Laminated polyester film

Details Laminated polyester film Laminated polyester film

1998-09-11

2000-10-24

Copenheaver, Blaine

Stock material or miscellaneous articles

Structurally defined web or sheet

Including components having same physical characteristic in...

428215, 428218, 4283148, 4283193, 428910, B32B 326

Patent

active

061364207

ABSTRACT:
A laminated polyester film is disclosed which contains not more than 0.05% by weight of a fluorescent agent. The film comprises a fine cell-containing polyester film that contains 55 to 95% by weight of polyester and 5 to 45% by weight of an immiscible thermoplastic resin, said fine cell-containing polyester film having a density of 0.40 to 1.30 g/cm.sup.3 and at lest one other polyester. The other polyester film is laminated as an outermost layer on at least one of the surfaces of the fine cell-containing polyester film. It has a density of not less than 0.40 g/cm.sup.3 and not less than 0.01% by weight of a fluorescent whitening agent. The concentration of the fluorescent whitening agent in the other polyester film is higher than that in the fine cell-containing polyester film.

REFERENCES:
patent: 4871784 (1989-10-01), Otonari et al.
patent: 5045384 (1991-09-01), Otonari et al.
Derwent Publications Ltd., Abstract No.92-277119 (1991), no month.
Derwent Publications Ltd., Abstract No.91-159224 (1991), no month.

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