JP2000096449A - Water vapor-permeable waterproof fabric and its production - Google Patents

Abstract

PROBLEM TO BE SOLVED: To produce a water vapor-permeable waterproof fabric using a porous layer of a polyester-based thermoplastic elastomer as environmental countermeasures in place of a water vapor-permeable waterproof fabric using polytetrafluoroethylene or a polyurethane-based elastomer. SOLUTION: This water vapor-permeable waterproof fabric is a fabric containing a porous layer comprising a polyester-based thermoplastic elastomer, having <=10 μm average hole diameter and laminated onto the surface. The water vapor-permeable waterproof fabric is obtained by emulsifying and dispersing the polyester-based thermoplastic elastomer in an aqueous emulsion, mixing a polymer incompatible with the elastomer and compatible or dispersible in the aqueous emulsion, casting the resultant mixture into a filmy layer, heat- treating the formed layer at a temperature of the melting point of the elastomer or above, then dipping the heat-treated layer in a solution incompatible with the elastomer and compatible with the polymer and extracting the polymer.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a moisture-permeable and waterproof fabric and a method for producing the same, and more particularly to a moisture-permeable and water-permeable fabric by laminating a porous layer made of a thermoplastic polyester elastomer on the fabric surface. The present invention relates to a moisture-permeable waterproof fabric excellent in water pressure and taking environmental protection measures into consideration, and a method for producing the same.

[0002]

2. Description of the Related Art Moisture-permeable and waterproof fabrics are required to have a function of discharging water vapor caused by perspiration from the body to the outside of clothes and preventing rain from entering the clothes. Conventionally, to impart these functions, a microporous urethane-based resin layer has been formed on the surface of the fabric, and the microporous layer has been used to cover the surface of the fabric. This is because microporous formation is easily possible with urethane-based resins.

[0003] That is, the method of forming microporous with a urethane resin can be easily formed by dissolving a urethane resin in an organic solvent and then coagulating the resin in a coagulation bath comprising a solvent for the resin and a non-solvent. Because. However, in the case of a fabric using a polyurethane resin, there is an environmental problem that toxic gas is generated during combustion, and it is difficult to avoid these problems at present.

On the other hand, polyester-based elastomers have excellent moldability, heat resistance and mechanical properties, have no problem in terms of environmental protection during combustion, and if a porous body made of polyester-based elastomers can be obtained, they will be used in the future. Wide application is possible instead of polyurethane elastomer.

[0005] However, the development of a porous body mainly composed of a polyester elastomer has been delayed. One of the reasons is that there is no suitable solvent for the polyester resin at a low temperature and a low pressure, and it is difficult to form a film by a solution casting method.

As a method for making a polyester film porous, for example, as described in JP-A-50-146675, a compound incompatible with a polyester resin is added and mixed to form a fine phase. After forming the separation structure, this is deformed at a temperature equal to or lower than the easy stretching temperature of the polyester-based resin by a method such as small-scale stretching or bending to generate fine cracks. There is a method of forming a porous film by growing cracks generated by deformation due to biaxial stretching in the inside into local fractures. However, this method cannot be used for a polyester-based thermoplastic elastomer having an excellent elastic recovery rate.

In addition, after a polyester-based thermoplastic elastomer is dissolved in a polar solvent and gelled,
There is a method of making the porous material by extracting the solvent.
This method has problems in processing, for example, a high temperature is required for dissolution, and it is difficult to obtain a thin film due to a large shrinkage stress during solvent extraction.

[0008]

SUMMARY OF THE INVENTION The present invention provides an environmental protection measure by using a polyester-based thermoplastic elastomer porous body instead of a polyurethane-based elastomer having environmental protection problems, instead of using a porous body. An object of the present invention is to provide a moisture-permeable waterproof fabric in which consideration is given.

