Producing thermoplastic articles, particularly with porous...

Details Producing thermoplastic articles, particularly with porous... Producing thermoplastic articles, particularly with porous...

B - Operations, Transporting

29

C

18/935

B29C 55/24 (2006.01) B29C 53/30 (2006.01) B29C 55/00 (2006.01)

Patent

CA 1198864

PRODUCING THERMOPLASTIC ARTICLES PARTICULARY WITH POROUS WALLS ABSTRACT An article is molded from a thermoplastic material matrix having a particulate filler distributed throughout the matrix. The article is then expanded to develop fissures between the thermoplastic matrix material and particles of the filler material, so as to render the article porous. Apparatus for expanding a pipe from the inside or expanding the sides of corrugations in a pipe are also disclosed.

422058

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