Sumitomo Chemical Company, Limited

Akinobu Sakamoto

Tatsuhiro Nagamatsu

Tatsuya Kataoka

Tadashi Sakurai

Yusuke Kon

Takamasa Egawa

Haruyuki Suzuki

Yosuke Tsukuda

Seiji Shiromoto

Sakae Yamamoto

Shigehumi Takuno

Kouichirou Asao

Wataru Sakuma

A nonaqueous electrolyte secondary battery separator film transfer device is provided which realizes a foreign object removing technique that is less likely to cause defects in a separator. The device includes a magnet bar which is arranged in a transfer path and generates a magnetic field for removing, from a separator film being transferred, a magnetic substance adhering to a first surface of the separator film; and an air cylinder which allows a distance to the magnet bar from the first surface of the separator film to be variable.

Separator film conveyance device for nonaqueous electrolytic-solution secondary battery and method for manufacturing separator film for nonaqueous electrolytic-solution secondary battery

In order to provide a film roll that includes a core having improved rigidity without increasing a cost, the present invention provides a film roll including: a cylindrical core; and a film wound around an outer peripheral surface of the core, the core satisfying the following inequality: D&#xd7;0.0017+0.50&#x3c;T1/T2&#x3c;D&#xd7;0.0017+0.95, wherein D (mm) denotes a difference between an outer diameter of the core and an inner diameter of the core, T1 (mm) denotes a thickness of an outer peripheral part, and T2 (mm) denotes a thickness of an inner peripheral part.

Film roll and method for producing film roll

A method accurately determines internal stress in a film roll and prevents defects in the film roll. A film winding device includes a take-up roller and a winding tension adjustment device. A calculation device uses a winding equation in which a winding tension function is explicitly expressed, the winding tension function expressing a winding tension as a function of a radius of a core. The winding tension adjustment device controls winding tension in accordance with a winding tension distribution function calculated by the calculation device.

Film winding device control method, film roll, film winding device, and film roll production method

The invention provides, as a method for producing a multi-layer foamed sheet whose scale-like appearance has been improved by means of a multi-layer circular die coextrusion method, a method for producing a multi-layer foamed sheet having foam layers and non-foam layers by a multi-layer circular die coextrusion method which is a method for producing a multi-layer foamed sheet wherein the shear stress at the interface of each layer is 5000 Pa or higher and not higher than 50000 Pa, a method for producing a multi-layer foamed sheet wherein the resin of said non-foam layer is a linear propylenic resin having a melt flow rate of 5 to 30 g/10 minutes, and a method for producing a multi-layer foamed sheet wherein the resin of said foam layer is a propylenic resin whose melt tension (MT) at 190&#xb0; C. and melt flow rate (MFR) at 230&#xb0; C. satisfy the following equation A:&#x2267;7.52&#xd7;(&#x2212;0.576)&#x2003;&#x2003;[Equation A]

Methods for producing multi-layer foamed sheets

Container comprising foamed olefin resin and process for producing same

Process for producing uncrosslinked polypropylene-based resin foam sheets and uncrosslinked polypropylene-based resin foam sheets

Laminated sheet

The present invention relates to a polypropylene resin composition containing about 90 to 60 parts by weight of a polypropylene block copolymer (A); and about 10 to 40 parts by weight of a polyethylene resin (B), wherein the polypropylene block copolymer is a polypropylene block copolymer which contains about 99 to 90% by weight of a crystalline polypropylene (a) and about 1 to 10% by weight of an amorphous ethylene-.alpha.-olefin copolymer (b) and has a melt flow rate (MFR) of about 2 to 15 g/10 minutes, and a die swell ratio, measured by a capillary rheometer, of at least 1.7. Foamed materials containing a fine and uniform foam are obtainable from this composition.

Polypropylene resin composition, polypropylene resin foamed material and

Growing community of inventors

Niihama, Japan

Akinobu Sakamoto