Plastic article or earthenware shaping or treating: apparatus – With means applying coating material to work or work contact...
Patent
1988-08-29
1989-08-29
Chiesa, Richard L.
Plastic article or earthenware shaping or treating: apparatus
With means applying coating material to work or work contact...
264 83, 425 96, 425522, 425542, 425546, 427237, B29C 4517, B29C 4942
Patent
active
048612502
ABSTRACT:
An in-mold sulfonation system for sulfonating the surface of plastic articles such as plastic containers during molding. Sulfur trioxide is introduced into a pre-mold chamber, converted to a relatively high pressure gaseous sulfur trioxide, and then injected into a mold such as a blow mold immediately before or immediately following full expansion of the formed plastic article in the mold cavity. Neutralization with a gaseous neutralizing agent follows. By controlling the timing and temperature of the in-mold sulfonation step it is possible to produce a plastic article having an effective barrier layer but containing a minimum of undesirable rinseable salts.
REFERENCES:
patent: Re28497 (1975-07-01), Gasmire
patent: 2811468 (1957-10-01), Joffre
patent: 3613957 (1971-10-01), Walles
patent: 3617338 (1971-11-01), Caiola et al.
patent: 3694424 (1972-09-01), Hunkar et al.
patent: 3740258 (1973-06-01), Walles
patent: 3862284 (1975-01-01), Dixon et al.
patent: 4220739 (1980-09-01), Walles
patent: 4336015 (1982-06-01), Rainville
patent: 4394333 (1983-07-01), Fukushima et al.
patent: 4396567 (1983-08-01), Rainville
patent: 4615914 (1986-10-01), Walles
patent: 4701290 (1987-10-01), Eschwey et al.
patent: 4743419 (1988-05-01), Bierschenk
patent: 4752428 (1988-06-01), Williams et al.
Tomkinson Donald L.
Walles Wilhem E.
Chiesa Richard L.
Kanuch Bruce M.
The Dow Chemical Company
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