Crystal composite fiber with porous sound absorption structure and preparation method thereof

Abstract

The invention relates to the field of sound absorption materials, in particular to a crystal composite fiber with a porous sound absorption structure and a preparation method thereof. A plurality of extremely small pores are formed in a crystal composite fiber body to form sound absorption gaps, sound waves penetrate into the pores of the material, the pores are mostly opening holes (sound absorption gaps) with communicated interiors, and the pores are subjected to friction and viscous resistance of air molecules and enable fine fibers to perform mechanical vibration, so that sound energy is converted into heat energy. The sound absorption coefficient of the porous sound absorption material is generally gradually increased from low frequency to high frequency, so that the sound absorptioneffect on sounds at high frequency and medium frequency is better. Polypropylene Z30S forms the resonance sound absorption structure of the crystal composite fiber, when the frequency of the sound waves is consistent with the natural vibration frequency of the resonance sound absorption structure, resonance occurs, and the sound waves excite the resonance sound absorption structure to vibrate andenable the amplitude to reach the maximum, so that the sound energy is consumed, and the purpose of sound absorption is achieved.

Description

technical field [0001] The invention relates to the field of sound-absorbing materials, in particular to a crystal composite fiber with a porous sound-absorbing structure and a preparation method thereof. Background technique [0002] At present, sound-absorbing materials are developing rapidly in the fields of household, automobile, construction, etc. With the continuous efforts of researchers, the performance of non-woven sound-absorbing materials has become increasingly excellent, which largely meets the needs of society, but there is still no material that can Sound waves in different frequency bands are completely absorbed. In order to better improve the sound-absorbing performance of sound-absorbing materials, more efforts should be made on the basis of combining the porous sound-absorbing mechanism and the resonant sound-absorbing mechanism. Different low-frequency bands have high-efficiency sound-absorbing performance. At the same time, combined with the own charac...

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Problems solved by technology

[0002] At present, sound-absorbing materials are developing rapidly in the fields of household, automobile, construction, etc. With the continuous efforts of researchers, the performance of non-woven sound-absorbing materials has become increasingly excellent, which largely meets the needs of society, but there is still no material that can Sound waves in different frequency bands are completely absorbed

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