Composite sound absorption plastic preparation method

A technology of sound-absorbing materials and plastics, which is applied in the field of preparation of composite sound-absorbing plastics, can solve problems such as fiber dust pollution, and achieve the effects of high sound absorption coefficient, wide sound absorption noise range, and excellent acoustic performance

Inactive Publication Date: 2013-11-27
WUJIANG CITY LI DA LUSTRE FINISHED PROD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantage is that rock wool is used in the preparation process, which will cause fiber dust pollution.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] According to mass percentage, 50% polyvinyl chloride resin, 10% rock wool, 20% nitrile rubber, 15% hollow glass microspheres with a particle size of 50 microns, 1.5% silane coupling agent, 1% magnesium hydroxide, and 2.5% The magnesium stearate stabilizer is stirred and mixed evenly; the above-mentioned mixture is kneaded at a temperature of 130-150°C on a mixer for 10-30 minutes to obtain a green body, and the green body is foamed at a temperature of 200-220°C in an oven to prepare Get 20mm sound absorbing material.

Embodiment 2

[0015] Embodiment 2 is by mass percentage with polyvinyl chloride resin 60%, rock wool 15%, nitrile rubber 20%, silane coupling agent 1.5%, 1% magnesium hydroxide, the magnesium stearate stabilizer of 2.5% is stirred and mixed ; Knead the above mixture on a kneader at a temperature of 130-150°C for 10-30 minutes to obtain a green body, and foam the green body at a temperature of 200-220°C in an oven to prepare a 20mm sound-absorbing material.

[0016] Table 1 Comparison results of the sound absorption coefficient table of sound-absorbing materials

[0017] Frequency / Hz 125 250 500 1000 2000 4000 Example 1 0.88 0.94 1.01 0.84 1.11 0.98 Example 2 0.21 0.56 0.79 0.57 0.73 0.04

[0018] Show from table 1 result, the sound absorption coefficient of embodiment 1 is obviously bigger than embodiment 1, and when high frequency and low frequency, embodiment 2 sound absorption coefficient has no obvious absorption, but embodiment 1 changes very mu...

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PUM

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Abstract

The present invention provides a composite sound absorption plastic preparation method, which comprises: uniformly stirring and mixing 30-70% by mass of a polyvinyl chloride resin, 10-20% by mass of rock wool, 20-60% by mass of a nitrile butadiene rubber, 10-20% by mass of hollow glass micro-beads, 0.1-5% by mass of a silane coupling agent, 0.5-3% by mass of magnesium hydroxide, and 1-5% by mass of a magnesium stearate stabilizer, carrying out mixing on the obtained mixture for 10-30 min on a mixer at a temperature of 130-150 DEG C to prepare a green body, and forming the green body in an oven at a temperature of 200-220 DEG C to prepare the sound absorption material with excellent comprehensive performances. According to the present invention, the hollow glass micro-bead component is added based on the polyvinyl chloride, the rock wool and the nitrile butadiene rubber, such that a sound and noise absorption range is wide, and a sound absorption coefficient is high; with high porosity of the material and three-dimensional uniform distribution of pores, excellent acoustic performances are provided, wherein a sound absorption coefficient is high, and an application frequency band range is wide; and characteristics of easy processing, no pollution, dust-resistance, moisture resistance, good decoration effect and the like are provided.

Description

technical field [0001] The invention relates to a preparation method of a sound-absorbing material, in particular to a preparation method of a composite sound-absorbing plastic that can significantly improve the sound-absorbing performance of middle and low frequencies. Background technique [0002] With the development of industry, noise has become one of the three major pollution sources in the world today. Noise not only harms the human auditory system, but also [0003] People are tired and deaf, and it will accelerate the aging of buildings and mechanical structures, affecting the accuracy and service life of equipment and instruments. The problem of noise control has gradually attracted the attention of governments and scientific and technological workers in various countries. At present, the main solution is to use sound-absorbing materials for sound absorption and noise reduction. According to the sound absorption mechanism, sound-absorbing materials can be divided...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L27/06C08L9/02C08K7/28C08K7/04C08K3/22C08K5/098
Inventor 凌元若
Owner WUJIANG CITY LI DA LUSTRE FINISHED PROD
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