of the contact angle in the measurement sample, the droplet is recorded, and the contact angle is measured based on the recorded image. More specifically, a microscope VHX-1000 manufactured by Keyence Corporation is used as a measuring apparatus, and a medium magnification zoom lens is attached to the microscope VHX-1000 in a state where the zoom lens is tilted to 90 °. The measurement sample is set on the measurement stage of the measurement apparatus so that the surface to be measured is in an upward state and can be observed from the CD direction of the measurement sample. Then, a 3 μL droplet of ion-exchanged water is attached to the measurement target surface of the measurement sample set on the measurement stage, and an image of the droplet is recorded and taken into the measurement apparatus. At this time, the image is captured within 3 seconds. Of the recorded images, 10 images with clear edges in the CD direction or one end in the CD direction are selected, the contact angle of the droplets is measured based on the reference plane for each of the 10 images, and the contact between them is measured. The average value of the corners is defined as the contact angle of the surface to be measured (surface of the non-skin-side water-repellent region) of the fiber article to be measured.

In the contact angle measurement method described above, depending on the weaving structure of the fabric in the fiber article to be measured, the surface unevenness may be large, and the reference plane may not be determined during magnified observation. In that case, the amount of ion-exchanged water droplets is changed from 3 μL to 0.1 mL, and the droplet attachment method is stationary attachment using a Komagome pipette, and the image is not enlarged (1/1). take in. Except for the above points, the measurement can be performed in the same manner as described above.

In addition, the surface of the non-skin-side water-repellent region 2, that is, the surface of the non-skin facing surface 1b of the pants 1 (textile article) where the water-repellent agent is applied has a contact angle with water of 80 degrees or more. Furthermore, the water absorption rate is preferably 10 seconds or longer, more preferably 25 seconds or longer, and more preferably 40 seconds or longer. The water absorption speed used here is represented by the time (water absorption time) required to absorb a predetermined amount of water. The larger the water absorption speed value (the longer the water absorption time), the higher the water absorption speed. Judged to be slow. When the water absorption speed of the surface of the non-skin-side water-repellent region 2 is 10 seconds or more, the non-skin facing surface 1b side of the pants 1 provided with the non-skin-side water-repellent region 2 is located on the opposite side. Since the amount of water absorption is relatively small in comparison with the skin facing surface 1a side, the liquid absorbed on the skin facing surface 1a side is effectively suppressed from moving to the non-skin facing surface 1b side. As a result, the pants 20 It is possible to prevent the liquid from leaking into the water more effectively. If the water absorption rate on the surface of the non-skin-side water-repellent region 2 is too high, the difference from the water absorption rate of the skin facing surface 1a is small, so that the liquid may penetrate the pants 1 in the thickness direction and ooze out to the pants 20 side. is there. Further, the water absorption speed is preferably 600 seconds or less, and more preferably 300 seconds or less, from the viewpoint of achieving both the point of effectively preventing the liquid from seeping into the pants 20 and the air permeability. The water absorption rate is measured by the following method.

<Measurement method of water absorption rate>
Five square shapes in plan view in the longitudinal direction (MD direction) 200 mm and the lateral direction (CD direction) 200 mm are cut out from the fiber article to be measured and used as a measurement sample. . The measurement environment is an air temperature of 23 ± 2 ° C. and a relative humidity of 50 ± 5% RH. The water absorption rate for this measurement sample is measured according to the method described in JIS L1907. However, the height from the measurement target surface of the measurement sample to the burette tip is changed to 5 mm. The measurement target surface is a surface that is a measurement target of the water absorption speed in the measurement sample, and is a skin facing surface or a non-skin facing surface (a surface of the non-skin-side water-repellent region).

The contact angle with water on the surface of the non-skin-side water-repellent region 2 and the water absorption speed are adjusted by appropriately adjusting the type of water-repellent imparting agent that forms the non-skin-side water-repellent region 2, the amount of adhesion, the range of adhesion, etc. Is possible. Further, as will be described later, the non-skin-side water-repellent region 2 is formed by applying a water-repellent imparting agent to the non-skin facing surface 1b of the pant 1 (textile article) serving as the base of the water-repellent imparting pant 10. However, the contact angle with water on the surface of the non-skin-side water-repellent region 2 and the water absorption speed can also be adjusted by devising an application method such as the viscosity of the water-repellent agent and the application pressure during application.

The adhesion amount (basis weight) of the water repellency imparting agent in the non-skin side water repellent region 2 is preferably 0.02 g / m ² or more, more preferably 0.05 g / m ² or more, and preferably 1.5 g / m ^2. m ² or less, more preferably 1.2 g / m ² or less.

The non-skin-side water-repellent region 2 is a region including the “water-repellent imparting agent adhering portion” on the non-skin facing surface 1b of the pants 1, and i) the water-repellent imparting agent is continuous in the surface direction of the non-skin facing surface 1b. And the form which does not have a non-adhesion part of a water repellency imparting agent, and the form which the adhesion part and non-adhesion part of a water repellency imparting agent coexist can be taken. In the form ii), the water repellency-imparting agent is discontinuously present on the non-skin facing surface 1b, that is, a plurality of adhering portions are intermittently present. The water area 2 is a group of areas that can be recognized by the observer as a single area. FIG. 3 shows a microscope photograph (observation magnification 50 ×) of a specific example of the non-skin-side water-repellent region in the form ii). In the non-skin-side water-repellent region shown in FIG. 3, it can be seen that the adhering part and the non-adhering part of the water repellency imparting agent are mixed.

By applying a water repellency imparting agent to the non-skin facing surface 1b of the pants 1 to form the non-skin-side water-repellent region 2, the body fluid excreted from the body oozes out into the clothes and is visible from the outside as described above. While inconveniences that can be prevented are prevented, there is a concern that the air permeability and flexibility at the site where the non-skin-side water-repellent region 2 is formed are lowered. In this regard, as in the form of ii) (see FIG. 3), if the non-skin-side water-repellent region 2 includes both the adhering portion and the non-adhering portion of the water-repellent agent, the application of the water-repellent agent is provided. The deterioration of the air permeability and flexibility due to the above can be suppressed, and the air permeability and flexibility inherent to the pants 1 can be substantially maintained. In the non-skin-side water-repellent region 2, the adhering part and the non-adhering part of the water-repellent imparting agent are mixed, for example, when the water-repellent imparting pant 10 is manufactured. Can be achieved by intermittent attachment. For example, the intermittent application of the water repellency-imparting agent may be performed by spraying the water-repellency-imparting agent onto the non-skin facing surface 1b using a non-contact type agent application means such as a spray, or by a roll-on method or a stick shape described later. It is possible to carry out by applying the water repellent imparting agent directly in contact with each other, and by these methods, a form in which the adhering part and the non-adhering part of the water repellent imparting agent are mixed as shown in FIG. 3 is obtained. It is done.

