Process for the production of a laminate
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United States of America Patent
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-
Feb 12, 1991
Grant Date -
N/A
app pub date -
Jun 29, 1989
filing date -
Jul 7, 1988
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A laminate is produced by bonding together two hydrophobic thermoplastic resin sheets at least one of which carries at least one hydrophilic colloid layer containing a photograph and/or other information on its inner side, by the steps comprising: (1) treating such information-bearing hydrophilic colloid layer with an aqueous composition containing a self-cross-linkable reaction product of: (i) an epihalohydrin or an Alpha-dihalohydrin, (ii) a water-soluble polyamide, and (iii) a water-soluble polyamine containing at least two nitrogen atoms separated by at least three carbon atoms and optionally also by at least one oxygen or sulphur atom and having at least two hydrogen atoms attached to different nitrogen atoms, (2) drying thus treated layer, and (3) applying heat and pressure to bond the hydrophobic resin sheets together with such hydrophilic colloid layer sandwiched there-between.
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