Plastic and nonmetallic article shaping or treating: processes – Pore forming in situ – Composite article making
Patent
1990-12-11
1992-08-25
Thurlow, Jeffery
Plastic and nonmetallic article shaping or treating: processes
Pore forming in situ
Composite article making
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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Lee Jong S.
Maier Larry K.
Priebe Elizabeth K.
Smith Glenn C.
Woodgate Paul E.
Eastman Kodak Company
Gerlach Robert A.
Goldman Michael L.
Stevens John F.
Thurlow Jeffery
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