Diafoil Hoechst Company, Limited

Masashi Tate

Kazuo Endo

Megumi Komiyama

Yoshinori Sato

Disclosed is a film for high heat-sensitive stencil paper, comprising a biaxially oriented film having a thickness of 0.5 to 6.0 .mu.m and formed from a polyester composition comprising polybutylene terephthalate and another polyester, a ratio of the polybutylene terephthalate in the whole polyester being 20 to 80 wt %, a maximum value of average heat shrinkage stresses in the machine and transverse directions of the film measured at a film temperature of 60.degree. to 140.degree. C. being more than 300 g/mm.sup.2, and a heat shrinkage of the film by treatment at 100.degree. C. for 3 minutes being not less than 20%.

Film for high heat-sensitive stencil paper

A film for heat-sensitive stencil paper comprising a biaxially oriented film having a thickness of 0.5 to 6.0 .mu.m and formed from a polyester composition comprising polybutylene terephthalate and at least one other polyester, the content of the polybutylene terephthalate in the polyester composition being 20 to 80 wt %, the polyester composition has one melting point or a plurality of melting points with a difference of less than 10.degree. C. between the highest melting point and the lowest melting point.

Growing community of inventors

Yokohama, Japan

Masashi Tate