Process for the production of blow molded articles accompanied w

Details Process for the production of blow molded articles accompanied w Process for the production of blow molded articles accompanied w

1981-04-30

1983-07-19

Silbaugh, Jan H.

Plastic and nonmetallic article shaping or treating: processes

Recycling of reclaimed or purified process material

Of gaseous process material

264 83, 264523, 264526, 264540, 425 72R, 425535, B29C 1707, B29C 2500

Patent

active

043943330

ABSTRACT:
In a blow molding process in which a parison is blown with a blowing gas containing a reactive gas component capable of reacting with the inner walls of the parison, the blowing gas is removed from the resulting blown article with a purging gas and stored for reuse. The mixture of blowing and purging gases in a reserve tank or other suitable means is adjusted to a certain level of pressure and reactive gas concentration and then recycled as the blowing gas in a subsequent blow molding step. The resulting blown articles from this process have improved properties, e.g. improved impermeability against non-polar solvents when fluorine is the reactive gas.

REFERENCES:
patent: 3065501 (1962-11-01), Gasmire
patent: 3789093 (1974-01-01), Bose
patent: 3862284 (1975-01-01), Dixon et al.
patent: 4126657 (1978-11-01), Gado

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