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AssigneeDiafoil Hoechst Company, Limited
InventorsKazuo Endo, Megumi Komiyama, Shinobu Suzuki
Estimating the term…
A heat sensitive original sheet for stencil printing made of a laminate of a paper sheet and a biaxially oriented polyester film having a melting point of 150.degree. to 240.degree., a thickness of 0.2 to 3 .mu.m, an average refractive index of 1.570 to 1.578, a thermal shrinkage stress of 100 to 800 g/mm.sup.2 after being treated at 80.degree. C. for 10 seconds, a thermal shrinkage factor of 5 to 50% after being treated at 80.degree. C. for 10 minutes, a shrinkage factor of 15% or less after being treated in toluene at 25.degree. C. for 10 minutes, and a center line average surface roughness of 0.02 to 0.3 .mu.m, which original sheet is excellent in a perforation sensitivity, resistance to curling, and resolution and image density of a printed image.
A film for a heat sensitive original sheet for stencil printing comprising a biaxially oriented polyester film comprising a blend of polybutylene terephthalate with polyethylene terephthalate or a blend of polybutylene terephthalate with a polyethylene terephthalate copolymer, the film having a melting point of 150.degree. to 240.degree. C. and a thickness of 0.2 to 3 .mu.m, which satisfies all the following properties (1) to (5):
Dependencies are inferred from the claim text.