JP2845517B2 - Breathable waterproof fabric - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a moisture-permeable waterproof fabric having excellent properties of water absorption, water diffusion, and water release.

[Problems to be solved by conventional technology and invention]

In sportswear worn for skiing, jogging, golfing, etc., rainwater does not penetrate to the human body through the wear, while sweat and sweat vapor radiated from the human body are quickly radiated to the outside through the wear. Preferably. Also, in the case of bedding such as underwear and suits, it is desirable to quickly absorb and release sweat.

Product waterproofing is a property that is inconsistent with the desired water absorption and moisture permeability of the product. Therefore, as an attempt to satisfy these contradictory properties, a fabric in which a large number of microporous urethane resin layers are arranged, and a fabric having a moisture-permeable but nonporous urethane resin layer are known. However, the moisture permeability and water absorption of the urethane resin layer are poor, and when the amount of sweat caused by exercise exceeds the moisture permeability of the resin layer of the wear,
When the outside air temperature is low or when the outside air humidity is high, water droplets of sweat that can be seen with the naked eye adhere to the inside of the wear. Therefore, it not only wets the underwear and the skin and gives discomfort but also causes a cold.

Cellulose fibers such as cotton and rayon have been used for underwear and bedding for a long time because of their excellent water absorption. However, although cellulosic fibers are excellent in water absorption, the release rate of absorbed water is small. Therefore, when sweating, the fibers swell due to sweat absorption,
It is not comfortable to release sweat. On the other hand, synthetic fibers have poor water absorption, and attempts have been made to impart water absorption by imparting a hydrophilic substance such as polyethylene glycol or methoxymethylated nylon to the fiber surface. However, the water absorption of this fiber was insufficient. If a large amount of the hydrophilic substance is used, the feeling of the fabric is significantly deteriorated. There was a drawback that the hydrophilic substance gradually dropped off from the fabric due to repeated washing.

The present invention is more water-absorbing than conventional fabrics, diffusibility of moisture,
An object of the present invention is to provide a moisture-permeable waterproof fabric having excellent properties of releasing moisture.

[Means for solving the problem]

An object of the present invention comprises a base fabric made of waterproof synthetic resin layer having a 3000 g / m ² / 24hours or more moisture permeability of at least two layers which are sequentially applied to the surface of the base fabric, and the synthetic resin layer This is achieved by a moisture-permeable waterproof fabric in which a chitin-based substance is dispersed and contained in at least one layer.

The moisture-permeable waterproof fabric of the present invention can be produced by coating a base fabric with a liquid containing a chitin-based substance and a synthetic resin, and heating and drying the coated base fabric.

The "chitin-based substance" used in the present application includes chitin and a deacetylated compound of chitin, that is, chitosan, carboxyl-modified chitin, and the like.

Chitin is widely and abundantly present in nature, and is included as a complex with proteins, particularly in invertebrates and fungi. Among invertebrates, it is contained in large amounts in crustaceans such as shrimp and crab, and insects such as beetles and crickets. It is also contained abundantly in cell walls of fungi. Methods for producing chitin from these raw materials are described, for example, in Jour
nal of Biological sciences Research, Vol 7.P168 (19
54), Journal of Organic Chemistry, Vol 27, P1161 (19
62), and Fishery Technology, Vol 11, P50 (1974)
Etc.

Chitin has a similar chemical structure to cellulose, but unlike cellulose, it has excellent crystallinity and therefore has strong resistance to chemical reactivity, and has very different properties from cellulose, such as poor dissolution and swelling properties. And its utilization is lower than that of cellulose and other polysaccharides. Thus, chitin is currently only used as a flocculant in sludge treatment in the form of chitosan, which is largely a chitin derivative.

However, the chitin-based substance referred to in the present application has other excellent properties as compared with other compounds. That is, chitin-based substances are excellent in biocompatibility, and therefore, are expected to be used as sutures or artificial skins during surgery.

In addition, the chitin-based substance is excellent in antibacterial properties against Escherichia coli, Trichophyton, Staphylococcus and the like, and thus can impart antibacterial properties to fabrics. In addition, since it has excellent biocompatibility, it does not cause skin disorders.

The present inventors have found that when a chitin-based material is attached to a fabric together with a synthetic resin, the water-absorbing property and water-releasing property of the fabric are significantly improved due to excellent properties such as water absorption having the chitin-based material.