[0009]

The present invention relates to a fabric having a porous layer made of a polyester-based thermoplastic elastomer laminated on a surface thereof, wherein the porous layer has an average pore diameter of 10 μm.
m and a porosity in the range of 5 to 50% in a moisture-permeable and waterproof fabric, and such a moisture-permeable and waterproof fabric is a polyester-based thermoplastic elastomer. Is emulsified and dispersed in an aqueous emulsion,
Insoluble in the polyester-based thermoplastic elastomer, and compatible with the aqueous emulsion, or cast into a film layer using an aqueous solution mixed with a dispersible polymer, the melting point of the polyester-based thermoplastic elastomer or more After the heat treatment, the polyester-based thermoplastic elastomer is incompatible, and has a porous structure composed of the polyester-based thermoplastic elastomer by extracting the polymer by immersing in a solution in which the polymer is compatible. It is obtained by forming a layer on the fabric surface.

[0010]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, the present invention will be described in detail.
The moisture-permeable waterproof fabric of the present invention is one in which a porous layer made of a polyester-based thermoplastic elastomer is laminated,
The porous layer has an average pore size of 10 μm or less, preferably has micropores of 1 μm or less, and has a porous structure having a porosity in the range of 5 to 50%. If the average pore diameter exceeds 10 μm, water droplets enter and the waterproofness deteriorates, and the porosity is 5%.
When the porosity is less than 50%, the efficiency of the vapor permeability deteriorates, and satisfactory moisture permeability cannot be obtained. Conversely, when the porosity exceeds 50%, the film strength is reduced and a practical porous layer cannot be obtained.

The porous layer is formed by emulsifying and dispersing a polyester-based thermoplastic elastomer in an aqueous emulsion, and adding a polymer that is incompatible with the polyester-based thermoplastic elastomer and is compatible or dispersible in the aqueous emulsion. After casting into a film layer using the mixed aqueous solution and heat-treating at a temperature equal to or higher than the melting point of the polyester-based thermoplastic elastomer, the polyester-based thermoplastic elastomer is incompatible, and the polymer is compatible with the solution. It is obtained by forming a layer having a porous structure made of a polyester-based thermoplastic elastomer on the fabric surface by immersing and extracting the polymer.

The polyester thermoplastic elastomer which can be used in the present invention is a polyetherester block copolymer obtained by copolymerizing a thermoplastic polyester as a hard segment and a polyalkylene glycol as a soft segment. Specifically, the following are shown.

(1) Terephthalic acid, isophthalic acid, phthalic acid, naphthalene-2,6-dicarboxylic acid, naphthalene-2,7-dicarboxylic acid, diphenyl-4,4'-dicarboxylic acid, diphenoxyethanedicarboxylic acid, 3 -Aromatic dicarboxylic acids such as sodium sulfoisophthalate,
Selected from alicyclic dicarboxylic acids such as 1,4-cyclohexanedicarboxylic acid, etc .; aliphatic dicarboxylic acids such as succinic acid, oxalic acid, adipic acid, sebacic acid, dodecanediic acid, dimer acid, and ester-forming derivatives thereof. At least one,

(2) Aliphatic diols such as 1,4-butanediol, ethylene glycol, trimethylene glycol, tetramethylene glycol, pentamethylene glycol, hexamethylene glycol, neopentyl glycol, decamethylene glycol, and 1,1-cyclohexane At least one selected from alicyclic diols such as dimethanol, 1,4-cyclohexanedimethanol, and tricyclodecanedimethanol, and ester-forming derivatives thereof; and

(3) Polyethylene glycol having an average molecular weight of about 400 to 5000, poly 1,2-propylene glycol, poly 1,3-propylene glycol, a copolymer of ethylene oxide and propylene oxide, and a copolymer of ethylene oxide and tetrahydrofuran At least one of polyalkylene glycols such as a polymer,

Copolymers prepared from are preferred. Of course, a part of this acid component (usually 3
0 mol% or less) may be substituted with another dicarboxylic acid component or oxycarboxylic acid component. Similarly, a part of the glycol (generally, 30 mol% or less based on the glycol component) may be substituted with a dioxygen other than the butylene glycol component. It may be substituted with a component.

