JP2015206152A - moisture permeable waterproof fabric - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a moisture-permeable waterproof fabric having excellent flexure resistance and wear resistance.SOLUTION: There is provided a moisture-permeable waterproof fabric having a polyurethane resin layer containing 5 to 50 mass% of polytetrafluoroethylene fine particles on at least one surface of a fiber cloth. The resin layer is preferably obtained by laminating a perforated layer, an unperforated layer or a perforated layer and an unperforated layer in this order. The use of a predetermined amount of polytetrafluoroethylene fine particles can impart flexure resistance and wear resistance to a fabric and in addition to this, the whole resin layer has high hydrophobicity because polytetrafluoroethylene fine particles are hydrophobic, and thus, an effect of imparting washing durability to waterproof performance (waterproof performance) can be obtained.

Description

  The present invention relates to a moisture-permeable and waterproof fabric.

  A moisture-permeable and waterproof fabric having both moisture permeability and waterproof properties has a function of releasing water vapor generated by perspiration from the body to the outside of clothes and a function of preventing rain from entering the clothes. It is suitably used for cold clothing and cold clothing.

  As such a moisture-permeable and waterproof fabric, a high-density woven fabric in which yarns are woven at high density, or a resin layer made of resin such as polyurethane, polyester, polyamide, or polytetrafluoroethylene is formed on one side of a fiber fabric. Moist waterproof fabrics are well known. Among these, polyurethane resins are preferably used from the viewpoint of versatility, cost, and performance.

A moisture-permeable waterproof fabric provided with a resin layer is usually a coating method in which a resin layer is directly formed on a fiber fabric as a porous layer or a non-porous layer, or once a resin layer is formed on a release substrate such as a release paper. It is manufactured by a laminating method or the like in which it is formed and bonded to a fiber fabric.
In recent years, from the viewpoint of cost reduction, there is an increasing number of cases that are used as so-called single sheets that use a moisture-permeable and waterproof fabric without a lining, and accordingly, wear resistance of the resin layer is emphasized. Tend to be.

  Thus, Patent Documents 1 to 3 disclose means for improving the wear resistance of the resin layer.

JP-A-2-281194 JP-A-3-213582 Japanese Patent Laid-Open No. 4-194082

  In the inventions described in Patent Documents 1 to 3, an effect of improving the wear resistance is recognized to some extent in the resin layer. However, in these inventions, since the wear resistance is improved by using a plate-like powder, it shows durability against unidirectional wear such as rubbing on the surface of the resin layer. At the same time, sufficient durability is not obtained with respect to wear that encases the entire resin layer.

  The present invention has been made in view of such a current situation, and an object of the present invention is to provide a moisture-permeable and waterproof fabric excellent in weather resistance and wear resistance.

  As a result of intensive studies to achieve the above object, the present inventors have found that when a predetermined amount of polytetrafluoroethylene fine particles are contained in the resin layer, the friction coefficient is reduced, thereby providing excellent weather resistance. The inventors have found that wear resistance is exhibited, and have come to make the present invention.

  That is, this invention consists of the following structures.

(1) A moisture-permeable and waterproof fabric characterized in that a polyurethane resin layer containing 5 to 50% by mass of polytetrafluoroethylene fine particles is provided on at least one surface of the fiber fabric.
(2) The moisture-permeable and waterproof fabric according to (1), wherein the resin layer is a perforated layer.
(3) The moisture-permeable and waterproof fabric according to (1), wherein the resin layer is a non-porous layer.
(4) The moisture permeable and waterproof fabric according to (1), wherein the resin layer has a structure in which a porous layer and a nonporous layer are laminated in this order on a fiber fabric.

  Of course, the moisture-permeable and waterproof fabric of the present invention is excellent in moisture-permeable and waterproof performance, and is also excellent in weather resistance and abrasion resistance. For this reason, even if it is used as a single sheet without a lining, it is possible to provide one that can sufficiently withstand the use.

  In the present invention, by using a predetermined amount of polytetrafluoroethylene fine particles, it is possible to impart weather resistance and abrasion resistance to the fabric. However, the polytetrafluoroethylene fine particles are hydrophobic particles. Therefore, the entire resin layer becomes strongly hydrophobic, and as a result, the effect of giving washing durability to waterproof performance (water pressure resistance) is also exhibited.

