JPH04102838U - Heat-retaining, breathable, waterproof fabric - Google Patents

Abstract

(57) [Summary] [Objective] To provide a moisture-permeable waterproof fabric that has excellent moisture permeability and water resistance, feels good on the skin, and has excellent heat retention even if it is thin. [Structure] A heat-retaining, moisture-permeable, waterproof fabric is obtained by laminating a microporous foam layer having closed cells on a fiber base material. In addition, by laminating at least one of a microporous film and a non-porous moisture permeable resin film on a fiber base material, and further laminating a microporous foam layer having closed cells on top of that, heat retention and moisture permeability can be achieved. A waterproof fabric is obtained.

Description

[Detailed explanation of the idea]

0001

[Industrial application field]

In addition to raincoats, this invention is suitable for sports clothing such as windbreakers and ski wear. The present invention relates to a heat-retaining, moisture-permeable, waterproof fabric that is particularly suitable for use in materials such as clothing.

0002

[Conventional technology]

Conventionally, moisture-permeable waterproof fabrics have been made by using a fiber base material with a microporous membrane layer that has moisture permeability. , laminated non-porous film layers, and water-repellent cloth to increase heat retention. A large amount of batting is stuffed between the fabrics, and the moisture-permeable film layer is made of aluminum and carbon. It is known that powders containing inorganic powders such as minerals, ceramics, etc. No. 5, Japanese Patent Publication No. 1-33592, Japanese Patent Application Publication No. 1-291927, etc.).

0003 However, these moisture-permeable and waterproof fabrics are relatively good in terms of moisture permeability and water resistance. However, it feels cold to the touch, and clothing, especially raincoats, windbreakers, and skis, is cold to the touch. - When used on sports clothing such as clothing, it lacks heat retention and sweat condenses. I had a problem. Also, if you use a method of filling with a large amount of batting to increase heat retention, The material is thick, bulky, and difficult to move. Products containing ceramics and the like also had problems such as being cold to the touch.

0004

[Problem that the idea aims to solve]

The purpose of this invention is to have excellent moisture permeability and water resistance, and to feel good on the skin even if it is thin. To provide a moisture-permeable waterproof fabric with excellent heat retention.

[0005]

[Means to solve the problem]

This invention is characterized by laminating a microporous foam layer with closed cells on a fiber base material. It pertains to heat-retaining, moisture-permeable, and waterproof fabrics.

[0006] In addition, the present invention provides a microporous and/or non-porous material directly on the fiber base material or on the fiber base material. A special feature is that a microporous foam layer with closed cells is laminated on top of a porous film. It pertains to a heat-retaining, moisture-permeable, and waterproof fabric with a characteristic characteristic. Microporous coating and non-porous moisture permeable resin coating Either layer may be laminated onto the fiber base material first.

[0007] Compared to a structure in which a microporous foam layer with closed cells is provided directly on a fiber base material. , a microporous film is laminated as an adhesive layer on a fiber base material, and a closed cell layer is formed on top of the microporous film as an adhesive layer. Adhesion is better when a microporous foam layer is provided on the fiber base material. If a moisture-permeable resin film is laminated, it will have excellent water resistance.

[0008] In this invention, the fiber base materials include natural fibers such as cotton, polyamide, and polyester. Woven fabrics, non-woven fabrics, knitted fabrics made of synthetic fibers such as stellate fibers and inorganic fibers such as glass fibers. Any of the following may be mentioned, but there are no particular limitations.

