JPH0860558A - Production of soft moisture-permeable waterproof fabric - Google Patents

Abstract

PURPOSE: To obtain a moisture-permeable waterproof fabric having soft handle by forming a urethane resin film containing an inorganic fine particles on the surface of air-permeable sheet-like material and laminating the fabric and releasing the sheet-like material. CONSTITUTION: A synthetic polymer solution consisting essentially of a polyurethane and containing 1-40 wt.% of inorganic fine particles such as silicon dioxide having <=1μm average particle diameter and >=200ml/100g N,N- dimethylformamide absorption amount is applied to the surface of a sheet-like material having many fine pores of <=1mm long diameters and <=20cm<3> /cm<2> /sec and formed using laser perforating machine and the sheet-like material is immersed in water so as to carry out wet film formation. A fiber fabric such as nylon tricot half is laminated through an adhesive onto the sheet-like resin film face and the sheet-like material is released to provide the objective moisture-permeable water-proof fabric having >=1.0kgf/cm<2> water pressure resistance and >=5000g/cm.24hrs moisture permeability.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for producing a moisture-permeable and waterproof cloth which is used for various kinds of clothes such as rain clothes and outer garments and which is excellent in moisture permeability, waterproof performance and soft feeling.

[0002]

2. Description of the Related Art Conventionally, laminating and coating methods have been well known as methods for producing a moisture-permeable and waterproof cloth. The laminating method is a method that is obtained by joining a resin film having a moisture-permeable and waterproof property and a fiber cloth with an adhesive agent. By reducing the amount of adhesive agent and the adhesive area of this joint portion, a soft wind is obtained. We have obtained a breathable waterproof fabric.
On the other hand, the coating method includes a wet coating method and a dry coating method, and as a resin film formed by the coating method, a porous film and a non-porous resin film are known.

Generally, when the resin layer is perforated, excellent moisture permeation performance is easily obtained, but waterproof performance is apt to be insufficient. Conversely, when the resin layer is non-perforated, excellent waterproof performance is easily obtained. The moisture permeability is likely to be insufficient. For example, although the coated fabric obtained by the wet coating process of polyurethane resin is originally excellent in waterproof performance, it has insufficient moisture permeation performance. Therefore, in order to improve the moisture permeation performance, an anionic surfactant or a nonionic surfactant is used. It is common to use a surfactant, hydrophilic polymer, etc. together. However, although the moisture permeability of the coated fabric obtained by such a method is relatively good, it is not sufficient, and the waterproof performance is considerably deteriorated. As a result, both of them can satisfy sufficient performance. Not done.

Therefore, the inventors of the present invention have previously described in Japanese Unexamined Patent Publication No.
No. 222677, an inorganic fine powder having a porous resin layer made of a synthetic polymer mainly composed of a polyurethane resin on a fiber cloth, the resin layer being substantially non-porous and having an average particle diameter of 0.1 μm or less. We have proposed a moisture-permeable waterproof coated fabric with high water pressure resistance and high moisture-permeation performance, which contains 1% or more of water. According to this method, it is possible to obtain a moisture-permeable and waterproof coating fabric having both excellent moisture permeability and waterproof performance, but since the resin liquid is directly applied to the fiber fabric, it is possible to prevent the resin from penetrating into the fiber fabric. There is a problem that it cannot be applied to a low density woven or knitted fabric or a highly stretchable woven or knitted fabric in which a resin leak is likely to occur on the surface of the fabric because the texture hardening cannot be avoided.

[0005]

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and provides a moisture-permeable waterproof fabric having both excellent waterproof performance and moisture-permeable performance and having a soft texture. It is intended to be manufactured.