As the base fabric used for the fabric of the present invention, a woven fabric, a knitted fabric, a nonwoven fabric, or the like can be used. Examples of the fibers constituting the base fabric include natural fibers such as cotton and hemp, chemical fibers such as viscose rayon, cupra ammonium rayon, and acetate, and synthetic fibers such as polyamide, polyester, and polyacrylonitrile. These are used as staples and filaments.

Chitin-based substances are used to prevent the fibers from falling off.
Used with synthetic resins. The tin-based material is used after being uniformly dispersed in the synthetic resin. Therefore, even when the synthetic resin itself has no water absorption, the moisture in contact with the chitin-based substance is quickly absorbed and diffused into the synthetic resin, and the moisture absorbed in the synthetic resin is quickly released into the atmosphere. Released. If the synthetic resin has good moisture permeability, this absorption and release is further accelerated.

Although chitin can be used as it is as the chitin-based substance of the present invention, it can also be used as a derivative thereof. As the chitin derivative, chitin (chitosan) having a degree of deacetylation of 50% or more and carboxyl-modified chitin are preferable.

A polyurethane resin, a polyacryl resin, a polyvinyl chloride resin, a modified acid amide resin, a polyacrylate resin, a polyvinyl alcohol resin, or the like can be used as the synthetic resin applied to the base fabric in the present invention.

When the liquid containing the chitin-based material and synthetic resin is coated on the surface of the base fabric, preferably using a synthetic resin having a moisture permeability of more than 3,000g / m ² / 24hour. As a method for imparting moisture permeability to the synthetic resin, two methods, a mechanical method and a chemical method, can be used. As the mechanical method, two methods, a dry method and a wet method, can be further used.

As a dry method, a liquid containing a chitin-based substance, a synthetic resin, and an organic solvent is prepared, and this liquid is appropriately coated on a base fabric according to the type of the intended cloth, and the organic solvent is evaporated to form a plurality of liquids in the cloth. In order to form the fine communication holes, a method of drying the coating cloth can be used. As a wet method, a liquid containing a chitin-based substance, a synthetic resin, and a solvent is prepared, and this liquid is appropriately coated on a base cloth according to a type of a target cloth, and a plurality of fine communication holes are formed in the cloth. In order to form, a method of immersing the coating cloth in a liquid that can elute the solvent in the synthetic resin and solidify the synthetic resin can be used.

Examples of the chemical method for imparting moisture permeability to the synthetic resin include a method of mixing a hydrophilic resin such as polyethylene glycol or an amino acid resin with the synthetic resin, and a method of using a copolymer of the hydrophilic resin and the hydrophobic resin. .

It comprises a base cloth and at least two synthetic resin layers sequentially applied to the surface of the base cloth, and at least one of the at least two synthetic resin layers contains a chitin-based substance. In fabrics, the proportion of the chitin-based material in the amount comprising the chitin-based material and the synthetic resin is preferably at least 0.5% by weight, more preferably 1% by weight, while the ratio of the synthetic resin to the base fabric is 10%. It is preferred that it is between 15% and 80% by weight, more preferably between 15% and 70% by weight. In order to increase the adhesive force between the synthetic resin layer and the base cloth or between the synthetic resin layers, it is preferable to use a cross-linking agent and a synthetic resin having reactivity with the cross-linking agent. As the synthetic resin having reactivity with the crosslinking agent, a polyurethane resin, a polyacrylate resin, a modified acid amide resin, and a polyvinyl alcohol resin are preferable.

Examples of the crosslinking agent include epichlorohydrin, ethylene glycol diglycidyl ether, polyethylene glycol glycidyl ether, trimethylolpropane triglycidyl ether, glycerin diglycidyl ether, 1,
6 epoxy compound of hexanediol diether, 2,4
Isocyanate compounds such as tolylene diisocyanate, hexamethylene diisocyanate, methylene bisphenyl isocyanate, methylene bis 4 cyclohexyl isocyanate, isophorone diisocyanate, trimethylol lopan-hexamethylene diisocyanate,
Ethylene glycol, trimethylol propane, glycerin, polyol compounds such as polyoxyethylene glycol, N, bisacrylamide compounds such as methylenebisacrylamide, di- or triacrylic acid obtained by reacting polyepoxide with acrylic acid or methacrylic acid or Examples include methacrylate compounds.

The crosslinking agent is used usually in an amount of 0.3 to 10% by weight, preferably 0.5 to 5% by weight, based on the synthetic resin.