  Hereinafter, the present invention will be described in detail.

  The moisture-permeable and waterproof fabric of the present invention includes a polyurethane resin layer on at least one surface of the fiber fabric.

  The fiber fabric in the present invention is used as a base fabric. Examples of fiber fabrics include polyamide synthetic fibers represented by nylon 6 and nylon 66, polyester synthetic fibers represented by polyethylene terephthalate, synthetic fibers such as polyacrylonitrile synthetic fibers, polyvinyl alcohol synthetic fibers, and triacetate. Examples thereof include woven fabrics, knitted fabrics and nonwoven fabrics made of semi-synthetic fibers or mixed yarns such as nylon 6 / cotton and polyethylene terephthalate / cotton.

  In order to obtain the moisture-permeable and waterproof fabric of the present invention, a polyurethane resin layer is formed on the prepared fiber fabric. However, before forming the resin layer, the fiber fabric is subjected to a water-repellent finish beforehand. Good. Thereby, at the time of resin layer formation, it becomes difficult for the resin solution mentioned later to osmose | permeate the inside of a fiber fabric.

  The water-repellent treatment can be performed at any stage as long as it is after weaving, but it is usually preferable to perform it after scouring and dyeing. The water repellent finish may be performed based on a padding method, a coating method, a gravure coating method, a spray method, or the like. Examples of the water repellent used in the processing include paraffinic water repellent, polysiloxane water repellent, and fluorine water repellent. Among these, a fluorine-based water repellent is preferable from the viewpoint of water repellency durability. Examples of the fluorine-based water repellent include "Asahi Guard AG-E081 (trade name)", "Asahi Guard AG-E082 (trade name)", "Asahi Guard AG-E500D (trade name)" manufactured by Asahi Glass Co., Ltd., “Unidyne TG-5521 (trade name)”, “Unidyne TG-5541 (trade name)”, Unidyne TG-5601 (trade name) manufactured by Daikin Industries, Ltd. “NUVAN2114 LIQ (trade name)” manufactured by Clariant Japan KK “NUVAN2116 LIQ (trade name)”.

  Furthermore, in the present invention, for the purpose of improving the water repellency durability, a triazine compound, an isocyanate compound or the like may be used in combination during the water repellency processing. In particular, an isocyanate compound is preferable from the viewpoint of environmental protection, and a blocked isocyanate compound is particularly preferable. Examples of the blocked isocyanate compound include a thermal dissociation type blocked isocyanate compound in which an isocyanate group is blocked with acetoxime, phenol, caprolactam or the like. By using this, the processing stability of the water repellent aqueous dispersion is improved. be able to.

  The amount of the water repellent applied to the fiber fabric is preferably 0.1 to 3% by mass, more preferably 0.3 to 2% by mass in terms of solid content. When the applied amount is less than 0.1% by mass, it is difficult to impart sufficient water repellency to the fiber fabric. On the other hand, when it exceeds 3% by mass, the texture of the moisture-permeable and waterproof fabric is likely to be hard, This is not preferable because it may adversely affect the adhesion to the resin layer or the moisture permeability.

  Further, the fiber fabric may be crushed (calendered) for the purpose of further suppressing the penetration of the resin solution into the fiber fabric. The crushing process is not particularly limited, but generally, a woven or knitted fabric is run between a mirror roll having a temperature control function and a cotton roll or a plastic roll to crush the surface in contact with the mirror roll. . Usually, a resin layer is formed on the crushing surface. The crushing process may be performed using a known calendar machine.

  In the present invention, the resin layer is formed using a polyurethane resin. As the polyurethane resin, those obtained by reacting a polyisocyanate component and a polyol component are suitable. As the polyisocyanate component, aromatic diisocyanate, aliphatic diisocyanate, alicyclic diisocyanate and the like are used alone or in combination. Specifically, tolylene-2,4-diisocyanate, 4,4′-diphenylmethane diisocyanate, 1,6-hexamethylene diisocyanate, 1,4-cyclohexane diisocyanate, or trifunctional or higher polyisocyanate is used alone or in combination. Used. On the other hand, as a polyol component, polyether polyol, polyester polyol, etc. are used, for example. As the polyether polyol, polyethylene glycol, polypropylene glycol, polytetraethylene glycol or the like is used. As the polyester polyol, a reaction product of a diol such as ethylene glycol or propylene glycol and a dibasic acid such as adipic acid or sebacic acid, or a ring-opening polymer such as caprolactone can be used. A polymer of the prepolymer can also be used. In the present invention, particularly when the resin layer is a non-porous layer, the polyoxyethylene group derived from polyethylene glycol, polyoxypropylene polyoxyethylene copolymer, etc., within a range that does not affect the stability and tag feel of the resin layer. It is preferable to use a polyurethane resin containing a relatively large amount of water, and further improvement in moisture permeability can be expected.

