Flame retardant expanded double-sided tape and preparation process thereof

Abstract

The invention relates to a flame retardant expanded double-sided tape. The flame retardant expanded double-sided tape comprises a first composite acrylic acid glue layer, a flame-retarded polystyrenesynthetic resin layer, a second composite acrylic acid glue layer and a double-sided release film layer which are sequentially arranged from top to bottom. Compared with the common flame-retardant expanded tape on the market, the product has high viscosity and strong fixing ability, so the an electrical core and an outer casing can be firmly fixed, the tape has the resistance to an electrolyte, does not affect the composition of the electrolyte, does not affect the performance of a battery, the expansion ratio of the tape exceeds 3 times, which is better to fill an assembly gap and reduce thepossibility of vibration displacement, and the double-sided tape has good safety.

Description

technical field [0001] The invention relates to a double-sided adhesive tape, in particular to a flame-retardant expansion double-sided adhesive tape and a preparation process thereof. Background technique [0002] At present, the new energy automobile industry is developing rapidly, and at the same time, it puts forward high requirements for the safety performance of new energy batteries. In the later stage of equipment operation, there will often be severe vibrations. At this time, there may be friction and damage between the battery cell and the shell, resulting in the risk of short circuit of the battery. Therefore, in order to solve this problem, the battery cell and shell need to be Fill the gap between them, and at the same time fix the battery cell and the casing, so as to reduce the risk of battery short-circuit fire and explosion caused by equipment vibration. Therefore, it is necessary to develop a special tape with these functions. The tape will expand and chang...

AI Technical Summary

Problems solved by technology

However, the expansion tapes on the market have problems such as instability, poor viscosity, and easy to react with the electrolyte of the battery.

[0003] For example, the application publication number is CN107746682A, and the Chinese patent titled "A Method for Making Acrylic Expansion Tape" mainly discloses a method for making an expansion tape, which has good corrosion resistance and high expansion rate. Therefore, in a certain To a certain extent, it solves the problems of general expansion tapes such as instability and poor viscosity; however, when the base material is treated, one side of the tape is treated with a different haze by means of a back coating, but since the base layer is still a single-sided adhesive layer, The viscosity is relatively low, so it is not able to effectively and safely fix the battery core

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