In a fabric made by coating a base cloth with a liquid containing a chitin-based material and a synthetic resin, the fabric is covered with a synthetic resin layer, so that the fabric has excellent waterproof properties, and the chitin-based material is made of a synthetic resin. The resulting fabric has excellent water absorption, water diffusion and water release. If a synthetic resin having good moisture permeability is used, the above characteristics are enhanced.

For example, can be obtained by providing a large number of through-holes in the layer, the layer made of a synthetic resin having the above moisture permeability 3,000g / m ² / 24hours, the upper layer comprising a chitin-based material and synthetic resin May be used after coating. The layer containing the chitin-based material and the synthetic resin may be one layer or two or more layers.

The thickness of the synthetic resin layer may be set arbitrarily. When a plurality of synthetic resin layers are provided, the thickness of one layer is set to 2 to 30 μ, more preferably 5 to 15 μ.

In order to further improve the water repellency, it is preferable to add a water repellent such as a fluorine-based water repellent to the fabric.

 Hereinafter, the method for producing the fabric of the present invention will be described.

First, a chitin-based substance is dissolved in an aqueous solution of a dilute acid. Examples of the acid include acetic acid, lactic acid, formic acid, succinic acid, and gluconic acid, and formic acid is preferred. The acid concentration is preferably 1 to 10% by weight. The concentration of the chitin-based substance in the aqueous acid solution is determined in consideration of solubility, viscosity, etc.
Is more preferred.

When producing a fabric obtained by coating a base cloth with a liquid containing a chitin-based substance and a synthetic resin and heating and drying the coated base cloth, for example, the liquid of the chitin-based substance is first dissolved in an organic solvent. The mixed resin is mixed with an emulsifier to form an emulsion. Further, pigments, metal powders such as aluminum, carbon, ceramics and the like may be added.

As a method of coating the mixture on the surface of the fabric, for example, there are a method of directly coating the mixed solution with a knife coater, a method of coating the mixed solution to a predetermined thickness with a bar coater, and a method of coating with a reverse coater or a gravure coater.

After coating, dry. The drying temperature is preferably from 50 to 100 ° C. In order to increase the adhesiveness between resin and fabric and resin,
After drying, it is preferable to further heat at 100 to 130 ° C.

As described above, a mechanical method or a chemical method may be used to impart moisture permeability to the synthetic resin itself.

It is preferable to apply a water repellent to the base fabric before coating the base fabric with the mixed solution. Further, first, a synthetic resin having moisture permeability and containing a water repellent may be coated on the base fabric, and a synthetic resin containing a chitin-based substance may be coated on the obtained coating layer. Conversely, a synthetic resin containing a chitin-based substance may be first coated on the base fabric, and the resultant coating layer may be coated with a synthetic resin having moisture permeability and containing a water repellent.

The moisture-permeable waterproof fabric thus obtained according to the present invention can exhibit the intended performance of the present invention without further treatment. However, it is preferable to carry out a fixing treatment in order to increase the bonding strength between the chitin-based substance and the base cloth.
The fixing agent is selected and used according to the material of the fiber corresponding to the fabric.For example, for natural materials other than wool such as cotton, hemp, and rayon, polyamine type, polyvinylamine, polyacrylonitrile-based polymer, There are polycation types such as quaternized polyethyleneimine, etc. For wool materials, there are metal-containing synthetic tannin derivatives, etc. For nylon materials, tannic acid, phenolsulfonic acid formalin condensate, etc. Is mentioned.

FIGS. 1 to 4 consist of a base cloth according to the invention and at least two synthetic resin layers successively applied to the surface of the base cloth,
FIG. 6 is a cross-sectional view showing various examples of a cloth in which at least one of the at least two synthetic resin layers contains a chitin-based substance.

In FIG. 1, 1 is a base cloth, 2 is a portion containing a water repellent and an isocyanate compound, 3 is a synthetic resin layer having moisture permeability,
Reference numeral 4 denotes a layer containing a chitin-based substance and a synthetic resin, and shows an example in which the number of resin layers is two. FIG. 2 shows an example of a fabric having three resin layers and an intermediate layer containing a chitin-based substance, and FIG. 3 shows a three-layer resin layer containing an chitin-based substance in an outer layer. FIG. 4 shows a fabric having three resin layers and an intermediate layer and an outer layer containing a chitin-based material. A plurality of minimum lines 6 in the figure indicate chitin-based substances. The number of layers of the synthetic resin may be two or more, for example, five layers. In FIG. 1, the base fabric 1 is shown as a woven fabric comprising a warp 1a and a weft 1b. May be used.

