Title:
MULTILAYER FILM FOR SECONDARY BATTERY CELL POUCH AND MANUFACTURING METHOD THEREFOR
Document Type and Number:
WIPO Patent Application WO/2023/140576
Kind Code:
A1
Abstract:
The present invention relates to a multilayer film for a secondary battery cell pouch and a manufacturing method therefor and, specifically, to a multilayer film for a secondary battery cell pouch and a manufacturing method therefor, wherein the multilayer film having excellent film characteristics, such as water resistance, airtightness, chemical resistance, strength, surface tension, electrolysis resistance, and heat resistance, is obtained by simultaneously biaxially stretching a laminate, composed of a plurality of resin layers and adhesive layers, at a time. The multilayer film for a secondary battery cell pouch of the present invention is obtained by simultaneously biaxially stretching a multilayer laminate at a time, the multilayer laminate sequentially comprising an upper resin layer (10), an intermediate resin layer (20), a lower resin layer (30), and adhesive layers (40) formed between the respective resin layers. In the present invention, a multilayer film excellent in several film characteristics, such as airtightness, chemical resistance, electrolysis resistance, adhesive strength, and heat resistance, is manufactured by simultaneously biaxially stretching a laminate, composed of a plurality of resin layers and adhesive layers, at a time, so that a multilayer film can be obtained that is excellent in properties required as a cell pouch film for a secondary battery while bringing a significant reduction in time and cost.
Inventors:
KIM CHAN SIK (KR)
Application Number:
PCT/KR2023/000714
Publication Date:
July 27, 2023
Filing Date:
January 16, 2023
Export Citation:
Assignee:
KIM CHAN SIK (KR)
International Classes:
B32B27/08; B32B7/12; B32B15/08; B32B15/20; B32B27/18; B32B27/28; B32B27/30; B32B27/32; B32B37/12
Foreign References:
| KR20210112085A | 2021-09-14 | |||
| KR20200077666A | 2020-07-01 | |||
| KR101289691B1 | 2013-08-01 | |||
| KR20200090584A | 2020-07-29 | |||
| KR20160031838A | 2016-03-23 |
Attorney, Agent or Firm:
YOU, Byung Sun (KR)
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