Method for increasing barrier properties of thermoplastic substr

Details Method for increasing barrier properties of thermoplastic substr Method for increasing barrier properties of thermoplastic substr

1987-07-22

1988-08-16

Kittle, John E.

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Hollow or container type article

Cellular material derived from plant or animal source

264 83, 427230, 427322, 428412, 4284242, 428483, 428516, 428518, 428421, B29C 4946, B05D 300, B65D 2302

Patent

active

047644052

ABSTRACT:
The present invention is a method for improving the barrier properties of thermoplastic substrates. A surface of the thermoplastic substrate is contacted with a reactive gas stream having an F.sub.2 concentration greater than or equivalent to 0.0001 atm. partial pressure of F.sub.2 per atm. total pressure and sufficient oxygen such that the F.sub.2 /O.sub.2 ratio is less than or equal to about 100, with the remainder being additional reactive and/or non-reactive components. A barrier coating material is applied to the treated surface of the substrate and subsequently undergoes a curing step to form the final product.

REFERENCES:
patent: 3702258 (1972-11-01), Gibbons
patent: 3862284 (1975-01-01), Dixon
patent: 4009304 (1977-02-01), Dixon et al.
patent: 4247577 (1981-01-01), Imada et al.
patent: 4372986 (1983-02-01), Imada et al.
patent: 4422991 (1983-12-01), Phillips
patent: 4515836 (1985-05-01), Cobbs et al.
patent: 4550043 (1985-10-01), Bock

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