The ratio of the total area of the water repellent imparting agent occupying the total area of a 50 mm square region (unit region) arbitrarily selected from the non-skin side water repellent region 2 (water repellency imparting agent adhering portion occupancy) is Preferably, it is 10% or more, more preferably 15% or more, and preferably 80% or less, more preferably 60% or less. What has the water repellency imparting agent adhesion part occupation rate in such a range is included in the above-mentioned form ii). The form of i) has a water repellency imparting agent adhesion portion occupation ratio of 100%. If the water repellency imparting agent occupying portion occupancy is too low, the function of the non-skin-side water-repellent region 2 as a barrier layer becomes insufficient, and bodily fluid excreted from the body oozes into the clothing and is visible from the outside. There is a possibility that inconveniences such as becoming possible cannot be prevented. If the water repellency imparting agent adhering portion occupancy is too high, depending on the type of pants 1, etc., when a water repellency imparting agent is applied to form the non-skin-side water-repellent region 2 on the non-skin facing surface 1b, The imparted water repellency imparting agent may permeate to the skin facing surface 1a on the opposite side, which may reduce the effect of preventing the liquid from seeping into the pants 20. In addition, when the water repellency imparting agent adhesion portion occupancy is high, the function as a barrier layer of the non-skin-side water-repellent region 2 is high, but on the other hand, the air permeability of the site where the non-skin-side water-repellent region 2 is formed. , Flexibility may be insufficient.

In addition, in the water repellency imparting pants 10, the water repellency imparting agent is not adhered to the skin facing surface 1 a opposite to the surface on which the non-skin side water repellent region 2 is formed, or a very small amount even if it is adhered. Therefore, the occupancy ratio of the water repellency imparting agent adhering portion of the skin facing surface 1a is significantly lower than that of the non-skin side water repellent region 2. Specifically, the ratio of the total area of the water-repellent imparting agent adhering portion to the total area of a 50 mm square region (unit region) arbitrarily selected from the skin facing surface 1a (water repellent imparting agent adhering portion occupation ratio) ) Is preferably 15% or less, more preferably 5% or less, and most preferably zero.

In order to confirm whether or not the adhesion portion of the water repellency-imparting agent (non-skin-side water-repellent region according to the present invention) exists in the fiber article, the following confirmation method A or B can be used. Any of the following confirmation methods A and B can be used to calculate the water repellency imparting agent adhesion portion occupancy. However, in the case of the confirmation method B using a scanning electron microscope, the unit area is not 100 mm square but 2 mm square, and the water repellency imparting agent occupancy ratio is preferably 10% or more, more preferably Is 15% or more, preferably 80% or less, more preferably 60% or less.

Confirmation method A: Drops of colored liquid are dropped on the surface (non-skin facing surface) of the fiber article to be confirmed. The coloring liquid is prepared by dissolving or dispersing an appropriate coloring agent (dye, pigment, etc.) in water. When the water repellency imparting agent is not attached to the dropping position of such a droplet, the dropping position is colored by the droplet, but when the water repellency imparting agent is attached to the dropping position, the droplet is Since it is repelled by the water repellency-imparting agent, the dropping position is not colored and remains the original color. Usually, by performing the dropping operation of the colored liquid a plurality of times, a non-colored region that is not colored can be visually recognized, and the region is attached to the water-repellent imparting agent (non-skin-side water-repellent region according to the present invention). It can be determined. The ratio (the former / the latter) of the area of the non-colored area and the area of the unit area (50 mm square) is the water repellency imparting agent adhering portion occupation ratio.

Confirmation Method B: This method is particularly effective when the water repellency imparting agent adhering to the confirmation target is a modified silicone water repellency imparting agent. Observe the surface (non-skin facing surface) of the fiber article to be confirmed using a scanning electron microscope (SEM) and attached energy dispersive X-ray analyzer (EDS), and output the observation image as necessary. Then, the presence or absence of element Si contained in the modified silicone-based water repellent agent is confirmed. When the element Si is confirmed, the portion can be determined as a water repellent imparting portion (non-skin-side water repellent region according to the present invention). The observation magnification by SEM is usually 50 to 100 times. The water repellency imparting agent adhering portion occupation ratio can be calculated by, for example, a method of copying the adhering portion of the water repellent imparting agent on a transparent film and calculating the area ratio by an image analysis method. As a specific example of the observation conditions in the confirmation method B, JSMOL JSM-6510 (manufactured by JEOL) is used as the SEM, EX-230BU (built in the apparatus) is used as the EDS, the observation magnification is 50 times, and the acceleration voltage is 10 kV. Can be mentioned.

In both of confirmation methods A and B, depending on the weaving structure of the fabric in the fiber article to be confirmed, there is a level difference caused by unevenness on the surface (non-skin facing surface) of the fiber article to be confirmed. In some cases, the water repellency agent adhering portion occupancy is calculated based on the total surface area of the unit region including the step.

In addition, in the water-repellent imparting pants 10, if the thickness 2T (see FIG. 2) of the water-repellent imparting agent in the non-skin-side water-repellent region 2 is too small, the non-skin-side water-repellent region 2 functions as a barrier layer. In contrast, if the thickness 2T is too large, the air permeability and flexibility are significantly reduced as compared to the state before the water repellency imparting agent is attached, that is, the pants 1 (textile article). There is a fear. In consideration of the above, the thickness 2T of the water repellent imparting portion of the non-skin-side water repellent region 2 is preferably 5% or more with respect to the thickness 1T (see FIG. 2) of the pants 1 (fiber article). More preferably, it is 10% or more, preferably 60% or less, more preferably 50% or less. From the viewpoint of maintaining the properties of the underwear that the pants 1 originally have as much as possible and effectively utilizing the water absorption that the pants 1 originally have, it is preferable that the thickness 2T is small and the pants 1 is relatively thin.