[0006]

SUMMARY OF THE INVENTION The present invention achieves the above object and has the following configuration. That is, according to the present invention, the average particle size is 1 μm or less and the amount of N, N-dimethylformamide adsorbed on a sheet-like material having a large diameter of 1 mm or less and a large number of fine pores with an air permeability of 20 cm ³ / cm ² / sec or less. Of 200 ml / 100 g or more of inorganic fine powder is contained in an amount of 1 to 40% by weight, and a synthetic polymer solution containing a polyurethane resin as a main component is applied, and the film is dipped in water to form a wet film, and then a fiber cloth is formed on the formed resin film surface. Is laminated with an adhesive, and then the sheet-like material is peeled off. Water pressure resistance of 1.0 kgf / cm ² or more, moisture permeability of 5000 g / m
^The gist of the invention is a method of manufacturing a moisture-permeable waterproof fabric having a soft texture of 2.24 hrs or more. Hereinafter, the method of the present invention will be described in detail.

In the method of the present invention, first, the major axis is 1 mm.
Permeability 20 cm ³ / cm ² / se with the following numerous micropores
c Prepare a sheet-like material with the following size and average particle size of 1 μm
The amount of N, N-dimethylformamide adsorbed below is 200 ml / 100 g or more of inorganic fine powder
A polyurethane polymer-based synthetic polymer solution containing 40% by weight is applied and immersed in water to form a wet film.

The sheet material used here is a film,
It may be paper, woven fabric, etc., as long as one side (coating side) of the sheet-like material has a poor adhesion after solidification of the polyurethane resin used in the present invention, a typical example is a Teflon film, Other examples include a release film or release taffeta obtained by coating a polyethylene terephthalate film or nylon taffeta with a silicone resin, and a release paper obtained by laminating a polyethylene or polypropylene film on a paper and then coating a silicone resin.

This sheet-like material has a major axis of 1 mm or less,
It is necessary to have a large number of fine pores having an air permeability (JIS L-1018, 1096 Frazier method) of 20 cm ³ / cm ² / sec or less. If the major axis is greater than 1 mm and the air permeability is greater than 20 cm ³ / cm ² / sec, it will generally be easier for the resin solution to leak to the back side of the sheet material, depending on the viscosity and viscosity of the resin solution applied to the sheet material. It is not preferable.

In the present invention, 1 to 40% by weight of inorganic fine powder having an average particle diameter of 1 μm or less and an adsorption amount of N, N-dimethylformamide of 200 ml / 100 g or more is contained on the above-mentioned sheet material. A synthetic polymer solution consisting mainly of polyurethane resin is applied to perform wet film formation.

Examples of the inorganic fine powder used here include inorganic fine powder finely pulverized by a usual wet pulverization method or a ball mill pulverization method, a gas-phase oxidation method of a metal halide, a combustion hydrolysis method, an electric arc method and the like. The metal oxide fine powder obtained by the dry method and the like can be mentioned, and among them, the silicon dioxide fine powder produced by these methods can be mentioned as a representative. The fine powder obtained by these methods generally has a particle size of 0.05 μm or less and at the same time has a very large amount of N, N-dimethylformamide adsorbed, and can be added to a synthetic polymer resin solution. It is suitable as an inorganic fine powder. Further, if the surface of the fine powder is modified to be hydrophobic, it is more preferable from the viewpoint of water leakage, and the fine powder is preferably substantially non-porous.

The amount of N, N-dimethylformamide adsorbed here means that 5 g of inorganic fine powder is placed on a glass plate,
Every time one drop of N, N-dimethylformamide was dropped, the work of kneading was repeated using a spatula made of stainless steel, and N, N-dimethyl required until just before one drop of N, N-dimethylformamide suddenly became soft. It means the volume of formamide (unit: milliliter).
This is the one in which N, N-dimethylformamide was used instead of the oil of SK-5101 boiled linseed.

The inorganic fine powder used in the present invention is required to have an average particle size of 1 μm or less, and N, N-
Adsorption amount of dimethylformamide is 200ml / 1
It is necessary to be more than 00g, and the average particle size is less than 0.1μm and 250ml / 1
A substance having an adsorption amount of N, N-dimethylformamide of 00 g or more is more preferable in terms of the effect of the present invention. If the average particle size exceeds 1 μm, the resulting water-permeable membrane has an excessively large fine pore size, which lowers the waterproof performance, which is not preferable, and if the amount of N, N-dimethylformamide adsorbed is less than 200 ml / 100 g, It is not preferable because the number of fine pores in the moisture permeable membrane is reduced and high moisture permeability cannot be obtained.

