Kyodo Printing Co., Ltd.

Nkk Corporation

Daiwa Can Company

Yoichiro Inoue

Junichi Kitagawa

Junji Yamada

Takashi Shirane

Shinichi Sekine

Kayo Hasegawa

Shinichiro Mori

Yasuhiro Harada

Yuuzou Fukawa

Shigeyuki Ikeharaya

Kazuhiro Hamauji

Eiichi Kai

A laminate has a core layer and a skin layer on either side of the core layer, wherein the skin layer is formed of a copolymer having a glass transition point of 85&#xb0; C. or more and 115&#xb0; C. or below and consisting of 2,6-naphthalene dicarboxylic acid or its lower alkyl ester, terephthalic acid or its lower alkyl ester and ethylene glycol or a polymer alloy having a glass transition point of 85&#xb0; C. or more and 115&#xb0; C. or below and consisting of polyethylene terephthalate and polyethylene-2,6-naphthalate. Thus, it can be used suitably as a packaging container for food and drink, such as jelly containers, which has flavor resistance and aroma retention sufficient not to be limited by types of flavor used for jelly or the like, excels in sealing properties with a lid body, can be hermetically sealed with an easy-peel transparent lid body, and is also superior in gas barrier properties, impact resistance, heat resistance, cost efficiency and transparency.

Laminates and packaging containers

1. An ester copolymer resin having a general formula �I!.

Ester copolymer resin, alloy thereof and packaging material using the

1. An ester copolymer resin having a general formula �I!. ##STR1## wherein Ar represents 2,6-naphthalene group or phenylene group, R represents ethylene group or 1,4-cyclohexylene group, and n is a number of 100 to 1000 and a polymer alloy having a solubility parameter of 10.8 to 11.9 consisting essentialy of the ester copolymer and a polycarbonate resin are provided. The ester resin and the alloy are transparent and has a beat resistance and a hot water resistance (resistance to whitening) resisting sterilization of food, a good heat sealability to aluminum closure, and recycling ability with PET resin.

Growing community of inventors

Tokyo, Japan

Yoichiro Inoue