Title:
POLYMER ALLOY OF COPOLYESTER RESIN AND POLYCARBONATE RESIN, AND PACKAGING MATERIAL AND PACKAGING CONTAINER MADE THEREFROM
Document Type and Number:
Japanese Patent JP3725915
Kind Code:
B2
Abstract:
PURPOSE: To obtain a polymer alloy which can give a food packaging container excellent in heat resistance, hot water resistance, etc., under specified sterilization conditions by blending a copolyester resin with a polycarbonate resin.
CONSTITUTION: This polymer alloy comprises a copolyester resin and a polycarbonate resin. The copolyester resin has a solubility parameter [defined by the formula (wherein Δei is the evaporation energy of each atom or each group of atms; and Δvi is its molar vol.)] of 10.8-11.9 and is produced from an acid component comprising 2,6-naphthalenedicarboxylic acid and terephtalic acid or their lower-alkyl esters and a glycol component comprising 1,4- cyclohexanedimethanol and ethylene glycol. The polymer alloy, when molded by a suitable method, gives a food packaging container exhibiting excellent resistances to heat, hot water, and cold impact under thermal sterilization conditions of 85°C×30min and having sufficient gas barrier properties.
Inventors:
Youichiro Inoue
Eiichi Kai
Mr. Kazuhiro Hama
Shin Sekine
Takashi Shirane
Fukawa Yuzo
Shinichiro Mori
Yasuhiro Harada
Junichi Kitagawa
Eiichi Kai
Mr. Kazuhiro Hama
Shin Sekine
Takashi Shirane
Fukawa Yuzo
Shinichiro Mori
Yasuhiro Harada
Junichi Kitagawa
Application Number:
JP17957595A
Publication Date:
December 14, 2005
Filing Date:
June 22, 1995
Export Citation:
Assignee:
Kyodo Printing Co., Ltd.
JFE Chemical Co., Ltd.
JFE Chemical Co., Ltd.
International Classes:
B29C49/00; C08G63/181; C08G63/189; C08G63/199; C08L67/00; C08L67/02; C08L69/00; (IPC1-7): C08L67/02; B29C49/00; C08L69/00
Domestic Patent References:
| JP6145377A | ||||
| JP616793A | ||||
| JP5140278A |
Attorney, Agent or Firm:
Keisuke Watanabe
Yoshihiro Yamaguchi
Yoshihiro Yamaguchi