  In the present invention, a polyurethane resin is used as the resin for forming the resin layer as described above, but other resins may be used in combination as long as the effects of the present invention are not impaired. Examples of other resins include polyacrylic acid, polyvinyl chloride, polystyrene, polybutadiene, polyamino acid, polycarbonate, and the like, and copolymers thereof or those modified with fluorine or silicon can also be used. As content of other resin, it is preferable to set it as 20 mass% or less with respect to 100 mass% of resin layers.

  Moreover, it does not specifically limit as a form of a resin layer, What kind of thing may be sufficient as long as it contributes to realization of moisture-permeable waterproof performance. For example, a porous layer, a nonporous layer, a laminated form of a porous layer and a nonporous layer, and the like can be given.

  In the case of a perforated layer, any layer that prevents rainwater with a diameter of 50 to 3000 μm and allows perspiration water vapor with a diameter of 0.0004 μm to pass through may be used, and the production method is not particularly limited, but generally, a layer obtained by a wet method is preferable. Specifically, a polyurethane resin solution containing a polar solvent such as N, N-dimethylformamide is applied to the fiber fabric, and then placed in water at 5 to 30 ° C. or a mixed solution of water and N, N-dimethylformamide for 30 seconds. Immerse for ~ 5 minutes to solidify resin solids. Then, it can be set as a porous layer by washing with water at 30-80 degreeC for 1-10 minutes as needed, and drying.

  As a film forming method other than the wet method, a polyurethane resin is dissolved or dispersed in an organic solvent such as methyl ethyl ketone to form an oil phase, and water is subsequently stirred and dispersed using an emulsifier to form a water-in-oil polyurethane emulsion. And then apply the emulsion to a fiber fabric to form a dry film. Also, a mixed resin solution is prepared using water-soluble polyurethane resin, self-emulsifiable polyurethane resin or oil-in-water polyurethane emulsion as the main agent, and easily soluble polyurethane resin that can be eluted with warm water, glue or starch as a secondary agent. Then, this may be applied and dried to form a resin film, and then the secondary agent may be eluted by soaping with warm water of 30 to 80 ° C. for about 5 to 15 minutes using a washing machine or a dyeing machine. . Furthermore, it is good also as a porous layer by apply | coating water-soluble or solvent-type polyurethane-type resin which mixed the gas foaming agent, and making it foam mechanically or chemically.

In the case of a porous layer, the amount of formation may be appropriately determined in consideration of the resin properties and various performances. Usually, it may be about 3 to 50 g / m ^{2 in} terms of solid content, and 10 to 40 g / m. ² is preferred. If the formation amount is less than 3 g / m ² , it tends to be difficult to obtain an appropriate waterproof performance. On the other hand, if it exceeds 50 g / m ² , it is not preferable because it tends to cause a decrease in moisture permeability and a texture hardening.

  In the present invention, the resin layer may be a non-porous layer. Improvement of waterproof performance can be expected by using a non-porous layer.

  In the case of a non-porous layer, the production method is not particularly limited. For example, a solvent-type polyurethane resin, a water-soluble polyurethane resin, or a self-emulsifying polyurethane resin may be applied to a fiber fabric to form a dry film, or the resin solution may be once applied to a release material such as release paper and dried. After forming the film, the release material may be peeled off by bonding to the fiber fabric via the adhesive layer.

In the case of forming a non-porous layer, it is preferable to use a polyurethane resin in which a large amount of an ether component derived from polyalkylene glycol is introduced into the polymer because moisture permeability is improved.
As a formation amount of a non-porous layer, 1-20 g / m < ² > is preferable in conversion of solid content, and 5-15 g / m < ² > is more preferable. Is less than the amount of coating is 1 g / m ^2, they tend to be obtaining appropriate waterproof becomes difficult, while when exceeding 20 g / m ^2, there is a tendency that moisture permeability is greatly reduced undesirably.

