C - Chemistry – Metallurgy – 08 – J
Patent
C - Chemistry, Metallurgy
08
J
C08J 7/02 (2006.01) C08J 3/18 (2006.01) C08J 5/00 (2006.01) C08J 5/18 (2006.01)
Patent
CA 2196550
A method of forming a useful molded part or film of polyvinyl alcohol. The polyvinyl alcohol, together with a plasticizer is injection or blow molded to form the useful molded part or melt processed (blown or cast extrusion) to form the film wherein upon forming the useful molded part or film, the plasticizer is substantially removed to create the useful molded part or film which is selectively hot water soluble and which is resistant to the affects of moisture below the solubility temperature.
L'invention concerne un procédé de formation d'un film ou d'une pièce moulée consituée d'alcool polyvinylique. L'alcool polyvinylique mélangé à un plastifiant est moulé par soufflage ou injection pour former la pièce moulée utile ou traité à l'état fondu (soufflé ou extrudé) pour former le film, après quoi le plastifiant est éliminé afin de créer le film ou pièce moulée utile qui est soluble sélectivement dans l'eau chaude et qui n'est pas affectée par l'humidité en dessous de la température de solubilité.
Honeycutt Travis W.
Khamvongsa Bryan
Lee Baosheng
Gowling Lafleur Henderson Llp
Isolyser Company Inc.
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