Internally coated webs

Details Internally coated webs Internally coated webs

1991-04-02

1993-05-11

Cannon, James C.

Stock material or miscellaneous articles

Structurally defined web or sheet

Discontinuous or differential coating, impregnation or bond

427358, 427387, 427412, 428246, 428248, 428252, 428272, 428274, 428286, 428287, 428290, 4283066, 4283084, 4283111, 4283115, 4283117, 428447, 428904, 428913, B32B 532, D06M 15643, D06M 1570

Patent

active

052099652

ABSTRACT:
An improved process is provided for treating a porous web (especially fabric) to produce a novel silicone polymer internally coated web. In the process, a starting curable liquid silicone polymer is coated under pressure upon one surface of the web, and the web is then subjected to localized shear forces sufficient to move the silicone polymer composition into interior portions of the web and to distribute the silicone polymer composition generally uniformly therewithin in such planar region. Excess silicone polymer composition is wiped away from a web surface. Thereafter, the resulting web is heated or irradiated to cure the silicone polymer. Preferably a web is preliminarily impregnated with a fluorochemical. Webs produced by this process are breathable, waterproof or highly water repellent, and flexible.

REFERENCES:
patent: 3265529 (1966-08-01), Caldwell et al.

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