[0009] In the present invention, a microporous film is a film that has communicating pores, and the resin that forms the film includes polyurethane-based, polyamino acid-based, polyacrylic-based, polyamide-based, polyvinylidene chloride-based, and polyester. Examples include polyvinyl acetate-based, polyvinyl alcohol-based, and polyvinyl alcohol-based. Particularly preferred are polyurethane, polyamino acid, and polyacrylic. The microporous film can be formed by applying an organic solvent solution of the above resin polymer to the fiber base material, then dipping it in water and making holes using a wet coagulation method, or applying gelatin or polymer to the above resin. A method in which a film containing a soluble substance such as a moisture absorbent is dissolved in hot or boiling water, or an emulsion in which water is dispersed in an organic solvent solution of the above-mentioned resin polymer is applied to a fiber base material and then dried. , a method in which holes are made by a dry method in which these solvents and water are sequentially evaporated; a pyrolytic foaming agent is added to the above resin, and after being applied to the fiber base material, it is dried and exposed to N ₂ gas, CO ₂ gas, etc. Although a method such as generation is adopted, the method is not particularly limited. The pore size of the microporous film obtained by the above method is preferably in the range of about 1 to 5 μm.

0010 In the present invention, the resin used for the microporous foam layer having closed cells is Resins similar to those forming the porous film can be used. microporous foam A method for forming closed cells in a layer is, for example, mixing air with mechanical stirring. A method of foaming with gas generated during a chemical reaction, a method of foaming with gas generated during a chemical reaction, a method of foaming with liquefied gas, Pressure injection method, use of foaming agents such as pyrolytic or thermally expandable microcapsules Examples include methods such as The method of forming the foam layer is not limited to the above method, but Among the above, thermally expandable microcapsules are especially used in the resin forming the microporous foam layer. A fat polymer is uniformly mixed into an emulsion in which water is dispersed in an organic solvent solution. The most preferable method is to apply a compound prepared by heating and foam it. This person The microporous foam layer is thermally expandable by embedding a vaporizable liquid in a thermoplastic resin membrane. Tonic microcapsules are formed by heating and foaming in a microporous membrane.

[0011] The above-mentioned thermally expandable microcapsules used in this invention are made by converting vaporizable liquid into thermoplastic resin. They are microspheres embedded in a membrane, and when heated to an appropriate temperature, the liquid embedded inside will release. It evaporates, and the pressure causes the entire capsule to expand, creating a foam with an expanded volume (hereinafter referred to as (abbreviated as "foaming" below). As a thermoplastic resin constituting the microcapsules It is preferable that the resin has a softening point of 50 to 200℃, and as this type of resin, polysalt Vinyl chloride, polyvinylidene chloride, polyacrylonitrile, polymethyl acrylate homopolymers such as polymethylmethacrylate, polyvinyl acetate, etc. or copolymers thereof.

0012 As the vaporizable liquid for embedding, low-grade liquids that can be easily microencapsulated and are inexpensive are recommended. Hydrocarbons such as liquid butane are suitable. Microcapsule particles before foaming The diameter is preferably 5 to 30μ, and when heated at 50 to 200℃ for several minutes, it becomes several times larger. It has the property of foaming several tens of times.

[0013] In addition, mixing the thermally expandable microcapsules with the resin that forms the microporous foam layer The ratio is 2 to 500 parts by weight of microcapsules per 100 parts by weight of resin solids in the emulsion. A range of is preferred. If it is less than 2 parts by weight, it will lack a particularly soft feel after foaming, and If the weight part is exceeded, the strength of the foam layer will be weak, the adhesion to the base material will be poor, and the moisture permeability will decrease. This is due to the fact that it is also impaired and undesirable. Further, 5 to 100 parts by weight is particularly preferred. child When mixing thermally expandable microcapsules, for example, dissolver, homodis It is important to mix and disperse uniformly using an appropriate method such as a parlor or paint roll. It is essential.