The thickness 2T of the adhesion portion of the water repellency imparting agent in the non-skin-side water repellent region 2 is preferably 0.05 mm or more, more preferably 0.1 mm or more, and preferably 0.5 mm or less, more preferably 0.4 mm. It is as follows.
The thickness 1T of the pants 1 (fiber sheet 11) is preferably 0.5 mm or more, more preferably 0.8 mm or more, and preferably 2 mm or less, more preferably 1.7 mm or less.

The thickness 2T can be measured by using a known thickness measuring method. However, prior to the measurement, the attached water repellency-imparting agent itself is colored with an appropriate colorant so that the measurement is smooth. Can be. When the attached water repellency-imparting agent is a modified silicone water repellency-imparting agent, the measurement method using SEM-EDS is simple as in the confirmation method B. In that case, the thickness 2T is measured in the cross-sectional direction of the measurement sample. The observation conditions may be, for example, an observation magnification of 100 times and an acceleration voltage of 10 kV. In addition, when preparing a measurement sample by cutting out a predetermined shape from the water-repellent imparting pants 10, in addition to performing a cutting operation known to those skilled in the art such as a microtome so that the cutting surface to be observed is not contaminated by the cutting operation, liquid nitrogen It is also possible to perform cutting with a frozen upper feather single-blade razor (FAS-10).

Further, in the water-repellent imparted pants 10, the air permeability of the formation site of the non-skin-side water-repellent region 2 is preferably 2 seconds / 100 ml or more, more preferably 3 seconds / 100 ml or more, and preferably 30 seconds / 100 ml or less. More preferably, it is 20 seconds / 100 ml or less. The “formation site of the non-skin-side water-repellent region” referred to here overlaps the non-skin-side water-repellent region 2 and the non-skin-side water-repellent region 2 in the water-repellent imparting pant 10 (fiber sheet 11) in plan view. In other words, it is a part other than the non-formation part of the non-skin-side water-repellent region 2 in the water-repellent imparting pants 10.
When the air permeability of the formation site of the non-skin-side water-repellent region 2 is too low, it can be determined that the non-skin-side water-repellent region 2 has an excessively high water-repellent agent adhering portion occupancy, and the state before the water-repellent agent is attached That is, the air permeability and flexibility of the pant 1 (textile article) are significantly reduced, and there is a possibility that troubles such as swelling and blurring may occur on the skin of the pant wearer. Moreover, when the air permeability of the formation part of the non-skin-side water-repellent region 2 is too high (the air permeability of the formation part of the non-skin-side water-repellent region 2 is substantially different from the air permeability inherent in the pants 1). The non-skin-side water-repellent region 2 is judged to be too low in the water-repellent imparting agent adhering portion occupancy and the amount of the water-repellent imparting agent is insufficient. The function as the barrier layer 2 may be insufficient.
The air permeability is a value measured according to JIS P8117 (1998), and is defined as the time required for 100 ml of air to pass through an area of 6.42 cm ² under a constant pressure. Therefore, a high air permeability means that it takes time to pass air, that is, the air permeability is low. Conversely, a low air permeability means high air permeability. Thus, the magnitude of the air permeability and the level of air permeability are opposite to each other. The air permeability can be measured with a Oken type air permeability meter.

In general, when a water-repellent treatment such as film coating is performed on a fiber article, the breathability inherent to the fiber article is significantly reduced, causing skin problems such as stuffiness and blurring. Considering such a point, the air permeability of the formation site of the non-skin-side water-repellent region 2 and the non-formation site of the non-skin-side water-repellent region 2 (the site where the air permeability inherent in the pants 1 is substantially maintained. The difference between the air permeability and the air permeability is preferably 5 seconds / 100 ml or less, assuming that the former> the latter.

Further, in the water-repellent imparted pants 10, the bending resistance of the formation site of the non-skin-side water-repellent region 2 is preferably 60 mm or less, more preferably 55 mm or less, and preferably 10 mm or more, more preferably 15 mm or more. . The bending resistance of the formation site of the non-skin-side water-repellent region 2 can also serve as an index of the water-repellent agent adhering portion occupancy ratio of the non-skin-side water-repellent region 2. That is, as the water repellency imparting agent that forms the non-skin-side water repellency region 2 (for example, a modified silicone-based water repellency imparting agent described later), the adhesion amount increases as the adhesion amount increases. When the non-skin-side water-repellent region 2 is formed with such a specific water-repellent agent, the non-skin-side water-repellent region 2 is formed. When the value of the bending resistance of the part is low, specifically, the bending degree of the forming part of the non-skin-side water-repellent region 2 is not substantially different from the bending resistance inherent in the pants 1. Alternatively, when it is smaller than the original value of the bending resistance, it can be determined that the water repellency imparting agent adhesion portion occupancy of the non-skin side water repellent region 2 is high. On the other hand, when the formation site of the non-skin-side water-repellent region 2 is remarkably smaller than the bending resistance inherent in the pants 1, that is, when it is excessively softened so that the stiffness is significantly reduced. Thus, it can be determined that the water repellency imparting agent occupying ratio of the non-skin side water repellent region 2 is too high. In contrast to the modified silicone-based water repellency imparting agent described later, a general water-repellent coating agent has a reduced adhesion flexibility in proportion to an increase in the adhesion amount. This is because a resin film is formed. The bending resistance is measured by the following method.

<Measurement method of bending resistance>
The bending resistance is measured according to JIS L 1096 “8.21. Bending softness measurement method” A method (45 ° cantilever method). However, due to the preparation of the measurement sample (sampling), this measurement method measures only the longitudinal bending resistance of the measurement sample. If the measurement sample has wrinkles or creases, the measurement sample is ironed to eliminate the wrinkles or creases before measurement, and then left to stand in the measurement environment for a day and night.

Further, from the viewpoint of preventing an excessive amount of the water repellency imparting agent from being present in the non-skin side water repellent region 2 and setting the water repellency imparting agent adhering portion occupation ratio to an appropriate range, the non-skin side water repellent region 2 has a bending resistance of 60 mm or less as described above, and further, a portion where the non-skin-side water-repellent region 2 is not formed in the water-repellent imparted pants 10 (pants 1), that is, the water-repellent property. It is preferable that it is equal to or smaller than the bending resistance of the region non-formation portion. More specifically, the difference between the bending resistance of the water-repellent region non-forming portion and the bending strength of the formation portion of the non-skin-side water-repellent region 2 is preferably the former-the latter, assuming that the former> the latter. It is 0 to 25 mm, more preferably 0 to 20 mm.

