JP2002067205A - Moisture permeable waterproof laminate cloth having excellent antidewing properties - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a moisture permeable waterproof laminate cloth capable of being difficult in dew formation on a rear surface of the cloth and maintaining dry touch feeling without stickiness with a skin. SOLUTION: The moisture permeable waterproof laminate cloth comprises a resin layer made of a synthetic polymer of a polyurethane resin main body on a fiber cloth, and a back cloth connected onto the resin layer via an adhesive layer. Moisture absorbability thereof is 1.5% or more, when the back cloth is left to stand for 30 min in an environment having 34 deg.C and 90% RH after the back cloth arrives at an equilibrium moisture regain in an environment having 25 deg.C and 60% RH. Moisture dischargeability thereof is 2% or more, when the back cloth is left to stand for 30 min in an environment having 25 deg.C and 60% RH after the back cloth arrives at the equilibrium moisture regain in the environment having 34 deg.C and 95% RH. The laminate cloth has excellent antidewing properties.

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 laminated fabric capable of maintaining a dry feel without stickiness to the skin.

[0002]

2. Description of the Related Art A moisture-permeable waterproof fabric having both moisture-permeable performance and waterproofness has a function of releasing water vapor caused by sweating from the body to the outside of clothing and preventing rain from entering the clothing.
In order to provide these functions, a high-density woven fabric in which yarns are woven at a high density, or a fabric obtained by coating or laminating a polyamino acid urethane resin, a polyurethane resin, a polytetrafluoroethylene resin, or the like on a fabric is well known. These are used for sports clothing and winter clothing,
Among them, it is often used in the sports and outdoor clothing fields, where the amount of sweat caused by exercise is relatively large, and is an indispensable material in the fields of skiing, athletic, and mountain climbing. However, if the ambient temperature drops during wearing,
There is a problem that a large amount of water vapor due to sweating from the body is condensed on the coating surface or the laminate surface, causing a sticky feeling or a cold feeling. As a countermeasure to eliminate such discomfort due to condensation, attempts have been made to make the resin used for coating and laminating hydrophilic, but the effect of preventing condensation is recognized, but the washing durability is poor. was there.

[0003]

DISCLOSURE OF THE INVENTION The present invention has been made in view of the above-mentioned circumstances, and has a moisture-permeation and water-repellent which can maintain a dry feel with less condensation even when a large amount of sweat is worn when worn. The purpose of the present invention is to obtain a functional laminated fabric.

[0004]

Means for Solving the Problems The present inventors have made intensive studies to solve the above-mentioned problems, and as a result, have reached the present invention. That is, the present invention relates to a fiber cloth having a resin layer composed of a synthetic polymer mainly composed of a polyurethane resin, and 25 ° C. × 6.
The cloth which reached equilibrium moisture content under 0% RH environment was 34 ° C x 9
Moisture absorbency when left for 30 minutes in a 0% RH environment is 1.
Moisture-absorbing / desorbing fiber having a moisture-releasing property of 2% by mass or more when the cloth which has reached the equilibrium moisture content in an environment of 5% by mass or more and 34 ° C × 90% RH is left for 30 minutes in an environment of 25 ° C. × 60% RH. The gist of the present invention is a moisture-permeable and waterproof laminated fabric excellent in dew condensation prevention, characterized in that the fabric is laminated and bonded with an adhesive.

[0005]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, the present invention will be described in detail. In the present invention, a fiber cloth having a resin layer composed of a synthetic polymer mainly composed of a polyurethane resin is used. Examples of the fiber cloth used here include polyamide synthetic fibers represented by nylon 6 and nylon 66, polyester synthetic fibers represented by polyethylene terephthalate, polybutylene terephthalate and polypropylene terephthalate, polyvinyl alcohol synthetic fibers, and triacetate. A woven fabric, a knitted fabric, a nonwoven fabric, or the like made of a synthetic fiber or a mixed fiber of nylon 6 / cotton, polyethylene terephthalate / cotton, and the like can be given.

In the present invention, a resin layer made of a synthetic polymer mainly composed of a polyurethane resin is formed on the above-mentioned fiber cloth. Here, in the present invention, a cloth obtained by subjecting the above-mentioned fiber cloth to a water repellent treatment may be used. This is one means for preventing the resin solution from penetrating into the cloth at the time of manufacturing the moisture-permeable waterproof cloth. is there. As the water repellent in this case, a known substance such as a paraffin-based water repellent, a polysiloxane-based water repellent, or a fluorine-based water repellent may be used. A known method such as a spray method may be used. When particularly good water repellency is required, a fluorine-based water repellent is used. For example, Asahi Guard 730 (manufactured by Asahi Glass Co., Ltd., fluorine-based water-repellent emulsion) is used. After padding with a 5% aqueous dispersion (a squeezing rate of 35%), a heat treatment at 160 ° C. for 1 minute may be performed.

The synthetic polymer mainly composed of a polyurethane resin according to the present invention means a polymer containing 50 to 100% by mass of a polyurethane component. Examples of other synthetic polymers include polyacrylic acid, polyvinyl chloride, polystyrene, and polybutadiene. , Polyamino acids and their copolymers
It may be contained in a range of less than mass%, and of course, a compound modified with fluorine, silicon or the like can be used in the present invention.

The polyurethane resin itself is a copolymer obtained by reacting a polyisocyanate and a polyol. As the isocyanate component, an aromatic diisocyanate, an aliphatic diisocyanate or an alicyclic diisocyanate alone or a mixture thereof is used. Tolylene 2,4-diisocyanate, 4,4'-diphenylmethane diisocyanate, 1,6-hexane diisocyanate, 1,4-cyclohexane diisocyanate, or the like may be used as a main component, and if necessary, trifunctional or higher functional isocyanate may be used.

As the polyol component, a polyether polyol or a polyester polyol is used. As the polyether polyol, for example, polyethylene glycol, polypropylene glycol, polytetramethylene glycol or the like is used. As the polyester polyol, for example, ethylene glycol is used. A reaction product of a diol such as propylene glycol and a dibasic acid such as adipic acid and sebacic acid, and a ring-opening polymer such as caprolactone can be used.

