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Title:
PACKAGING CONTAINER
Document Type and Number:
Japanese Patent JP3843143
Kind Code:
B2
Abstract:

PROBLEM TO BE SOLVED: To provide a packaging container made of a cyclic olefin copolymer, preventing an environmental stress crack, being excellent in transparency, impact resistance, gas barrier properties, etc., and having no nonuniform wall thickness and uniform molecular orientation.
SOLUTION: A packaging container comprises an oriented molded article composed of a copolymer of an olefin and a cyclic olefin. The copolymer is oriented and molded at an orienting temperature satisfying the formulas Y≥1.4X-25... (1) and Y≤0.9+70... (2), wherein X represents a glass transition point (°C) of the copolymer, a value of which is 60 to 150°C, and Y represents an orienting temperature (°C). The molded article has a double refractive index (Δn) of at least 50×10-6 and at most 300×10-6 in the direction of maximum molecular orientation.


Inventors:
Koichi Kawaguchi
Maruhashi Yoshitsugu
Application Number:
JP20580995A
Publication Date:
November 08, 2006
Filing Date:
August 11, 1995
Export Citation:
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Assignee:
Toyo Seikan Co., Ltd.
International Classes:
B29D22/00; B65D1/00; B65D1/09; C08F210/00; B29K23/00; (IPC1-7): B65D1/09; B29D22/00; //C08F210/00; B29K23:00
Domestic Patent References:
JP2196832A
Attorney, Agent or Firm:
Naozumi Ono
Sachiko Okunuki