In the treatment method of the present invention, it is essential to impart a water repellency imparting agent to the non-skin facing surface of the fiber article, but a water repellency imparting agent is imparted to the skin facing surface of the fiber article. It may not be necessary, or a smaller amount of water repellency-imparting agent than the non-skin facing surface of the fiber article may be applied. By providing a water repellency imparting agent to the skin-facing surface of the fiber article, the effect of reducing the stickiness of the user's skin is achieved.

Hereinafter, the water repellency imparting agent used in the present invention will be described.
The water repellency imparting agent used in the present invention can impart water repellency (waterproofness) to a fiber article, and can form a non-skin side water repellency region in which the contact angle with water and the water absorption speed are in the specific range. Is required.
Further, in the water-repellent imparted fiber article obtained by the treatment method of the present invention, as described above, the part of the fiber article that overlaps the non-skin-side water-repellent area in a plan view and more than the non-skin-side water-repellent area. Where it is preferable that a “water absorption layer” in which the water absorption inherent in the fiber article is maintained is present on the side close to the user's skin, one side of the fiber article (non-skin facing surface) When a water repellency imparting agent is applied from the side by spraying or the like, it is difficult to secure such a water absorbing layer if the imparted water repellency imparting agent migrates to the other surface (skin facing surface) side with good permeability. Furthermore, there is a concern that the air permeability, flexibility, etc. of the fiber article are greatly reduced.
Therefore, in addition to being able to impart water repellency to the fiber article, the water repellency imparting agent has low permeability in the fiber article, and when applied to the fiber article, it remains at and near its application position. (Non-permeable) is required.

Examples of the water repellency imparting agent used in the present invention include a composition containing a modified silicone (modified silicone water repellency imparting agent). The modified silicone functions as a water repellent and is a component that imparts water repellency to the fiber article. Examples of the modified silicone include polyoxazoline-modified silicones and polyether-modified silicones having various molecular weights and branched structures, and one of these can be used alone or in combination of two or more. Among these modified silicones, in particular, polyoxazoline-modified silicones having a dimethylsiloxane structure content of 55% or more and 98% or less, such as silicone units, have water-repellent stability after treatment and wash-off properties by general washing operations. Since it is compatible, it is preferably used in the present invention. The content of the modified silicone in the water repellency imparting agent is preferably 25% by mass or more, more preferably 30% by mass or more, based on the total mass of the water repellency imparting agent, from the viewpoint of obtaining stable water repellency durability. is there. When a composition containing modified silicone is used as a water repellency imparting agent, the surface of the adhesion part (surface of the non-skin-side water-repellent region) of the composition in a fiber article is a component of the composition. Since the modified silicone, which is a main causative substance for imparting water repellency, precipitates preferentially over other components, there is an advantage that the amount of the composition used (attached amount) is relatively small.

The composition containing the modified silicone may contain a volatile solvent in which the modified silicone can be dissolved. That is, the water repellency imparting agent used in the present invention can be a liquid in which a modified silicone is dissolved in a volatile solvent at room temperature and normal pressure, and this liquid water repellency imparting agent is imparted to the non-skin facing surface of the fiber article. A non-skin-side water-repellent region is formed with the above, and the article made of water-repellent imparted fiber of the present invention is obtained. However, in the water-repellent imparted fiber article thus obtained, the volatile solvent contained in the liquid water-repellent imparting agent may be volatilized and not remain. Examples of the volatile solvent include ethanol, methanol, isopropyl alcohol, and water / ethanol mixed liquids of various ratios, and these can be used alone or in combination of two or more. Among these volatile solvents, ethanol is particularly preferably used in the present invention because of its safety and high volatility (quick drying).

The composition containing the modified silicone may contain a water-soluble binder. The water-soluble binder mainly serves to fix the modified silicone, which is a water repellent agent, to the application target (fiber article) of the composition. As this type of binder, there is a water-insoluble binder that does not dissolve in water or hardly dissolves in water, and a water-repellent imparting agent in commercially available waterproof sprays for clothes often contains a water-insoluble binder. However, when a water repellency imparting agent containing a water-insoluble binder is applied to a fiber article, the fiber article is likely to be yellowed, wrinkled, uncomfortable solvent odor, and the washing of the fiber article may be restricted. There is a possibility that the handleability of the fiber article may be lowered. On the other hand, when a water-soluble binder is selected, inconvenience due to the use of such a water-insoluble binder hardly occurs.

Examples of the water-soluble binder include polyvinyl alcohol, acrylic resin, and acrylic resin emulsion, and one of these can be used alone or in combination of two or more. Among these water-soluble binders, various acrylics such as (vinyl methyl ether / butyl maleate) copolymer represented by “Gantrez ES-425” available from Matsumoto Kosho Co., Ltd. Resins are preferably used in the present invention because they are firmly attached to the surface of the fiber article by an ester bond. The strong adhesion of these various acrylic resins to the fiber article by an ester bond is particularly remarkable when combined with a polyether-modified silicone-based water repellency imparting agent, and when combined with a heating operation such as ironing or drying. is there. The content of the water-soluble binder in the water repellency imparting agent is preferably 20% by mass or more, more preferably 30% by mass or more, and preferably 80% by mass or less, based on the total mass of the water repellency imparting agent. Preferably it is 70 mass% or less.

The water repellency (waterproofness) of the water-repellent fiber product obtained by the treatment method of the present invention is removed by washing the water-repellent fiber product article with water according to a conventional method. It is also possible. That is, by washing such a water-repellent imparted fiber article, the water-repellent imparting agent is removed, the non-skin-side water-repellent region disappears, and the original fiber article can be obtained. Such water-repellent fiber articles that can be reset to water repellency by washing are treated as water-repellent treatment (manufacture of water-repellent fiber articles) using fiber repellants. It is particularly useful when implemented privately or at home. That is, for example, “After using a water-repellent fiber article, wash it and store it as the original fiber article, and then if it becomes necessary to impart water repellency to the fiber article, A series of operations of “performing the water-repellent treatment of the fiber article using an imparting agent” can be repeated individually or in the home.