When forming the resin layer, the resin layer may be formed on the fabric by a so-called direct coating method in which the resin solution is directly coated on the fiber cloth, or the resin solution may be coated on release paper in advance. The resin layer may be formed on the fabric by a so-called laminating method of forming a film and laminating the film with the fabric.

The direct coating method includes a wet film forming method and a dry film forming method. In the wet film forming method, a polar organic solvent is mixed and used. N-dimethylformamide, dimethylacetamide, dimethylsulfoxide, N-methylpyrrolidone, hexamethylenephosphonamide and the like can be mentioned.

In the dry film forming method, a volatile organic solvent and water are used. Examples of the volatile organic solvent used here include ketones and aromatic hydrocarbons. Examples of the ketones include acetone and methyl ethyl ketone. And aromatic hydrocarbons such as methyl isobutyl ketone, toluene and xylene.

In forming the resin layer, in order to improve the peeling resistance between the resin layer and the fiber cloth, the affinity between the resin and the fiber cloth in the resin solution in the direct coating method and the binder in the lamination method. A compound having a high property may be used in combination, and as the compound, an isocyanate compound can be suitably used.

Examples of the isocyanate compound include tolylene 2,4-diisocyanate, diphenylmethane diisocyanate, isophorone diisocyanate, hexamethylene diisocyanate, or a compound containing 3 moles of these diisocyanates and an active hydrogen (eg, trimethylolpropane, glycerin, etc.). ) Triisocyanates obtained by addition reaction with 1 mol can be used. The above-mentioned isocyanates, even in a form in which an isocyanate group is liberated, or phenol, a lactam, an addition block formed with methyl ketone or the like,
It may be of a type that is dissociated by heat treatment, and may be appropriately used depending on workability, use, and the like.

In order to apply the resin solution onto the fiber cloth by the direct coating method, a usual coating method, for example, a coating method using a knife coater or a comma coater may be used. In the laminating method, a resin solution may be coated on release paper using a knife over roll coater or the like, and after dry film formation, it may be laminated on a fiber cloth with a polyurethane adhesive.

In the present invention, a water-repellent treatment may be applied to the obtained coated or laminated fabric for the purpose of further improving waterproofness. At the time of the water-repellent treatment, a known water-repellent treatment method which is generally performed as described above may be employed.

Among the above-mentioned film forming methods, a direct coating method is preferable as a method for exhibiting the dew condensation preventing property, moisture permeability and waterproof property of the fiber cloth in a well-balanced and highly advanced manner. A porous layer obtained by a wet film forming method containing hydrophobic silicon dioxide fine powder having an average particle size of 0.1 μm or less and an N, N-dimethylformamide adsorption amount of 300 ml / 100 g or more; A non-porous layer formed on the porous layer by a dry film-forming method, or a polyurethane resin having an average particle size of 0.1 μm or less and an adsorption amount of N, N-dimethylformamide of 300 ml / 100g
The above hydrophobic silicon dioxide fine powder and the maximum particle size of 10μ
m or less, and containing the inorganic fine powder having a maximum particle size of 10 μm or less on the porous layer or the porous layer obtained by the wet film forming method. A non-porous layer formed by a dry film forming method is particularly preferable.

Examples of the hydrophobic silicon dioxide fine powder used herein include powders finely divided by a usual wet pulverization method and a ball mill pulverization method, gas phase oxidation method of metal halide, combustion hydrolysis method, electric arc method and the like. Examples of the fine powder obtained by the dry method, in which the number of silanol groups present on the surface of the fine powder is reduced by reacting with an organic silicon halide such as dimethyldichlorosilane or an alcohol to reduce the number thereof, may be mentioned. . The fine powder obtained by these methods generally has a particle size of 0.05 μm or less, is substantially non-porous, and has a very large amount of adsorbed N, N-dimethylformamide.

The amount of N, N-dimethylformamide adsorbed herein means that 5 g of the fine powder is placed on a flat glass plate.
Each time one drop of N, N-dimethylformamide was added, the kneading operation using a stainless steel spatula was repeated, and the N, N-dimethyl which was required immediately before it became soft immediately with one drop of N, N-dimethylformamide was used. Means the volume of formamide (unit: milliliter)
SK-5101 is obtained by using N, N-dimethylformamide instead of oil in the boiled linseed.

Preferably, the hydrophobic silicon dioxide fine powder is used in an amount of 3 to 30% by mass based on the above-mentioned synthetic polymer mainly composed of a polyurethane resin. If the number is small, it is difficult to obtain high moisture permeability, and even if it is used in an amount of more than 30% by mass, further improvement in moisture permeability is not easily recognized, and the resin film becomes brittle.

For the purpose of imparting the dew condensation preventing effect also to the resin film, a hydrophilic inorganic fine powder may be used in combination. As inorganic fine powder having hydrophilicity, aluminum oxide, titanium oxide, silica gel, using a known gas phase method, liquid phase method, autoclave method, mechanochemical method, etc.
Surfaces of inorganic substances such as zinc oxide and magnesia are treated with alcohol,
The surface of the fine powder is treated with an organic acid, an organic amine, an organic silyl compound or the like to make the surface hydrophilic, and is not particularly limited in the present invention, but preferably a hydrophilic silicon dioxide fine powder is used.

The hydrophilic silicon dioxide-based fine powder is mainly composed of porous hydrous silicic acid or hydrous silicic acid obtained by a wet method such as a method of neutralizing sodium silicate with an acid or a method of decomposing acidic clay as a raw material with sulfuric acid. And a fine powder having a hydrophilic group such as a silanol group obtained by the dry method. The hydrophilic silicon dioxide fine powder may be a fine powder containing at least 50% of a silicon dioxide component. For example, it may contain calcium oxide, magnesium oxide, aluminum oxide, and the like as other components. It can be used in combination with substances, pigments and fillers.