The polyether constituting the soft segment may be a polyether substituted with a dioxy component other than butylene glycol. In addition, various stabilizers, ultraviolet absorbers, and the like may be incorporated in the polymer as needed.

In order to form a porous layer by emulsifying and dispersing such a polyester-based thermoplastic elastomer in an aqueous emulsion, the polyester-based thermoplastic elastomer is added to the aqueous emulsion containing the polyester-based thermoplastic elastomer as a main component. Cast using an aqueous solution mixed with a polymer that is incompatible with or dispersible in an aqueous emulsion (hereinafter, simply referred to as a polymer) at a temperature equal to or higher than the melting point of the polyester thermoplastic elastomer. After the heat treatment, it is obtained by immersing in a solution that is incompatible with the polyester-based thermoplastic elastomer and compatible with the polymer to extract the polymer.

The method of emulsifying and dispersing the polyester-based thermoplastic elastomer in water as described above includes an alkylene oxide adduct of a polyester-based thermoplastic elastomer with a polyhydric alcohol and an aromatic alcohol, and a polyoxyalkylene unit-containing polyoxyalkylene unit. The alkylene ether glycol or a mixture thereof is dissolved in an organic solvent, water is added to the solution, and preferably, using a stirrer such as a homogenizer having a strong shearing force, preferably at 3000 rpm.
Water is added little by little while stirring as above, and the water-in-oil type (W
(O / W) to an oil-in-water type (O / W) to obtain a milky white emulsified dispersion.

The organic solvent is removed from the obtained emulsified dispersion by a conventional distillation method and the solvent is removed to prepare an aqueous emulsified dispersion of the polyester thermoplastic elastomer. The resulting emulsified dispersion of the polyester-based thermoplastic elastomer has a small emulsion particle size, and the product is stable and uniform.

Examples of the organic solvent used herein include those using one or more of dimethylformamide, dioxane, dioxolan, toluene, chloroform, and methylene chloride. The organic solvent is used in an amount of 10 to 40% by weight, preferably 20 to 30% by weight.

The polyhydric alcohol includes 1,4-
Dihydric alcohols such as butanediol, 1,6 hexadiol, neopentyl glycol, trimethylolpropane, glycerin, pentaerythritol, castor oil,
Trihydric or higher alcohols such as sorbitan are exemplified, but those using trihydric or higher alcohols are preferable.

The reason is that, since the polyester-based thermoplastic elastomer has a high molecular weight, an emulsifier having a certain high molecular weight is required to emulsify and disperse the polyester-based thermoplastic elastomer in water. It is considered that simply increasing the number and increasing the linear high molecular weight increases only the hydrophilic group, and the emulsifying power is not improved because the balance between the hydrophobic group and the hydrophilic group is lost.

On the other hand, the alkylene oxide adducts of polyhydric alcohols, particularly trihydric or higher alcohols, have a relatively large molecular weight of the hydrophobic group and branch off the hydrophilic group. It is considered that the balance between the hydrophobic group and the hydrophilic group is not lost even when the molecular weight is increased, so that good emulsifying dispersibility can be imparted.

Also, the aromatic alcohol includes:
Phenol, monocyclic phenols such as phenol having one or more alkyl groups (phenol having one aromatic ring), phenylphenol, cumylphenol,
Examples include polycyclic phenols such as benzylphenol, bisphenol, and naphthol (phenols having two or more aromatic rings), monocyclic phenols, and reaction products of polycyclic phenols with styrene (styrenated phenols). Preferred among these are polycyclic phenols,
Particularly preferred are benzylphenol and styrenated phenol. The reason is the same as that using alcohols having 3 or more valences is preferable.

Further, examples of the alkylene oxide to be added to the polyhydric alcohol and the aromatic alcohol include oxylene ethylene (EO) having 2 to 4 carbon atoms, oxypropylene (PO), and oxybutylene (BO). . These oxyalkylenes can be used in combination of two or more, and may be in any form of random or block addition. Of these, oxyethylene (EO) is preferred, and the number of moles added may be in the range of 5 to 250 moles, and particularly preferably 30 to 2 moles.
00 range.