[0014] In this invention, a foamed or non-foamed film is used as the non-porous moisture permeable resin film. The resin that forms the film is difficult to swell in water and does not form a film. There is no particular restriction as long as the resin is moisture permeable and has the ability to form the microporous film. Resins similar to those described above can be used. For those who form non-porous moisture permeable resin films As a method, a solution, emulsion, etc. of the above resin is applied to a fiber base material or a microporous film. coating method, extrusion and simultaneous lamination of thermoplastic resin, or Examples include a method in which the above-mentioned resin is made into a film in advance and then bonded together. In addition, as the resin forming the non-porous moisture-permeable resin foam layer, the above-mentioned non-porous moisture-permeable resin can be used. The same resin as that forming the oil film can be used. Non-porous moisture permeable resin foam membrane Examples of forming methods include foaming by mechanical stirring, and foaming during a chemical reaction. Methods of foaming using generated gas, methods of pressurizing liquefied gas, and methods of using volatile solutions with low boiling points. Method of mixing or impregnating with agent and vaporizing, thermally decomposable type or thermally expandable microcapsule Examples include a method using a foaming agent such as cell. The method of forming the foam layer is as described above. Although not limited to the methods mentioned above, in particular, heat-expandable microcapsules are Mix the resin polymer uniformly in a solvent solution, apply the resulting compound, and process. The method of forming by thermal foaming is most preferred. With this method, non-porous, moisture-permeable resin The foam layer is a thermally expandable microcapsule made by embedding a vaporizable liquid in a thermoplastic resin film. The foam is formed by heating and foaming in a non-porous, moisture-permeable resin film.

[0015] The above-mentioned thermally expandable microcapsules used in this invention are made by converting vaporizable liquid into thermoplastic resin. They are microspheres embedded in a membrane, and when heated to an appropriate temperature, the liquid embedded inside will release. It evaporates, and the entire capsule expands under the pressure, giving a bubble with expanded volume. Current The thermoplastic resin constituting the microcapsules has a softening point of 50 to 200°C. Polyvinyl chloride, polyvinylidene chloride, etc. are preferred. polyacrylonitrile, polymethyl acrylate, polymethyl methacrylate Examples include homopolymers such as polyvinyl acetate, polyvinyl acetate, and copolymers of these. can be shown.

[0016] As the vaporizable liquid for embedding, low-grade liquids that can be easily microencapsulated and are inexpensive are recommended. Hydrocarbons such as liquid butane are suitable. Microcapsule particles before foaming The diameter is preferably 5 to 30μ, and when heated at 50 to 200℃ for several minutes, it becomes several times larger. It has the property of foaming several tens of times.

[0017] In addition, the resin forming the thermally expandable microcapsules and the non-porous moisture permeable resin foam layer The mixing ratio is 2 to 500 microcapsules per 100 parts by weight of resin solids in the solution. Parts by weight ranges are preferred. If it is less than 2 parts by weight, it will lack a particularly soft feel after foaming. If the amount exceeds 500 parts by weight, the strength of the foam layer will be weak, the adhesion to the base material will be poor, and This is because moisture permeability is also impaired, which is undesirable. In addition, 5 to 100 parts by weight is particularly preferable. stomach. When mixing these thermally expandable microcapsules, for example, a dissolver, a homogeneous Mix and disperse uniformly using an appropriate method such as a disper or paint roll. is important.

[0018] Heat retention can be improved by adding powder of carbon, aluminum, ceramic, etc. to the microporous foam layer, microporous film layer, nonporous moisture permeable resin foam layer, and nonporous moisture permeable resin film layer. increases. Further, powders having a deodorizing effect such as zeolite and activated carbon can also be added. In addition, in order to improve the water leakage resistance of this heat-retaining, moisture-permeable, waterproof fabric, a microporous foam layer, a microporous film, a non-porous moisture-permeable resin film, and a non-porous moisture-permeable resin foam layer are formed. A water repellent may be added internally to the resin, the fiber base material may be treated to make it water repellent before application, it may be treated to make it water repellent after application, or any of these may be combined. Examples of water repellents include wax-based, fluorine-based, silicon-based, and the like. The resulting heat-retaining, moisture-permeable, and waterproof fabric has a moisture permeability of 500 g/m ² ·24 hr or more (JIS Z0208B method) and a water pressure resistance of 0.1 kg/cm ² or more (JIS L-1092).

[0019] The heat-retaining, moisture-permeable, waterproof fabric of this invention can be used for windbreakers, ski wear, etc. It is particularly suitable for sports clothing and the like. Note that this invention is not limited to the above-mentioned applications. In addition to raincoats, medical and dustproof clothing, it can also be used for various purposes such as tents and tarpaulins. Applicable.