The maximum particle size of the inorganic fine powder having hydrophilicity is as follows:
It is necessary that the thickness be 10 μm or less, and if it exceeds 10 μm, it is not preferable because it adversely affects the waterproof performance and the like of the obtained coated fabric. The amount of the fine powder to be added is preferably 1 to 10% by mass based on the above-mentioned synthetic polymer mainly composed of a polyurethane resin. If the amount is less than 1% by mass, the dew condensation preventing property of the obtained coated fabric is poor and 10% by mass.
It is not preferable to use a larger amount because the dew condensation preventing property is hardly improved, and the coating resin becomes unstable, thereby lowering the working efficiency.

When the porous layer containing the above-mentioned hydrophobic silicon dioxide fine powder and / or the inorganic fine powder having hydrophilicity is formed on the fiber cloth, the amount of the coating is as follows. For example, in order to obtain a water pressure resistance of 60 kPa or more, it is possible to adjust the coating amount so that the dry resin film mass becomes 10 g / m ² or more, preferably 15 g / m ² or more. Good.

The amount of coating when the nonporous layer is formed on the porous layer may be appropriately determined depending on the desired waterproofness and moisture permeability.
g / m ^{2 to} 15 g / m ² , preferably 1 g / m ²
The coating amount is adjusted so as to be 10 g / m ² or less. If it is less than 0.5 g / m ^2, it is difficult to obtain a high degree of waterproof performance, and if it is more than 15 g / m ² , it is difficult to obtain a high degree of moisture permeability, which is not preferable.

In the present invention, a fiber cloth having a resin layer composed of a synthetic polymer mainly composed of a polyurethane resin obtained as described above and a cloth which has reached an equilibrium moisture content under an environment of 25 ° C. × 60% RH are used. 1.5% by mass or more at 34 ° C × 90% RH when left for 30 minutes in a 34 ° C × 90% RH environment.
% RH at 25 ° C x 60
A moisture-absorbing / desorbing fiber cloth having a moisture-releasing property of 2% by mass or more when left for 30 minutes in a% RH environment is laminated and bonded with an adhesive.

The moisture-absorbing and desorbing fiber cloth used in the present invention is 25
The above-mentioned cloth which reached the equilibrium moisture content in an environment of 34 ° C. × 90% RH was 1.5% or more when left in an environment of 34 ° C. × 90% RH. The cloth which has reached the equilibrium moisture content must have a moisture absorption / desorption property of 2% or more when left in a 25 ° C. × 60% RH environment for 30 minutes.

Here, the temperature and humidity conditions of 34 ° C. × 90% RH generally correspond to the temperature and humidity conditions between the human body and the clothes when a person wears clothes from early summer to midsummer. The temperature / humidity condition of ° C × 60% RH is based on an average temperature / humidity state and an indoor environment throughout the year. Therefore, when the lining which has reached the equilibrium moisture content in a 25 ° C. × 60% RH environment is left in a 34 ° C. × 90% RH environment for 30 minutes, the hygroscopicity is 1.5% or more, preferably 2.
When the content is 5% or more, the water vapor of the sweat discharged from the human body can be quickly absorbed. 34 ° C ×
Lining that reaches equilibrium moisture content under 90% RH environment is 25 ° C x
Moisture release when left in a 60% RH environment for 30 minutes is 2
% Or more, and preferably 3% or more, the moisture inside the fiber once absorbed can be quickly released to the space outside the clothing having a lower temperature and humidity than the space inside the clothing.

In practice, the synthetic fiber absorbs the sweat of the water vapor discharged from the human body while simultaneously absorbing the water and releasing the sweat out of the clothes. Therefore, it is difficult to measure the hygroscopicity and the hygroscopicity separately. The index was used in the definition of hygroscopicity and moisture release described above. By using the fiber cloth having the moisture absorbing and releasing performance, the moisture-permeable waterproof laminated fabric of the present invention can have a high degree of dew condensation preventing performance.

The constituent fibers of the moisture-absorbing and desorbing fiber fabric used herein include natural fibers such as cotton, wool and silk, regenerated fibers such as rayon, solvent-spun cellulose fibers, and a moisture-absorbing and desorbing component and a fiber-forming polymer. Synthetic fibers and the like can be mentioned. Among these, in consideration of washing durability, wear durability and the like, a hygroscopic synthetic fiber composed of a hygroscopic component and a fiber-forming polymer can be particularly preferably used.

The moisture-absorbing / desorbing component used here may be any component which satisfies the above-mentioned moisture-absorbing / desorbing performance and has little change in color tone. Preferably, it is a modified polyalkylene oxide obtained by reacting a polyalkylene oxide with a polyol and an aliphatic diisocyanate compound.
In particular, a modified product obtained by the reaction of one or more compounds selected from the following groups is also preferable from the viewpoint that melt spinning can be performed simultaneously with the fiber-forming polymer.

Polyalkylene oxides include polyethylene oxide and polypropylene oxide, and copolymers of both. Polyols such as glycols such as ethylene glycol, diethylene glycol and propylene glycol, and aliphatic diisocyanates include alicyclic diisocyanates. Dicyclohexylmethane-4,4'-diisocyanate, 1,6-hexamethylene diisocyanate, and the like. Here, it is not preferable to use a diisocyanate containing an aromatic component because coloring during spinning or yellowing of the obtained fiber with time is observed.

Examples of the fiber-forming polymer used for the moisture absorbing / releasing synthetic fiber include nylon 6, nylon 6 and the like.
6, polyamides such as nylon 46, polyesters such as polyethylene terephthalate, polytrimethylene terephthalate, and polybutylene terephthalate; polyolefins such as polyethylene and polypropylene; and copolymers thereof, but are not limited thereto. However, among these, it is preferable to use a polyamide which does not undergo dye transfer sublimation from the viewpoint of forming a coating resin layer described later on a fiber cloth. Further, additives such as a matting agent, an ultraviolet absorber, a pigment, a light stabilizer, and a heat-resistant agent may be added to the fiber-forming polymer.