When the fabric shown in FIGS. 1 to 4 is used with the base fabric on the outside, penetration of rainwater or the like is prevented by the synthetic resin layer, and the layer 4 or the layer 4 and / or the layer 5 Due to the excellent water absorption of the chitin-based substance arranged in the water vapor, the sweat vapor is quickly absorbed and released through the moisture-permeable layer 3. Therefore, for example, dew condensation does not occur inside a cloth such as sportswear.

If the amount of generated sweat is large compared to the moisture permeability of the layer 3,
Alternatively, if the release of sweat vapor is not sufficient in an atmosphere of high humidity, the sweat vapor is absorbed and diffused into the large-capacity layer containing the chitin-based substance, and then the sweat vapor is sequentially removed from the fabric. Will be released. Therefore, also in this case, the occurrence of dew condensation in the sportswear can be prevented.

〔Example〕

 Hereinafter, the present invention will be described in detail with reference to various examples of the present invention.

Reference Examples 1 and 2 Cotton twill fabric (basis weight 120 g / m ² , 40 count, weft density 190 yarns / i
n) was subjected to primary treatment in the following manner. Chitosan having a degree of deacetylation of 80% or more (manufactured by Dainichi Seika Kogyo Co., Ltd .: dichitosan) is added to the acetic acid aqueous solution so as to have a concentration of 0.5%, and completely dissolved with a disper. A treatment liquid is prepared by adding the following compounding agent to this chitosan aqueous solution.

Each of the chemicals in the blended liquid is a modified acid amide resin (manufactured by Miki Riken: Riken Resin RJ-36), a reactive special silicon derivative (manufactured by Ohara Palladium: Parasolve 272), and an organic amine catalyst (manufactured by Ohara Palladium) : Paracat P) and an epoxy silicone compound (Dick Silicon Softener 200 manufactured by Dainippon Ink and Chemicals, Inc.).

After immersing a base cloth made of a cotton material in the above-mentioned mixed solution at room temperature for 3 seconds and squeezing with a mangle so that the squeezing rate becomes 100%, 120
Heat treatment at 60 ° C for 60 seconds. A secondary treatment is performed to firmly fix the chitosan inside and outside of the primary treated base cloth. That is, the base cloth to be subjected to the secondary treatment is immersed in a 1% aqueous solution of dimethylammonium chloride (manufactured by Nisshinbo Industries: Danfix 125) at room temperature for 3 seconds as in the primary treatment. In order to confirm the characteristics of the fabric thus obtained, an antibacterial test (microbial count method) and a water absorption rate test (JIS
L-1096 A method).

The number of bacteria was measured by the following manual for evaluating the effect of processing on antibacterial and deodorant processed products and the method for measuring the number of bacteria (Textile Sanitary Processing Council, 1988).

The following bacteria are suspended in a sterilized liquid broth, and 0.2 ml of this solution is inoculated on a 0.2 g test piece (the number of bacteria is about 280,000).
After culturing at a temperature of 37 ° C. for 18 hours, take out. The number of viable bacteria on the test piece before and after the culture is measured, and the increase / decrease value of the number of bacteria and the difference between the increase / decrease values are calculated by the following formula.

Test bacteria: Staphylococcus aur
eus ATCC 6538P (IFO 12732) Test piece mass: 0.2g Culture temperature / time: 37 ℃ × 18h Washing method: JIS L 0217,103 Bacterial count increase / decrease difference = Bacterial count increase / decrease value of unprocessed sample−Bacterial count increase / decrease value of processed sample ** Cotton standard white cloth was used as the unprocessed sample.

Reference Examples 3 and 4, Comparative Examples 1 and 2 Processed yarn woven fabric of nylon (100 g / m ² 70d, basis density
For 200 dyes / in), the following formulation was prepared using a 0.5% aqueous solution of chitosan prepared in the same manner as in Reference Examples 1 and 2, and treated in a bath at 60 ° C. for 10 minutes in a jet dyeing machine. And then squeezed by a centrifugal dehydrator to a squeezing ratio of 120%.
Heat treatment was performed at 90 ° C. for 90 seconds.

