US 12,230,831 B2Granted

Stretching apparatus for manufacturing separator and method of manufacturing separator using the same

AssigneesW-Scope Korea Co., Ltd., W-Scope Chungju Plant Co., Ltd.

InventorsKyoung Sun Ryu, Won Keun Choi, Kwang Ho Choi, Pyung Yong Park, Byung Hyun Kim

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Abstract

One aspect of the present invention provides a stretching apparatus for manufacturing a separator including a first stretching machine and a second stretching machine arranged in parallel with each other, in which the first stretching machine includes a plurality of first unit sections having different stretching ratios, and the second stretching machine includes a plurality of second unit sections having different stretching ratios, the overall stretching ratio by each of the first stretching machine and the second stretching machine is the same each other, and at least one stretching ratio of the first unit section and at least one stretching ratio of the second unit section are different from each other and a method of manufacturing a separator using the same.

Claims11

Dependent claims

A stretching apparatus for manufacturing a separator, comprising:

a first stretching machine and a second stretching machine arranged in parallel with each other,
wherein the first stretching machine includes a plurality of first unit sections having different stretching ratios,
the second stretching machine includes a plurality of second unit sections having different stretching ratios,
an overall stretching ratio of the first stretching machine and an overall stretching ratio of the second stretching machine are the same,
at least one stretching ratio of a first unit section and at least one stretching ratio of a second unit section are different from each other, and
a rate of change of the stretching ratio between two first unit sections in the first stretching machine and a rate of change of the stretching ratio between two second unit sections in the second stretching machine are different from each other.

3 more elements

Dependencies are inferred from the claim text.

Facts

Application: 17/856,437Filed 1 Jul 2022
Priority: KR 10-2021-019133129 Dec 2021
Published: US 2023/0207961 A129 Jun 2023
Granted: 18 Feb 2025
Term ends: Not estimatedThe source records don’t support an estimate.

Classification8 codes

B29C 55/065
Parallel with the direction of feed: in several stretching steps
H01M 50/406
Manufacturing processes of separators, membranes or diaphragms: moulding; Embossing; Cutting
H01M 50/417
Synthetic resins, e.g. thermoplastics or thermosetting resins: polyolefins
H01M 50/449
Separators, membranes or diaphragms characterised by the material: having a layered structure