Examples of the polyalkylene ether glycol having an oxyalkylene unit include polyethylene glycol, polypropylene glycol, and polybutylene glycol. These oxyalkylene units may be used in combination of two or more, and may be either random or block. Among them, preferred are block type polyalkylene ether glycols of oxyethylene (EO) and oxypropylene (PO), which have a molecular weight in the range of 5,000 to 20,000.

It is preferable to use two or more kinds of such alkylene oxide adducts of polyhydric alcohols, alkylene oxide adducts of aromatic alcohols, and polyalkylene ether glycols having oxyalkylene units. Block type polyalkylene ether glycol of ethylene oxide adduct of alcohols, oxyethylene (EO) and oxypropylene (PO), block type polyalkylene of ethylene oxide adduct of polycyclic phenol, oxyethylene (EO) and oxypropylene (PO) Those using ether glycol in combination are particularly preferred.

The alkylene oxide adduct of the polyhydric alcohol and the aromatic alcohol, the polyalkylene ether glycol having an oxyalkylene unit, or a mixture thereof is preferably 5 to 50% by weight based on the polyester thermoplastic elastomer. Is used in the range of 5 to 20% by weight.

Next, the polymer which is incompatible with the polyester thermoplastic elastomer and compatible with or dispersible in the aqueous emulsion is not particularly limited.
For example, polyethylene glycol, polyacrylamide, polyvinylacetamide, and starch-based polymers can be used. In particular, polyethylene glycol is preferably used because it has good compatibility or dispersibility with an aqueous emulsion and can be easily extracted with water after heat treatment.

In order to form a porous layer, an aqueous solution in which the polymer is mixed is cast and then heat-treated. Examples of the heat treatment temperature include those performed at a temperature equal to or higher than the melting point of the polyester-based thermoplastic elastomer and lower than the deterioration temperature, more preferably, at a temperature equal to or higher than the melting point of the polyester-based thermoplastic elastomer + 20 ° C. and lower than the deterioration temperature. . As a result, heat fusion between the polyester-based thermoplastic elastomer particles is sufficiently performed.

Next, the formation of the porous layer can be performed by various methods. Examples of the method include a direct coating method and a laminating method, which may be appropriately selected depending on the application. In the case of the laminating method, after the aqueous emulsion solution was applied to the surface of release paper or the like and heat-treated, the release paper was laminated on a fabric and heat-sealed, or the polyester-based thermoplastic elastomer was dissolved in a solvent. After adhering to the fabric using the adhesive as an adhesive, the polyester-based thermoplastic elastomer is incompatible and the polymer is immersed in a solution in which the polymer is compatible, and the polymer is extracted to form a porous structure. preferable. When bonding to a fabric after forming a porous structure, the porous structure is easily broken by heat and a solvent.

Further, in order to apply the aqueous emulsion to a fabric surface or a release paper surface by direct coating,
An ordinary coating method, for example, a knife coater or the like may be used.

The fabric used in the present invention includes polyester synthetic fibers such as polyethylene terephthalate, polyamide synthetic fibers such as nylon 6 and nylon 66, semi-synthetic fibers such as polyacryl and tolyl synthetic fibers, polyvinyl synthetic fibers and triacetate. Examples thereof include fiber fabrics and fiber fabrics such as woven fabrics, knitted fabrics, and nonwoven fabrics made of mixed fibers such as polyethylene terephthalate / cotton and nylon 6 / cotton.

In the present invention, these fiber cloths which have been subjected to a water-repellent treatment may be used. This is one means for preventing the penetration of the emulsion solution into the fabric. As the water repellent in this case, a known substance such as a paraffin water repellent, a polysiloxane water repellent, a fluorine water repellent, or the like can be used. A known method such as a method may be used.

