Stretched polychlorotrifluoroethylene film, process for the prod

Details Stretched polychlorotrifluoroethylene film, process for the prod Stretched polychlorotrifluoroethylene film, process for the prod

1997-06-02

1998-11-10

Thibodeau, Paul J.

Special receptacle or package

With specified material for container or content

For content inhibitor or stabilizer

206418, 206528, 2065241, 2065246, 428 352, 428 354, 428 355, 428 366, 428910, 428917, 526242, 526249, 2642902, 264345, B65B 8542, A61J 100, C08F 1400

Patent

active

058330704

ABSTRACT:
A stretched PCTFE (polychlorotrifluoroethylene) film is provided with a good moisture-proofness (low moisture permeability) even at a relatively small thickness and at a small crystallinity The film is characterized by a crystallinity A (%) of 15-75% and a moisture permeability B (mg/m.sup.2.day) at a film thickness of 20 .mu.m, satisfying a relationship of B/(100-A).ltoreq.3.0. The film may suitably be produced through a process characterized by a sequence of a relatively low-temperature melt-extrusion and a low temperature stretching. The film is suitably used for constituting moisture-proof packaged products, such as an EL device or a packaged drug product.

REFERENCES:
Database WPI, Section Ch, Week 9334, Derwent Publications LTd., London, GB; Class A14, AN 93-269495, 1993.
Database WPI, Section Ch, Week 9328, Derwent Publications Ltd., London, GB; Clas A14, AN 93-223875, 1993.
Database WPI, Section Ch, Week 9243, Derwent Publications Ltd., London, GB; Class A14, AN 92-353378, 1992.
"Nitto Giho", vol. 25, No. 1 (1987).

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