EASILY OPENABLE CONTAINER

Japanese Patent JP3885278

B2

PROBLEM TO BE SOLVED: To keep an excellent sealing function even at the time of a high temperature heat treatment such as a retort sterilization, and at the same time, stably and surely keep an easy releasability regardless of the history for heat treatments by a method wherein at least one of laminated bodies constituting at least an unsealing starting part of a container, is equipped with an intermediate layer of a specified blended substance.
SOLUTION: For this container, laminated bodies for which a propylene based polymer is made internal surface members 3, 4, are heat-sealed 6 which each other. At least one 1 of the laminated bodies constituting at least an unsealing starting part of the container is equipped with an intermediate layer 5 of a blended substance containing a propylene based polymer and a cyclic olefin based polymer of which the glass transition point is 70°C or higher, by a weight ratio of (90:10)-(40:60) under a positional relationship to be adjacent with the internal surface member layer 3 of the polypropylene based polymer. Therefore, the polypropylene based polymer internal surface layers 3, 4 of confronted laminated bodies 1, 2 form tight seals of which the release forces from each other are large, and the blended substance constituting the intermediate layer 5 of one 1 of the laminated bodies becomes a peelable layer.

Yasuhiro Oda
Yasushi Hatano
Koji Suzuki
Maruhashi Yoshitsugu
Ishii Shigeru
Keiji Fukue

JP9944497A

February 21, 2007

April 16, 1997

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Toyo Seikan Co., Ltd.

B65D30/02; B32B1/02; B65D75/60; B32B27/32; B65D77/20; B65D81/24; (IPC1-7): B65D75/60; B32B1/02; B32B27/32; B65D30/02; B65D77/20; B65D81/24

JP9058649A
JP8072210A
JP8332701A
JP9011416A

Naozumi Ono
Sachiko Okunuki

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