A kind of double-sided adhesive tape for lithium battery and preparation method thereof

Abstract

The invention relates to a double-sided adhesive tape for lithium batteries, which comprises a first sealing hot-melt pressure-sensitive adhesive layer, a base film layer, a second sealing hot-melt pressure-sensitive adhesive layer, and a non-tacky sealing adhesive layer at normal temperature sequentially connected from top to bottom And double-sided silicon-free release film layer; the double-sided adhesive tape for lithium battery has adhesion to aluminum foil and polyethylene film at room temperature, and the other side has no adhesion to polypropylene surface below 80 ° C, which meets the requirements of lithium battery The production process requirements; the adhesive layer of the double-sided tape does not contain impurities such as release agents, which maintains the purity of the adhesive layer. The adhesive layer can maintain high stability when soaked in the electrolyte, resist corrosion by the electrolyte, and do not occur electrochemical reaction, can maintain the performance of the lithium battery, and improve the service life of the lithium battery.

Description

technical field [0001] The invention relates to the technical field of bonding supplies, in particular to a double-sided adhesive tape for lithium batteries and a preparation method thereof. Background technique [0002] Due to its high energy density, lithium batteries can be recycled many times, have a long life and low pollution, and are widely used in mobile phones, notebooks and other fields. With the improvement of science and technology, the requirements for lithium batteries in various fields are getting higher and higher, among which high requirements are put forward for the anti-drop performance of lithium batteries, which determines the stability and safety of lithium batteries. The anti-drop performance of lithium batteries is mainly determined by the adhesion between the electrode group and the outer packaging material. If the adhesion between the battery electrode group and the outer packaging material is not good, when the battery moves horizontally or vertica...

AI Technical Summary

Problems solved by technology

[0004] In addition, other impurities cannot be introduced during the production of double-sided tape, otherwise it will affect the performance of lithium batteries

For example, in the prior art, the release agent will be partially transferred to the adhesive layer during the silicone release paper transfer method, thereby polluting the adhesive layer, reducing the performance of the lithium battery, and reducing the service life of the lithium battery.

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