Microporous polyolefin membrane and method for producing the...

Details Microporous polyolefin membrane and method for producing the... Microporous polyolefin membrane and method for producing the...

C - Chemistry, Metallurgy

08

J

C08J 9/00 (2006.01) B29C 55/02 (2006.01)

Patent

CA 2602827

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, performing thermofixing treatment, removing the solvent for film formation and once more drawing the molding in at least a uniaxial direction has large pore diameter and excels in air permeability, mechanical strength and compression resistance.

L'invention se rapporte à un film polyoléfinique microporeux produit en tirant un gel de moulage contenant une polyoléfine et un solvant pour la formation d'un film au moins dans la direction uni-axiale, en effectuant un traitement de thermofixage, en retirant le solvant pour la formation d'un film et en tirant une fois de plus le moulage dans une direction au moins uni-axiale. Le film polyoléfinique microporeux ainsi obtenu possède des diamètres de pores larges et présente une excellente perméabilité à l'air, une force mécanique et une résistance à la compression excellentes.

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