More specifically, the above-mentioned “article made of water-repellent imparted fiber that can reset water repellency by washing” can be defined as follows. That is, a water-repellent fiber-made article is stirred and immersed for 10 minutes in a solution containing 0.1% by mass of a generally available laundry detergent and ion-exchanged water, and then the water-repellent fiber-made article is lightly squeezed. Then, when the water-repellent imparting agent in the water-repellent imparted fiber article after stirring and soaking is immersed in ion-exchanged water for 10 minutes under the condition of a rotation speed of 350 rpm, When the content is 20% by mass or less, the water-repellent fiber-made article is a water-repellent fiber-made article that can be reset by washing. As the above-mentioned “generally available laundry detergents”, surfactants mainly composed of long-chain alkyl ether sulfates can be used, and commercially available detergents for clothing can be generally used. Specifically, for example, “Attack Neo” (registered trademark), which is a detergent for liquid clothing manufactured by Kao Corporation. The above-mentioned “lightly squeeze the water-repellently imparted fiber article” specifically means that a wet fiber article is placed on 20 sheets of filter paper “2” larger than the object and 5 kg This is a method typified by a state in which the whole is pressed once and reciprocated by a roller (width 50 mm).

When supplementing the conditions for washing the water-repellent imparted fiber article, the conditions such as the capacity of the apparatus used to stir and soak the water-repellent imparted fiber article are within the range of the conditions disclosed in this specification. However, as a suitable condition for a single fiber article, a 2 L beaker is used as a device for stirring and immersing the water repellent fiber article, and a 1.5 L washing liquid is used. And the conditions using a rinse liquid can be illustrated. In addition, a stirrer capable of monitoring the number of rotations can be appropriately used for stirring the water-repellent fiber article. Preferably, the magnetic stirrer HS-50D manufactured by AS ONE Co., Ltd. is used, and the AS ONE cloth is used as a stirring bar. A head rotor double (diameter 60 mm, product number 1-5409-07) is used.

FIG. 4 shows an EDS image (observation magnification: 100 times) of a cross section along the thickness direction of a specific example of the water-repellent fiber-imparted article obtained by the treatment method of the present invention. FIG. 5 shows an EDS image of a cross section along the thickness direction of the specific example after the concrete example of the water-repellent fiber-applied fiber article shown in FIG. (Observation magnification 100 times). 4 and 5, the white portion extending in the horizontal direction at the center in the vertical direction of the image is a fiber article (constituent fiber), and in FIG. 4, minute dots (black dots) that are present in the upper half of the white portion. ) Is a water repellency imparting agent, more specifically, element Si contained in a modified silicone water repellency imparting agent which is a kind of water repellency imparting agent. In the specific example of the water-repellent fiber-imparted fiber article before washing shown in FIG. 4, the dots have a relatively large non-skin facing surface side (upper surface side of the sheet in FIG. 4), and the skin facing surface side (FIG. 4). The lower surface side of the inner sheet) is relatively small, and the amount of water repellency imparting agent adhesion decreases as it goes from the non-skin facing surface to the skin facing surface of the fiber article. In this way, by reducing the adhesion amount of the water repellency imparting agent from the non-skin facing surface 1b toward the skin facing surface 1a, the skin facing surface 1a side of the water repellency imparting pants 10 (skin facing surface 1a and its vicinity). Is less affected by the water repellency-imparting agent, so that the touch inherently possessed by the pants 1 is maintained, and is more preferable. And it can be seen that the water repellency imparting agent (element Si derived from the modified silicone water repellency imparting agent) that can be confirmed as a large number of dots (black dots) before washing in FIG. . From this, it can be understood that the specific example of the water-repellent fiber-imparting article of the present invention shown in FIG. 4 is the above-mentioned “water-repellent fiber-imparting article whose water repellency can be reset by washing”.

The residual ratio of the water repellency-imparting agent in the water-repellent property-imparted fiber article after washing can be measured by an extraction method, but can be generally replaced by observation of the liquid absorption status by droplet placement. Specifically, for example, the water-repellent state of the non-skin facing surface (non-skin-side water-repellent region) of the article made of water-repellent fibers is set to the contact angle with water measured by the above method before the washing treatment. Does the material exhibiting a relatively strong water repellency of 80 degrees or more exhibit a contact angle equivalent to the skin facing surface of the article made of water-repellent fiber when the same observation is made on the same surface after washing treatment? Alternatively, when the ion-exchanged water droplet used in the measurement of the contact angle is absorbed from the same surface so quickly that the measurement is impossible, the water repellent imparting agent remaining rate on the same surface can be determined to be zero.

The above-mentioned “article made of water-repellent fiber capable of resetting water repellency by washing” is obtained by using the water-soluble binder as a binder to be contained in the water-repellent agent. In addition, the above-mentioned “article made of water-repellent fiber that can reset water repellency by washing” includes, as a water-repellent agent, a modified silicone-based water-repellent agent having a hydrophilic side chain made of a hydrophilic polymer as a modifying group. In this case, all of the water repellency imparting agent used may be the modified silicone water repellency imparting agent, or the main component of the water repellency imparting agent used is the modified silicone water repellency imparting agent. Further, a smaller amount of water repellency imparting agent may be used in combination. In this modified silicone-based water repellency-imparting agent, the content ratio of the hydrophilic side chain to the silicone main chain is preferably 55% by mass or more and 98% by mass or less.

In the article made of water-repellent imparted fiber obtained by the treatment method of the present invention, one or more selected from the group consisting of a deodorant component, a fragrance component, an antibacterial agent, a bactericidal agent and a refreshing agent is taken as a countermeasure against odor as necessary. You may make it contain. These deodorizing components and the like may be contained in a fiber article constituting the water-repellent imparted fiber article, or may be contained in the non-skin-side water-repellent region. For example, in a water-repellent imparted fiber article obtained by applying a water repellency-imparting agent (a composition containing a modified silicone) containing a deodorant component or the like to a fiber article not containing a deodorant component or the like, A deodorant component or the like is contained at least in the non-skin-side water-repellent region, and the fiber article further contains a deodorant component or the like depending on conditions for applying the water repellency imparting agent. These odor countermeasures are also preferable from the viewpoint of suppression effects such as skin irritation. It is preferable to determine which of the above components is used as an odor countermeasure in consideration of the influence of safety on the body at the use site of the component in the user's body.

