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US 2026/0196615 A1Published application
Gas-Permeable Film, Pouch Exterior Material Including Same, and Secondary Battery
AssigneeLG Energy Solution, Ltd.
InventorsSang Hun Kim, Hun Hee Lim, Hyung Kyun Yu, Soo Ji Hwang, Min Hyeong Kang, Dae Woong Song
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Abstract
A gas-permeable film including a first polymer layer, a second polymer layer, and a third polymer layer interposed between the first polymer layer and the second polymer layer is provided. The third polymer layer includes polypropylene and polytetrafluoroethylene at a weight ratio of 9:1 to 1:9. The gas-permeable film has excellent gas permeability. When applied to a secondary battery, the gas-permeable film may effectively discharge a gas generated inside the secondary battery.
Claims14
A gas-permeable film comprising:
- a first polymer layer;
- a second polymer layer;
- and
- a third polymer layer interposed between the first polymer layer and the second polymer layer,
- wherein the third polymer layer includes polypropylene and polytetrafluoroethylene at a weight ratio from 9:1 to 1:9.
2 more elements
Dependencies are inferred from the claim text.