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A kind of TPU acoustic thin film and preparation method thereof

A film and acoustic technology, which is applied in the field of TPU acoustic film and its preparation, can solve the problems of restricting the application of micro-speaker acoustic film, TPU film is easy to burn, and the strength is difficult to guarantee, etc., and achieves low preparation cost, good flame retardancy and environmental protection performance , to avoid the effect of the influence of bond fastness

Active Publication Date: 2021-02-09
苏州市伽俐电子有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, TPU also has its own defects, such as poor impact resistance and difficult to guarantee strength.
In addition, the TPU film currently on the market has poor heat resistance. Once the ambient temperature is too high, the TPU film is easy to burn, which limits its application in the acoustic film of micro speakers.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

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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Abstract

The invention discloses a TPU acoustic film, which sequentially comprises a first outer layer, a first adhesion layer, a core layer, a second adhesion layer and a second outer layer from top to bottom, wherein the core layer is formed by a modified 1-chloromethyl-2,4-diisocyanobenzene / dimethyl dioxime polycondensate film, the first outer layer and the second outer layer are independently a modified TPU film, and the first adhesion layer and the second adhesion layer are independently formed by carrying out melt extrusion, cooling curing and roller calendering on at least one selected from an ethylene-vinyl acetate copolymer adhesive, an epoxy resin adhesive and a polyurethane adhesive at 220-250 DEG C. According to the invention, the TPU acoustic film retains the excellent characteristicsof high strength, tear resistance, wear resistance and the like of the TPU material, and further has characteristics of excellent heat resistance, excellent flame retardance, excellent environmental protection performance, high sensitivity, high consistency, good performance stability and long service life.

Description

technical field [0001] The invention relates to the technical field of acoustic thin films, in particular to a TPU acoustic thin film and a preparation method thereof. Background technique [0002] In recent years, with the development of economy, science and technology and social progress, people's demand for improving the quality of life has become more and more urgent. In addition to the material foundation, the improvement of the quality of life requires attention to the quality of the spiritual level. Speakers, microphones Because of its ability to transmit sound and emit pleasant singing, the acoustic device has brought many conveniences to people's life, work and study, especially entertainment, allowing people to enjoy the modern excellent material living conditions while enjoying the spiritual level Get pleasure, a song may make people stop tired and let them enjoy life better. [0003] The reason why acoustic devices such as speakers and microphones can transmit s...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B32B37/06B32B37/10B32B27/08B32B27/40B32B27/28B32B37/12B32B7/12C08L75/04C08L67/00C08L71/00C08L79/00C08K7/06C08K5/544C08J5/18
CPCB32B7/12B32B27/08B32B27/28B32B27/40B32B37/06B32B37/10B32B37/12C08J5/18C08J2375/04C08J2379/00C08J2467/00C08J2471/00C08K5/544C08K7/06C08K2201/011
Inventor 夏超华
Owner 苏州市伽俐电子有限公司
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