It is necessary that the inorganic fine powder used in the present invention is uniformly contained in an amount of 1 to 40% by weight, more preferably 3 to 30% by weight, based on the resin layer composed of a synthetic polymer mainly composed of polyurethane resin. It is better to contain%. If it is less than 1% by weight, the number of fine pores of the moisture permeable membrane of the obtained coated fabric is small, and high moisture permeability cannot be obtained. If it exceeds 40% by weight, the resin membrane becomes weak and cannot be practically used. The inorganic fine powder does not necessarily have to be highly pure, and may contain other inorganic substances such as pigments and fillers as impurities.

The polyurethane resin-based synthetic polymer used in the present invention means a polyurethane component of 50 to 100% by weight.
Other synthetic polymers include, for example, polyacrylic acid, polyvinyl chloride, polystyrene,
It suffices that the content of polybutadiene, polyamino acid or the like or a copolymer thereof be less than 50% by weight, and of course, a compound modified with fluorine or silicon can be used in the present invention.

The polyurethane resin is a copolymer obtained by reacting an isocyanate with a polyol, and aromatic diisocyanate, aliphatic diisocyanate and alicyclic diisocyanate are used alone or as a mixture thereof as an isocyanate component. , 4-
Diisocyanate, 4,4′-diphenylmethane diisocyanate, 1,6-hexanediisocyanate, 1,4-cyclohexanediisocyanate, etc. are used, and as the polyol component, polyether polyol or polyester polyol is used, and the polyether polyol is polyethylene glycol. , Polypropylene glycol, polytetramethylene glycol, etc. are used, and the polyester polyol uses a reaction product of a diol such as ethylene glycol, propylene glycol and a dibasic acid such as adipic acid, sebacic acid or a ring-opening polymer such as caprolactone. .

Further, the above-mentioned synthetic polymer solution mainly composed of polyurethane resin containing inorganic fine powder may be appropriately coated by a usual coating method, for example, a knife coater, a comma coater, a reverse coater or the like. In order to obtain a water pressure resistance of 1.0 kgf / cm ² or more, the dry resin film weight is generally 5 g / m ² or more, preferably 10 g / m ² although it depends on the type of sheet material.
It is advisable to adjust the coating amount so that the coating is performed.

In the present invention, an isocyanate compound having a high affinity for the resin may be used in combination for the purpose of improving the abrasion resistance and strength of the resin film. As the isocyanate compound, 2,4-tolylene diisocyanate, diphenylmethane diisocyanate, isophorone diisocyanate, hexamethylene diisocyanate or a compound containing 3 mol of these diisocyanates and active hydrogen (eg, trimethylolpropane, glycerin, etc.) 1
Triisocyanates obtained by addition reaction with moles can be used. The above isocyanates may be in a form in which the isocyanate group is free, or may be in a form in which the block is dissociated by the subsequent heat treatment, which is stabilized by adding phenol, methylethylketoxime and the like, It may be properly used depending on workability and purpose.

In the present invention, after the resin liquid composed of the above-mentioned polyurethane-based synthetic polymer is applied to the sheet-like material, it is immersed in water at 0 to 30 ° C. for 0.5 to 10 minutes to wet-solidify the resin portion. I do. Below, in warm water of 40-60 ° C
After washing for 15 minutes, it is dried by a usual method.

In the present invention, the fiber cloth is laminated on the resin film surface of the thus obtained sheet-like material with an adhesive.

The fiber cloth used in the present invention includes polyamide synthetic fibers represented by nylon 6 and nylon 66, polyester synthetic fibers represented by polyethylene terephthalate, polyacrylonitrile synthetic fibers,
Woven and knitted fabrics made of polyvinyl alcohol synthetic fibers, semi-synthetic fibers such as triacetate, or mixed fibers such as nylon 6 / cotton, polyethylene terephthalate / cotton, etc.
Nonwoven fabrics and the like can be mentioned.

