Method for coating metal cookware

Details Method for coating metal cookware Method for coating metal cookware

1994-12-29

1995-10-31

Pianalto, Bernard

Coating processes

With pretreatment of the base

Etching, swelling, or dissolving out part of the base

427328, 427409, B05D 304

Patent

active

054627699

ABSTRACT:
A method of coating a metal cookware having a cooking surface includes the steps of: (A) roughening and cleaning the cooking surface of the metal cookware; (B) applying a metallic scratch-resistant layer onto the roughened and cleaned cooking surface; and (C) applying an anti-stick layer onto the scratch-resistant layer, whereby the anti-stick layer has a roughness of about 2.5-5.5 .mu.m, a thickness of about 23-36 .mu.m and a pencil hardness of about 8-9 H, the anti-stick layer consisting essentially of polytetrafluoroethylene (PTFE) and perfluoroalkoxy polymers (PFA), the ratio of PTFE to PFA ranging from 55:45 to 60:40.

REFERENCES:
patent: 3900684 (1975-08-01), Edwards
patent: 4070325 (1978-01-01), Vassiliou
patent: 4196256 (1980-04-01), Eddy
patent: 4252859 (1989-02-01), Conrannon
patent: 4395445 (1989-02-01), Gebayer
patent: 4568573 (1989-02-01), Sunade
patent: 4683168 (1989-07-01), Hares
patent: 4808490 (1989-02-01), Tsukuda
patent: 4862609 (1989-09-01), Ulrich

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