Examples of the deodorizing component and the deodorizing component include known deodorizing agents such as activated carbon, silica gel, zeolite, layered structured particles composed of zirconium phosphate, three-dimensional structured particles composed of silicate, and zinc oxide. These 1 type can be used individually or in combination of 2 or more types.

As the fragrance component, an appropriate amount of any of natural fragrance and synthetic fragrance may be used. For example, green tea, benzoin, clove oil, jasmine absolute, mate tea, mimosa, musk tonkin, frankincense, rosemary oil, sandalwood oil Natural fragrances such as vetiver oil and violet leaf absolute, higher alcohols, aldehydes, benzaldehyde, benzoic acid, cinnamic acid, cinnamic aldehyde, cinnamic alcohol, coumarin, esters, indoles, ketones, salicylic acid and related compounds, terpenoids, Various synthetic fragrance | flavors, such as vanillin, are mentioned, These 1 type can be used individually or in combination of 2 or more types.

Examples of the antibacterial agent and the bactericidal agent include known antibacterial and bactericidal substances, such as silver, copper, zinc, silica, activated carbon, aluminosilicate compound, zeolite, electrolytes that can be used as a hygroscopic material, alcohols, and aldehydes. , Phenol, hydrogen peroxide, chlorine, hypochlorite, or surfactant, and the like can be used alone or in combination of two or more.

As the refreshing agent, for example, those described in Japanese Patent No. 6121269 can be used as appropriate. By including a refreshing agent in the water repellency-imparting fiber article, a refreshing feeling and a dry feeling can be imparted and the comfort can be further improved.

In the treatment method of the present invention, the method of applying the water repellency-imparting agent to the fiber article is not particularly limited, and the agent application means may be a contact type that contacts the fiber article when the agent is applied, A non-contact type that does not contact the article may be used. As described above, from the viewpoint of air permeability, flexibility, and the like, the adhesion pattern of the water repellency imparting agent in the non-skin-side water-repellent region is such that the water-repellent imparting agent is continuously applied to the entire non-skin-side water-repellent region without any gap. It is preferable that the adhering part and the non-adhering part of the water repellency imparting agent are mixed rather than the existing pattern (so-called solid coating of the water repellency imparting agent), and from the viewpoint of reliably obtaining this mixed pattern, the water repellency of the present invention. In the method for producing an imparted fiber article, the application of the water repellency imparting agent to the fiber article is preferably performed by spraying the water repellency imparting agent using a non-contact type agent imparting means such as a spray.

As one of the agent applying means that can be used in the treatment method of the present invention, there is a pump spray type agent applying means obtained by filling a container having a sprayer with a water repellency-imparting agent (a composition containing a modified silicone). . In the present invention, conventionally known pump spray type agent applying means can be used without any particular limitation.

Further, as another agent providing means that can be used in the treatment method of the present invention, an aerosol spray formed by filling a water-repellent imparting agent (composition containing modified silicone) and a propellant in a pressure-resistant container for aerosol spray. Examples include formulating agent providing means. In the present invention, conventionally known aerosol spray type agent application means can be used without particular limitation. Examples of the propellant include those using a compressed gas such as nitrogen gas and carbon dioxide, and those using a liquefied gas such as liquefied petroleum gas (LPG) and dimethyl ether (DME).

Furthermore, as another agent providing means that can be used in the treatment method of the present invention, a manual type formed by filling a container having a manual sprayer with a water repellency imparting agent (a composition containing a modified silicone). A spray-type agent provision means is mentioned. This manual spray-type agent application means is a sprayer that does not use a propellant such as gas. Specifically, for example, a manual trigger sprayer and an ultrasonic type can be exemplified, and in particular, an accumulator-type manual spray The formulating agent imparting means is suitably used in the present invention because it has good mist particle size fineness, mist diameter uniformity, and the like. Moreover, the method of spraying using compressed air etc. with the container provided with the compression means as an example of the usage method of a manual spray type agent provision means can also be used.

Further, as another agent providing means that can be used in the processing method of the present invention, it is configured to include a stick-shaped solid of a water repellency imparting agent (composition containing a modified silicone), and the solid is treated. The thing which can be apply | coated to this process target by making this water repellency imparting agent by making it contact with a target is mentioned. The agent applying means including the stick-like solid is configured in the same manner as, for example, lipstick or stick glue, and includes a stick-like solid of a water repellency-imparting agent and a support portion that supports the solid.

In addition to the above-mentioned methods, the method for applying and attaching the water repellency imparting agent to the fiber article is dipping in the solution, dipping method, transfer method, die coating, gravure coating, ink jet method, screen printing method, etc. Examples thereof include coating using a known liquid coating apparatus such as coating according to printing, and these can be used freely. Further, by solidifying the water repellency imparting agent, for example, a method of applying the water repellency imparting agent by bringing the water repellency imparting agent solidified in a stick shape as described above into direct contact with a fiber article, or a sponge. It is possible to employ a method of indirectly applying to a fiber article using the above. In particular, a method for applying and attaching a water repellency imparting agent using an aerosol sprayer, a manual trigger sprayer, an ultrasonic wave or the like is more preferable because the user can easily form a water repellent layer. In addition, when applying the water repellency imparting agent, in order to control the permeability, the viscosity of the blended composition containing the water repellency imparting agent, the pressure applied to a fiber article such as a fabric, the printing speed, etc. are appropriately adjusted. There is a need to.

Furthermore, another one of the agent providing means usable in the treatment method of the present invention is a roll-on type agent providing means in which a roll-on container is filled with a water repellency-imparting agent (a composition containing a modified silicone). It is done. The roll-on container is a container in which an inner stopper that rotatably holds a ball is disposed at the container mouth, and the contents (water repellency imparting agent) are distributed on the surface of the ball and applied to a desired site. When using the roll-on container, the container body is lifted upward while bringing the ball into contact with the non-skin facing surface of the fiber article to which the contents are to be applied, and the contents are brought into contact with the balls. By rolling on the skin facing surface, the contents are distributed on the ball surface. As the roll-on container, a known container can be used without particular limitation.