The hygroscopic synthetic fiber used in the present invention comprises a hygroscopic component and a fiber-forming polymer.
As a form, for example, a moisture-absorbing and releasing component, a fiber in which a fiber-forming polymer component is uniformly or non-uniformly blended,
Blends of various conjugate fibers such as core-sheath type, side-by-side type, sea-island type and multi-segment type in which one component is divided into multiple components by the other component. A conjugate fiber of the product as one component and a fiber-forming polymer.

The moisture-absorbing / desorbing component may be disposed on either the inner layer and / or the outer layer of the fiber. However, when used for clothing, the moisture-absorbing / desorbing component is not exposed on the fiber surface.
It is particularly preferable to dispose it in the inner layer (core portion) since there is no occurrence of slimy feeling or uneven dyeing at the time of moisture absorption and the fastness of dyeing does not decrease.

The composition ratio of the moisture absorbing / releasing component and the fiber-forming polymer in the present invention may be set so as to simultaneously satisfy the above-mentioned moisture absorbing and releasing properties, and may be determined according to the purpose and application. . For example, when using the above-mentioned modified polyalkylene oxide as a moisture absorbing and releasing component,
The range of 3 to 50% by mass relative to the mass of the fiber is preferred.

The single-filament fineness of the moisture-absorbing / releasing synthetic fiber is generally preferably in the range of 0.1 to 22 dtex, but is not particularly limited, and may have any cross-sectional shape. . Furthermore, the hygroscopic synthetic fiber of the present invention is preferably used as a multifilament long fiber from the viewpoint of cost, but it is also possible to shorten the fiber and use it as a spun yarn.

According to the present invention, there is provided a fiber cloth comprising at least a portion of the above-mentioned moisture-absorbing and desorbing fibers, and the above-mentioned moisture-absorbing and desorbing fibers may be used at 100%. Woven or knitted fabric using a mixed fiber consisting of a synthetic fiber composed of moisture-absorbing and releasing synthetic fibers and other fibers. Here, the mixing ratio when other fibers are used is not particularly limited in the present invention as long as it does not impair the moisture absorption / release performance.

In the present invention, a fiber cloth having a resin layer composed of a synthetic polymer mainly composed of a polyurethane resin and the above-mentioned moisture-absorbing and releasing fiber cloth are laminated and bonded with an adhesive. As the adhesive used in the present invention, a polyurethane resin is preferable from the viewpoint of adhesion durability and flexibility.

The polyurethane resin used as the adhesive herein is a resin having a urethane bond obtained from an isocyanate group and a hydroxyl group in the same molecule as described above, or a resin derived from the aforementioned isocyanate compound. In the present invention, a low molecular polyol having a molecular weight of 1000 or less, for example, a method of directly combining a polyol component such as ethylene glycol, diethylene glycol, 1,4-butanediol, and 1,6-hexanediol with an isocyanate compound, or a polyol component or an isocyanate compound. Polymer polyols such as the aforementioned polyether diols, polyester diols and polycaprolactone diols and isocyanate compounds such as tolylene 2,4-diisocyanate and 4,4′-diphenylmethane diisocyanate And a urethane prepolymer modified to have both terminal isocyanate groups or both terminal hydroxyl groups.

When the terminal group of the obtained resin is a hydroxyl group, the above-mentioned isocyanate compound may be used in combination with the resin, and the amount thereof is preferably within the above-mentioned range. Is improved. When both ends of the obtained resin are isocyanate groups, the resin may be used alone, or a compound having active hydrogen such as the above-mentioned polyol, epoxy resin, neoprene (registered trademark) may be used in combination. . Further, for the purpose of accelerating the curing speed of the resin, a tin-based catalyst such as tin octylate and dibutyltin dioctate, and an amine-based catalyst such as triethylamine and triethylenediamine may be used in combination.

In the present invention, the adhesive is uniformly applied over the entire surface of the resin layer composed of the above-mentioned polyurethane resin-based synthetic polymer. The non-entire surface here means that the adhesive occupied area ratio is 20 to 60%, preferably 30 to 50%, and when the occupied area ratio is less than 20%, the peeling performance between the adhesive layer and the laminating cloth is reduced. If it is not more than 60%, the moisture permeability and the dew condensation prevention performance are undesirably deteriorated.

For the application method, a known gravure coater, rotary screen, flat screen or the like is used when the above-mentioned adhesive is a solvent-based or water-based adhesive, and an applicator or the like is used for a hot-melt type adhesive. What is necessary is just to apply | coat uniformly to desired shapes, such as a shape, a line shape, a checkered pattern, and a turtle pattern, and when laminating, you may just employ | adopt well-known methods, such as normal compression bonding or thermocompression bonding.

The moisture-permeable waterproof laminated fabric of the present invention in which a fiber fabric having a resin layer composed of a synthetic polymer composed mainly of a polyurethane resin and a moisture-absorbing and desorbing fiber fabric are uniformly laminated and adhered over the entire surface by an adhesive. The amount of dew condensation is preferably 10 g / m
Or less ^2-15 minutes, more preferably 5 g / ^{m 2} ·
15 minutes or less. When the amount of condensation is more than 10g / m 2 · ¹⁵ minutes, when the environmental temperature decreases during wear, increases the condensation amount, there may occur a cold feeling and sticky feeling. The present invention has the above configuration.

[0045]

The moisture-permeable and waterproof laminated fabric of the present invention exhibits excellent moisture absorption and desorption properties. In general, the moisture-permeable waterproof fabric releases water vapor due to sweat from the body to the outside of the garment due to the difference in vapor pressure between the inside and outside of the garment. Due to the above excellent moisture absorption performance of the fiber fabric, the water vapor in the clothes is forcibly captured,
Further, it is considered that the trapped water vapor is released to the outside of the clothes due to its excellent moisture releasing property, and has an effect of assisting the moisture permeability. As a result, even if the amount of perspiration is large, water vapor is forcibly and efficiently released to the outside of the clothing and diffused, so that a dry feeling without stickiness can be maintained without storing moisture in the clothing.

