Plastic and nonmetallic article shaping or treating: processes – Mechanical shaping or molding to form or reform shaped article – Reshaping running or indefinite-length work
Patent
1989-07-31
1991-10-01
Woo, Jay H.
Plastic and nonmetallic article shaping or treating: processes
Mechanical shaping or molding to form or reform shaped article
Reshaping running or indefinite-length work
264292, 264346, 264DIG73, 425371, 425DIG53, B29C 5516, B29C 5518
Patent
active
050531808
ABSTRACT:
A process for biaxially orienting amorphous polymers such as polymethyl methacrylate. The process includes steps of biaxially orienting a feedstock material in a deformation zone; reducing temperature of the material in a cooling zone; and annealing the material in an annealing zone. The process and apparatus produce a biaxially oriented material having enhanced optical quality and impact strength.
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Humphries Darral V.
Milsom John H.
Wang Paul T.
Aluminum Company of America
Klepac Glenn E.
Nguyen Khanh P.
Woo Jay H.
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