Forming shaped articles from orientable polymers and polymer mic

Plastic and nonmetallic article shaping or treating: processes – Pore forming in situ – Composite article making

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Details

264537, 264540, 2642106, 2642107, 2642108, 264211, 2642888, 2642902, 2642905, 264DIG7, 264DIG47, B29C 6724

Patent

active

051416859

ABSTRACT:
The present invention relates to a method of forming shaped articles having a continuous phase of an oriented thermoplastic polymer containing cross-linked polymer microbeads at least partially bordered by void space. The thermoplastic polymer in molten form is mixed with a plurality of the crosslinked polymer microbeads, and the mixture is then formed into a shaped article. The article is stretched in at least one direction to orient it. The orienting conditions and the character and quantity of crosslinked polymer microbeads is effective to form voids in the article at least bordering the microbeads on sides thereof in the direction(s) of orientation.

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