Konica Corporation

Tetsutaro Hashimura

Takatoshi Yajima

Hiroshi Naito

Hiromitsu Araki

Hideyuki Kobayashi

Kenji Nakanishi

Yoshioki Okubo

Yoshioki Ohkubo

Disclosed is a film constituted of a polyester, said film having a degree of roll set curl of not higher than 135 m.sup.-1 after being subjected to heat treatment, and having a degree of recovery curl of not higher than 45 m.sup.-1 after being subjected to hot water bath treatment.

Polyester layer support for photographic material

A support for photographic use comprised of at least two polyester layers is disclosed, which comprises a first layer containing a first polyester and a second layer containing a second polyester adjacent to the first layer, the first polyester comprising a first monomer unit from a polyalkylene glycol and a second monomer unit from an aromatic dicarboxylic acid having a metal sulfonate group, wherein the difference between the second monomer unit content of the first polyester and that of the second polyester, .DELTA.SIP is not more than 5.5 mol %, the second monomer unit content being expressed based on the total content of monomer units from dicarboxylic acids contained in the polymer.

Photographic support

Disclosed is a support for a photographic material which comprises a multilayer film in which a layer of a copolymerized polyester is laminated on at least one surface of a polyester layer, wherein the copolymerized polyester contains an aromatic dicarboxylic acid having a metal sulfonate group as a copolymer component in an amount of 2 to 7 mole % based on all ester bond units and further a polyalkylene glycol as a copolymer component in an amount of 3 to 10% by weight based on the total weight of a polyester which is a reaction product.

Support for photographic material

Multilayer polyester support of photographic material

Growing community of inventors

Hohfu, Japan

Tetsutaro Hashimura