[0020]

【Example】

Examples of the present invention will be described below. Note that parts simply indicate parts by weight.

Example 1 The fiber base material was nylon taffeta, and the base material was coated with 100 parts of urethane resin emulsion (trade name "Heimlen / 5 parts of MEK, 2 parts of crosslinking agent (trade name "Rethermin A uniform mixture of 50 parts of the agent (trade name Microsphere F-30D, manufactured by Matsumoto Yushi Seiyaku Co., Ltd.) was coated at 300 g/m ² with a knife coater, dried at 80°C for 2 minutes, and further coated at 130°C for 2 minutes. The microporous foam layer was formed by foaming for a minute. The configuration is shown in Figure 1. Table 1 shows the results of measuring the moisture permeability, water pressure resistance, and heat retention of the heat-retaining, moisture-permeable, waterproof fabric obtained by the above method. The moisture permeability was measured according to the JIS Z0208B method, the water pressure resistance was measured according to JISL-1092, and the heat retention was evaluated by an outdoor wear test (outside temperature 5°C).

Example 2 Nylon taffeta was used as the fiber base material, and 200 g/m ² of the resin of the microporous foam layer of Example 1 (no foaming agent added) was applied to the base material. The mixture was further dried at 30° C. for 2 minutes to form a microporous film, and a microporous foam layer was further formed thereon in the same manner as in Example 1. The configuration is shown in Figure 2. The moisture permeability, water pressure resistance, and heat retention properties of the heat-retaining, moisture-permeable, waterproof fabric obtained by the above method were measured in the same manner as in Example 1.

Example 3 Nylon taffeta was used as the fiber base material, and a microporous membrane was formed on the base material in the same manner as in Example 2. Next, 200 g of a mixture of 100 parts of a urethane resin solution (trade name "Heimlen Y-229", manufactured by Dainichiseika Kaisha, Ltd.), 110 parts of MEK, and 86 parts/4 parts of water/MEK was applied to this microporous film using a knife coater. /m ² and then dried at 70°C for 2 minutes and then at 130°C for 2 minutes to form a non-porous moisture permeable resin film layer. A microporous foam layer was further formed thereon in the same manner as in Example 1. The configuration is shown in Figure 3. The moisture permeability, water pressure resistance, and heat retention properties of the heat-retaining, moisture-permeable, waterproof fabric obtained by the above method were measured in the same manner as in Example 1.

Example 4 The fiber base material was polyester/cotton = 70/30, and the base material contained 100 parts of urethane resin (trade name "Toltex PX-100", manufactured by Dainippon Ink Chemical Co., Ltd.), 10 parts of MEK, and toluene. After applying a mixture of 20 parts and 40 parts of water at 200 g/m ² using a knife coater, it was dried at 70°C for 3 minutes and then at 120°C for 3 minutes to form a microporous film layer. Next, polyethylene glycol and isophorone diisocyanate are heated and polymerized by a conventional method, and the obtained urethane polymer is dissolved in a toluene-isopropanol mixed solvent. Then, 50 parts of thermally expandable microcapsules (trade name "Microsphere F-30D") were added to this solution per 100 parts of the solid content, mixed uniformly, and applied to the above microporous film at a rate of 100 g/ ^m2 . A non-porous, moisture-permeable resin foam layer was formed by drying at 50°C for 20 minutes and then heating and foaming at 130°C for 1 minute.Furthermore, the resin on which the microporous film was formed was foamed. A uniform mixture of 50 parts of the agent (trade name Microsphere F-30D) was applied at 200g/ ^m2 using a knife coater, dried at 80℃ for 2 minutes, and further foamed at 130℃ for 2 minutes to form a microporous material. A foam layer was formed. The structure is shown in Fig. 4. Regarding the heat-retaining, moisture-permeable, waterproof fabric obtained by the above method, the moisture permeability, water pressure resistance, and heat retention were measured in the same manner as in Example 1. 5 to 6 show the structure of the heat-retaining, moisture-permeable, waterproof fabric of the present invention corresponding to claim 3.