[0036]

The moisture-permeable waterproof fabric of the present invention thus obtained has a porous structure composed of a novel polyester-based thermoplastic elastomer, has excellent moisture permeability, excellent breaking strength, and excellent permeability. Moisture and waterproof performance can be obtained. In addition, since a method for obtaining a porous structure can be performed at a relatively low temperature, it can be easily processed. Furthermore, since the moisture-permeable waterproof fabric does not generate toxic gas during combustion, the problem associated with disposal can be solved from the viewpoint of environmental protection.

[0037]

EXAMPLES The present invention will be further described below with reference to examples, but the present invention is not limited by these examples. In the examples, the properties were measured by the following methods, and the polyester thermoplastic elastomer used in the examples and the aqueous emulsion solution of the polyester thermoplastic elastomer were prepared by the following methods.

(1) Intrinsic Viscosity of Polyester Elastic Material The intrinsic viscosity was measured at a temperature of 35 ° C. using a mixed solvent of an equal weight of phenol and tetrachloroethane.

(2) Melting point: Thermal suggestion analysis rule 990 (DSC) manufactured by Du Pont
The melting peak temperature was determined as the melting point at a heating rate of 20 ° C./min.

(3) Moisture permeability test The moisture permeability test was performed in accordance with JIS L-1099 method (calcium chloride method).

(4) Water pressure resistance test A water pressure resistance test was performed in accordance with JIS L-1092 method (high water pressure method).

(5) Average pore size The porous layer of the obtained moisture-permeable and waterproof fabric is cut with a razor,
A microscopic photograph of the cut surface is taken, and the diameter of 20 random holes is measured to calculate an average value.

(6) Porosity (%) The density of the porous body was measured and calculated from the weight and volume of the sample, and was calculated from the density inherent in the constituent polymer by the following equation. Porosity (%) = (1−porous material density / polymer density) ×
100

(7) Preparation of Polyester Thermoplastic Elastomer Dimethyl terephthalate (hereinafter abbreviated as DMT), isophthalate (hereinafter abbreviated as IA), tetramethylene glycol (abbreviated as TMG hereinafter) Yes) and polytetramethylene glycol (hereinafter sometimes abbreviated as PTMG) to carry out a polycondensation reaction to obtain a polyether polyester block copolymer elastomer. The ratio at that time was DMT: IA = 85: 15 in molar ratio based on the total acid components, TMG was 1.45 times in molar ratio based on the total acid components, and PTMG was the total amount of the elastomer. 55% based on weight. IA is a slurry-like material,
PTMG used had a number average molecular weight of 2,000. This thermoplastic elastomer has an intrinsic viscosity of 1.0 dl /
g, melting point: 170 ° C, elongation at break: 1420%, 300%
Elongation stress: 0.3 kg / mm ² , 300% elongation recovery rate:
73%, 50% elongation recovery rate: 81%.

(8) Preparation of Aqueous Emulsion Solution of Polyester Thermoplastic Elastomer Polyester thermoplastic elastomer obtained by the above (7): 20 parts and castor oil polyoxyethylene 1
A 50 mol adduct: 5 parts was dissolved in 80 parts of methylene chloride and 20 parts of dioxane, and 75 parts of water was added little by little while stirring with a homogenizer to obtain a water-in-oil type (W).
/ O) to an oil-in-water type (O / W) to obtain a milky white emulsified dispersion. Further, methylene chloride and dioxane as solvents were removed from this emulsified dispersion by distillation under reduced pressure to prepare an emulsified dispersion having a solid content of 25%.

