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US 4,229,523 AGranted
Method of undercoating treatment of polyester films for photographic light-sensitive materials
AssigneeKonishiroku Photo Industry Co., Ltd.
InventorsHideyasu Ohta, Jun Shirasaki, Masaru Kanbe, Naoto Abe, Takahiro Uozumi, Masayoshi Mayama
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Abstract
A method of undercoating a polyester film of a light sensitive photographic material is disclosed in which one side of the film is pretreated such that the contact angle with water is below 58.degree.. Additionally, a layer of an aqueous dispersion containing no organic solvent is applied to said side of said film, said dispersion containing a copolymer containing up to 60% by weight of glycidyl methacrylate and 25-60% by weight of ethyl acrylate.
Claims7
A method of coating a polyester film of a light-sensitive photographic material comprising
- (a) treating a side of said film by the method selected from the group consisting of corona discharge, ultraviolet irradiation, or flame treatment whereby the contact angle between said side and water is below 58.degree.,
- (b) applying to said treated side a layer of an aqueous dispersion containing no organic solvent acting as a solvent or swelling agent, said dispersion containing a copolymer having, as repeating units, 20 to 60% by weight of glycidyl methacrylate and 25 to 60% by weight of ethylacrylate, the sum of said glycidyl methacrylate and said ethyl methacrylate, being at least 76% by weight based on the weight of said copolymer whereby a coated side is formed, and
- (c) subjecting said coated side to a temperature of between 60.degree. C. and 150.degree. C. whereby said coated side is dried and said layer has a weight of 0.05 to 5.0 g/m.sup.2, and
- (d) applying to said dried coated side a silver halide emulsion layer.
1 more element
Dependencies are inferred from the claim text.