Method for pretreating thermoplastic substrates containing carbo

Details Method for pretreating thermoplastic substrates containing carbo Method for pretreating thermoplastic substrates containing carbo

1983-08-18

1984-05-15

Powell, William A.

Stock material or miscellaneous articles

Structurally defined web or sheet

Including variation in thickness

156651, 156668, 204 30, 204 38B, 427307, 428323, B32B 300, C25D 500, B05D 304, B29C 1708

Patent

active

044488360

ABSTRACT:
The pretreating of thermoplastic substrates containing carbonamide groups and an inorganic, fine-particulate adhesion filler, is improved to produce strongly adhering metal coatings thereon, by combining the following steps: the pickling is divided in at least two partial steps, where the first partial step comprises predipping in a pickling solution such as 50 to 96% sulfuric acid where the surface tension is lowered to at most 25 mN/m at 20.degree. C., and the pretreated plastic is dried at 70.degree. to 110.degree. C. before the actual galvanic metal deposition.

REFERENCES:
patent: 3627576 (1971-12-01), Knorre et al.
patent: 3702285 (1972-11-01), Knorre et al.

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