Sumitomo Chemical Company, Limited

Yasutoshi Minemoto

Jian Wang

Koichiro Watanabe

Shinya Kimura

Ryutaro Shiba

Noboru Hayakawa

Yusuke Kon

Satoshi Yoneyama

Akio Sakai

Takeshi Kawakami

A separator roll in accordance with an embodiment of the present invention includes a core, a heat-resistant separator wound around the core and in contact with an outer peripheral surface thereof, and a multilayer label attached to an outer layer surface of the heat-resistant separator, the multilayer label including a first film base and a second film base detachable from the first film base.

Separator roll, method for producing separator roll, and label checking method

A film is uniformly coated with a coating solution. The following formula is satisfied:0&#x3c;&#x3c;113

Coating method, coating device, and functional film production method

A gravure roll, in which the outside peripheral surface of a metal roll main body has a plurality of oblique line shaped protrusions forming a prescribed angle with the center axis of the roll main body and the coating liquid can be held in a plurality of oblique line shaped recesses formed between each of the plurality of protrusions, is configured such that the roll main body has a diamond-like carbon layer on the entire outer peripheral surface thereof, a head part for each of the plurality of protrusions is cut down, and each of the plurality of protrusions has a trapezoidal cross-sectional shape that becomes gradually narrower in width moving in direction toward the head part. A separator with a uniform weight per unit area can be manufactured wherein the coating liquid is coated onto a base material film using this gravure roll.

Gravure roll, method of fabricating a separator, and separator

A roll member having an outer circumferential surface in which a plurality of grooves are formed, wherein the plurality of grooves are arranged at an angle relative to a direction parallel to a central axis of the roll member. A coating device for coating a film member with a coating liquid, the coating device comprising the roll member. A separator production device for producing a separator in which a heat-resistant layer is laminated over a substrate. The separator production device comprising the coating device. A secondary battery production device for producing a secondary battery comprising a positive electrode plate, a negative electrode plate, and a pair of separators that sandwich the positive electrode plate or the negative electrode plate therebetween. The secondary battery production device comprising the separator production device.

Roll member, coating device, separator production device, and secondary batter production device

Provided is a multi-layered porous film which includes a functional layer having a controlled thickness in a length-wise direction thereof and which is suitable as a separator for batteries. The multi-layered porous film includes a base film, and a functional layer containing both an inorganic filler and a binder resin, the functional layer being formed on the base film, wherein a difference between a maximum basis weight and a minimum basis weight of the multi-layered porous film in a length-wise direction thereof is equal to or smaller than 2 grams/m, the basis weight being measured every 100 meters interval. The separator fabricated by cutting a film roll comprised of a multi-layered porous film into pieces each having a given length has small lot-based fluctuation in quality, and makes it possible to fabricate a battery having a small fluctuation in quality.

Multi-layered porous film and nonaqueous-electrolyte secondary battery

A method for producing a separator in accordance with an embodiment of the present invention includes: a removing step of removing both end parts of a separator original sheet in a width direction of the separator original sheet, the separator original sheet being transferred; and a coating step of coating, with coating for forming a heat-resistant layer, the separator original sheet whose both end parts have been removed in the removing step.

Method for producing separator and device for producing separator

An object of the present invention is to provide a laminated porous film excellent in handling ability. A laminated porous film having a layer containing a polymer other than a polyolefin laminated on at least one surface of a polyolefin porous film, wherein the uplift quantity of a side perpendicular to the machine direction, when allowed to stand still for 1 hour under an environment of a temperature of 23&#xb0; C. and a humidity of 50%, is 15 mm or less.

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Niihama, Japan

Yasutoshi Minemoto