Secondary processing is performed on the inside and outside of the primary-treated fabric to firmly fix chitosan. That is, the base fabric that has been subjected to the primary treatment in a 0.5% aqueous solution of an aromatic sulfonic acid compound (manufactured by Nichika Chemical Co., Ltd .: Sun Life TN) is immersed for 3 seconds at room temperature.
The same performance tests as those in Reference Examples 1 and 2 were performed on the fabrics obtained in Reference Examples 3 and 4, and Comparative Examples 1 and 2. The results are shown in Table 1.

Examples 1 and 2, Comparative Example 1 A dyed cloth made of nylon fabric (70d, longitude, total of 210 lines / in) was coated with a fluorine-based water repellent (Sumitomo 3M Co., Ltd .;
It was immersed in a mixture of an isocyanate compound (taken by Takeda Pharmaceutical Co., Ltd .: Takenate B830W, 10% with respect to the fluorine-based water repellent) as an adhesive. Thereafter, a heat treatment is performed at 160 ° C. for 60 seconds, and a heat calender is applied at 150 ° C. and a linear pressure of 10 tons (2000 mm in width) to impart smoothness to one side of the fabric. A water-repellent cloth of 15 cc / cm ² · second was obtained (formation of the first layer). On the other hand, W / O type polyurethane resin emulsion (manufactured by Sanyo Chemical Industries, Ltd .: Samprene UE-1000)
N) 100 parts, toluene 40 parts, methyl ethyl ketone 20 parts, water
A liquid mixture of 10 parts, 20 parts of a fluorine-based water repellent (described above) and 5 parts of an isocyanate compound (manufactured by Dainippon Ink and Chemicals, Inc .: Vernock DN950) was prepared. Apply using knife coating method so that the adhesion weight in the wet state is 30 g / m ² and 6.0 g / m ² in the dry state
To form a porous moisture-permeable waterproof layer (second layer) having an adhesion weight of. Next, a 10% dilute acid solution having a mixing ratio of acetic acid and lactic acid of 1: 1 was prepared, and chitin (Chitosan A, manufactured by Katakura Tikkalin Co., Ltd.) having a degree of deacetylation of 80% was added to the solution in a 0.5% amount. 55 parts of a chitin dilute acid solution which was swelled for a time and then stirred and dissolved with a disper, and a W / O type polyurethane resin emulsion (Dainichi Seika Kogyo Co., Ltd .: Heimulen X-3038) was added.
A mixed solution consisting of 100 parts, 20 parts of methyl ethyl ketone, 20 parts of toluene and 1.5 parts of an isocyanate compound (described above) was prepared, and this solution was allowed to have a clearance of 100 μm on the second layer.
Absorbent polyurethane coating dried by heating to about 70 ° C. 2 minutes in an oven so as to 100 g / m ² in the wet state, the porous attachment weight of 15 g / m ² in a dry state using a bar coater set at / A chitosan film layer (third layer) was formed. In order to further improve the wear resistance and the decorative effect, a W / O type urethane resin emulsion (manufactured by Sanyo Chemical Industries, Ltd .: Samprene)
UE 1000N) 100 parts, methyl ethyl ketone 20 parts, toluene 2
A mixture of 0 parts, 40 parts of the 0.5% chitosan dilute acid solution, 3 parts of the isocyanate compound (described above), and a small amount of an organic pigment was prepared, and the mixture was wetted on the third layer by knife coating. in coated so as to be 8.0 g / m ² at 40 g / m ² dry, 80 ° C. in an oven, dried innermost layer 2 minutes (4
Figure). Next, in order to make the adhesiveness between the resin layers and between the resin layers and the fabric even harder, finishing was performed by heating at 120 ° C. for 2 minutes.

The amount of chitin for the fabric in the present invention was 1.04 in Example 1.
%, The amount of the aqueous solution of deacetylated chitin was changed so as to be 2.08% for the fabric of Example 2, and 0.3% for Comparative Example 1.

In order to confirm the characteristics of the obtained porous moisture-absorbing and moisture-permeable waterproof cloth, water resistance (water pressure mm based on JIS L 1092), water repellency (% based on JIS L 1092), moisture permeability (JIS L 1099 based Nuisance ^{g / m 2 / 24hrs.)} , abrasion resistance (grade), dew condensation (water droplets observed), was examined hygroscopicity (%) and absorption rate (JIS L 1096A). Table 2 shows the results of the above measurements.

