Process for applying a release coating to a wet nonwoven backing

Details Process for applying a release coating to a wet nonwoven backing Process for applying a release coating to a wet nonwoven backing

1990-04-04

1990-11-27

Pianalto, Bernard

Stock material or miscellaneous articles

Structurally defined web or sheet

Discontinuous or differential coating, impregnation or bond

4272088, 4273935, 4274071, 427421, 4274301, 428254, 4284111, B32B 700

Patent

active

049735136

ABSTRACT:
Release coated nonwoven sheet materials are provided through the process of (a) forming a web from fibers; (b) applying a water-based binder to the web; (c) applying a water-based release coating to one side of said web while the web is still wet from the application of the binder; and (d) drying said web. This process eliminates at least one heating step, with unexpected control of the migration of the release coating through the web.

REFERENCES:
patent: 2532011 (1950-11-01), Dahlquist et al.
patent: 3121021 (1964-02-01), Copeland
patent: 3364063 (1968-01-01), Satas
patent: 3575782 (1971-04-01), Hansen
patent: 3677788 (1972-07-01), Zirnite
patent: 4427737 (1984-01-01), Cilento et al.
patent: 4728571 (1988-03-01), Clemens et al.

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