Ube Industries, Inc.

Ryo Sakimoto

Kenji Kawabata

Toru Kidosaki

Shoichi Yamaoka

Hiroki Nagumo

Takuya Shimofusa

Taiga Adachi

Hidenobu Kuwahara

A resin granule mass including a plurality of resin granules, and a proportion of resin granules to which a magnetic foreign matter of 50 &#x3bc;m or greater is adhered in the plurality of resin granules is 30% or less.

Sorting method

A polyolefin micro porous film includes at least one of polyethylene and polypropylene, in which the compressive elastic modulus is 95 MPa or more and 150 MPa or less, the surface roughness (Ra) of a film surface is measured for a front surface and a rear surface, and the average value (Ra(ave)) thereof is 0.01 &#x3bc;m to 0.30 &#x3bc;m.

Polyolefin micro porous film, separator film for power-storage device, and power-storage device

A polyolefin micro-porous film containing a polypropylene resin, in which a meltdown temperature of the polyolefin micro-porous film is 195&#xb0; C. to 230&#xb0; C. A weight-average molecular weight of the polypropylene resin is 500,000 to 800,000. Furthermore, a molecular weight distribution of the polypropylene resin is 7.5 to 16.

Polyolefin micro-porous film, separator film for power-storage device, and power-storage device

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Sodegaura, Japan

Ryo Sakimoto