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US 10,427,904 B2Granted
Method for producing film and method for winding off film
AssigneeSumitomo Chemical Company, Limited
InventorsJian Wang, Tatsuya Kataoka, Hideyuki Hamamura
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Abstract
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.
Claims5
A method for producing a film, said method comprising the steps of:
- taking up a film by a first step of winding the film on an outer peripheral surface of a core while oscillating the core in a rotation axis direction, such that the film is in a state of being distorted in a wavelike manner in the rotation axis direction;
- and
- a second step of winding off the film, which has been taken up in the taking up step and which is in the state of being distorted in the wavelike manner in the rotation axis direction, from the core,
- wherein in the second winding off step, the core is oscillated in the rotation axis direction and in the second winding off step, oscillation of the core is controlled so that distortion of the film which has been wound off becomes smaller.
1 more element
Dependencies are inferred from the claim text.