Process for the production of hollow bodies from...

B - Operations – Transporting – 29 – C

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B29C 49/46 (2006.01) C08J 7/12 (2006.01) B29C 49/04 (2006.01)

Patent

CA 2138226

In a process for the production of a hollow body such as a fuel tank from thermoplastic material, the wall thereof is subjected to a two-step treatment to influence the permeation properties of the material. In the first treatment step the wall is subjected to the action of a gas mixture containing fluorine and oxygen while in the second treatment step the wall is subjected to the action of a gas mixture which contains fluorine but is oxygen-free.

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