As the coater for forming the non-porous layer, when the formation amount is less than 10 g / m ^{2 in} terms of solid content, it is preferable to use a gravure coater, a reverse coater, a knife coater, or the like from the viewpoint of film forming property. In the case of 10 g / m ² or more, a comma coater or the like is preferable. The conditions for drying and curing may be appropriately set in consideration of the solid content concentration and the formation amount of the fiber fabric and the resin solution.

  In addition, the resin layer in the present invention may be a laminate of a plurality of layers having different forms, and the composition of each layer may be the same or different. In particular, in the present invention, a form in which a porous layer and a non-porous layer are laminated is preferable from the viewpoint of moisture permeability and waterproof performance and texture. Among them, a form in which a porous layer and a nonporous layer are laminated in this order on a fiber fabric is preferable. In this case, the porous layer is formed by a wet method and a solvent-type polyurethane resin or a water-soluble polyurethane resin is not used. It is preferable to form the non-porous layer as thin as possible so that the moisture permeation performance does not deteriorate so much by using the porous layer.

  Further, when the fiber fabric is a thin fabric composed of fine yarns of 33 dtex or less, for example, the resin solution may penetrate deeply into the fiber fabric during the resin layer formation process. It is preferable to form a thin layer consisting of a perforated layer or a non-porous layer on the fiber fabric and then apply the resin solution so that the thickness of the entire resin layer satisfies a predetermined range.

  The moisture-permeable and waterproof fabric of the present invention includes the resin layer as described above on at least one side of the fiber fabric. The resin layer has a polytetrafluoroethylene fine particle for the purpose of improving weather resistance and wear resistance. Is contained. The polytetrafluoroethylene fine particles may be of any kind and manufacturing method as long as it can reduce the friction coefficient of the resin layer as a result, and the shape may be any of spherical, granular, fibrous, etc. But you can. Generally, it is obtained by an emulsion polymerization method, and the average primary particle diameter is preferably 0.05 to 10 μm, more preferably 0.1 to 5.0 μm, and further preferably 0.1 to 1.0 μm. Is used. When the average particle size is smaller than 0.05 μm, the mechanical properties, that is, the weather resistance and abrasion resistance of the resin layer tend to hardly improve. On the other hand, when the average particle size exceeds 10 μm, the waterproof performance tends to be lowered. In addition, since the fine particles easily settle in the resin solution, the fine particles tend to be unevenly distributed in the resin layer.

  The average molecular weight of polytetrafluoroethylene is preferably about 500,000 to 30 million, more preferably about 3 to 25 million. If it is less than 500,000, the weather resistance and wear resistance tend to hardly improve. On the other hand, those larger than 30 million tend to be difficult to manufacture, and even if manufactured, it is disadvantageous in terms of cost.

In addition, an average molecular weight is calculated | required from a following formula using a differential scanning calorimeter.
Mn = 2.1 × 10 ¹⁰ × DHc ^−5.16
Here, Mn is the number average molecular weight, DHc is the heat of crystallization (cal / g), and the sample used for the measurement is 5 mg.

  The polytetrafluoroethylene fine particles need to be uniformly contained in the polyurethane resin layer in an amount of 5 to 50% by mass, and preferably 7 to 40% by mass. When the resin layer is composed of a plurality of layers, it is sufficient that at least the outermost layer contains a predetermined amount of polytetrafluoroethylene fine particles.

  Here, when the content of the polytetrafluoroethylene fine particles is less than 5% by mass, the desired weather resistance and wear resistance are not expressed, and when it exceeds 50% by mass, the moisture permeability is likely to be reduced, and The viscosity of the resin solution becomes unstable, leading to a decrease in the quality of the resin layer and a decrease in the quality of the moisture-permeable and waterproof fabric.

  Furthermore, since the polytetrafluoroethylene fine particles are hydrophobic particles, by using this, hydrophobicity is imparted to the entire resin layer, and waterproof performance excellent in washing durability is realized.