The treatment method of the present invention is basically a simple process of simply applying a water repellency-imparting agent to the non-skin facing surface of a fiber article having water absorption, and the body fluid excreted from the body oozes out into the clothing. Therefore, it is possible to effectively prevent the inconvenience that can be visually recognized from the outside. Therefore, in addition to industrial implementation using the equipment as described above, it is possible to use personally or at home without using such equipment. It can also be applied to the implementation of When the treatment method of the present invention is carried out personally or at home, the application of the water repellency imparting agent using the various agent imparting means is performed manually. The various agent applying means are suitable for carrying out the treatment method of the present invention individually or in the home. In particular, the application / attachment of a water repellency imparting agent using an aerosol sprayer, a manual trigger sprayer, ultrasonic waves, or the like is more preferable because the user can easily form a water repellent layer.

The agent application means used in the treatment method of the present invention may be provided with information on how to use the agent application means so as to be visible from the outside. In particular, when the processing method of the present invention is carried out personally or at home, the agent application means used by the user is provided with such information so as to be visible from the outside. Can be effectively prevented from being mistakenly used, and the water repellent operation of the fiber article can be carried out smoothly.

Further, in the treatment method of the present invention, the fiber article may be dried after imparting a water repellency imparting agent to the fiber article. The water repellency imparting agent may be dried by heating, may be dried by reduced pressure, or may be forced or natural drying in which heating and reduced pressure are combined. In the case of drying by heating, it is preferable to dry as long as the substrate of the fiber article and the water repellency imparting agent are not damaged. In particular, when the water repellency-imparting agent to be applied to the fiber article is a liquid material in which the modified silicone is dissolved in the volatile solvent, the volatile solvent is surely removed by introducing such a drying step. can do. In that case, the drying condition of the fiber article after the application of the water repellency-imparting agent may be appropriately set according to the components of the water repellency-imparting agent including the volatile solvent. The fiber article can be dried under the condition that the product temperature of the imparted water repellency imparting agent is 70 ° C. or less, from the viewpoint of sufficiently exhibiting the functions of the imparted water repellency imparting agent and achieving both air permeability and water repellency. Preferably, drying at a temperature of 50 ° C. or lower is more preferable from the viewpoint of shrinking the size of the fiber article and preventing impregnation of the water repellency imparting agent into the fiber article.

The above-mentioned preferred embodiment can be realized by devising the composition and application method of the water repellency-imparting agent. For example, when the water repellency imparting agent is a spray preparation, the water repellency imparting agent is selectively adhered to the non-skin facing surface of the fiber article to maintain the water absorption of the opposite skin facing surface. In addition, the ratio of the volatile solvent to the binder is 80% by mass or less, and the spray propellant (gas agent) is 50% by mass or more of dimethyl ether capable of dissolving the modified silicone. It is preferable to devise so that the water repellency-imparting agent adheres to the surface (non-skin facing surface) of the fiber article with a high viscosity / fast drying property as 1 to 3 times the weight. It is also preferable to alert the spray to be sprayed within 15 reciprocations within 15 cm or more.

The water-repellent fiber-imparted fiber article obtained by applying the treatment method of the present invention to the fiber article is, as described above, the water-absorbing property inherent to the fiber article and the imparted water-repellent agent (non-skin It has water repellency due to the side water repellency region, and can be applied to various uses by taking advantage of such characteristics. For example, underwear such as pants, heels, shirts, bras, girdles, socks Representative inner clothing: soccer shirt, golf shirt, tennis shirt, basket shirt, table tennis shirt, badminton shirt, running shirt, soccer pants, tennis pants, basket pants, table tennis pants, badminton pants, running pants, golf pants, various sports Undershirts, various sports innerwear, sweaters, T-shirts, jerseys, Can be applied to sports apparel such as rainers, windbreakers, shorts, leggings, etc .; light incontinence items such as pads for urine leakage treatment, sanitary napkins, panty liners, seats, breast milk pads, etc. . Further, the formation site of the non-skin-side water-repellent region in such a water-repellent fiber-made article may be appropriately set according to the use of the water-repellent fiber-made article, at least on the non-skin facing surface of the fiber article. In this application, it may be set to a part corresponding to a part where liquid oozing is expected, for example, a excretory part such as a penis, an armpit, a back, a crotch part, a hip part, or a nipple part.

The urine leakage treatment pad typically has a top sheet relatively positioned near the wearer's skin, a back sheet relatively positioned far from the wearer's skin, and between both sheets. When the urine leakage treatment pad is worn, the back sheet can come into contact with outer clothing such as trousers. Therefore, when the treatment method of the present invention is applied to a urine leakage treatment pad, a non-skin-side water-repellent region is formed by applying a water repellency imparting agent to the outer surface (non-skin facing surface) of the back sheet of the pad. do it.

As mentioned above, although this invention was demonstrated based on the embodiment, this invention can be changed suitably, without being restrict | limited to the said embodiment.
In other words, the method for treating a fiber article of the present invention described above is a method for producing a water-repellent fiber article. In the present invention, “the skin facing surface that has water absorption and is disposed on the side relatively close to the user's skin when in use, and the non-skin facing that is disposed on the side relatively far from the user's skin” By applying a water repellency imparting agent to the non-skin facing surface of the fiber article having a surface using an agent imparting means, the non-skin facing surface side in the thickness direction of the fiber article is selectively made water-repellent. A method for producing a water-repellent fiber-made article having a water repellency step ”is included.
The following additional notes are disclosed with respect to the embodiment of the present invention described above.

<1>
Made of fiber that has water absorption and has a skin facing surface that is disposed on the side relatively closer to the user's skin during use and a non-skin facing surface that is disposed on the relatively far side from the user's skin. In the article, when another fibrous article is further worn from above in a state where the fibrous article is worn, the body fluid of the user absorbed from the skin facing surface of the fibrous article is made of the other fibrous article. A method for treating a fiber article for preventing transition to an article, comprising:
Water repellent that selectively repels the non-skin facing surface in the thickness direction of the fiber article by applying a water repellency imparting agent to the non-skin facing surface of the fiber article using an agent-imparting means. A method for treating a fiber article, comprising a step.

