B - Operations – Transporting – 01 – D
Patent
B - Operations, Transporting
01
D
B01D 67/00 (2006.01) B01D 5/00 (2006.01) B01D 71/26 (2006.01) B29C 39/14 (2006.01) B29C 41/02 (2006.01) B29C 47/88 (2006.01) C08J 9/28 (2006.01)
Patent
CA 2422261
A method and apparatus for producing microporous films. The method utilizes a casting surface (14) and a condensing surface (18). The condensing surface (18) is spaced from the casting surface (14) to form a gap. The distance between the surfaces forming the gap is relatively small and is preferably less than 3 cm. A material, capable of forming microporous films through thermally induced phase separation processes, is cast onto the casting surface (14), preferably through conventional extrusion practices. The material contains at least one evaporative component that generally flashes off upon formation of the microporous material and condenses on the condensing surface (14).
L'invention concerne un procédé et un dispositif de fabrication de pellicules microporeuses. Ledit procédé fait intervenir une surface de coulage et une surface de condensation. La surface de condensation est espacée de la surface de coulage de manière à former un écart. La distance entre les surfaces formant l'écart est relativement faible et de préférence inférieure à 3 cm. Un matériau pouvant former des pellicules microporeuses par l'intermédiaire de processus de séparation de phase thermiques est coulé sur la surface de coulage, de préférence au moyen de techniques d'extrusion habituelles. Ce matériau contient au moins un composant évaporatif s'évaporant habituellement dès formation du matériau microporeux, et se condensant sur la surface de condensation.
Hughes Shannon K.
Kolb William B.
Yapel Robert A.
3m Innovative Properties Company
Smart & Biggar
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