  Further, the resin layer in the present invention may contain other fine particles as necessary. Other fine particles include inorganic fine particles such as silicon dioxide, magnesium oxide, calcium carbonate, magnesium carbonate, and titanium oxide, heat-resistant organic fine particles such as cross-linked acrylic, cross-linked polystyrene, and L-lysine, surfactants, water repellents, and various types. A filler etc. are mention | raise | lifted and a quality etc. can be improved by using these. The other fine particles are used alone or in combination, and the amount used is preferably within a range not exceeding the amount of polytetrafluoroethylene fine particles used. In addition, when other fine particles are used in combination, it is possible to suppress sedimentation in the resin solution by using particles having different particle sizes and shapes, and to improve the weather resistance and wear resistance in multiple directions of the resin layer. It can also be improved.

In the present invention, it is preferable to use L-lysine in combination as other fine particles. L-lysine is a kind of flaky substance that acts as a reinforcing material in the resin layer. By using this in combination, the resin layer is peeled off in a lump when it is rubbed. Can be suppressed.
In the present invention, after the resin layer is formed, the silicon compound such as polydimethylsiloxane, the fluorine compound such as the fluorine-based water repellent, and the fluorine-based surfactant is adhered to the surface of the resin layer. It may be improved.

Furthermore, with respect to the moisture-permeable waterproof performance, which is a basic effect of the present invention, the water-proof pressure as an index of waterproof performance is 10 kPa or more, and the moisture permeability as an index of moisture-permeable performance is 4000 g / m ² · 24 hrs or more. preferable. In particular, it preferably has a water pressure resistance of 50 kPa or more and a moisture permeability of 6000 g / m ² · 24 hrs or more. The measurement of water pressure resistance is based on JIS L1092 (high water pressure method), and the measurement of moisture permeability is based on JIS L1099A-1 method (calcium chloride method).

EXAMPLES Hereinafter, although an Example and a comparative example are given and this invention is demonstrated in detail, this invention is not limited to these.
The measurement and evaluation of the performance of the fabric was performed by the following method.

(1) Washing durability The water pressure resistance of the fabric after washing 100 times according to JIS L0217 (Method 103) was measured.

(2) Scratch resistance (water pressure resistance after stagnation)
The measurement was made with reference to the description of JIS K6722. In other words, after preparing a 15 cm square test piece, the test piece was folded in half in the warp direction so that the resin layers overlap and mounted on a Scott type weather resistance tester, and was subjected to stagnation treatment 200 times under a 9.8 N load. The water pressure resistance of was measured.

(3) Wear resistance (water pressure resistance after wear)
Measured with reference to the description of JIS L0849. That is, a test piece having a size of 15 cm × 30 cm was prepared, and the test piece was mounted in parallel on a test piece base of a friction tester type 2 with the resin layer facing upward, and four sides were fixed with gummed tape. Then, a cotton cloth (No. 3 cotton cloth defined in JIS L-0803) was attached to a friction element having a mass of 1.96 N, and the water pressure resistance of the test piece after repeated wear for 500 times was measured.

Example 1
A plain structure woven fabric having a warp density of 115 / 2.54 cm and a weft density of 95 / 2.54 cm was woven using nylon 6 multifilament 78 dtex / 68f for both the warp and the weft. The obtained fabric was scoured and then dyed with 1.0% omf of an acid dye (“Kayanol Blue N2G” manufactured by Nippon Kayaku Co., Ltd.). Thereafter, a 5% aqueous dispersion shown in Formula 1 below was prepared and applied to the fabric by a padding method (wet pickup rate 40%), then dried and heat-treated at 170 ° C. for 40 seconds. Subsequently, the fabric was crushed and processed using a calender machine having a mirror roll under the conditions of a temperature of 170 ° C., a pressure of 300 kPa, and a speed of 30 m / min.

<Prescription 1>
Asahi Guard AG-E082 50 parts by mass (manufactured by Asahi Glass Co., Ltd., fluorinated water repellent emulsion)
Meikanate WEB 10 parts by mass (manufactured by Meisei Chemical Industry Co., Ltd., crosslinking agent, block type isocyanate)
Isopropyl alcohol 10 parts by weight Water 930 parts by weight

  Next, 5 parts by mass of Fluon L173JE (manufactured by Asahi Glass Co., Ltd., polytetrafluoroethylene fine particles) and Resamine CU4555 (manufactured by Dainichi Seika Kogyo Co., Ltd., solid content 27 mass%, wet polyurethane for forming a porous layer) Resin) 50 parts by mass and 10 parts by mass of N, N-dimethylformamide were roughly kneaded and then uniformly kneaded using a three-roll mill to obtain resin composition A.

