Title:
HEAT-SEALABLE CAP FOR POLYESTER VESSEL AND VESSELS CAPPED WITH SAME
Document Type and Number:
WIPO Patent Application WO/1990/003886
Kind Code:
A1
Abstract:
A method for heat sealing between a thermoplastic polyester vessel and a cap and heat-sealed vessels capable of resisting hot water treatment such as retort sterilization are disclosed. The heat-sealable cap to be used comprises a laminate of a heat-sealing layer containing as a major component a copolymer polyester resin having a softening point of 120�C or above and a glass transition temperature of 30 to 85�C, a metallic material, and an epoxy-phenol resin primer layer provided therebetween. The vessel to be used preferably has a heat-sealable portion comprising a thermoplastic polyester having a melting temperature of 200�C or above in a crystalline state and being oriented to crystallize or thermally crystallized.
Inventors:
SUZUKI KOUJI (JP)
IMATANI TSUNEO (JP)
KURASHIMA HIDEO (JP)
TAIRA KAZUO (JP)
IMATANI TSUNEO (JP)
KURASHIMA HIDEO (JP)
TAIRA KAZUO (JP)
Application Number:
PCT/JP1989/001047
Publication Date:
April 19, 1990
Filing Date:
October 12, 1989
Export Citation:
Assignee:
TOYO SEIKAN KAISHA LTD (JP)
International Classes:
B32B15/08; B65D17/40; B65D77/20; (IPC1-7): B32B15/08; B65D53/00; B65D65/40; B65D77/20
Foreign References:
| JPS6210188B2 | 1987-03-04 | |||
| JPS627480Y2 | 1987-02-20 | |||
| JPS5841368U | 1983-03-18 | |||
| JPS6228764U | 1987-02-21 |
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