C - Chemistry – Metallurgy – 08 – J
Patent
C - Chemistry, Metallurgy
08
J
C08J 9/00 (2006.01) B29C 55/02 (2006.01)
Patent
CA 2602824
The microporous polyolefin film produced by drawing a gel molding containing a polyolefin and a solvent for film formation in at least a uniaxial direction, removing the solvent for film formation and once more drawing the molding at a rate of >= 3 %/sec in at least a uniaxial direction at temperature of <= polyolefin crystal dispersion temperature + 20~C is excellent in compression resistance.
L~invention concerne un film de polyoléfine microporeux qui est fabriqué en étirant un objet moulé en gel contenant une polyoléfine et un solvant pour la formation de film dans au moins une direction uniaxiale, en retirant le solvant pour la formation de film et en étirant de nouveau le moule à une vitesse >= 3 %/s dans au moins une direction uniaxiale à une température <= à la température de dispersion du cristal de polyoléfine +20 °C. Ledit film présente une excellente résistance aux compressions.
Kaimai Norimitsu
Kono Koichi
Nakamura Teiji
Takita Kotaro
Yamada Kazuhiro
Smart & Biggar
Tonen Chemical Corporation
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