[0046]

Next, the present invention will be described more specifically with reference to examples. The measurement and evaluation of the performance in the examples were performed by the following methods. (1) Melt viscosity of modified polyalkylene oxide
g using a flow tester (CFT-50 manufactured by Shimadzu Corporation)
0D), a load of 50 kg / cm ² and a temperature of 170
C., a die diameter of 1 mm, and a die length of 1 mm.

(2) Water Absorbing Capacity (g / g) of Modified Polyalkylene Oxide 1 g of the weighed polyalkylene oxide modified product was added to 200 ml of pure water, and stirred for 24 hours.
The solution was filtered through a 200-mesh wire gauze, and the mass of the gel after the filtration was defined as the water absorption capacity [g (pure water) / g (resin)].

(3) Hygroscopicity and Moisture Release The sample was dried at a temperature of 105 ° C. for 2 hours, and the mass W₀Measure
And left for 24 hours under the condition of 25 ° C. × 60% RH.
And the sample mass W₁Is measured. Next, this sample was placed at 34 ° C.
× 90% RH, sample weight W after 30 minutes ₂
Is measured. Subsequently, the sample was further subjected to 34 ° C. × 90% R
H for 24 hours, and the sample weight W₃Measured
Then, it was transferred again under the condition of 25 ° C. × 60% RH, and after 30 minutes
Sample mass W of₄Is measured. W obtained here₀~ W₄
Was substituted into the following equation to determine the hygroscopicity and the moisture release. Hygroscopicity (%) = [(W₂-W₁) / W₀] × 100 Moisture release (%) = [(W₃-W₄) / W₀] X 100

(4) Dew Condensation A rubber band was attached to a stainless steel cup (inner diameter, height: 10 cm, thickness: 1 mm) containing 500 ml of warm water at 40 ° C. with the coated surface of the sample facing the direction of warm water. Then, it was placed in an environment of 10 ° C. × 60% RH, and after being left for 15 minutes, the state of dew condensation was visually observed, and the amount of water adhering to the coating surface was measured to determine the amount of dew condensation.

(5) Water resistance JIS L-1092 (high water pressure method)

(6) Moisture permeability JIS L-1099 (A-1 method)

Example 1 Nylon 6 multifilament 12 was used for both the warp and the weft.
Using 0dtex / 48f, warp density 80 yarns / 2.5
Weaving a ripstop fabric with a weft density of 76 yarns / 2.5 cm, scouring and pre-setting by a conventional method using the greige machine, and then adding 2% omf to Suminol Fast Yellow 2GP (Sumitomo Chemical Co., Ltd., acid dye). And stained. Next, the dyed cloth is padded with a 7% aqueous dispersion of an emulsion type fluorine-based water repellent Asahigard LS-317 (manufactured by Asahi Glass Co., Ltd.) (squeezing ratio: 35%), dried, and then heat-treated at 170 ° C. for 30 seconds. Was done. Thereafter, using a calendering machine having a mirror-finished roll, the temperature was set to 170 ° C. and the pressure was set to 250.
Calendar processing was performed under the conditions of kPa and a speed of 30 m / min to obtain a base fabric for coating.

Using the base cloth, a polyurethane resin solution having a resin solid content concentration of 19% as shown in the following prescription 1 was applied onto the base cloth for coating at a coating amount of 150 g / m ² using a knife over roll coater. After that, drying is performed at 80 ° C. for 2 minutes, heat treatment is performed at 150 ° C. for 1 minute, and a resin layer made of a polyurethane resin-based synthetic polymer is formed by a direct coating method (dry film forming method). Formed.

Formulation 1 Heimlen X-3038 100 parts (polyurethane resin, manufactured by Dainichi Seika Kogyo Co., Ltd.) Resamine X 2 parts (isocyanate compound, manufactured by Dainichi Seika Kogyo Co., Ltd.) Methyl ethyl ketone 15 parts Toluene 15 parts Water 40 parts

Next, a moisture-absorbing / desorbing fiber cloth was prepared by the following method. 83.7 parts by mass of nylon 6 having a relative viscosity of 2.6 measured at a temperature of 20 ° C. in a concentration of 0.5 g / deciliter in m-cresol solvent as a fiber-forming polymer;
Polyethylene oxide, 1,4-
Butanediol and dicyclohexylmethane-4,4
Modified polyethylene oxaside which is a reaction product of '-diisocyanate (water absorption capacity 35 g / g, melt viscosity 4000
Poise) 16 parts by mass, and 1- [2-
{3- (3,5-Di-tert-butyl-4-hydroxyphenyl) propionyloxy} ethyl] -4- {3-
A mixture obtained by dry blending with 0.3 parts by mass of (3,5-di5-di-tert-butyl-4-hydroxyphenyl) propionyloxy} -2,2,6,6-tetramethylpiperidine (SANOLLS2626 manufactured by Sankyo) was used. The core component, the above nylon 6 is used as a sheath component, and the mass ratio of the core component / sheath component is 25 /
75 core-sheath composite fibers were melt spun. At this time, the spinning temperature is set to 255 using a spinneret having 12 discharge holes.
The melt spun at ℃, the spun yarn is cooled by blowing air at 18 ° C., the oil agent is applied, and then wound up at 1300 m / min, stretched 2.1 times, and subjected to core-sheath moisture absorption / release. Synthetic fiber 33
dtex / 12f was obtained. The modified polyethylene oxide was synthesized according to the method for producing a water-absorbing resin described in JP-A-6-316623.

The above-mentioned core-sheath type moisture absorbing / releasing synthetic fiber 33dtex /
Using a 12f, knit a 28-gauge tricot and use the greige to scour it in a conventional manner. Suminol Fast Yellow
It was dyed with 2GP (2% omf, manufactured by Sumitomo Chemical Co., Ltd., acid dye) and finished and set to obtain a moisture-absorbing and releasing fiber knitted fabric.

