Method of producing laminated packaging material

Details Method of producing laminated packaging material Method of producing laminated packaging material

1995-06-06

1998-09-08

Nakarani, D. S.

Stock material or miscellaneous articles

Web or sheet containing structurally defined element or...

Physical dimension specified

15624411, 15624412, 15624413, 428 352, 428336, 428349, 428448, 428451, B29D 900, B32B 900, B65D 6540, B65D 8124

Patent

active

058043004

ABSTRACT:
In the production of a laminated packaging material formed of a laminate comprising a base film, a silicon oxide layer and a sealing medium layer, the sealing medium layer is formed by laminating a thermoplastic resin to the silicon oxide layer by extrusion coating in a thickness of 30 .mu.m or less. At this time, in addition to the thermoplastic resin layer formed by extrusion coating, an additional thermoplastic resin film may be laminated to its outside so that they are put together to form a layer serving as the sealing medium layer. In this case, lamination is carried out to extrude a thermoplastic resin between the silicon oxide layer and the thermoplastic resin film in a layer thickness of 30 .mu.m or less. In a lengthwise pillow type laminated packaging material formed of a laminate comprising a sealing medium layer, a base film and a silicon oxide layer, a thermoplastic resin layer and an outer substrate are further laminated outside the silicon oxide layer at the same time the thermoplastic resin layer is formed, by extruding a thermoplastic resin between the outer substrate and the silicon oxide layer.

REFERENCES:
patent: 5232755 (1993-08-01), Komiya et al.
AN 90-088394, Database WPI, Week 9012, Derwent Publications Ltd., London, England. Feb. 13, 1990.
AN 91-121873, Database WPI, Week 9117, Derwent Publications Ltd., london, England. Mar. 18, 1991.
"Wrapping Material Having Gas Barrier Property", M. Michihiro et al., Patent Abstracts of Japan, JP-3-061530 (Toppan Printing Co., Ltd.), Mar. 3, 1991.
English translation of International Search Report Oct. 25, 1993.

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