COMPOSITE PACKAGING MATERIAL FOR LITHIUM BATTERY
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United States of America Patent
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Apr 1, 2021
app pub date -
May 5, 2020
filing date -
Sep 27, 2019
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Abstract
The present disclosure relates to a composite packaging material for a lithium battery. The composite packaging material for a lithium battery sequentially comprises a protective layer, a polyurethane adhesive layer, an aluminum foil layer, a polyolefin adhesive layer and a heat seal layer. Wherein, a damping factor (tan δ) of the polyurethane adhesive layer is in the range of 0.45 and 0.6. The polyurethane adhesive layer has suitable damping property such that the stress applied to the composite packaging material by the deep drawing equipment can be buffered and dissipated, so that the formability of the composite packaging material can be enhanced and the damage of the composite packaging material can be reduced during a deep drawing process.
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