On the resin layer on which the resin layer composed of the above-mentioned synthetic polymer mainly composed of polyurethane resin was formed, 25 mesh,
250 μm depth, 40% adhesive occupation area ratio, circular dot shape (dot width: 0.7 mm, dot interval: 0.35 mm)
A polyurethane resin-based adhesive solution having a resin solid content of 40% as shown in the following prescription 2 is applied using a gravure roll, dried at 130 ° C. for 2 minutes, and dried at 130 ° C. under a pressure of 290 kPa. Crimping the knit, then 50
Aging was performed at a temperature of 3 ° C. for 3 days to obtain a moisture-permeable and waterproof laminated fabric of the present invention (referred to as Example 1).

Formulation 2 UD-108 100 parts (ester type urethane resin, manufactured by Seiko Chemical Co., Ltd.) Platamide H-103 5 parts (polyamide hot melt adhesive, manufactured by Elf Atochem Japan K.K.) Coronate HL 10 parts ( Isocyanate compound, manufactured by Nippon Polyurethane Industry Co., Ltd.) UY-5 1 part (Organic tin accelerator, manufactured by Seiko Chemical Co., Ltd.) N, N-dimethylformamide 10 parts Methyl ethyl ketone 20 parts

Comparative Example 1 For comparison with the present invention, the procedure of Example 1 was repeated except that the moisture-absorbing / desorbing component used in the core portion of the core-sheath type moisture-absorbing / desorbing synthetic fiber was omitted, and only the nylon 6 was used as the core component. By the same method as in Example 1, a moisture-permeable and waterproof laminated fabric for comparison (referred to as Comparative Example 1).
I got The performance of the moisture-permeable waterproof laminated fabric of the present invention and Comparative Example 1 was measured and evaluated, and the results are shown in Table 1.

[0060]

[Table 1]

As is clear from Table 1, the moisture-permeable and waterproof laminated fabric of the present invention has very good moisture-permeability and waterproofness, and has a small amount of dew condensation, and is hardly dew-condensed.

Example 2 Polyethylene terephthalate multifilament 56d
tex / 24f is used for both the front yarn and the back yarn, and the course density is 55 yarns / 2.5 cm and the wale density is 4
One / 2.5 cm tricot half is knitted, scoured by a conventional method using the greige machine, and after presetting, Kayalon Po
Lyeester Blue2R-SL (manufactured by Nippon Kayaku Co., Ltd., disperse dye) was dyed with 2% omf to obtain a base fabric for lamination used in the present invention.

Next, a moisture-absorbing and desorbing fiber fabric was prepared by the following method. 80 parts by mass of polyethylene terephthalate having a relative viscosity of 1.38 measured at a temperature of 25 ° C. at a concentration of 0.5 g / deciliter in a mixed solvent of equal weights of phenol and tetrachloroethane as a fiber-forming polymer, and polyethylene as a moisture absorbing and releasing component Modified polyethylene oxaside which is a reaction product of oxide, 1,4-butanediol and dicyclohexylmethane-4,4'-diisocyanate (water absorption capacity 35 g / g, melt viscosity 4000 poise)
A mixture obtained by dry blending 20 parts by mass with a core component, the above polyethylene terephthalate as a sheath component, and a core component /
A core / sheath type composite fiber having a sheath component mass ratio of 50/50 was melt-spun. At that time, using a spinneret having 24 discharge holes, melt spinning was performed at a spinning temperature of 270 ° C., and the spun yarn was cooled by blowing air at 15 ° C. to apply an oil agent. / Min and stretched 1.5 times to obtain a core-sheath type moisture-absorbing and releasing synthetic fiber 33dtex / 12f used as a lining of the present invention. The modified polyethylene oxaside was synthesized according to the method for producing a water-absorbing resin described in JP-A-6-316623.

The above-mentioned core-sheath type moisture-absorbing / synthesizing synthetic fiber 33 dtex /
Knit a 28 gauge tricot using 12f and scour it in the usual way using the greige machine, Kayalon Polyester Bl
ue2R-SL (Nippon Kayaku Kogyo Co., Ltd., disperse dye) 2% o
After dyeing and finishing with mf, a moisture-absorbing and releasing fiber fabric used in the present invention was prepared.

Next, a resin solid content of 18% shown in the following prescription 3
Was applied on release paper using a knife over roll coater at an application amount of 65 g / m ² , followed by drying at 80 ° C. for 3 minutes.

Formulation 3 Heimlen NPU-5 100 parts (Polyurethane resin, manufactured by Dainichi Seika Kogyo Co., Ltd.) Toluene 20 parts Isopropyl alcohol 20 parts

On the polyurethane resin layer formed as described above, a polyurethane adhesive solution represented by the following formula 4 was applied using a knife over roll coater to give a coating amount of 4%.
After coating at 5 g / m ² , drying was performed at 60 ° C. for 3 minutes, the above-mentioned polyester for lamination was bonded thereto, and thermocompression bonding was performed at 90 ° C. and 980 kPa. Subsequently, after aging at room temperature for 72 hours, the release paper was peeled off, and a resin layer composed of a synthetic polymer mainly composed of a polyurethane resin was formed by a lamination method.

Formulation 4 Crisbon N-184 100 parts (diol compound, manufactured by Dainippon Ink and Chemicals, Inc.) Burnock DN-950 10 parts (isocyanate compound, manufactured by Dainippon Ink and Chemicals, Inc.) Accel T 3 parts (catalyst, Dainippon Ink and Chemicals, Inc.) Toluene 40 parts

Next, a 25-mesh, 250 μm deep, 40% adhesive occupying area ratio, circular dot (dot width: 0.7 mm, dot interval: 0.35 mm) gravure roll was used on the resin layer described below. The polyurethane resin-based adhesive solution shown in Formulation 4 is applied, dried at 130 ° C. for 2 minutes, and the above-described moisture-absorbing / desorbing fiber fabric is pressed at 290 kPa, and then aged at 50 ° C. for 3 days. Thus, a moisture-permeable and waterproof laminated fabric of the present invention (referred to as Example 2) was obtained.

