Pressure-sensitive adhesive tape applied to connection of aluminum foil coiled material in lithium battery production and preparation method thereof

Abstract

The invention relates to the technical field of adhesive tapes for lithium battery production, in particular to a pressure-sensitive adhesive tape applied to connection of aluminum foil coiled materials for lithium battery production and a preparation method of the pressure-sensitive adhesive tape, the pressure-sensitive adhesive tape comprises a base material layer and an adhesive layer coated onthe base material layer, and the adhesive layer comprises the following raw materials in parts by weight: 10-20 parts of 2-ethylhexyl acrylate, 10-20 parts of butyl acrylate, 5-10 parts of methyl methacrylate, 1-2 parts of 1, 6hexanediol diacrylate, 8-12 parts of acrylic acid, 8-12 parts of glycidyl methacrylate, 0.2-0.5 part of dibenzoyl peroxide initiator, 0.2-0.4 part of multifunctional aziridine and 40-56 parts of solvent. The adhesive tape has especially excellent adhesion to an aluminum foil coiled material, the viscosity change is extremely small in a high-temperature environment, degumming is not likely to happen, and the deformation quantity of an adhesive layer of the adhesive tape is extremely small.

Description

Technical field[0001]The invention relates to the technical field of adhesive tapes for lithium battery production, in particular to a pressure-sensitive adhesive tape applied to the connection of aluminum foil coils for lithium battery production and a preparation method thereof.Background technique[0002]In the process of lithium battery production, it is necessary to use aluminum foil coils to produce lithium batteries. With the gradual increase in production efficiency requirements of mechanical automation production, in order to achieve continuous production, it is necessary to glue the ends of the two battery aluminum foil coils together through tape, so as to avoid the alignment and feeding work of the coils. High-precision automatic continuous feeding. In the actual use process, because the production needs to be carried out in a certain high temperature environment, the tape must have good high temperature resistance and at the same time have a unique high adhesion to alumin...

AI Technical Summary

Problems solved by technology

And if the viscosity of the adhesive tape changes too much in the high temperature environment during processing, the connection end of the two rolls of coils will loosen or the adhesive layer will be deformed, resulting in deformation or even breaking of the tape, and the gap between the two rolls of coils will increase. Large, which affects the feeding accuracy, and then needs to re-adjust the feeding accuracy of the equipment, interrupting the continuous production. However, it is difficult for the tapes on the market to meet the above requirements at the same time.