Plastic and nonmetallic article shaping or treating: processes – Reactive gas or vapor treatment of work – Work is organic material
Patent
1986-11-07
1988-05-10
Thurlow, Jeffery
Plastic and nonmetallic article shaping or treating: processes
Reactive gas or vapor treatment of work
Work is organic material
34 12, 34 36, 34 37, 34114, 34115, 34122, 118718, 118720, 118721, 118729, 118730, 264101, 26421113, 264340, 425 73, 4272481, 4272551, 4272555, 525355, 525356, B29C 7100, C08F 820, C08F 822, C08J 700
Patent
active
047434198
ABSTRACT:
An on-line film fluorination apparatus cooperative with a continuous polymer film extruding apparatus is set forth. In the preferred and illustrated embodiment, a continuous feed film is introduced into a closed cabinet or housing having alignment and guide rollers for directing the film into the housing. The film passes around a first roller having a portion thereof formed of sintered nickel to enable gaseous impregnation of the surface of the film with a gas flow including fluorine. The gas acts on the exposed face of the film, changing the surface of the polymer film, thereby providing a relatively thick surface upgrading of the film. After exposure to the fluorine, the film passes a closed vacuum container having an open face adjacent to the film surface for drawing off unreacted fluorine for recapture and recycling. This procedure can be optionally repeated on both surfaces of the film; the film that emerges from the closed cabinet or housing has a modified surface, and the cabinet or housing is evacuated with slight negative pressure.
REFERENCES:
patent: 2497046 (1950-02-01), Kropa
patent: 2811468 (1957-10-01), Joffre
patent: 3061882 (1962-11-01), Wolinski
patent: 3512265 (1970-05-01), Fleissner
patent: 3862284 (1975-01-01), Dixon et al.
patent: 4296151 (1981-10-01), Boultinghouse
Tentoni Leo B.
The Dow Chemical Company
Thurlow Jeffery
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