Process for the production of water vapor-permeable sheet materi

Details Process for the production of water vapor-permeable sheet materi Process for the production of water vapor-permeable sheet materi

1980-04-30

1982-06-22

Lusignan, Michael R.

Stock material or miscellaneous articles

Web or sheet containing structurally defined element or...

Composite having voids in a component

427244, 427245, 427246, 427373, 427387, 427391, 427411, 428904, 4283193, 264 459, 264129, B05D 302, B05D 500, B32B 518, B32B 2700

Patent

active

043363008

ABSTRACT:
The specification describes water vapor-permeability sheet materials, particularly useful in the footwear industry. The production of sheet materials which are water permeable, highly resistant to wear, water resistant and mechanically stressable occurs by mechanically foaming a polymeric dispersion, the mechanical foaming being carried out in the presence of a surfactant, the density of the film being adjusted by the mechanical foaming to 0.55-0.85 g/cm.sup.3, gelling the foamed dispersion at a temperature of 120.degree. to 220.degree. C., for at most 10 minutes, and finishing the sheet material by spraying and/or rastering.

REFERENCES:
patent: 3527653 (1970-09-01), Summer et al.
patent: 4175154 (1979-11-01), Faust et al.
patent: 4176210 (1979-11-01), Skinner

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