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US 10,513,045 B2Granted
Method for producing slit separator and method for producing separator roll
AssigneeSumitomo Chemical Company, Limited
InventorsSatoshi Oohira, Tatsuya Kataoka, Kiyomu Nomura, Masaya Kondo
Life of this patent
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Abstract
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 (S101) of conveying an original sheet (S); and a step (S102) of slitting the original sheet (S) by causing a plurality of slitting blades (72) to cut into the original sheet (S) such that tangent plane angles (θ3) in a tangent plane, on which a slitting position is in contact with the original sheet (S), are substantially identical with each other.
Claims11
A method for producing a slit separator, comprising:
- a first conveying step of conveying a battery separator original sheet which is porous;
- and
- a first slitting step of slitting the battery separator original sheet in a direction of conveyance of the battery separator original sheet by causing a plurality of slitting blades to cut into the battery separator original sheet such that a plurality of tangent-plane blade edge angles are substantially identical with each other,
- each of the plurality of tangent-plane blade edge angles being a cross-sectional angle of a corresponding one of the plurality of slitting blades, the corresponding one of the plurality of slitting blades expanding from its edge as a tip so as to have the cross-sectional angle on a plane which includes the battery separator original sheet with which the edge is in contact,
- each of the plurality of tangent-plane blade edge angles being in a range of not less than 3° and not more than 35°.
2 more elements
Dependencies are inferred from the claim text.