C - Chemistry – Metallurgy – 08 – L
Patent
C - Chemistry, Metallurgy
08
L
400/2014, 18/794
C08L 67/00 (2006.01) B29C 47/00 (2006.01) C08G 63/60 (2006.01) C08G 63/672 (2006.01)
Patent
CA 1037634
Abstract of the Disclosure A polyester block copolymer film having good slip characteristics and blocking resistance is disclosed. The film is prepared by melt extruding a polyester block copolymer to form a film and cooling the film in a melt state at a temperature of about 40 to 120°C to solidify it. The polyester block copolymer comprises crystalline polyester segments and non-crystalline polymer segments in a weight ratio of 99 : 1 to 10 : 90 and having a number average molecular weight of about 10,000 to 100,000, the melting point of a self-supporting high polymer substantially constituted with the monomer components of the said crystalline polyester segments along being not lower than about 200°C and the melting point or softening point of a polymer substantially constituted with the said non-crystalline polymer segments themselves being not higher than about 80°C. The resulting film can be used for the same purposes as conventional polyester block copolymer film, but it does not require lubricants in order to make the film easy to handle.
203758
Hayashi Ikuya
Hitomi Chiyozi
Miyake Keiske
Yamane Yukio
Na
Toyo Boseki Kabushiki Kaisha
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