Sumitomo Chemical Company, Limited

Satoshi Yoneyama

Daizaburo Yashiki

Takahiro Matsuo

Jian Wang

Yasutoshi Minemoto

Takeshi Kawakami

A wagon () includes a plurality of horizontal support bars (). A separator roll () is stocked while the horizontal support bar is inserted into a core of the separator roll () around which core a separator is rolled. This can prevent deformation and roll misalignment of the stocked separator roll.

Method for stocking battery separator roll, method for producing same, method for carrying same, and carrier for same

A method for producing a porous film having a water content percentage of less than 1000 ppm, the method including the steps of: (1) obtaining a porous film (A) having a water content percentage of not less than 1000 ppm; (2) obtaining a package by causing the obtained porous film (A) and a drying agent to be contained in a water vapor barrier packaging container and sealing the water vapor barrier packaging container; and (3) storing the obtained package.

Package of porous film

Provided is a nonaqueous electrolyte secondary battery separator excellent in voltage-withstanding property. This nonaqueous electrolyte secondary battery separator has (i) a film thickness of not more than 20 &#x3bc;m, (ii) a peeling strength, measured by a blocking test, of not less than 0.2 N, and (iii) a puncture strength that changes through the blocking test by not more than 15%. The blocking test is carried out by (i) sandwiching, by a jig of 100 mm&#xd7;100 mm, two 80 mm&#xd7;80 mm pieces of a separator, (ii) allowing the two 80 mm&#xd7;80 mm pieces to rest for 30 minutes under a load of 3.5 kg at a temperature of 133&#xb0; C.&#xb1;&#xb0; C., (iii) removing the load, (iv) cooling the two 80 mm&#xd7;80 mm pieces to room temperature, (vi) cutting out a specimen of 27 mm&#xd7;80 mm from the two 80 mm&#xd7;80 mm pieces, and then (vi) measuring a peeling strength of the specimen at 100 mm/min.

Nonaqueous electrolyte secondary battery separator and use thereof

Method for producing porous film

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.

Laminated porous film, separator for non-aqueous electrolyte secondary battery and non-aqueous electrolyte secondary battery

The present invention provides a long separator roll. A method according to the present invention for producing a battery separator roll includes a connecting step of connecting two or more separators (and) to each other along a lengthwise direction so that the battery separator roll is produced.

Growing community of inventors

Niihama, Japan

Satoshi Yoneyama