Plastic and nonmetallic article shaping or treating: processes – Pore forming in situ – Composite article making
Patent
1979-02-22
1981-01-13
Anderson, Philip
Plastic and nonmetallic article shaping or treating: processes
Pore forming in situ
Composite article making
264 54, 264DIG82, B29D 2700
Patent
active
042448999
ABSTRACT:
A process for embossing a thermoplastic polymeric material by selective expansion which comprises forming into sheet form an expandable mix containing a thermoplastic polymeric material and a chemical blowing agent, applying to selected areas of the surface of the sheet an activator ink composition in the form of a plastisol or organosol containing a vinyl resin, a plasticizer for the vinyl resin, and a kicker for the chemical blowing agent in the expandable mix, and heating the sheet to a temperature and for a time such that in those areas of the sheet in contact with the kicker-containing activator ink composition, the chemical blowing agent is decomposed to a greater degree than in the remaining areas and the sheet is thereby differentially selectively expanded.
REFERENCES:
patent: 3293094 (1966-12-01), Nairn et al.
patent: 3373072 (1968-03-01), Jones
patent: 3399106 (1978-08-01), Palmer et al.
patent: 3464934 (1969-09-01), Birkett et al.
patent: 3819783 (1974-06-01), Jones
patent: 3821059 (1974-06-01), Hensel
Anderson Philip
Congoleum Corporation
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