Flame retardant expanded double-sided tape and preparation process thereof

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. 本发明涉及到种阻燃膨胀双面胶带，由上至下依次包括第复合丙烯酸胶层、阻燃聚苯乙烯合成树脂层、第二复合丙烯酸胶层和双面离型膜层。与市面上常见的阻燃膨胀胶带带相比，产品具有粘性高、固定能力强，因此可以将电芯与外壳进行牢牢地固定，同时胶带具有耐电解液特性不会影响电解液成分组成不会影响电池性能，且