Vibrating diaphragm, preparation method thereof and acoustoelectric device

A film layer and material film technology, applied in the field of acoustic and electrical devices, can solve problems such as loss of corporate profits, product failure, and increase in speaker defect rate.

Pending Publication Date: 2021-04-23
辽宁弗佰克高新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As the temperature in the cavity rises, the mechanical properties of the diaphragm deteriorate, and the structure of the diaphragm changes accordingly, which affects and changes the acoust

Method used

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  • Vibrating diaphragm, preparation method thereof and acoustoelectric device
  • Vibrating diaphragm, preparation method thereof and acoustoelectric device
  • Vibrating diaphragm, preparation method thereof and acoustoelectric device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0092] The preparation method of the diaphragm provided in this embodiment includes the following steps:

[0093] After the reactor is filled with nitrogen, add 9 parts of diisocyanate and organotin catalyst to 4 parts of polyether diol, stir, heat up, add 2 parts of calcium carbonate, 1 part of white carbon black and 1 part of aramid fiber and continue stirring , and then add 3 parts of a mixed solution of diphthalic anhydride and a solvent to obtain a prepolymer; lower the temperature and add 4 parts of a mixed solution of a silane coupling agent and a solvent to the prepolymer under stirring conditions, mix well, The polyurethane-imide material layer is obtained by precision coating.

[0094] The diaphragm provided by this embodiment is as figure 1 As shown, the diaphragm is a one-layer structure made of the polyurethane-imide material layer with a thickness of 140 μm.

Embodiment 2

[0096] The preparation method of the diaphragm provided in this embodiment includes the following steps:

[0097] (a) After the reactor is filled with nitrogen, add 9 parts of diisocyanate and organotin catalyst to 5 parts of polyether diol, stir, heat up, add 1 part of mica powder, 2 parts of glass microspheres and 1 part of fiber to continue Stir, then add 4 parts of a mixed solution of diphthalic anhydride and a solvent to obtain a prepolymer; lower the temperature, add 5 parts of a mixed solution of a silane coupling agent and a solvent to the prepolymer under stirring conditions, and mix well , using a precision coating method to obtain a polyurethane-imide material layer;

[0098] (b) Compounding the polyurethane-imide material layer with an acrylic adhesive to obtain a vibrating membrane.

[0099] The diaphragm provided by this embodiment is as figure 2 As shown, it is a three-layer structure, as follows:

[0100] The top layer is polyurethane-imide material layer 1...

Embodiment 3

[0102] The preparation method of the diaphragm provided in this embodiment includes the following steps:

[0103] (a) After the reactor is filled with nitrogen, add 10 parts of diisocyanate and organotin catalyst to 7 parts of polyether diol, stir, heat up, add 2 parts of mica and 3 parts of kaolin and continue stirring, then add 4 parts of diisocyanate and organic tin catalyst A mixture of phthalic anhydride and solvent to prepare a prepolymer; add 6 parts of a mixture of silane coupling agent and solvent to the prepolymer under cooling and stirring, mix well, and adopt precision coating , to obtain a polyurethane-imide material layer;

[0104] (b) Compounding the polyurethane-imide material layer with a silicone adhesive to obtain a vibrating membrane.

[0105] The diaphragm provided by this embodiment is as image 3 As shown, it is a four-layer structure, as follows:

[0106] The top layer is a polyurethane-imide material layer with a thickness of 30 μm. The bottom laye...

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Abstract

The invention relates to the technical field of acoustoelectric devices, and particularly relates to a vibrating diaphragm, a preparation method thereof and an acoustoelectric device. The vibrating diaphragm comprises a polyurethane-imide material layer, wherein polyurethane-imide is prepared by introducing a polyimide functional group to a main chain of polyurethane. The temperature resistance and creep resistance of the vibrating diaphragm can be improved by adopting the polyurethane-imide material layer, and the product consistency is relatively stable and the tone quality is mellower even under the trial of high power. Moreover, according to the vibrating diaphragm provided by the invention, the content of other modified materials is added and adjusted, so that the vibrating diaphragm has the characteristics of high stretching rate and good thermoplasticity on the basis of improving the temperature resistance of the vibrating diaphragm.

Description

technical field [0001] The invention relates to the technical field of acoustic-electric devices, in particular, to a diaphragm, a preparation method thereof, and an acoustic-electric device. Background technique [0002] Diaphragm is the core component of acoustic and electrical devices such as loudspeakers. In the prior art, the diaphragm mostly adopts a polyurethane elastomer film layer, and the polyurethane elastomer has good elasticity, but is not temperature-resistant. [0003] The diaphragm is mainly installed in the cavity of the speaker and other acoustic and electrical devices. Under the high power amplitude, the diaphragm vibrates to generate high temperature, and the temperature is not easy to dissipate in the narrow cavity. As the temperature in the cavity rises, the mechanical properties of the diaphragm deteriorate, and the structure of the diaphragm changes accordingly, which affects and changes the acoustic performance of the speaker, which in turn leads to...

Claims

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Application Information

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IPC IPC(8): B32B27/40B32B27/28B32B7/12B32B7/10B32B27/08B32B27/34B32B25/08B32B37/06B32B37/10B32B37/12H04R31/00C08G18/66C08G18/48C08G18/34C08G73/10C08J5/18C08L75/08C08L77/10C08K3/26C08K7/26C08K7/20C08K3/34C08K3/04C08K13/04C08K7/06C08K7/14C08K3/30C08J9/04
CPCB32B27/40B32B27/281B32B7/12B32B7/10B32B27/08B32B27/34B32B25/08B32B37/06B32B37/10B32B37/1284H04R31/003C08G18/346C08G18/6692C08G73/1035C08J5/18C08J9/04C08J9/0066C08J2375/08C08J2477/10C08K2003/265C08K7/26C08K7/20C08K3/34C08K3/346C08K13/04C08K7/06C08K7/14C08K2003/3045H04R2231/00B32B2307/306B32B2307/308
Inventor 范雷达庞健
Owner 辽宁弗佰克高新材料有限公司
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