Patent · US Expired

Stripping film material

US5270147A · kind A · utility

10Cited by

7References

8Claims

0Family size

Assignee

Agfa-Gevaert NV · BE

Inventors

Etienne Van Thillo · Essen, BE
Eddie Daems · Herentals, BE
Luc Leenders · Herentals, BE
Guido J. Smits · Kapellen, BE

Key dates

Filing date	Jun 23, 1992
Grant date	Dec 14, 1993
Priority date	—
Expiry date	Jun 23, 2012

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC08J2431/00
WIPO fieldOther special machines
WIPO sectorMechanical engineering

Abstract

A stripping film material comprises a polyethylene terephthalate film base serving as temporary support being coated with a subbing layer essentially consisting of either: PA1 (1) hydroxypropylcellulose wherein the molar degree of substitution (DS) with hydroxypropyl groups is in the range of 3 to 1, or: PA1 (2) a copoly(vinyl acetate/crotonic acid) having a weight ratio of vinyl acetate to crotonic acid in the range of 85/15 to 99/1, wherein said subbing layer is coated with at least one hydrophilic colloid layer which is adapted to be stripped off after being moistened with an aqueous liquid, e.g. by contact with a wet surface of a permanent support.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.