The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 06, 1976
Filed:
Jun. 27, 1974
Ikuya Hayashi, Inuyama, JA;
Yukio Yamane, Ootsu, JA;
Chiyozi Hitomi, Ootsu, JA;
Keiske Miyake, Ootsu, JA;
Toyo Boseki Kabushiki Kaisha, , JA;
Abstract
A polyester block copolymer film excellent in slip characteristics and blocking resistance, which is prepared by melt extruding a polyester block copolymer in a film and cooling the film in a melt state at a temperature of about 40.degree. to 120.degree.C to solidify it, the polyester block copolymer comprising 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 alone being not lower than about 200.degree.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.degree.C.