Coating processes – Foraminous product produced – Filter – sponge – or foam
Patent
1978-01-25
1979-01-02
McCamish, Marion E.
Coating processes
Foraminous product produced
Filter, sponge, or foam
427314, 427316, 427322, 427373, 428 95, 428 97, 428310, 428425, B05D 500
Patent
active
041328175
ABSTRACT:
A method of forming a layer of blown cellular urethane on a primary carpet backing comprising the steps of preparing a mixture of reactive urethane forming agents, controlling the temperature of the reactive mixture, shaping the reactive mixture into a layer upon a latex film, heating the urethane forming mixture to initiate chemical blowing of the mixture, applying the underside of a previously tufted and heated primary carpet backing directly to the upper surface of the mixture, heating the mixture to a predetermined temperature, applying pressure to the carpet and mixture and stripping the carpet and cellular urethane layer from the conveyor belt.
REFERENCES:
patent: 3519526 (1970-07-01), Carey
patent: 4035529 (1977-07-01), Meisert
patent: 4078100 (1978-03-01), Doerfling
McCamish Marion E.
Textile Rubber and Chemical Co., Inc.
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