Thin film multilayer structure as permeation barrier on plastic

Details Thin film multilayer structure as permeation barrier on plastic Thin film multilayer structure as permeation barrier on plastic

1993-03-02

1995-10-31

Thibodeau, Paul J.

Stock material or miscellaneous articles

Hollow or container type article

Glass, ceramic, or sintered, fused, fired, or calcined metal...

428 354, 428 366, 428216, 428335, 428430, 428446, 428451, 428480, 428697, 4272553, 4274192, 427527, 427579, 427588, 427595, B32B 1800, B32B 2706, B32B 2736, B32B 702

Patent

active

054627796

ABSTRACT:
A barrier coating against oxygen and water vapor penetration for a plastic packaging film comprising two oxides, one of which is SiO.sub.2 while the other is Al.sub.2 O.sub.3. The barrier is a single layer of mixed oxides in which the concentration of Al.sub.2 O.sub.3 increases continuously from 20% by weight to 80% by weight while the concentration of SiO.sub.2 decreases continuously from 80% by weight to 20% by weight as the thickness of the mixed oxide layer increases from the surface of the plastic film. The plastic film is preferably polyethylene terephthalate or polyphenylene oxide and the barrier coating is transparent.

REFERENCES:
patent: 3442686 (1969-05-01), Jones
patent: 4552791 (1985-11-01), Hahn
patent: 4702963 (1987-10-01), Phillips et al.
patent: 5085904 (1992-02-01), Deak et al.
patent: 5100720 (1992-03-01), Sawada et al.
patent: 5107791 (1992-04-01), Hirokawa et al.

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