A kind of low temperature resistant sound absorbing material and preparation method and application thereof

A technology of sound-absorbing material and low temperature resistance, applied in the field of electro-acoustic products, it can solve the problems of reducing audio performance, affecting speaker performance, reducing material pores, etc. Effect

Active Publication Date: 2022-08-02
SSI NEW MATERIAL (ZHENJIANG) CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The use scenarios of mobile terminal equipment are different. In low-temperature and cold regions, the audio performance of the speakers of mobile terminal equipment filled with sound-absorbing materials in the back cavity is significantly reduced. The analysis found that a lot of powder appeared in the back cavity of the mobile terminal equipment, indicating that low temperature will lead to adhesion. The flexibility of the agent is greatly reduced, the brittleness of the sound-absorbing material is enhanced, and the bond strength is reduced. When the speaker is working normally in a low-temperature and cold area, the high-speed air flow in the rear cavity will cause high-speed collisions of the sound-absorbing particles. When the stress is transmitted to the weak part of the adhesive , it is easy to cause the brittle binder to break, and then the particles that are brittle due to low temperature are more likely to be cracked and crushed, so that the purpose of virtual enlargement of the rear cavity cannot be achieved. More seriously, the broken powder may be broken. Through the insulating mesh, it enters the magnetic gap of the voice coil of the speaker unit, causing severe distortion of the speaker and affecting the performance of the speaker
[0004] In view of the above problems, at present, in this field, it is usually used to increase the amount of adhesive bonding or use a polymer binder with a lower glass transition temperature to prepare sound-absorbing materials, so that the obtained sound-absorbing materials have better low-temperature reliability, but this method will appear Problems such as hole blocking, material pore volume reduction, and high-temperature anti-stickiness of sound-absorbing particles deteriorate, which in turn reduces the overall sound-absorbing performance of the prepared sound-absorbing material

Method used

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  • A kind of low temperature resistant sound absorbing material and preparation method and application thereof
  • A kind of low temperature resistant sound absorbing material and preparation method and application thereof
  • A kind of low temperature resistant sound absorbing material and preparation method and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0058] The present embodiment provides a low temperature resistant sound-absorbing particle, which is prepared by a method comprising the following steps:

[0059] (1) adding the zeolite molecular sieve particles of 45g to the water of 35.37g, then adding the polyethylene glycol 200 of 1.2g, stirring and mixing to obtain a porous material mixed solution;

[0060] (2) 9.0 g of polyacrylate suspension (wherein, the solid content of the polyacrylate suspension is 45%, the glass transition temperature of the polyacrylate is 15° C., and the polyacrylate suspension has a core-shell structure ) and the dioctyl sebacate of 1g were added in 8.43g water, mixed and stirred to obtain a binder mixed solution; wherein, the polyacrylate suspension with core-shell structure used in the present embodiment was a conventional material, which could It can also be obtained by commercially available and conventional processes in the art;

[0061] (3) adding the binder mixture into the porous mater...

Embodiment 2

[0064] The present embodiment provides a low temperature resistant sound-absorbing particle, which is prepared by a method comprising the following steps:

[0065] (1) adding the zeolite molecular sieve particles of 45g into 35.37g of water, then adding 1.2g of polyethylene glycol 200 and stirring and mixing to obtain a porous material mixed solution;

[0066] (2) 9.0 g of polyacrylate suspension (wherein, the solid content of the polyacrylate suspension is 45%, the glass transition temperature of the polyacrylate is 15° C., and the polyacrylate suspension has a core-shell structure ) into 9.43 g of water, mixed and stirred evenly to obtain a binder mixture; wherein, the polyacrylate suspension with core-shell structure used in this embodiment is a conventional material, which can be obtained commercially or can be used in the art Prepared by conventional process;

[0067] (3) adding the binder mixture into the porous material mixture, stirring and mixing to obtain a mixed su...

Embodiment 3

[0070] The present embodiment provides a low temperature resistant sound-absorbing particle, which is prepared by a method comprising the following steps:

[0071] (1) adding the zeolite molecular sieve particles of 45g to 36.57g water, stirring and mixing to obtain a porous material mixed solution;

[0072] (2) 9.0 g of polyacrylate suspension (wherein, the solid content of the polyacrylate suspension is 45%, the glass transition temperature of the polyacrylate is 15° C., and the polyacrylate suspension has a core-shell structure ) and the dioctyl sebacate of 1g were added in 8.43g water, mixed and stirred to obtain a binder mixed solution; wherein, the polyacrylate suspension with core-shell structure used in the present embodiment was a conventional material, which could It can also be obtained by commercially available and conventional processes in the art;

[0073] (3) adding the binder mixture into the porous material mixture, stirring and mixing to obtain a mixed suspe...

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Abstract

The invention provides a low-temperature-resistant sound-absorbing material, a preparation method and application thereof. The raw materials of the material include porous material particles, a binder and a solvent, and the raw materials also include a cold-resistant plasticizer and / or a freezing-resistant auxiliary; The total weight of the obtained slurry after mixing is calculated as 100%, the amount of the porous material particles is 40-60%, the amount of the solvent is 30-60%, and when the raw material includes a freezing resistance aid, the amount is 0.5-3.0%; the amount of the porous material particles is 0.5-3.0%; Based on the weight of 100%, the amount of the binder is 4-12%; based on the total weight of the solid components in the binder as 100%, the amount of the cold-resistant plasticizer is 5-30%; the binder includes: One or more of the binder of core-shell structure and other binders, and the solid components of other binders include that the main segment has a non-conjugated double bond, an ether bond, or one of Si-O-Si. One or more of polymers with one or more structures, polymers with alternating structures or block structures.

Description

technical field [0001] The invention relates to a low-temperature-resistant sound-absorbing material, a preparation method and application thereof, and belongs to the technical field of electroacoustic products. Background technique [0002] Smartphones, TWS earphones, headphones and other mobile terminal devices have higher and higher requirements for audio quality. sound-absorbing particles, etc.) to virtually increase the volume of the rear cavity, thereby improving the audio quality. [0003] The usage scenarios of mobile terminal equipment are different. In low temperature and cold areas, the audio performance of the speaker of the mobile terminal equipment filled with sound-absorbing materials in the back cavity is significantly reduced. The analysis found that a lot of broken powder appeared in the back cavity of the mobile terminal equipment, indicating that low temperature will lead to adhesion. The flexibility of the agent is greatly reduced, the brittleness of th...

Claims

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Application Information

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Patent Type & AuthorityPatents(China)
IPC IPC(8): C04B26/04C04B111/52C04B111/76
CPCC04B26/04C04B2111/52C04B2111/76C04B14/047C04B24/28C04B24/045
Inventor张磊郭明波刘仁坤赵峻杰龚畅马院红
OwnerSSI NEW MATERIAL (ZHENJIANG) CO LTD