Surface treatment of microporous material

Details Surface treatment of microporous material Surface treatment of microporous material

1973-09-27

1976-01-06

Martin, William D.

Coating processes

Foraminous product produced

Microporous coating

427278, 427322, 427336, 427378, B05D 500, B05D 312, B05D 310, B05D 304

Patent

active

039314375

ABSTRACT:
A sheet material having a microporous surface of elastomeric polyurethane is treated to produce a sheet, which has greater water-proofness and still transmits water vapor, by applying to it a coagulated layer of elastomeric polyurethane. Preferably the coagulated layer is produced by applying a pigmented polyurethane solution to the sheet while it is wet with a non-solvent. The coagulated layer may then be treated in various ways; e.g. it may be embossed or treated with a solvent to form a fused glossy moisture vapor-transmitting surface. The product is suitable for use as a leather substitute in shoe uppers.

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patent: 3671375 (1972-06-01), Buskirk
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