Comparative Example 2 For comparison with the present invention, the procedure of Example 2 was repeated except that the moisture-absorbing / desorbing component used in the core portion of the core-sheath type moisture-absorbing / desorbing synthetic fiber was omitted, and the core component was made only of polyethylene terephthalate. In the same manner as in Example 2, a comparative moisture-permeable and waterproof laminated fabric (Comparative Example 2) was obtained. The performances of the present invention and the comparative moisture-permeable waterproof fabric were measured and evaluated, and the results are shown in Table 2.

[0071]

[Table 2]

As is evident from Table 2, the moisture-permeable and waterproof laminated fabric of the present invention has very good moisture-permeability and waterproofness, and has a small amount of dew condensation, and is hardly dew-condensed.

Example 3 Using the nylon base cloth for coating used in Example 1, a polyurethane resin solution having a composition shown in the following formulation 5 and having a solid content of 25% and a viscosity of 15000 mPa · s (25 ° C.) was used. Coating amount 1 on calender surface using coater
Immediately after application at 50 g / m ² ,
The resin component was solidified by immersion for 0 seconds, followed by washing with warm water at 50 ° C. for 10 minutes, followed by drying to form a porous resin layer containing 9% by mass of inorganic fine powder.

Formulation 5 Lac Skin 1740-29B 100 parts (Seiko Kasei Co., Ltd., polyurethane resin for wet process) Resamine X 1 part (Dainichi Seika Kogyo Co., Ltd., isocyanate compound) N, N-dimethylformamide 25 parts AEROSIL R -972 3 parts (Nippon Aerosil Co., Ltd., average particle size is about 0.016μ
m, N, N-dimethylformamide adsorption amount 350ml / 100g silicon dioxide fine powder)

Next, the coated surface is padded with a 6% aqueous dispersion of Asahigard LS-317 to reduce the water repellency (squeezing rate: 30%), and then dried, and heat-treated at 170 ° C. for 40 seconds to perform direct coating. A porous resin layer made of a synthetic polymer mainly composed of a polyurethane resin was formed by a method (wet film forming method).

Next, a mesh having a depth of 25 was formed on the resin layer.
Using a gravure roll of 0 μm, an adhesive occupying area ratio of 40%, and a circular dot shape (dot width: 0.7 mm, dot interval: 0.35 mm), a resin solid content concentration of 40% shown in Formulation 2 of Example 1 was used. Apply a polyurethane resin adhesive solution,
After drying at 130 ° C. for 2 minutes, the moisture-absorbing and desorbing fiber fabric of Example 1 was pressure-bonded at a pressure of 290 kPa.
Aging was performed at a temperature of 3 ° C. for 3 days to obtain a moisture-permeable and waterproof laminated fabric of the present invention (referred to as Example 3).

Example 4 On a porous resin layer containing 9% by mass of the inorganic fine powder of Example 3, a polyurethane having the composition shown in the following formulation 6 and having a solid content of 25% and a viscosity of 2500 mPa · s (25 ° C.) The resin solution was applied using a floating knife coater so that the coating amount per 1 m ² was 16 g.
For 3 minutes to form a resin layer composed of a synthetic polymer mainly composed of a polyurethane resin. On the resin layer, a polyurethane resin-based adhesive solution was applied in exactly the same manner as in Example 1, and the moisture-absorbing and desorbing fiber fabric of Example 1 was press-bonded, and the moisture-permeable waterproof laminated fabric of the present invention ( Example 4) was obtained.

Formulation 6 Rackskin U2514-1 100 parts (ether-type polyurethane resin manufactured by Seiko Chemical Co., Ltd.) Isopropyl alcohol 10 parts Toluene 15 parts

Comparative Examples 3 and 4 For comparison with the present invention, the core-and-seal type moisture-absorbing and desorbing synthetic fibers of Examples 3 and 4 were omitted except that the core component was used as nylon 6 only. A moisture-permeable waterproof laminated fabric for comparison (Comparative Example 3) was produced in exactly the same manner as in Examples 3 and 4.
And 4). The performances of the moisture-permeable waterproof fabrics of the present invention and Comparative Examples 3 and 4 were measured and evaluated, and the results are shown in Table 3.

[0080]

[Table 3]

As is apparent from Table 3, the moisture-permeable waterproof fabric of the present invention has a high degree of moisture permeability and waterproofness, has a small amount of dew condensation, and is hardly condensed.

Example 5 Using the nylon coating fabric of Example 1, the composition shown in the following formulation 7 was used, and the solid content concentration was 25% and the viscosity was 11,000.
A mPa · s (25 ° C.) polyurethane resin solution was applied to the above calender surface at a coating amount of 100 g / m ² using a knife over roll coater, and immediately immersed in water at 15 ° C. for 40 seconds to obtain a resin component. Is coagulated, followed by 50
After washing in warm water at 10 ° C. for 10 minutes, drying was performed to form a porous resin layer containing 14% by mass of hydrophobic silicon dioxide fine powder and 4% by mass of hydrophilic silicon dioxide fine powder.

Formulation 7 Rackskin 1740-29B 100 parts (ester type polyurethane resin manufactured by Seiko Chemical Co., Ltd.) Resamine X 1 part (isocyanate compound manufactured by Dainichi Seika Industry Co., Ltd.) N, N-dimethylformamide 35 parts AEROSIL® -972 5 parts (Nippon Aerosil Co., Ltd., average particle size is about 0.016μ
Hydrophobic silicon dioxide fine powder with m, N, N-dimethylformamide adsorption amount of 350 ml / 100 g) Nipsil E200 1.5 parts 製 Nippon Silica Industry Co., Ltd., water-containing type with a particle size of 9 μm or less (average particle size 2.5 μm) Hydrophilic silicon dioxide fine powder

The coated surface was padded with a 6% aqueous dispersion of Asahigard LS-317 (aperture ratio: 30%), and then dried, and heat-treated at 170 ° C. for 40 seconds to obtain a direct coating method (water-repellent treatment). A resin layer composed of a synthetic polymer mainly composed of a polyurethane resin was formed by a wet film forming method.

