MICROPOROUS FILM

WIPO Patent Application WO/2018/181579

A1

[Problem] To improve the qualities of a microporous film formed of a polyvinylidene fluoride-based resin. [Solution] A polyvinylidene fluoride-based microporous film comprising a base film and a microporous film, said microporous film being an asymmetric film and comprising a skin layer, in which micropores are formed, and a support layer for supporting the skin layer, in which pores larger than the micropores are formed, wherein: the microporous film is formed of a polyvinylidene fluoride-based resin material; the skin layer has multiple spheres; multiple linear binders extend in the three-dimensional directions from each of the spheres; and the adjacent spheres are bound to each other via the linear binders so as to form a three-dimensional network structure having the spheres as cross points. The polyvinylidene fluoride-based microporous film has a number of defects (the number of colored coarse voids) of less than 20.

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MATSUMOTO RYUJI (JP)
NAGASAKO TADASHI (JP)
IWASAKI TAKAYUKI (JP)

PCT/JP2018/012974

October 04, 2018

March 28, 2018

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JNC CORP (JP)
JNC PETROCHEMICAL CORP (JP)

B01D71/34; B01D69/00; B01D69/10; B01D69/12; C08J9/28; B01D65/10

WO2014054658A1	2014-04-10
WO2014054658A1	2014-04-10
WO2002072248A1	2002-09-19

JP2010221218A	2010-10-07
JP2006205067A	2006-08-10
JP2015160185A	2015-09-07
JP2004016930A	2004-01-22

IZAWA Makoto (JP)

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