TPU acoustic film and preparation method thereof
A thin film and acoustic technology, which is applied in the field of TPU acoustic film and its preparation, can solve the problems of limiting the application of micro-speaker acoustic film, TPU film is easy to burn, poor impact resistance, etc., and achieves low preparation cost, not easy to fall off between layers, high performance good stability effect
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Embodiment 1
[0032] A kind of TPU acoustic film, it is characterized in that, from top to bottom successively comprises the first outer layer, the first adhesive layer, core layer, the second adhesive layer, the second outer layer; Described core layer is modified 1- Chloromethyl-2,4-diisocyanobenzene / dimethyldioxime polycondensate film is formed, and the first outer layer and the second outer layer are independently modified TPU films; the first adhesive The layer and the second adhesive layer are independently formed by ethylene-vinyl acetate copolymer adhesive through melt extrusion at 220°C, cooling and solidification, and roll calendering; the modified 1-chloromethyl-2,4 -Diisocyanobenzene / dimethyldioxime polycondensate film is first formed by polycondensation reaction of 1-chloromethyl-2,4-diisocyanobenzene and dimethyldioxime, and then adding 4, 4'-bis(N,N-dimethylamino)benzophenone reacts to form a cross-linked structure, and then undergoes ion exchange with 1-adamantanecarboxylic ...
Embodiment 2
[0040] A kind of TPU acoustic film, it is characterized in that, from top to bottom successively comprises the first outer layer, the first adhesive layer, core layer, the second adhesive layer, the second outer layer; Described core layer is modified 1- Chloromethyl-2,4-diisocyanobenzene / dimethyldioxime polycondensate film is formed, and the first outer layer and the second outer layer are independently modified TPU films; the first adhesive The layer and the second adhesive layer are independently formed by epoxy resin adhesive through melt extrusion at 230°C, cooling and solidification, and roll calendering; the modified 1-chloromethyl-2,4-diisocyanate Benzene / dimethyldioxime polycondensate film is formed by polycondensation reaction of 1-chloromethyl-2,4-diisocyanobenzene and dimethyldioxime, and then adding 4,4'-diisocyanobenzene (N,N-Dimethylamino)benzophenone reacts to form a cross-linked structure, and then undergoes ion exchange with 1-adamantanecarboxylic acid, and i...
Embodiment 3
[0048] A kind of TPU acoustic film, it is characterized in that, from top to bottom successively comprises the first outer layer, the first adhesive layer, core layer, the second adhesive layer, the second outer layer; Described core layer is modified 1- Chloromethyl-2,4-diisocyanobenzene / dimethyldioxime polycondensate film is formed, and the first outer layer and the second outer layer are independently modified TPU films; the first adhesive The first layer and the second adhesive layer are independently formed by polyurethane adhesive through melt extrusion at 235°C, cooling and solidification, and roll calendering; the modified 1-chloromethyl-2,4-diisocyanobenzene / Dimethyldioxime polycondensate film is first formed by polycondensation reaction of 1-chloromethyl-2,4-diisocyanobenzene and dimethyldioxime, and then adding 4,4'-bis(N , N-Dimethylamino) benzophenone reacts to form a cross-linked structure, and then ion-exchanges with 1-adamantanecarboxylic acid, and is calender...
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