The adhesive used in the present invention may be any known polyurethane-based adhesive, polyamide-based adhesive, polyester-based adhesive or the like, and may be appropriately selected and used according to the type of cloth and the application.

When laminating, the above-mentioned adhesive solution is appropriately coated on the resin film surface using a knife coater, comma coater, gravure coater, etc., and the coating amount is adjusted so that the dry film weight becomes 1 to 50 g / m ^2. And apply
After drying, it may be carried out by a generally known method of thermocompression bonding. However, in view of the moisture permeability and the feeling of the moisture-permeable and waterproof cloth obtained, in the present invention, the dry coating weight is 1 in the case of the entire coating.
10 g / m ² or less, or use a gravure coater, screen slab, etc. to make the adhesive into dots, lines or a combination of dots and lines, etc. It is preferable to adjust the coating so that it becomes 10% and apply. If the adhesion area is less than 10%, the adhesive strength between the resin film and the fiber cloth will be poor, and if it is more than 60%, the moisture permeability of the moisture-permeable waterproof cloth obtained will easily be less than 5000 g / m ² · 24 hrs, which is not preferable. .

After the above-mentioned laminating process, the moisture permeable and waterproof cloth of the present invention can be obtained by peeling the sheet-like material. However, for the purpose of further improving waterproofness, the cloth is subjected to a water repellent treatment. However, it does not matter. For the water repellent treatment, a known water repellent treatment method that is generally carried out may be adopted using a fluorine-based water repellent, a silicon water repellent, or the like.

The present invention is constituted as described above, and according to the present invention, it is possible to obtain a moisture permeable and waterproof cloth having excellent waterproof performance and moisture permeable performance and having a soft texture. You can

[0026]

The moisture-permeable and waterproof cloth according to the method of the present invention is a wet membrane containing an inorganic fine powder having an average particle size of 1 μm or less and an adsorption amount of N, N-dimethylformamide of 200 ml / 100 g or more. By laminating a fiber cloth with an adhesive, it has excellent waterproof performance, moisture permeability performance and soft texture.

The reason is that the average particle size is 1 μm or less, and N,
Although it has not been clearly clarified whether excellent moisture permeability and waterproof performance can be obtained at the same time by including an inorganic fine powder having an N-dimethylformamide adsorption amount of 200 ml / 100 g or more, the present invention is not clear. They speculate as follows.

That is, a synthetic polymer solution mainly composed of a polyurethane resin in which an inorganic fine powder having an average particle size of 1 μm or less and an adsorption amount of N, N-dimethylformamide of 200 ml / 100 g or more is uniformly dispersed is finely divided. When a sheet-like material having a large number of pores is coated and wet-coagulated, water as a coagulating liquid and N, N-dimethylformamide as a resin solvent are mixed, and the solvent is rapidly separated from the resin liquid. The resin solidifies as it goes, but at that time, the inorganic fine powder having an average particle diameter of 1 μm or less and an adsorption amount of N, N-dimethylformamide of 200 ml / 100 g or more is uniformly dispersed in the resin solution. The surface of the inorganic fine powder has a higher concentration of N, N-dimethylformamide in the resin solution than the other parts. Since the concentration of the fat-based synthetic polymer is low, water, which is the coagulating liquid, first replaces N, N-dimethylformamide on the surface of the inorganic fine powder during the wet coagulation process, and the water immediately around the inorganic fine powder. Since solidification begins at the beginning and the entire resin solidifies after that, the solidification rate becomes faster, resulting in a very porous form with countless micropores of 1 μm or less in addition to the honeycomb structure peculiar to urethane resin. I'm guessing.

In the present invention, excellent waterproofness is exhibited due to the fineness of the formed fine pores, and high moisture permeability is exhibited due to the innumerable minute pores, which is characteristic of a highly moisture-permeable waterproof fabric. However, it is also very effective for water leakage, which tends to cause problems when pressure is applied during wearing.

