Composite material with functions of sound absorption and damping vibration attenuation

A composite material and damping technology, which is applied in the field of vibration-absorbing composite materials and its preparation, can solve the problems of poor mechanical properties of porous materials, and achieve the effects of widening the action temperature range, simple operation, and good economic benefits

Inactive Publication Date: 2009-10-21
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In order to solve the defects caused by the combination of vibration damping and sound absorption, the working mechanism of vibration damping materials and sound absorption materials must be explored. In general, in order to convert high-polymer damping and vibration absorption materials into sound absorption materials, usually The best method is to make the material porous or microporous. However, the mechanical properties of the porous material itself are poor, which means that in order to achieve the sound absorption effect, it is necessary to pay a price for another function. For engineering The field of applied materials is not worth the candle

Method used

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  • Composite material with functions of sound absorption and damping vibration attenuation
  • Composite material with functions of sound absorption and damping vibration attenuation
  • Composite material with functions of sound absorption and damping vibration attenuation

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] The volume percentage of each component of the new sound-absorbing and damping composite material adopts CPE:SHPF=100:15 (20:3), and the preparation steps of the composite material are as follows:

[0031] The first step of mixing:

[0032] 1> Raise the temperature of the rollers on the double-roller plastic refining machine to 65°C and keep it basically stable;

[0033] 2> Add CPE with a weight of 100 parts between the rollers, and make the CPE into sheets through the surface temperature of the rollers and the pressure of the rollers, and it will be in a viscous flow state between the rollers;

[0034] 3> Add SHPF with a weight of 15 parts between the rollers, and use a cutter to assist mixing to make the components evenly mixed;

[0035] 4> The total mixing time is 40 minutes. After mixing evenly, peel the mixed material from the roller and cool it at room temperature for hot pressing.

[0036] The second step of thermoforming:

[0037] 1> Spread the cooled mixed f...

Embodiment 2

[0042] The weight percentage of each component of the novel sound-absorbing composite material with damping and vibration reduction is CPE: SHPF=100:20 (20:4). The preparation steps of the composite material are the same as in Example 1, and the process is different from that in Example 1. The same thing is:

[0043] 1>The temperature is 65°C when the raw materials are evenly mixed on the double-roller plasticizing machine, and the mixing time is 50 minutes.

[0044] 2> Hot press the sample under the flat vulcanizing machine, the temperature is 160 ℃, and the preheating time is 20 minutes under the condition of no pressure.

[0045] 3> Pressurize with a pressure of 15Mpa for 20 minutes, and finally take out the material and cool it in ice water to obtain a composite material with high-performance vibration reduction and sound absorption.

Embodiment 3

[0047] The volume percentage of each component of the new sound-absorbing and damping composite material adopts CPE: SHPF=100:25 (20:5). Embodiment 1 is different in that:

[0048] 1> The temperature of the raw materials is 70°C when they are uniformly mixed on the double-roller extruding machine, and the mixing time is 60 minutes;

[0049] 2> Hot press the sample under the flat vulcanizing machine, the temperature is 180 ℃, and the preheating time is 30 minutes under the condition of no pressure.

[0050] 3> Pressurize for 30 minutes with a pressure of 18Mpa, and finally take out the material and cool it in ice water. In this way, a composite material with high-performance vibration reduction and sound absorption is obtained.

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Abstract

The invention relates to a composite material with the functions of sound absorption and damping vibration attenuation. The composite material comprises the following components: chlorinated polyethylene (CPE) and seven-hole polyester staple fiber (SPSF) with the volume percentage of 100:5 to 25; a preparation method comprises the following steps: (1) adding chlorinated polyethylene (CPE) powder in a roller to prepare a thin sheet; adding the seven-hole polyester staple fiber and mixing; peeling mixing materials, cooling at room temperature and obtaining mixed thin piece for spare use; and (2) evenly laying the mixed thin piece in a cavity of a mould; clamping the upper part and the lower part of the mould by steel plates; moving the steel plates into a plate vulcanizing press, discharging and pressurizing; taking down the steel plates, cooling the steel plates and the mixed materials with water, demoulding and obtaining the composite material. The composite material can be used for the preparation of automobiles, track traffic, building, machinery, household appliances and sport devices. The composite material with functions of sound absorption and damping vibration attenuation can effectively absorb energy when in vibration, expands the action temperature area of vibration attenuation and sound absorption with the adding of fiber materials; and the preparation method has simple operation and good economic benefit and is applicable to industrial production.

Description

technical field [0001] The invention belongs to the field of vibration-damping composite materials and their preparation, in particular to a sound-absorbing and damping-damping composite material and a preparation method thereof. Background technique [0002] In the existing polymer damping materials, vibration-absorbing materials and sound-absorbing materials are two types of materials that are strictly distinguished from each other, because in order to transform vibration-absorbing materials with high damping performance Forms such as holes can be transformed. But in this way, it is bound to destroy the mechanical properties of the material, so that the vibration damping performance will be low, which will bring troubles to the application of the material in the field of engineering applications. Due to the existence of micropores in the material, the mechanical properties of sound-absorbing materials are reduced, and it is difficult to be used in the field of vibration r...

Claims

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Application Information

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IPC IPC(8): C08L23/28C08L67/02B29B7/52B29B7/72B29C43/02B29C43/58
Inventor 晏雄姜生杨力生张慧萍
Owner DONGHUA UNIV
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