Here, in the abrasion resistance test, the state of the resin surface of the test sample when the test sample cotton was reciprocated 500 times by applying a load of 200 g to the test sample cotton was evaluated on a 5-point scale. That is, no abnormality is observed. … Class 5 Some scratch marks are observed. … Class 4 Considerable scratch marks are observed. ... Grade 3 Some peeling is observed. … Class 2 Considerable peeling is observed. ... First grade.

In addition, the test of the dew condensation condition was performed at an outside air temperature of 20 ± 1 ° C and a humidity of 80.
(%) 40 ± in a climate chamber with RH airflow conditions
Cover the work cloth at about 2 cm above the hot water surface of a water bath that can control the temperature of 1 ° C so that the coating surface of the work cloth is on the hot water surface side and leave it for 20 minutes. In this case, the container is sealed with a container wall so that no outside air flows between the work cloth and the hot water. After standing for 20 minutes, the state of water droplets (condensation) on the surface of the coating layer was observed and classified as follows.

Water droplets adhere to the entire surface. (Many) Water droplets adhere to the surface approximately 30%. (Medium) Water droplets are slightly attached like dots. (Small) Water droplets are hardly observed. (None) Further, at this time, water drops on the processed surface were lightly wiped with a filter paper, and the moisture remaining in the processed cloth was compared with the weight increase rate (%) as hygroscopicity. The results are shown in Table 2.

Examples 3 and 4, Comparative Example 2 Ester tricot (40 denier, 50 wells / inc
h, course 55 / inch) was treated with the same water-repellent agent as in Example 1, dried at 140 ° C. for 2 minutes, and heat-treated to obtain a fabric (first layer formation). Next, a moisture-permeable waterproof layer (second layer) was formed in the same manner as in Example 1, and a 20% toluene solution of an acrylic resin (manufactured by Toa Paint Co., Ltd .: Toaclon XE-2511 = 80 parts, 25% of a moisture-permeable one-liquid urethane) was formed thereon. Toluene / isopropyl alcohol solution (Dainichi Seika Kogyo Co., Ltd .:
Haimuren NPU-5) 20 parts, 20 parts of toluene, the isocyanate compound (supra), 3 parts of carboxymethyl chitin (Katakura Chikkarin Co., Ltd. in the wet state a mixed preparation of a 0.5% aqueous solution 20 parts of CM chitin) 100 g / m ² And dried in an oven at 70 ° C. for 2 minutes to form a moisture-permeable porous し -chitin film layer having a water absorption of 18 g / m ² in a dry state (the third layer). Formation). Thereafter, the fabric was further set at 120 ° C. for 2 minutes in order to further enhance the adhesion to the resin.

In Example 3, the amount of chitin relative to the fabric in the present invention was 0.5
%, 1.0% for the fabric of Example 4, and 0.3% for the fabric of Comparative Example 2 in the same manner as in Example 7. These were obtained by changing the amount of the aqueous solution of deacetylated chitin.

Examples 3 and 4 and Comparative Example 2 were measured in the same manner as in Example 1. The results are shown in Table 2.

Comparative Examples 3 and 4 In Comparative Example 3, a base fabric subjected to a water-repellent treatment and a heat treatment similar to that of Example 1 using the same treatment agent as that of Reference Example 3 was used.

A coating solution obtained by mixing 1 part of a solvent-type fluorine-based water repellent and 1 part of trimethylolpropane-hexamethylene diisocyanate (30%) with 100 parts of a polyurethane resin liquid (20% solution) dissolved in dimethylformamide on the cloth. Was coated so as to have a wet adhesion amount of 250 g / m ² (formation of a second layer) by a well-known wet coagulation method. In Comparative Example 4, a non-porous type moisture-permeable polyurethane resin liquid (Synthesis) containing hydrophilic glycols such as general polyethylene glycol in the ester tricot having been subjected to the same pretreatment (first layer) used in Example 3 was used. This is a moisture-permeable waterproof fabric obtained by applying a solution (solid content: 25%) in a dry state by a reverse roll coating method or the like so as to be 10 to 12 g / m ² and drying.

The results are shown in Table 3 for Comparative Example 3 as Comparative Example 3.

From Tables 2 and 3, it is clear that the fabrics according to the present invention have better moisture permeability, anti-condensation and moisture absorption than conventional moisture-permeable and waterproof fabrics.

