Process and apparatus for producing blow molded...

Details Process and apparatus for producing blow molded... Process and apparatus for producing blow molded...

B - Operations, Transporting

29

C

18/509

B29C 65/00 (2006.01) B29C 49/46 (2006.01) B29C 49/60 (2006.01) B29C 49/04 (2006.01)

Patent

CA 1181208

ABSTRACT Weld seams of parisons formed in an inert atmosphere during extrusion followed by blow molding with a blowing gas containing an oxidizing agent are extremely strong when compared with conventional seams formed in the presence of air. By sealing in an inert atmosphere and subsequently blowing the parison with a mixture of nitrogen and fluorine, a container is produced having both high weld seam strength and high levels of impermeability to non-polar hydrocarbons.

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