Subsequently, a polyurethane resin solution having a composition shown in the following prescription 2 (solid content concentration 23% by mass, containing 15% by mass of polytetrafluoroethylene fine particles, viscosity 10000 mPa · s / 25 ° C.) was prepared. After defoaming, 100 g / m ² of the resin solution was applied to the crushed surface using a comma coater and immediately immersed in a 20 ° C. water bath for 2 minutes to solidify the solid content. Next, after washing with hot water at 50 ° C. for 5 minutes, it was dried at 130 ° C. for 2 minutes to form a porous layer. And it cured at 170 degreeC for 1 minute, and was set as the moisture-permeable waterproof fabric.

<Prescription 2>
Rezamin CU4555 50 parts by mass (manufactured by Dainichi Seika Kogyo Co., Ltd., solid content 27% by mass, wet polyurethane resin for forming porous layer)
Rezamin X 1 part by mass (manufactured by Dainichi Seika Kogyo Co., Ltd., crosslinking agent, isocyanate compound)
Resin Composition A 65 parts by mass N, N-dimethylformamide 25 parts by mass

(Example 2)
Fluon L173JE (manufactured by Asahi Glass Co., Ltd., polytetrafluoroethylene fine particles) 5 parts by mass and Heimlen Y237NS (manufactured by Dainichi Seika Kogyo Co., Ltd., solid content 25% by mass, dry polyurethane resin for nonporous layer formation) 50 Mass parts and 10 parts by mass of N, N-dimethylformamide were coarsely kneaded and then uniformly kneaded using a three-roll mill to obtain a resin composition B.
Subsequently, a polyurethane resin solution having a composition shown in the following prescription 3 (solid content concentration 21% by mass, containing 16% by mass of polytetrafluoroethylene fine particles, viscosity 8500 mPa · s / 25 ° C.) was prepared and defoamed. Then, the woven fabric after the crushing process used in Example 1 was prepared, 50 g / m < ² > of resin solutions were apply | coated to the crushing surface using the knife coater, and it dried at 100 degreeC for 3 minutes, and formed the nonporous layer. And it cured at 170 degreeC for 1 minute, and was set as the moisture-permeable waterproof fabric.

<Prescription 3>
Heimlen Y237NS 50 parts by mass (Daiichi Seika Kogyo Co., Ltd., solid content 25% by mass, dry polyurethane resin for nonporous layer formation)
Resin composition B 65 parts by mass Resamine X 0.5 parts by mass (manufactured by Dainichi Seika Kogyo Co., Ltd., crosslinking agent, isocyanate compound)
30 parts by mass of methyl ethyl ketone

(Example 3)
2 parts by mass of Fluon L173JE (manufactured by Asahi Glass Co., Ltd., polytetrafluoroethylene fine particles) and 50 parts by mass of Resamine CU4555 (manufactured by Dainichi Seika Kogyo Co., Ltd., solid content 27 mass, wet polyurethane resin for forming a porous layer) Parts and 8 parts by mass of N, N-dimethylformamide were roughly kneaded and then uniformly kneaded using a three-roll mill to obtain a resin composition C.

Subsequently, a polyurethane resin solution (solid content 21% by mass, containing 7% by mass of polytetrafluoroethylene fine particles, viscosity 10500 mPa · s / 25 ° C.) having the composition shown in Formula 4 below was prepared and degassed. Thereafter, a woven fabric with a crushed finish used in Example 1 was prepared, and a resin solution was applied to the crushed surface with a comma coater at an application amount of 80 g / m ² , and immediately immersed in a 20 ° C. water bath for 2 minutes to obtain a solid content. It solidified. Next, after washing with hot water at 50 ° C. for 5 minutes, it was dried at 130 ° C. for 2 minutes to form a porous layer.