Example 5 The structure is the same as that of Example 1, but the third layer can be formed by a resin layer containing no chitin-based substance.

By imparting moisture permeability to the third layer, dew condensation preventing properties and moisture absorbing properties are generated. Example 6 Example 6 has the same configuration as Example 1, but the second layer can be formed by a resin layer containing no chitin-based substance.

The third layer further increases the moisture permeability and improves the water absorption of the first and second layers. (See FIG. 3) Example 7 A resin layer containing a chitin-based substance can be directly formed on a base cloth. However, in this case, when the penetration of the resin in the thickness direction of the base cloth increases, the resin solution escapes to the back surface of the base cloth through the base cloth, and as a result, the hand hardens and the tear strength decreases.

Example 8 A water-repellent treatment is applied to a base fabric in advance, and then a moisture-permeable resin layer containing a chitin-based substance can be formed on the base fabric. In this case, since the base fabric has water repellency, the drawback of Embodiment 7 can be covered.

Example 9 A base fabric was impregnated with a liquid formulation containing a chitin-based substance according to Reference Example 1 and subjected to a heat treatment, and then, on one surface of the base fabric, as in Example 3, a moisture-permeable synthetic resin layer was further added. To form a porous polyurethane resin layer containing a chitin-based material.

Example 10 A porous moisture-permeable polyurethane resin layer containing a chitin-based substance was further formed on the porous polyurethane layer of Example 9 to improve the strength such as abrasion resistance.

Example 11 A moisture-permeable resin layer containing a chitin-based substance was formed on release paper, a moisture-permeable resin layer serving as an adhesive was further formed on the resin layer, and a base cloth was pressed thereon to release the release paper. It can be formed by a so-called transfer coating method in which the resin layer is more peeled off.

〔The invention's effect〕

The moisture-permeable waterproof fabric of the present invention has a water absorbing property, a water diffusing property,
The release property and the anti-condensation property are remarkably superior to those of the conventional moisture-permeable waterproof fabric. Therefore, the sweat and the vapor of the sweat are absorbed by the fabric and can be quickly released from the fabric.

Furthermore, chitin-based substances have excellent antibacterial properties, so that products with good antibacterial properties can be made from the fabric according to the present invention.

The fabric according to the present invention is useful in a wide range of applications such as waterproof clothing such as ski wear, windbreakers, diaper covers, sanitary applications, sportswear, underwear, bedding, and other building materials such as wallpaper, inner materials for shoes, and sports hats. Can be used.

[Brief description of the drawings]

1 to 4 show a base cloth according to the present invention and at least two synthetic resin layers sequentially applied to the surface of the base cloth, and at least one of the at least two synthetic resin layers. FIG. 1 is a cross-sectional view showing various examples of a cloth containing a chitin-based material in FIG. 1; FIG. 1 is a cross-sectional view of the cloth of the example in which the number of resin layers is two; FIG. FIG. 3 is a cross-sectional view of a fabric having three layers and an intermediate layer containing a chitin-based material, and FIG. 3 shows a three-layer resin layer and an outer layer containing a chitin-based material. FIG. 4 is a cross-sectional view of the fabric of
The figure is a cross-sectional view of the fabric of the embodiment in which there are three resin layers and the intermediate layer and the outer layer contain a chitin-based substance. DESCRIPTION OF SYMBOLS 1 ... Base fabric, 1a ... Warp, 1b ... Weft, 2 ... Part containing water repellent, 3 ... Resin layer having moisture permeability, 4, 5 ... Chitin-based material and synthetic resin Layer containing 6 ... Chitin-based substance.

──────────────────────────────────────────────────続 き Continuing from the front page (72) Inventor Akio Akita 23-28, Yabashi-cho, Kusatsu-shi, Shiga Prefecture (72) Inventor Tomohisa Uno 499-127 Iwane, Kosai-cho, Koga-gun, Shiga Pref. JP-A-58-183169 (JP, A) (58) Fields investigated (Int. Cl. ⁶ , DB name) D06M 15/00-15/72

Claims (1)

(57) [Claims] [1 claim: a base fabric, made of a waterproof synthetic resin layer having a 3000 g / m ² / 24hours or more moisture permeability of at least two layers which are sequentially applied to the surface of the base fabric, and the synthetic resin layer A moisture-permeable waterproof fabric in which a chitin-based substance is dispersed and contained in at least one layer.