Composite deposited film and production process thereof

Details Composite deposited film and production process thereof Composite deposited film and production process thereof

1995-07-13

1998-01-20

Dye, Rena

Stock material or miscellaneous articles

Composite

Of quartz or glass

428 347, 428 359, 428435, 428441, 428442, 428458, 428461, 428463, 428532, B32B 1708, B32B 2300

Patent

active

057099510

ABSTRACT:
A composite deposited film including (A) a polymeric film substrate; (B) a deposit of an inorganic material formed on at least one side of the polymeric film substrate (A); and (C) a water-resistant film laminated on the deposit (B) and formed from a mixture containing a polycarboxylic acid or a partially neutralized product thereof and a saccharide in a weight ratio of 95:5 to 20:80 is provided. A production process of a composite deposited film, which includes the steps of forming a deposit (B) of an inorganic material on at least one side of a polymeric film substrate (A); casting a solution of a mixture containing a polycarboxylic acid or a partially neutralized product thereof and a saccharide in a weight ratio of 95:5 to 20:80 on the deposit (B); drying the mixture to form a film; and then subjecting the resultant dry film to a heat treatment at a temperature not lower than 100.degree. C. (373 K), thereby forming a water-resistant film (C) on the deposit (B), is also provided.

REFERENCES:
patent: 4919984 (1990-04-01), Maruhashi et al.
patent: 5153038 (1992-10-01), Koyama et al.
patent: 5221790 (1993-06-01), Besnard et al.
patent: 5498662 (1996-03-01), Tanaka et al.
patent: 5545485 (1996-08-01), Hashitani et al.
patent: 5580624 (1996-12-01), Andersen et al.
"Testing Method for Vicat Softening Temperature of Thermoplastics," Japanese Industrial Standard, by Japanese Standards Association, 1991.
"Testing Methods for Determination of the Water Vapour Transmission Rate of Moisture-Proof Packaging Materials (Dish Method)," Japanese Industrial Standard, by Japanese Standards Association, 1976.
Database WPI, week 8129, Derwent Publications Ltd., London, GB, AN 81-52273D and JP-A-56 062 832 (Suzuki S.) abstract.

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