White polyester composition and support for photography
AssigneeKonica Corporation
InventorsKazuto Kiyohara, Hiromitsu Araki, Toshiaki Yamazaki, Ichiya Harada
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Abstract
Disclosed are a white polyester composition comprising a polyester containing a titanium dioxide, and the titanium dioxide being one subjected to a heat treatment at a temperature of 350.degree. C. or higher after at least one of an inorganic surface treatment and an organic surface treatment, and a support for photography having a polyester layer comprising the white polyester composition.
Claims21
In a support for a light-sensitive material, carrying light-sensitive silver halide emulsions for use in photography to produce an image for direct observation, and having a polyester layer consisting essentially of a polyester and a titanium dioxide white pigment, the improvement comprising
- said titanium dioxide having been coated with an organic or inorganic compound and thereafter subjected to a heat treatment under a non-reducible atmosphere at a temperature of 350.degree. C. or higher, and wherein
- the organic compound is a siloxane polymer;
- the inorganic compound is at least one selected from the group consisting of an aluminum compound and a silicon compound;
- and
- said titanium compound is present in an amount of about 1 to 40% by weight based on the polyester.
In a support for comprising a polyester layer containing a titanium dioxide and a film of the white polyester composition which is formed by melt a light-sensitive material, carrying light-sensitive silver halide emulsions for use in photography to produce an image for direct observation, and having a polyester layer consisting essentially of a polyester and a titanium dioxide white pigment, which polyester layer is formed by melt extrusion and biaxial stretching, the improvement comprising
- said titanium dioxide has been coated with an organic or inorganic compound and thereafter subjected to a heat treatment under a non-reducible atmosphere at a temperature of 350.degree. C. or higher, and wherein
- the organic compound is a siloxane polymer;
- the inorganic compound is at least one selected from the group consisting of an aluminum compound and a silicon compound;
- and
- said titanium compound is present in an amount of about 1 to 40% by weight based on the polyester.
Dependencies are inferred from the claim text.