Comparative Examples 1 and 2 Comparative Example 1 was obtained by forming only a microporous film (no foaming agent added) on nylon taffeta using the same method as in Example 2, and its structure is shown in FIG. Further, 50 g/m ² of the same resin as that used to form the microporous film of Example 2 was applied as an adhesive layer to nylon taffeta, and a moisture permeable urethane film (trade name "NY-814", Comparative Example 2 was prepared by adhering and laminating 30 μm thickness, moisture permeability 3200 g/m ² 24 hr) manufactured by Toyo Rubber Industries, Ltd. and drying at 70°C for 5 minutes and 130°C for 3 minutes, and its structure is shown in Figure 8.

[0026]

[Table 1] As can be seen from Table 1, both the Example and the Comparative Example have good moisture permeability, but the Example feels warmer and better against the skin when worn than the Comparative Example, and the wetness on the body side after running for 5 minutes has been confirmed. In Examples 3 and 4, the water pressure resistance was excellent. On the other hand, the comparative example feels cool to the touch when worn, and becomes wet after running for 5 minutes.

[0027]

[Effect of the idea]

As described above, the present invention provides microporous material directly on the fiber base material or on the fiber base material. A microporous foam layer with closed cells is laminated on top of a laminated foam or nonporous membrane. As a result, it has good moisture permeability and water resistance, and has good heat retention and texture. We were able to provide a moisture-permeable waterproof fabric.

[Brief explanation of drawings]

1 to 6 are cross-sectional views of a heat-retaining, moisture-permeable, and waterproof fabric according to the present invention.

7-8 are cross-sectional views of fabrics of comparative examples.

[Explanation of symbols]

1 Fiber base material 2 Microporous foam layer with closed cells 3 Microporous film 4 Non-porous moisture permeable resin film 5 Non-porous moisture permeable resin foam layer

──────────────────────────────────────────────── ─── Continued from the front page (51) Int.Cl. ⁵ Identification code Internal reference number FI Technical display location D06N 3/12 102 7141−4F // D06M 23/04 (72) Creator Tomio Shimizu Kako District, Hyogo Prefecture 1176 Uchigaike, Rokubunichi, Inami-cho Toyo Tire & Rubber Industries, Ltd. Hyogo Office Hyogo Factory (72) Designer Hideaki Koga 1176 Uchigaike, Rokubunichi, Inami-cho, Kako-gun, Hyogo Prefecture Toyo Tire & Rubber Industries Co., Ltd. Company Hyogo Office Hyogo Factory

Claims (6)

[Scope of utility model registration request] 1. A heat-retaining, moisture-permeable, waterproof fabric comprising a fiber base material and a microporous foam layer having closed cells laminated thereon. 2. A heat-retaining, moisture-permeable, waterproof fabric comprising a microporous membrane laminated on a fiber base material, and a microporous foam layer having closed cells further laminated thereon. 3. A heat-retaining, moisture-permeable, waterproof fabric comprising a fiber base material, a non-porous moisture-permeable resin film laminated thereon, and a microporous foam layer having closed cells further laminated thereon. Claim 4: A microporous film is laminated on a fiber base material, a non-porous moisture permeable resin film is laminated thereon, and a microporous foam layer having closed cells is further laminated thereon. A heat-retaining, moisture-permeable, waterproof fabric featuring the following. Claim 5: A non-porous moisture permeable resin film is laminated on a fiber base material, a microporous film is laminated on top of that, and a microporous foam layer having closed cells is further laminated on top of that. A heat-retaining, moisture-permeable, waterproof fabric featuring the following. 6. A microporous foam layer having closed cells,
The heat-retaining, moisture-permeable waterproof fabric according to any one of claims 1 to 5, wherein thermally expandable microcapsules formed by embedding a vaporizable liquid in a thermoplastic resin film are formed by heating and foaming in a microporous film. .