Plastic and nonmetallic article shaping or treating: processes – Removal of liquid component or carrier through porous mold... – By direct application of vacuum or pneumatic pressure
Patent
1992-03-17
1994-10-25
Woo, Jay H.
Plastic and nonmetallic article shaping or treating: processes
Removal of liquid component or carrier through porous mold...
By direct application of vacuum or pneumatic pressure
264120, 264126, 264129, 264185, 264299, 264547, 264553, B29B 1112, B29C 4314, B29C 4356
Patent
active
053586778
ABSTRACT:
Method for forming polyvinyl alcohol (PVA) into surgical elements include forming a mixture of PVA and water into a film by vacuum pressing with a first force, heating, applying a second force two to two hundred times the firs force, drying the film to remove water to a content of less than about 10% by weight based on the weight of the film, and molding the film into a desired shape.
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D'Alessio Keith
Muth Ross R.
Totakura Nagabhushanam
Smith Duane S.
United States Surgical Corporation
Woo Jay H.
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