Waterproof water-vapor-permeable laminated structure and applications of the same
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United States of America Patent
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Aug 15, 1989
Grant Date -
N/A
app pub date -
Jun 15, 1988
filing date -
Jun 19, 1987
priority date (Note) -
Expired
status (Latency Note)
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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.
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