Stripping film material
AssigneeAgfa-Gevaert
InventorsEtienne A. Van Thillo, Eddie R. Daems, Luc H. Leenders, Guido J. Smits
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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: (1) hydroxypropylcellulose wherein the molar degree of substitution (DS) with hydroxypropyl groups is in the range of 3 to 1, or: (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.
Claims8
A stripping film material comprising:
- A. A polyethylene terephthalate film temporary support;
- B. A subbing layer coated on a surface of said temporary support and consisting essentially of either:
- 1. Hydroxypropylcellulose having a molar degree of substitution (DS) of hydroxypropyl groups in the range of 3 to 1, or
- 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;
- and
- C. At least one hydrophilic colloid layer coated on a surface of said subbing layer opposite said temporary support and containing gelatin as the principal hydrophilic colloid thereof, said colloid layer being adapted to be stripped from said subbing layer after being moistened with an aqueous liquid.
Dependencies are inferred from the claim text.