Waterproof water-vapor-permeable laminated structure and applica

Details Waterproof water-vapor-permeable laminated structure and applica Waterproof water-vapor-permeable laminated structure and applica

1988-06-15

1989-08-15

Van Balen, William J.

Stock material or miscellaneous articles

Structurally defined web or sheet

Discontinuous or differential coating, impregnation or bond

428290, 4283044, 4283066, 4283084, 4283099, 4283166, B32B 326

Patent

active

048573930

ABSTRACT:
A waterproof water-vapor-permeable laminated structure obtained by extrusion-laminating a thermoplastic resin layer on a porous base material. This laminated structure is free from pin holes and has a good waterproof property and a feeling of the porous base material. The thermoplastic resin layer to be employed in the laminated structure is selected to have a melt viscosity of 5.times.10.sup.4 poise (measurement conditions: load=10 kgf, nozzle diameter=1 mm, nozzle length=1 mm: JIS K 7311, 10) at a temperature lower than an extrusion temperature by 20.degree. C. The laminated structure is suitable for use as a medical waterproof fabric, an inner bag of a coverlet and the like products.

REFERENCES:
patent: 4803116 (1989-02-01), Amano et al.

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