<2>
In the water repellency step, a water-repellent region including the water repellent imparting portion is formed on the non-skin-facing surface of the fiber article, and the water-repellent region of the fiber article is viewed in plan view. The method for treating a fiber article according to <1>, wherein at least a part of the overlapping part and the part closer to the skin facing surface of the fiber article than the water-repellent region maintains the water absorption.
<3>
The method for treating a fiber article according to <1> or <2>, wherein the water absorption is a water absorption time of 30 seconds or less according to a dropping method of JIS L-1907.
<4>
Any one of the above items <1> to <3>, wherein the surface of the water repellent imparting portion on the non-skin facing surface of the fiber article has a contact angle with water of 80 degrees or more and a water absorption speed of 10 seconds or more. A method for treating a fiber article according to claim 1.
<5>
The method for treating a fiber article according to any one of <1> to <4>, wherein the water repellency-imparting agent is a composition containing a modified silicone.
<6>
The method for treating a fiber article according to <5>, wherein the composition contains a volatile solvent in which the modified silicone can be dissolved.
<7>
The method for treating a fiber article according to <5> or <6>, wherein the composition contains a water-soluble binder.

<8>
The fiber article according to any one of <1> to <7>, wherein the agent application unit is a pump spray type agent application unit in which a container having a sprayer is filled with the water repellency imparting agent. Processing method.
<9>
The agent applying means according to any one of <1> to <7>, wherein the agent applying means is an aerosol spray-type agent applying means formed by filling a pressure-resistant container for aerosol spray with the water repellency-imparting agent and a propellant. A method for treating textile articles.
<10>
The <1> to <9>, wherein the agent application unit is a manual spray type agent application unit in which the water repellent agent is filled in a container having a manual sprayer. Method for treating textile articles.
<11>
The agent providing means is configured to include a stick-like solid of the water repellency imparting agent, and the water repellency imparting agent can be applied to the treatment target by bringing the solid into contact with the process target. The method for treating a fiber article according to any one of <1> to <7>.
<12>
The method for treating a fiber article according to any one of <1> to <7>, wherein the agent application unit is a roll-on type agent application unit in which the water-repellent agent is filled in a roll-on container.

<13>
The method for treating a fiber article according to any one of <1> to <12>, wherein the agent applying unit is provided with information relating to a method of using the agent applying unit so as to be visible from the outside.
<14>
The method for treating a fiber article according to any one of <1> to <13>, wherein the application of the water repellency imparting agent using the agent imparting means is performed manually.
<15>
The method for treating a fiber article according to any one of <1> to <14>, wherein the fiber article is used as an inner garment.
<16>
The method for treating a fiber article according to any one of <1> to <14>, wherein the fiber article is used as sports clothing.
<17>
The method for treating a fiber article according to any one of <1> to <14>, wherein the fiber article is used as a urine leakage treatment pad.

ADVANTAGE OF THE INVENTION According to this invention, the processing method of the textile article which can prevent effectively the inconvenience which the bodily fluid excreted from the body oozes out to clothing and becomes visible from the outside is provided.
The article made of water repellency imparting fibers obtained by the treatment method of the present invention basically has a simple configuration in which a water repellency imparting agent is attached to a base fiber article, and the water repellency imparting fibers Since the appearance and basic performance of the manufactured article are not substantially different from those originally possessed by the fiber article, the third party should be aware of this while taking measures to prevent exudation of body fluids. In addition, it is excellent in texture and feel as a fiber article.

Claims

Made of fiber that has water absorption and has a skin facing surface that is disposed on the side relatively closer to the user's skin during use and a non-skin facing surface that is disposed on the relatively far side from the user's skin. In the article, when another fibrous article is further worn from above in a state where the fibrous article is worn, the body fluid of the user absorbed from the skin facing surface of the fibrous article is made of the other fibrous article. A method for treating a fiber article for preventing transition to an article, comprising:
Water repellent that selectively repels the non-skin facing surface in the thickness direction of the fiber article by applying a water repellency imparting agent to the non-skin facing surface of the fiber article using an agent-imparting means. A method for treating a fiber article, comprising a step.
In the water repellency step, a water-repellent region including the water repellent imparting portion is formed on the non-skin-facing surface of the fiber article, and the water-repellent region of the fiber article is viewed in plan view. The method for treating a fiber article according to claim 1, wherein at least a part of the overlapping part and the part closer to the skin facing surface of the fiber article than the water-repellent region maintains the water absorption.
The method for treating a fiber article according to claim 1 or 2, wherein the water absorption is a water absorption time of 30 seconds or less by a dropping method of JIS L-1907.
The surface of the application portion of the water repellency-imparting agent on the non-skin facing surface of the fiber article has a contact angle with water of 80 degrees or more and a water absorption speed of 10 seconds or more. The processing method of the fiber goods as described in any one of.
The method for treating a fiber article according to any one of claims 1 to 4, wherein the water repellency imparting agent is a composition containing a modified silicone.
The method for treating a fiber article according to claim 5, wherein the composition contains a volatile solvent in which the modified silicone can be dissolved.
The method for treating a fiber article according to claim 5 or 6, wherein the composition contains a water-soluble binder.
The method for treating a fiber article according to any one of claims 1 to 7, wherein the agent application unit is a pump spray type agent application unit in which a container having a sprayer is filled with the water repellency imparting agent. .
The fiber article according to any one of claims 1 to 7, wherein the agent application unit is an aerosol spray type agent application unit in which a water-repellent agent and a propellant are filled in a pressure-resistant container for aerosol spray. Processing method.
The fiber product according to any one of claims 1 to 9, wherein the agent application unit is a manual spray type agent application unit in which a container having a manual sprayer is filled with the water repellency imparting agent. Article processing method.
The agent-imparting means is configured to include a stick-shaped solid of the water-repellent imparting agent, and the water-repellent imparting agent can be applied to the treatment target by bringing the solid into contact with the process target. Item 8. The method for treating a fiber article according to any one of Items 1 to 7.
The method for treating a fiber article according to any one of claims 1 to 7, wherein the agent application unit is a roll-on type agent application unit in which a roll-on container is filled with the water repellency-imparting agent.
The method for treating a fiber article according to any one of claims 1 to 12, wherein information relating to a method of using the agent applying means is provided in the agent applying means so as to be visible from the outside.
The method for treating a fiber article according to any one of claims 1 to 13, wherein the application of the water repellency imparting agent using the agent imparting means is performed manually.
The method for treating a fiber article according to any one of claims 1 to 14, wherein the fiber article is used as an inner garment.
The method for treating a fiber article according to any one of claims 1 to 14, wherein the fiber article is used as sports clothing.
The method for treating a fiber article according to any one of claims 1 to 14, wherein the fiber article is used as a urine leakage treatment pad.