Furthermore, since the inorganic fine powder of the present invention is evenly present from the surface layer to the lower layer of the resin layer, the surface of the resin layer eliminates the slimy feeling peculiar to polyurethane resin and gives a dry touch, and at the same time the entire resin layer is formed. The abrasion resistance and the adhesive strength of are improved.

Further, as in the present invention, a resin film is formed on a sheet-like material having a large number of fine holes, and the sheet-like material is peeled off. Therefore, the peeled resin film surface is different from a normal film surface. It has a matte tone with different fine unevenness, and does not feel discomfort even if it comes into direct contact with a part of the body. Furthermore, the amount of adhesive applied is small or dotted, linear, or a combination of dotted and linear. Thus, when laminated, it has a high degree of freedom as a moisture-permeable and waterproof cloth, and is excellent in wearing feeling.

[0032]

EXAMPLES The method for producing the moisture-permeable and waterproof fabric of the present invention will be specifically described below with reference to examples. The performance of the fabrics in the examples was measured by the following method. (1) Water pressure resistance JIS L-1092 (high water pressure method) (2) Water vapor permeability JIS L-1099 (A-1 method) (3) Water repellency JIS L-1096 (spray method) (4) Hand KES method The flexural rigidity was measured. By handling, the texture was evaluated relatively in the following three stages. ○: Soft △: Slightly hard ×: Hard

Example 1 First, a release film Emblet SC-50 (manufactured by Unitika Ltd., a film made of polyethylene terephthalate having a thickness of 50 μm and having one side treated with silicon) was prepared, and the diameter thereof was about 0 using a laser perforator. Circular fine holes of 0.1 mm were uniformly formed on the entire surface of the film at a density of 100 / cm ² to obtain a sheet-like material having an air permeability of 15 cm ³ / cm ² / sec.

Next, a tricot half using nylon filament 40 denier / 10 filament for both the front yarn and the back yarn is prepared, and scouring and dyeing with an acid dye are carried out in a usual manner on the tricot half (manufactured by Bayer Co.,
Acid dye Telon Blue GGL 1% owf was used) to obtain a fiber base cloth for lamination.

Here, the resin solid content concentration 2 shown in the following prescription 1
A 4% polyurethane resin solution was applied to the silicon-treated surface of the above-mentioned sheet material at a coating amount of 80 g / m ² using a knife over roll coater, and then immediately immersed in water at 15 ° C. for 40 seconds for resin Solidify the minutes, then 50
It was washed in warm water at ℃ for 10 minutes and dried to form a resin film containing 9% by weight of inorganic fine powder.

Formulation 1 Laxkin 1740-29B 100 parts (Seiko Chemical Co., Ltd., ester type polyurethane resin) Resamine X 1 part (Dainichi Seika Chemicals Co., Ltd., isocyanate compound) N, N-dimethylformamide 30 parts Aerosil R -972 3 parts (manufactured by Nippon Aerosil Co., Ltd., average particle size 0.016 μm,
N, N-dimethylformamide adsorption amount 350 ml / 100 g of hydrophobic silicon dioxide fine powder)

Next, using a gravure coater (20 mesh, depth 0.6 mm) on the resin film surface described above, an adhesive solution having a solid content concentration of 30% shown in the following prescription 2 was applied to a coating area of 25%.
At a coating amount of 25 g / m ² at 80 ° C
After being dried for 2 minutes, the nylon tricot half was laminated with a hot roll at a temperature of 130 ° C., and then the sheet-like material was peeled off.

Prescription 2 RISVON NT-345 100 parts (manufactured by Dainippon Ink and Chemicals, Inc., two-component polyurethane adhesive) BURNOCK DN-950 5 parts (manufactured by Dainippon Ink and Chemicals, Inc., crosslinking agent) CRISVON Accel T 3 Department (Dai Nippon Ink Chemical Co., Ltd., crosslinking accelerator)

Thereafter, a 5% aqueous dispersion of Asahi Guard 730 (manufactured by Asahi Glass Co., Ltd.), which is a fluorine-based water repellent emulsion, is padded (squeezing ratio: 40%), dried, and then dried in a tenter at 170 ° C. for 30 seconds. The final set was performed to obtain the moisture-permeable and waterproof fabric of the present invention. For comparison with the present invention, a moisture-permeable waterproof fabric for comparison (referred to as Comparative Example 1) was prepared in the same manner as in this Example except that Aerosil R-972 was omitted from Formulation 1 in Example 1. Got

The performances of the present invention and the moisture-permeable and waterproof cloth for comparison were measured and evaluated, and the results are shown in Table 1 together.

