Flame-retardant adhesive tape capable of being used for wrapping lithium ion battery and preparation method of flame-retardant adhesive tape

Abstract

The invention provides a flame-retardant adhesive tape capable of being used for wrapping a lithium ion battery. The flame-retardant adhesive tape comprises a printable coating, a base film layer, a flame-retardant coating and a pressure-sensitive adhesive layer which are sequentially compounded, wherein the total thickness of the flame-retardant adhesive tape is not more than 45 microns; the flame-retardant coating comprises the following components in parts by mass: 100 parts of flame-retardant resin, 100-200 parts of a flame retardant and 1-10 parts of an additive; and the pressure-sensitive adhesive layer comprises the following components in parts by mass: 80-120 parts of a polyacrylate pressure-sensitive adhesive and 0.01-2 parts of a cross-linking agent, the total mass of the polyacrylate pressure-sensitive adhesive and the cross-linking agent accounts for not less than 98% of the mass of the pressure-sensitive adhesive layer, and the balance is unavoidable impurities. The flame-retardant adhesive tape provided by the invention has the characteristics of printability, ultra-thinness, high transparency, good flame-retardant effect and high bonding strength, and has a good application prospect.

Description

technical field [0001] The invention belongs to the field of adhesive tapes, and in particular relates to a flame-retardant tape that can be used to wrap lithium-ion batteries and a preparation method thereof. Background technique [0002] The ultra-thinning of intelligent terminals has become a trend. The thickness of the tape used to wrap the battery is more than 45 μm. The thickness of the flame-retardant layer in the patent No. CN209702648 U "A Battery Tape with Flame-retardant Function" is 55-90 μm, which is not conducive to saving batteries. Space; In addition, with the improvement of mobile phone performance and integration, high battery capacity is becoming more and more popular, and the continuous operation of high battery capacity mobile phones will also generate heat, which may cause the risk of spontaneous combustion of lithium batteries. The tape flame retardant solution is an additive white powder flame retardant, the tape haze is generally >10%, and the tra...

AI Technical Summary

Problems solved by technology

[0002] The ultra-thinning of intelligent terminals has become a trend. The thickness of the tape used to wrap the battery is more than 45 μm. The thickness of the flame-retardant layer in the patent No. CN209702648 U "A Battery Tape with Flame-retardant Function" is 55-90 μm, which is not conducive to saving batteries. Space; In addition, with the improvement of mobile phone performance and integration, high battery capacity is becoming more and more popular, and the continuous operation of high battery capacity mobile phones will also generate heat, which may cause the risk of spontaneous combustion of lithium batteries. The tape flame retardant solution is an additive white powder flame retardant, the tape haze is generally >10%, and the transparency is low, which is not conducive to battery scanning and activation; in addition, battery wrapping tapes need to be die-cut and printed, so good Printability, patent No. CN203351121 U "A kind of ultra-thin flame-retardant trademark film" substrate layer is not processed, does not have good printability, and the addition of flame retardants mixed with glue will cause poor flame-retardant effect and poor adhesion Stable, high tape haze and other disadvantages

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