Water-vapor-permeable waterproof composite fabric, waterproof textile article containing same and process for producing same

A process for producing a water-vapor-permeable waterproof composite fabric comprising;

• forming a film having a thickness of 5 to 50 μm and comprising a polyether-ester elastomer (PEE-A) comprising polyalkyleneglycol residues, alkyleneglycol residues and dicarboxylic acid residues, the PEE-A containing polyethylene glycol residues in an amount of 5 to 25% by mass based on the total mass of the PEE-A;
• preparing a solution of a polyether-ester elastomer (PEE-B) comprising polyalkyleneglycol residues, alkyleneglycol residues and dicarboxylic acid residues and having a melting temperature of 20° C. or more below that of the PEE-A, in an organic solvent;
• laminating the PEE-A film to a surface of a substrate fabric comprising a fiber material through a coating layer of the PEE-B solution in an amount of PEE-B of 2 to 20 g/m2;
• and
• heat-pressing the resultant laminate under a pressure at the melting temperature. of the PEE-B or higher and lower than the melting temperature of the PEE-A, to thereby bind the PEE-A film layer to the substrate fabric through the PEE-B binder layer.

A process for producing a water-vapor-permeable waterproof composite fabric comprising:

• forming a film having a thickness of 5 to 50 μm and comprising a polyether-ester elastomer (PEE-A) comprising polyalkyleneglycol residues, alkyleneglycol residues and dicarboxylic acid residues, the PEE-A containing polyethylene glycol residues in an amount of 5 to 25% by mass based on the total mass of the PEE-A;
• preparing a solution of a polyether-ester elastomer (PEE-B) comprising polyalkyleneglycol residues, alkyleneglycol residues and dicarboxylic acid residues, and having a melting temperature of 20° C. or more below that of the PEE-A, in an organic solvent;
• coating the PEE-B solution in an amount of PEE-B of 2 to 20 g/m2 on a surface of the PEE-B film;
• drying the coated PEE-B solution layer on the PEE-B film surface to form a PEE-B binder layer;
• laminating the PEE-A film to a surface of a substrate fabric comprising a fiber material through the dried PEE-B binder, layer;
• and
• heat pressing the resultant laminate under a pressure at the melting temperature of the PEE-B or higher and lower than the melting temperature of the PEE-A, to thereby bind the PEE-A film layer to the substrate fabric through the PEE-B binder layer.

A process for producing a water-vapor-permeable waterproof composite fabric comprising;

• forming a film having a thickness of 5 to 50 μm and comprising a polyether-ester elastomer (PEE-A) comprising polyalkyleneglycol residues, alkyleneglycol residues and dicarboxylic acid residues, the PEE-A containing polyethylene glycol residues in an amount of 5 to 25% by mass based on the total mass of the PEE-A;
• preparing a melt of a polyether-ester elastomer (PEE-B) comprising polyalkyleneglycol residues, alkyleneglycol residues and dicarboxylic acid residues and having a melting temperature of 20° C. or more below that of the PEE-A;
• coating a surface of the PEE-A film with the melt of the PEE-B in a coating amount of 2 to 20 g/m2;
• laminating the PEE-A film to a surface of a substrate fabric comprising a fiber material through the PEE-B layer;
• and
• heat-pressing the resultant laminate at the melting temperature of the PEE-B or higher and lower than the melting temperature of the PEE-A under pressure.