[0041]

[Table 1]

As is clear from Table 1, the moisture-permeable and waterproof fabric of the present invention had excellent water pressure resistance and moisture permeability, and also had a soft texture.

Example 2 A plain woven fabric having a warp density of 210 denier / 34 filaments and a weft density of 300 denier / 192 filaments as a weft yarn and having a warp density of 70 yarns / inch and a weft yarn density of 50 yarns / inch was prepared. Scouring and dyeing with acid dyes in the usual way (manufactured by Mitsubishi Kasei Co.
P 1% owf was used) to obtain a fiber base fabric for lamination.

Here, the resin solid content concentration 2 shown in the following prescription 3
A 4% polyurethane resin solution was applied to the silicon-treated surface of the sheet-like material used in Example 1 at a coating amount of 100 g / m ² using a knife over roll coater, and immediately thereafter, it was placed in water at 15 ° C. for 40 seconds. Immerse to solidify the resin component, then wash in warm water at 50 ° C for 10 minutes,
After drying, a resin film containing 12% by weight of inorganic fine powder was formed.

Formulation 3 Laxkin 1740-29B 100 parts (Seiko Chemical Co., Ltd., ester type polyurethane resin) Resamine X 1 part (Dainichi Seika Chemicals Co., Ltd., isocyanate compound) N, N-dimethylformamide 30 parts Alumina AKP -G015 4 parts (Sumitomo Chemical Co., Ltd., average particle size 0.03 μm, N,
N-dimethylformamide adsorption amount 310 ml /
(100 g of hydrophobic dialuminum trioxide fine powder)

Next, except for using the above-mentioned nylon plain weave as a fiber base cloth for lamination, application of an adhesive, drying,
The moisture-permeable and water-repellent fabric of the present invention was obtained by the same method as in Example 1 in all of laminating, water repellent treatment, drying and finishing set.

For comparison with the present invention, the amount of alumina AKP-G015 of Formulation 3 used in this Example 2 was 0.2.
A moisture-permeable waterproof fabric for comparison (referred to as Comparative Example 2) containing 0.7% by weight of inorganic fine powder was obtained by the same method as in this example except that the parts were used.

Further, for comparison with the present invention, this embodiment 2
The amount of Alumina AKP-G015 of Formulation 3 in 20
A moisture-permeable waterproof fabric for comparison (referred to as Comparative Example 3) containing 41% by weight of inorganic fine powder was obtained by the same method as in this example except that the parts were used.

Further, for comparison with the present invention, the nylon plain weave used in Example 2 was padded (squeezing ratio) with a 5% aqueous dispersion of a fluorine-based water repellent emulsion Asahi Guard 710 (Asahi Glass Co., Ltd.). 40%) and after drying, 160
Heat treatment at ℃ for 1 minute, then calendering machine with mirror roll at temperature 170 ℃, pressure 30kg / cm ² , speed 30m / min. A resin film was formed on the base cloth under the same conditions as in Formulation 3 of the present example to obtain a moisture-permeable and waterproof cloth for comparison (referred to as Comparative Example 4).

The performance of the present invention and the moisture permeable and waterproof fabric for comparison were measured and evaluated, and the results are shown in Table 2 together.

[0051]

[Table 2]

As is clear from Table 2, the moisture-permeable and waterproof fabric of the present invention had excellent water pressure resistance and moisture permeability, and also had a soft texture.

Example 3 A plain fabric having a warp density of 120 yarns / inch and a weft yarn density of 90 yarns / inch was prepared by using 75 denier / 72 filaments of a cationic dye dyeable polyester multifilament for both the warp yarn and the weft yarn. Scouring and dyeing (Kayacryl Blue GSL-E manufactured by Nippon Kayaku Co., Ltd., basic dye)
D 1.5% owf).

