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US 2012/0132363 A1Published application
Moisture-permeable waterproof fabric and process for producing same
AssigneeSeiren Co., Ltd.
InventorsYoshiharu Kato, Katsumi Sakamoto
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AssigneeSeiren Co., Ltd.
InventorsYoshiharu Kato, Katsumi Sakamoto
Estimating the term…
A moisture-permeable waterproof fabric which has a well-balanced combination of moisture permeability and waterproofing properties and has excellent strength, in particular, tensile strength, is provided without increasing environmental burden. A synthetic-polymer solution comprising a synthetic polymer consisting mainly of a polyurethane, fine inorganic particles, and a polar organic solvent is applied to one surface of a fibrous fabric and then brought into contact with a gaseous phase in which waterdrops having an average particle diameter of 1-30 μm have been evenly dispersed, thereby making the synthetic polymer semisolid. The fabric is then immersed in water to completely solidify the polymer and thereby obtain a moisture-permeable waterproof fabric comprising the fibrous fabric and, united to one surface thereof, a microporous film of a single-layer structure comprising the synthetic polymer consisting mainly of a polyurethane (the number of micropores having a pore diameter of 0.1-5 μm is (5-200)×104/mm2 in a vertical cross-section, and the film has a tensile strength of 3-80 MPa, a moisture permeability as measured by the calcium chloride method of 6,000 g/m2·24 hr or higher or a moisture permeability as measured by the potassium acetate method of 6,000 g/m2·24 hr or higher, and a water pressure resistance of 60 kPa or higher).
A moisture-permeable waterproof fabric comprising a fibrous fabric and, layered to one surface thereof, a microporous layer of a substantially single-layer structure comprising a synthetic polymer consisting mainly of a polyurethane resin, wherein the number of micropores having a pore diameter of 0.1-5 μm in said microporous layer is (5−200)×104/mm2 in a vertical cross-section thereof, a tensile strength of said microporous layer film is 3-80 MPa, the degree of moisture permeability as measured by JIS L-1099 A-1 method (the calcium chloride method) of said moisture-permeable waterproof fabric is 6,000 g/m2·24 hours or higher or the degree of moisture permeability as measured by JIS L-1099 B-1 method (the potassium acetate method) of said moisture-permeable waterproof fabric is 6,000 g/m2·24 hours or higher, and a water pressure resistance as measured by JIS L-1092 B method (a high water pressure method) of said moisture-permeable waterproof fabric is 60 kPa or higher.
A process for producing a moisture-permeable waterproof fabric which comprises
A process for producing a moisture-permeable waterproof fabric which comprises
Dependencies are inferred from the claim text.