<Prescription 4>
Rezamin CU4555 50 parts by mass (manufactured by Dainichi Seika Kogyo Co., Ltd., solid content 27% by mass, wet polyurethane resin for forming porous layer)
Rezamin X 1 part by mass (manufactured by Dainichi Seika Kogyo Co., Ltd., crosslinking agent, isocyanate compound)
Resin composition C 60 parts by mass N, N-dimethylformamide 30 parts by mass

  Next, 2 parts by mass of Fluon L173JE (manufactured by Asahi Glass Co., Ltd., polytetrafluoroethylene fine particles) and Heimlen Y237NS (manufactured by Dainichi Seika Kogyo Co., Ltd., solid content 25% by mass, dry polyurethane for nonporous layer formation) Resin) 50 parts by mass and 8 parts by mass of methyl ethyl ketone were roughly kneaded, and then kneaded uniformly using a three-roll mill to obtain a resin composition D.

Subsequently, a polyurethane resin solution having a composition shown in the following prescription 5 (solid content concentration 18% by mass, containing 7% by mass of polytetrafluoroethylene fine particles, viscosity 3500 mPa · s / 25 ° C.) was prepared and degassed. Then, the nonporous layer was laminated | stacked by apply | coating the resin solution 20g / m < ² > on the porous layer surface using the knife coater, and drying for 2 minutes at 100 degreeC. The entire fabric was cured at 170 ° C. for 1 minute to obtain a moisture-permeable and waterproof fabric.

<Prescription 5>
Heimlen Y237NS 50 parts by mass (Daiichi Seika Kogyo Co., Ltd., solid content 25% by mass, dry polyurethane resin for nonporous layer formation)
Resin composition D 60 parts by weight Methyl ethyl ketone 50 parts by weight

Example 4
Fluon L173JE (manufactured by Asahi Glass Co., Ltd., polytetrafluoroethylene fine particles) 18 parts by mass and Resamine CU4555 (manufactured by Dainichi Seika Kogyo Co., Ltd., solid content 27 mass%, wet polyurethane resin for forming a porous layer) 50 Part by mass and 20 parts by mass of N, N-dimethylformamide were roughly kneaded, and then kneaded uniformly using a three-roll mill to obtain a resin composition E.

Subsequently, a polyurethane resin solution having a composition shown in the following prescription 6 (solid content concentration 28% by mass, containing polytetrafluoroethylene fine particles 39% by mass, viscosity 10,000 mPa · s / 25 ° C.) was prepared and degassed. Thereafter, the crushed fabric used in Example 1 was prepared, and the resin solution was applied to the crushed surface with a comma coater at 100 g / m ² and immediately immersed in a 20 ° C. water bath for 2 minutes to solidify the solid content. . And after that, it carried out similarly to the case of Example 1, and it was set as the moisture-permeable waterproof fabric provided with the porous layer.

<Prescription 6>
Rezamin CU4555 50 parts by mass (manufactured by Dainichi Seika Kogyo Co., Ltd., solid content 27% by mass, wet polyurethane resin for forming porous layer)
Rezamin X 1 part by mass (manufactured by Dainichi Seika Kogyo Co., Ltd., crosslinking agent, isocyanate compound)
Resin composition E 88 parts by mass N, N-dimethylformamide 25 parts by mass

(Example 5)
Fluon L173JE (manufactured by Asahi Glass Co., Ltd., polytetrafluoroethylene fine particles), 5 parts by mass, Amihop LL (manufactured by Ajinomoto Co., Ltd., L-lysine derivative), 3 parts by mass, Rezamin CU4555 (Daiichi Seika Kogyo Co., Ltd.) Manufactured, solid content 27 mass%, wet polyurethane resin for forming porous layer) 50 mass parts and N, N-dimethylformamide 20 mass parts, and then kneaded uniformly using a three-roll mill. Resin composition F was obtained.

Subsequently, a polyurethane resin solution having the composition shown in the following prescription 7 (solid content concentration 23 mass%, polytetrafluoroethylene fine particles 14 mass%, L-lysine derivative 8 mass%, viscosity 10000 mPa · s / 25 ° C. ) Was prepared and degassed. Thereafter, the crushed fabric used in Example 1 was prepared, and the resin solution was applied to the crushed surface with a comma coater at 100 g / m ² and immediately immersed in a 20 ° C. water bath for 2 minutes to solidify the solid content. . And after that, it carried out similarly to the case of Example 1, and it was set as the moisture-permeable waterproof fabric provided with the porous layer.

