Sound absorption material preparation method and sound absorption material

Abstract

The invention relates to a sound absorption material preparation method and a sound absorption material. The method comprises the following steps: S1, preparing non-foaming material slurry, and uniformly mixing; S2, forming the non-foaming material slurry by adopting an oil column forming method, and forming wet particles; S3, drying the wet particles to form dry particles; S4, roasting the dry particles to form sound absorption material particles. The method has the characteristics of simplicity in operation and high reliability, and the formed particles are uniform in size, smooth in surface and good in sphericity degree; particles mutually contact one another in a point-to-point manner and are uniformly stacked, and the bed-process resistance is small. The invention also provides the sound absorption material. The sound absorption material is prepared from a non-foaming material and is of spherical particles. The sound absorption material has the characteristics of high mass transfer efficiency, good sound absorption effect and uneasiness in dusting when in use.

Description

technical field [0001] The invention relates to the technical field of material preparation, and more specifically, to a method for preparing a sound-absorbing material and the sound-absorbing material. Background technique [0002] In recent years, with the increasingly thinner and thinner wearable electronic products, traditional sound-absorbing materials can no longer meet the needs of the speaker (SPK) industry for the adjustment and correction of acoustic performance. In response to this situation, new sound-absorbing materials have been continuously developed and tried. After verification, people have found that placing porous sound-absorbing materials in the rear cavity of the speaker device can effectively improve its acoustic performance. At present, such sound-absorbing materials with better application effects include one of the sound-absorbing materials such as natural zeolite, activated carbon, white carbon black, or zeolite powder with a silicon-aluminum ratio ...

AI Technical Summary

Problems solved by technology

Among them, the particles produced by extrusion method, boiling granulation method and rolling into ball method have poor strength, poor sphericity, rough surface and uneven particle size, the physical structure and performance are limited, and the main pore volume and pore size are small; spray The particles formed by the drying method are relatively small, and the particle size distribution is uneven

The traditional granulation method has a large particle size distribution range, poor sphericity, uneven and compact packing between particles, and unobstructed channels that are difficult to form between particles, resulting in a substantial increase in the overall mass transfer resistance of the sound-absorbing module. The speaker (SPK) The high-frequency airflow generated during the operation of the product is difficult to pass in and out of the sound-absorbing parts composed of sound-absorbing material particles, which reduces the effective use of the sound-absorbing parts and makes it difficult to achieve the ideal acoustic performance debugging effect

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