Process for the production of barrier layers for admixtures of p

Details Process for the production of barrier layers for admixtures of p Process for the production of barrier layers for admixtures of p

1993-04-15

1994-03-08

Timm, Catherine

Plastic and nonmetallic article shaping or treating: processes

Reactive gas or vapor treatment of work

Work is organic material

264528, 264529, B29C 4946

Patent

active

052924661

ABSTRACT:
For purposes of producing barrier layers on the surfaces of thermoplastics, the surfaces are exposed to a treatment gas containing fluorine. The barrier layers are effective against mixtures of polar or non-polar substances such as, for instance, fuels containing methanol. In order to improve the barrier effect, the cooled-off treatment gas is left to act upon the surface, whose temperature at the beginning of exposure is kept between 60.degree. C. and 250.degree. C. [140.degree. F. and 482.degree. F]

REFERENCES:
patent: 3862284 (1975-01-01), Dixon et al.
patent: 4296151 (1981-10-01), Boultinghouse
patent: 4394333 (1983-07-01), Fukushima et al.
patent: 4869859 (1989-09-01), Eschwey et al.
patent: 5244615 (1993-09-01), Hobbs

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