<Prescription 7>
Rezamin CU4555 50 parts by mass
(Daiichi Seika Kogyo Co., Ltd., solid content 27% by mass, wet polyurethane resin for porous layer formation)
Rezamin X 1 part by mass (manufactured by Dainichi Seika Kogyo Co., Ltd., crosslinking agent, isocyanate compound)
Resin composition F 78 parts by mass N, N-dimethylformamide 25 parts by mass

(Comparative Example 1)
While omitting the resin composition A from the formulation 2 to obtain a polyurethane resin solution having a composition shown in the following formulation 8 (solid content concentration 21% by mass, viscosity 10500 mPa · s / 25 ° C.), except that this resin solution is used, A comparative moisture-permeable waterproof fabric was obtained by the same method as in Example 1.

<Prescription 8>
Resamine CU4555 100 parts by mass
(Daiichi Seika Kogyo Co., Ltd., solid content 27% by mass, wet polyurethane resin for porous layer formation)
Rezamin X 1 part by mass (manufactured by Dainichi Seika Kogyo Co., Ltd., crosslinking agent, isocyanate compound)
N, N-dimethylformamide 35 parts by mass

(Comparative Example 2)
While omitting the resin composition B from the formulation 3, the polyurethane resin solution having the composition shown in the following formulation 9 (solid content concentration 18% by mass, viscosity 9500 mPa · s / 25 ° C.), and using this resin solution, A comparative moisture-permeable waterproof fabric was obtained by the same method as in Example 2.

<Prescription 9>
Heimlen Y237NS 100 parts by mass (Daiichi Seika Kogyo Co., Ltd., solid content 25% by mass, dry polyurethane resin for nonporous layer formation)
Resamine X 0.5 part by mass (manufactured by Dainichi Seika Kogyo Co., Ltd., crosslinking agent, isocyanate compound)
Methyl ethyl ketone 30 parts by mass N, N-dimethylformamide 10 parts by mass

(Comparative Example 3)
By omitting the resin composition C from the formulation 4, a polyurethane resin solution having a composition shown in the following formulation 10 (solid content concentration 20% by mass, viscosity 9500 mPa · s / 25 ° C.) and omitting the resin composition D from the formulation 5 A polyurethane resin solution having a composition shown in the following prescription 11 (solid content concentration 18% by mass, viscosity 3300 mPa · s / 25 ° C.) was obtained.

<Prescription 10>
Resamine CU4555 100 parts by mass
(Daiichi Seika Kogyo Co., Ltd., solid content 27% by mass, wet polyurethane resin for porous layer formation)
Rezamin X 1 part by mass (manufactured by Dainichi Seika Kogyo Co., Ltd., crosslinking agent, isocyanate compound)
N, N-dimethylformamide 40 parts by mass

<Prescription 11>
Heimlen Y237NS 100 parts by mass (Daiichi Seika Kogyo Co., Ltd., solid content 25% by mass, dry polyurethane resin for nonporous layer formation)
Methyl ethyl ketone 58 parts by mass

  Thereafter, Example 3 and Example 3 were used except that the resin solution shown in Formula 10 was used instead of the resin solution shown in Formula 4, and the resin solution shown in Formula 11 was used instead of the resin solution shown in Formula 5. In the same manner, a moisture-permeable waterproof fabric for comparison was obtained.

  The performance of each fabric obtained in Examples 1-5 and Comparative Examples 1-3 is shown in Table 1 below.

As is apparent from Table 1, the moisture-permeable and waterproof fabric of the present invention is excellent in moisture-permeable and waterproof performance. Compared with the fabric obtained in the comparative example, not only weather resistance and abrasion resistance but also waterproof performance. Excellent washing durability.

Claims (4)

A moisture-permeable and waterproof fabric comprising a polyurethane resin layer containing 5 to 50% by mass of polytetrafluoroethylene fine particles on at least one surface of a fiber fabric. The moisture-permeable and waterproof fabric according to claim 1, wherein the resin layer is a perforated layer. The moisture-permeable and waterproof fabric according to claim 1, wherein the resin layer is a non-porous layer. The moisture-permeable and waterproof fabric according to claim 1, wherein the resin layer has a structure in which a porous layer and a non-porous layer are laminated in this order on a fiber fabric.