Example 1 A polyethylene glycol (Matsumoto Yushi, Mw = 1.2 million) was added to the emulsified dispersion of the polyester thermoplastic elastomer obtained by the above (8).
Was mixed at a solid component ratio of 92.5: 7.5, and the mixture was stirred for 12 hours to prepare an emulsion solution and then subjected to a water-repellent polyester fabric (basis weight: 120).
g / m ² ) with a knife coater to directly coat the emulsion solution to 100 g / m ² (solid content: 25 g / m ² ), heat-treat at 190 ° C. for 5 minutes, and then reach room temperature. After slowly cooling, add 1
Soak for 0 minutes to extract polyethylene glycol, 50
Drying was carried out at a temperature of ° C. The layer of the polyester-based thermoplastic elastomer formed on the surface of the obtained fabric had a porous structure having an average pore diameter of 1 μm and a porosity of 15%. Table 1 shows the evaluation results of the cloth.

Example 2 The procedure of Example 1 was repeated, except that the temperature of the heat treatment after the direct coating was 170 ° C. and the time was 5 minutes. The polyester-based thermoplastic elastomer layer formed on the surface of the obtained fabric has an average pore size of 5 μm and a porosity of 15 μm.
% Porous structure. Table 1 shows the evaluation results of the cloth.
Are shown together.

[Comparative Examples 1 and 2] A polyethylene glycol (Matsumoto Yushi, Mw = 120) was added to the emulsified dispersion of the polyester-based thermoplastic elastomer obtained by the above (8).
) Were mixed to give a solid component ratio of 98: 2 (Comparative Example 1) and a mixture of the solid component ratio was made to be 80:20 (Comparative Example 2). After stirring for 12 hours to prepare the emulsion solution, it was directly coated on a water-repellent polyester fabric (basis weight: 120 g / m ² ) by the same operation as in Example 1, and thereafter, the same as in Example 1 The processing was performed by the operation described above. In Comparative Example 1, the layer of the polyester-based thermoplastic elastomer formed on the surface of the obtained fabric had an average pore diameter of 1 μm.
The porosity is 3%, and in Comparative Example 2, the average pore size is
The porous structure was 1 μm and the porosity was 55%.
In the fabric obtained in Comparative Example 2, a part of the surface was broken when polyethylene glycol was extracted.
Table 1 also shows the evaluation results of the obtained fabrics.

[Comparative Examples 3 and 4] A polyethylene glycol (Matsumoto Yushi, Mw = 120) was added to the emulsified dispersion of the polyester-based thermoplastic elastomer obtained in the above (8).
(Comparative Example 3) and a mixture (Comparative Example 4) of which the solid component ratio is 80:20 with a solid component ratio of 98: 2. After stirring for 12 hours to prepare an emulsion solution, it was directly coated on a water-repellent polyester fabric (basis weight: 120 g / m ² ) by the same operation as in Example 2, and thereafter, the same as in Example 2 The processing was performed by the operation described above. In Comparative Example 3, the layer of the polyester-based thermoplastic elastomer formed on the surface of the obtained fabric had an average pore diameter of 5 μm.
And the porosity is 3%, and in Comparative Example 4, the average pore size is
The porous structure was 5 μm and the porosity was 55%.
In addition, in the fabric obtained in Comparative Example 4, a part of the surface was broken when polyethylene glycol was extracted.
Table 1 also shows the evaluation results of the obtained fabrics.

[Comparative Examples 5 to 7] Polyethylene glycol (Matsumoto Yushi, Mw = 120) was added to the emulsified dispersion of the polyester thermoplastic elastomer obtained by the above (8).
) Were mixed so as to have a solid component ratio of 92.5: 7.5 (Comparative Example 5), those mixed so that the solid component ratio was 98: 2 (Comparative Example 6), and And a mixture in which the solid component ratio is 80:20 (Comparative Example 7).
The mixture was stirred for 12 hours to prepare an emulsion solution, and then subjected to a water-repellent polyester fabric (basis weight:
120 g / m ² ) and 100 g / m
m ² (solid content: 25 g / m ² ), heat-treated at a temperature of 170 ° C. for 1 minute, gradually cooled to room temperature, and immersed in warm water of 50 ° C. for 10 minutes to obtain polyethylene. The glycol was extracted and dried at a temperature of 50 ° C. The layer of the polyester-based thermoplastic elastomer formed on the surface of the obtained fabric had an average pore diameter of 20 μm and a porosity of 15% in Comparative Example 5, and an average pore diameter of 20 μm in Comparative Example 6. Comparative Example 7 having a porosity of 3%
Has a porous structure with an average pore diameter of 20 μm and a porosity of 55%. In the cloth obtained in Comparative Example 7, a part of the surface was broken when polyethylene glycol was extracted. Table 1 also shows the evaluation results of the obtained fabrics.

