Method for chemical embossing a foamable thermoplastic resin sheet using an ink composition containing a chemical blowing agent
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United States of America Patent
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-
Jan 13, 1981
Issued Date -
N/A
app pub date -
Feb 22, 1979
filing date -
Oct 7, 1975
priority date (Note) -
Expired
status (Latency Note)
Importance
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.
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