Next, using a calendering machine having a mirror surface roll, the temperature was 185 ° C., the pressure was 30 kg / cm ² , and the speed was 25.
Perform calendering under the condition of m / min, apply SH200 (Toray Dow Corning Silicon Co., Ltd., silicone oil) to the calendered surface by spraying, and dry at room temperature to release air with a permeability of 2 cm ³ / cm ² / sec. A mold taffeta was obtained.

Here, a polyurethane resin solution having a composition shown in Formula 4 below and a resin solid content of 25% was applied to the release surface of the release taffeta described above at a coating amount of 80 g / m ² using a knife over roll coater. Immediately after coating, soak in water at 15 ° C for 40 seconds to solidify the resin component, then at 50 ° C.
Was washed in warm water for 10 minutes and dried to form a resin film containing 14% by weight of inorganic fine powder.

Formulation 4 Resamine CU-4550 100 parts (Dainichi Seika Kogyo Co., Ltd., ester type polyurethane resin) Resamine X-100 1 part (Dainichi Seika Kogyo Co., Ltd., isocyanate compound) N, N-dimethylformamide 35 Part Aerosil # 200 4 parts (manufactured by Nippon Aerosil Co., Ltd., average particle size 0.012 μm,
N, N-dimethylformamide adsorption amount 350 ml / 100 g of hydrophilic silicon dioxide fine powder)

Next, using a gravure coater (30 mesh, depth 0.6 mm) on the above resin film surface, a coating area of 40
The moisture permeable and waterproof cloth of the present invention was obtained by the same method as in Example 1 except that the application amount was 30 g / m ^{2 in the} form of dots.

The performance of the moisture-permeable and waterproof fabric of the present invention was measured and evaluated, and the results are shown in Table 3.

As a comparison with the present invention, the polyester dye 7 dyeable with a cationic dye is used for both the warp and the weft.
Warp density 100 using 5 denier / 72 filaments
An attempt was made to obtain a moisture-permeable and water-repellent fabric by the same method as in this example except that a plain weave having a book / inch and a weft density of 80 / inch was used. However, the air permeability of the release taffeta was 25 cm ³ / c.
At m ² / sec, the resin film was not peeled off smoothly, and the resin film was partially broken. As a result, a moisture-permeable and waterproof fabric could not be obtained.

[0060]

[Table 3]

As is clear from Table 3, the moisture-permeable and waterproof fabric of the present invention had excellent water pressure resistance and moisture permeability, and also had a soft texture.

[0062]

EFFECTS OF THE INVENTION According to the present invention, it is possible to obtain a moisture-permeable waterproof cloth having excellent waterproof performance and excellent moisture permeability, and having a soft texture. Moreover, regardless of the structure of the woven or knitted fabric, the single yarn denier is 200 to 30
Even if it is as thick as 0 denier, high performance can be obtained in terms of both waterproofness and moisture permeability, which is very advantageous industrially. The moisture-permeable and waterproof cloth according to the method of the present invention is a material particularly suitable for clothing such as rainwear and outdoor wear because of its excellent performance.

Claims (1)

[Claims] 1. An adsorbed amount of N, N-dimethylformamide having an average particle diameter of 1 μm or less on a sheet-like material having a large diameter of 1 mm or less and a large number of fine pores and an air permeability of 20 cm ³ / cm ² / sec or less. Of 200 ml / 100 g or more of inorganic fine powder is contained in an amount of 1 to 40% by weight, and a synthetic polymer solution containing a polyurethane resin as a main component is applied, and the film is dipped in water to form a wet film, and then a fiber cloth is formed on the formed resin film surface. Is laminated with an adhesive and then the sheet-like material is peeled off. Water pressure resistance of 1.0 kgf / cm ² or more, moisture permeability of 5000 g /
A method for manufacturing a moisture-permeable and waterproof fabric having a soft texture of m ² · 24 hrs or more.