Example 3 A polyethylene glycol (Matsumoto Yushi, Mw = 1.2 million) was added to the emulsified dispersion of the polyester thermoplastic elastomer obtained in the above (8).
Was mixed at a solid component ratio of 92.5: 7.5, and the mixture was stirred for 12 hours to prepare an emulsion solution. Then, the emulsion solution was coated on a release paper with a knife coater at 100 g / m ² ( Solid content: 25 g / m ² ), heat-treated at 190 ° C. for 5 minutes, and then water-repellent using the release paper (basis weight: 120 g / m ² ) After laminating on top and bonding at a temperature of 170 ° C. with a heating / pressing calender roller of 20 kg / cm, it was immersed in 50 ° C. hot water for 10 minutes to extract polyethylene glycol and dried at a temperature of 50 ° C. . The layer of the polyester-based thermoplastic elastomer formed on the surface of the obtained fabric has an average pore diameter of 0.5 μm
And a porous structure having a porosity of 15%. Table 1 also shows the evaluation results of the obtained fabrics.

[0052]

[Table 1]

 ────────────────────────────────────────────────── ─── Continued on the front page (72) Inventor Torukei Matsui 3-4-1 Amihara, Ibaraki-shi, Osaka Teijin Limited Osaka Research Center F-term (reference) 4L033 AB04 AC03 AC07 CA46 CA48 CA70

Claims (8)

[Claims] 1. A cloth in which a porous layer made of a polyester thermoplastic elastomer is laminated on the surface, wherein the porous layer has an average pore size of 10 μm or less and a porosity of 5 to 50%. 1. A moisture-permeable and waterproof fabric characterized by having a porous structure according to (1). 2. The moisture-permeable and waterproof property according to claim 1, wherein the hard segment of the polyester-based thermoplastic elastomer is terephthalic acid, isophthalic acid, an ester-forming derivative thereof, or 2,6-naphthalenedicarboxylic acid. Fabric. 3. The moisture-permeable and waterproof fabric according to claim 1, wherein the soft segment of the polyester-based thermoplastic elastomer is a polyether. 4. A polyester thermoplastic elastomer is emulsified and dispersed in an aqueous emulsion, and an aqueous solution obtained by mixing a polymer incompatible with the polyester thermoplastic elastomer and compatible with or dispersible in the aqueous emulsion. Cast into a film layer using, and after heat treatment at a melting point of the polyester-based thermoplastic elastomer or higher, the polyester-based thermoplastic elastomer is incompatible, and,
Production of a moisture-permeable and waterproof fabric, characterized in that a layer having a porous structure made of a polyester-based thermoplastic elastomer is formed on a fabric surface by immersing the polymer in a solution in which the polymer is compatible and extracting the polymer. Method. 5. The moisture-permeable and waterproof property according to claim 4, wherein the hard segment of the polyester-based thermoplastic elastomer is terephthalic acid, isophthalic acid, an ester-forming derivative thereof, or 2,6-naphthalenedicarboxylic acid. Fabric manufacturing method. 6. The method according to claim 4, wherein the soft segment of the polyester-based thermoplastic elastomer is a polyether. 7. The production of a moisture-permeable and waterproof fabric according to claim 4, wherein the heat treatment temperature is equal to or higher than the melting point of the polyester-based thermoplastic elastomer and lower than the deterioration temperature. Method. 8. The method for producing a moisture-permeable and waterproof fabric according to any one of claims 4 to 7, wherein the polymer is polyethylene glycol.