Next, a gravure roll of 25 mesh, 250 μm depth, 40% adhesive occupying area ratio, circular dot shape (dot width: 0.7 mm, dot interval: 0.35 mm) was formed on the resin layer. A polyurethane resin-based adhesive solution having a resin solid content concentration of 40% shown in Formulation 2 described in Example 1 was applied, dried at 130 ° C. for 2 minutes, and dried at 290 kPa.
Then, the moisture-absorbing and desorbing fiber fabric of Example 1 was press-bonded at 50 ° C. and then aged at 50 ° C. for 3 days to obtain a moisture-permeable and waterproof laminated fabric of the present invention (referred to as Example 5).

Example 6 On the coating surface of the moisture-permeable waterproof cloth of Example 5, a composition having the composition shown in Formula 8 below and having a solid content of 25% and a viscosity of 2500 m
The polyurethane resin solution of Pa · s (25 ℃), using a floating knife coater, after the coating amount per 1 m ² was coated to a 16g, hydrophilic silicon dioxide system by drying for 3 minutes at 100 ° C. Fine A non-porous resin film containing 5% by mass of the powder was formed, and a resin layer composed of a polyurethane resin-based synthetic polymer having a dry resin coating amount of 4.0 g per m ² was formed. Next, the moisture-absorbing and desorbing fiber fabric of Example 1 was pressure-bonded in exactly the same manner as in Example 1 to obtain a moisture-permeable waterproof laminated fabric (Example 6) of the present invention.

Formulation 8 Rack Skin U2514-1 100 parts (Ether type polyurethane resin, manufactured by Seiko Chemical Co., Ltd.) Isopropyl alcohol 10 parts Toluene 15 parts Nipsil E200 1.5 parts 製 Nippon Silica Industry Co., Ltd., particle size of 9 μm or less (average Hydrous hydrophilic silicon dioxide fine powder with a particle size of 2.5 μm).

Comparative Examples 5 and 6 For comparison with the present invention, the moisture-absorbing / desorbing component used for the core portion of the core-sheath type moisture-absorbing / desorbing synthetic fiber constituting the moisture-absorbing / desorbing fiber fabric was omitted, and the core component was changed to nylon 6 only. Example 5 except for using
A comparative moisture-permeable waterproof laminated fabric (Comparative Examples 5 and 6) was obtained in exactly the same manner as in Comparative Examples 5 and 6. The performance of the moisture-permeable waterproof fabrics of the present invention and Comparative Examples 5 and 6 was measured and evaluated, and the results are shown in Table 4.

[0089]

[Table 4]

As is clear from Table 4, the moisture-permeable and waterproof laminated fabric of the present invention has a high degree of moisture permeability and waterproofness, has a small amount of dew condensation, and is hardly condensed. Further, Comparative Example 5, due to the effect of the hydrophilic silicon dioxide fine powder contained in the coating resin film for improving the dew condensation property,
6, the moisture-permeable waterproof laminated fabric of the present invention in which the woven fabric made of nylon 6 used in the comparative example is replaced with a woven fabric made of a core-sheath type moisture-absorbing and releasing synthetic fiber. It can be seen that the moisture absorption / desorption effect of the core-sheath type moisture absorption / desorption synthetic fiber and the effect of the hydrophilic silicon dioxide fine powder are combined to have a higher dew condensation property.

[0091]

According to the present invention, it is possible to provide a moisture-permeable and waterproof laminated fabric which has good moisture absorption and desorption properties, hardly causes dew condensation, and can maintain a dry feel.

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) D06M 17/00 D06N 7/06 4L033 17/10 D01F 8/12 Z 4L041 D06N 7/06 D04B 1/16 4L048 // D01F 8/12 21/00 B D04B 1/16 D06M 17/00 H 21/00 11/12 F term (reference) 4F055 AA27 BA11 CA14 EA04 EA05 EA07 EA22 EA24 FA15 GA02 GA32 4F100 AH02C AH03C AK18 AK48 AK51A AK51G AK54C AL06C BA03 BA07 BA10B BA10C DG01B DG01C DG11B DG11C DG13 DG20C EH46 EJ19 GB72 JD04 JD15C JD16C JD20 JL07 YY00C 4L002 AA06 AB05 AC00 DA01 BA03 A AA08 AB05 AB06 AC03 AC07 CA50 DA06 4L041 BA02 BA05 BA21 BC02 CA06 CA21 CA35 DD01 DD18 4L048 AA21 AA24 AA28 AC15 CA07 CA08 DA01

Claims (5)

[Claims] 1. A fiber cloth having a resin layer composed of a synthetic polymer mainly composed of a polyurethane resin, and a cloth which has reached an equilibrium moisture content in an environment of 25 ° C. × 60% RH at a temperature of 34 ° C. × 90% RH. The fabric that has a moisture absorption of 1.5% by mass or more when left for 30 minutes and has reached an equilibrium moisture content in a 34 ° C × 90% RH environment has a moisture release property when left for 30 minutes in a 25 ° C. × 60% RH environment. 2% by mass or more of the moisture-absorbing and desorbing fiber fabric,
A moisture-permeable and waterproof laminated fabric excellent in anti-condensation properties, wherein the laminated fabric is laminated and bonded with an adhesive. 2. The moisture-permeable and waterproof laminated fabric excellent in dew condensation prevention properties according to claim 1, wherein the constituent fibers of the moisture-absorbing and releasing fiber fabric comprise a moisture absorbing and releasing component and a fiber-forming synthetic polymer. 3. The moisture-permeable and waterproof laminate according to claim 2, wherein the moisture-absorbing and releasing component is a modified polyalkylene oxide obtained by reacting a polyalkylene oxide with a polyol and an aliphatic diisocyanate compound. Fabric. 4. The moisture-permeable and waterproof laminated fabric excellent in dew condensation prevention properties according to claim 2 or 3, wherein the constituent fibers of the moisture-absorbing and releasing fiber fabric are core-sheath type composite fibers having a moisture absorbing and releasing component in the core. Wherein the amount of condensation is less than 10g / m 2 · ¹⁵ minutes claims 1 to 4 excellent moisture permeable waterproof laminated fabric condensation preventing property described.