Sumitomo Chemical Company, Limited

Tatsuya Kataoka

Kiyomu Nomura

Koichiro Watanabe

Yusuke Kon

Masaya Kondo

Hideyuki Hamamura

Satoshi Oohira

Koji Kashu

Jian Wang

Akinobu Sakamoto

Takamasa Egawa

Yosuke Tsukuda

Genjiro Nishikata

Yuji Tanabe

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

A wrinkle caused in a separator roll is inhibited. A slitting apparatus () changes a conveying direction of a first separator () by a direction changing roller () toward a first take-up roller (U), and conveys the first separator via an assisting roller () which is provided between a take-up position of the first separator to be wound and the direction changing roller so as to shorten a conveying distance between the take-up position and a roller immediately before the take-up position.

Slitting apparatus and method for producing separator roll

To easily specify the position of a defect in a separator, a method for producing a separator original sheet () includes the steps of: forming a separator original sheet () including a separator original sheet () and a heat-resistant layer coated on the separator original sheet (); detecting a defect (D) in the separator original sheet (); and recording information including information on a position of the defect (D) which position is a position in the width direction of the separator original sheet ().

Method for manufacturing separator web, method for manufacturing separator, separator web, and apparatus for manufacturing separator web

A wrinkle or misaligned winding caused in a separator roll is inhibited. In a slitting apparatus (), a conveying direction of a first separator () is changed to a first take-up roller (U) side by a direction changing roller (), the first separator is conveyed via a take-up assisting roller () which is provided between the direction changing roller and a first touch roller (U) so as to shorten a roller-to-roller distance to the first touch roller, and the first separator which is being wound is pressed onto a take-up surface by the first touch roller.

Method for producing separator roll and device for producing separator roll

The separator production method in accordance with an embodiment of the present invention includes a coated article taking up step of taking up a separator original sheet by winding the separator original sheet on an outer peripheral surface of a core while oscillating the core in the rotation axis direction; a coated article winding off step of winding off the separator original sheet, which has been taken up in the coated article taking up step, from the core; and a transferring step of transferring the separator original sheet, which has been wound off in the coated article winding off step, such that a state of being distorted in a wavelike manner in the transverse direction is maintained.

Method for producing film

A good-quality slit separator having a small amount of fuzziness at a slit part thereof is to be obtained. The present invention includes: a step (S) of conveying an original sheet (S); and a step (S) of slitting the original sheet (S) by causing a plurality of slitting blades () to cut into the original sheet (S) such that tangent plane angles (&#x3b8;) in a tangent plane, on which a slitting position is in contact with the original sheet (S), are substantially identical with each other.

Method for producing slit separator and method for producing separator roll

The separator production method in accordance with an embodiment of the present invention includes a coated article winding off step of winding off, from a core, a separator original sheet which has been taken up in a coated article taking up step of winding the separator original sheet on an outer peripheral surface of the core while oscillating the core in a rotation axis direction, and the core is oscillated in the rotation axis direction in the coated article winding off step.

Method for producing film and method for winding off film

A defect of a film is accurately inspected. A film inspection device includes: a light-receiving device generating a signal by receiving light which returns via a film after having been applied to the film, the signal being for detecting a defect included in the film; and a reflecting roller carrying the film while supporting the film from a side opposite to the light-receiving device in a field of view of the light-receiving device.

Film inspection device, film inspection method, and film production method

Provided is a method for producing a separator which method less causes a tear in the separator. The method is a method for producing a separator by slitting, in a direction in which a separator original sheet () being porous is conveyed, the separator original sheet () into a plurality of separators (), including the steps of: (a) conveying the separator original sheet () in a state where the separator original sheet () is in contact with a roller (); and (b) slitting the separator original sheet () at a portion where the separator original sheet () is in contact with the roller ().

Method for producing separator and method for slitting separator original sheet

Device and method for producing separator roll

Method for producing separator and method for slitting

A good-quality slit separator having a small amount of fuzziness at a slit part thereof is to be obtained. The present invention includes: a step (S) of conveying an original sheet (S); and a step (S) of slitting the original sheet (S) by causing a slitting blade () to cut into the original sheet (S) such that a d tangent plane angle (&#x3b8;) in a tangent plane, on which a slitting position is in contact with the original sheet (S), is in a range of not less than 3&#xb0; to not more than 35&#xb0;.

Growing community of inventors

Niihama, Japan

Tatsuya Kataoka