POLYESTER, BLOW-MOLDED PRODUCT THEREFROM, SHEET-LIKE MATERIAL AND ORIENTED FILM

Japanese Patent JP3736669

B2

PROBLEM TO BE SOLVED: To obtain a polyester having excellent transparency, heat resistance and mechanical characteristics, containing small amount of remaining foreign taste and nasty smell, excellent in smell-retaining properties, hardly causing dirt on a mold when molding the polyester, and capable of providing a blow molded product, a sheet-like material, an oriented film, and a container or a packaging material formed therefrom.
SOLUTION: This polyester is the one treated with water in a chip shape after polycondensation. The polyester is obtained by using raw materials consisting essentially of an aromatic dicarboxylic acid or an ester-forming derivative, a glycol or an ester-forming derivative thereof, and has ≤50 ppb content of acetic acid and ≤50 ppb content of formic acid.

WO/2023/083265	POLYETHYLENE GLYCOL MONOMETHYL ETHER-POLYLACTIC ACID COPOLYMER, AND PREPARATION METHOD THEREFOR AND USE THEREOF
JP2002356544	LOW-DIELECTRIC ELECTRONIC MATERIAL AND RESIN COMPOSITION FOR THE SAME
JP5567581	High-purity polylactic acid, its salt or its derivative, and its purification method

Yoshinao Matsui
Hirotoshi Sonoda
Kimihiro Mizushima
Yoshitaka Eto

JP25790399A

January 18, 2006

September 10, 1999

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TOYO BOSEKI KABUSHIKI KAISHA

C08G63/90; C08J5/18; B29C47/00; B29C55/02; B29D22/00; C08G63/183; C08G63/88; (IPC1-7): C08G63/88; B29C47/00; B29C55/02; B29D22/00; C08G63/183; C08J5/18; //B29K67:00; B29L7:00; C08L67:00

JP11181064A

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