Molecular sieve, sound absorbing material comprising same as well as loudspeaker

Abstract

The invention provides a molecular sieve, a sound absorbing material comprising the same as well as a loudspeaker. The molecular sieve is a core-shell molecular sieve which comprises a core phase molecular sieve and a shell layer molecular sieve, wherein the average pore size of the shell layer molecular sieve is larger than that of the core phase molecular sieve; internal acting micropores can beprotected by the shell layer molecular sieve and prevented from being blocked, so that resonance frequency f0 of the molecular sieve with the same volume is reduced, the bass effect is enhanced remarkably, and performance stability is improved.

Description

【Technical field】 [0001] The invention relates to a molecular sieve and its application, in particular to a core-shell molecular sieve and sound-absorbing materials and acoustic devices using the core-shell molecular sieve. 【Background technique】 [0002] In the process of rapid development of portable electronic products such as mobile phones, users have higher and higher functional requirements for products, thus, the development of sound-generating devices is also accelerated accordingly. A sound emitting device in the related art includes a housing with a cavity and a sounder unit installed on the housing. Since the cavity is a closed structure and the volume of the cavity is relatively small, the resonant frequency f of the sound-generating device 0 Higher, resulting in poor low-frequency performance of the sound-generating device, and it is difficult to produce high-quality, especially thick bass effects. [0003] In order to make more and more light and thin electro...

AI Technical Summary

Problems solved by technology

[0006] 1. The main function of molecular sieve is the surface micropores. During the molding process, adhesives are needed to bond these molecular sieve powders together, which leads to a considerable part of the micropores on the surface being blocked by adhesives. When the speaker is working, only Part of the micropores on the surface are adsorbing and desorbing air, so that f 0 The reduction and the improvement effect on the bass are limited;

[0007] 2. Molecular sieve materials with a single structure, because of their single surface properties, are easy to absorb moisture in the air, organic substances volatilized from speakers or other electronic components, and when moisture or organic substances block micropores, it becomes difficult for air molecules to enter and exit. Molecular sieves All or part of the performance disappears, CN104994461A, CN105049997A and other patents also pay attention to the failure of molecular sieves

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