Title:
HERMETICALLY SEALING FILM FOR METAL CONTAINER
Document Type and Number:
Japanese Patent JP2643785
Kind Code:
B2
Abstract:
PURPOSE: To enable the high frequency welding to a metal container, to keep strong seal strength and hermetical sealability and to prevent the release from an aluminum foil layer by laminating a polyester hot-melt layer to the aluminum foil layer as a high frequency welding layer through a polyethylene terephthalate layer.
CONSTITUTION: A hermetically sealing film for a metal container is formed by laminating a high frequency welding layer to an aluminum layer and welded to the opening part of the metal container through the high frequency welding layer by a high frequency induction heating system to hermetically seal the opening part of the metal container. Herein, the thickness of the aluminum foil layer 11 is pref. 7-40μm and a polyethylene terephthalate layer 13 is pref. laminated to the aluminum foil layer 11 in a thickness of 5-40μm and a polyester hot-melt layer 12 is laminated to the layer 13 pref. in a thickness of 5-40μm as the high frequency welding layer. Since hot-melt polyester having a low m.p. and having a large number of polar groups in its molecule is used in the high frequency welding layer, strong seal strength and hermetical sealability can be kept.
Inventors:
KATAGIRI ISAMU
YAMAMOTO WATARU
YAMAMOTO WATARU
Application Number:
JP21436893A
Publication Date:
August 20, 1997
Filing Date:
August 30, 1993
Export Citation:
Assignee:
KAO KK
TOTSUPAN INSATSU KK
TOTSUPAN INSATSU KK
International Classes:
B29C65/36; B32B15/08; B32B15/085; B32B15/09; B65D77/20; (IPC1-7): B32B15/08; B32B15/08; B65D77/20
Domestic Patent References:
| JP58166039A | ||||
| JP5578430U | ||||
| JP57136738U |
Attorney, Agent or Firm:
Osamu Hatori
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