Composite material for automobile wheel cover

A composite material and wheel cover technology, which is applied to vehicle parts, synthetic resin layered products, transportation and packaging, etc., can solve problems such as poor sound insulation effect and low sound transmission loss of wheel covers

Active Publication Date: 2018-10-26
广州泰力高汽车零部件有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to solve the problem that the existing automobile wheel cover adopts the poor sound insulation effect of thermoplastic resin fiber thermocompression molding, and the wheel cover obtained by PP+EPDM or PE blending injection molding or blending extruded sheet has obvious sound insulation effect. Problems in the trough of sound transmission loss, and provide automotive wheel cover composite materials that have significantly improved sound insulation and no obvious sound transmission loss in the mid-to-high frequency range

Method used

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  • Composite material for automobile wheel cover
  • Composite material for automobile wheel cover

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] An automobile wheel cover composite material, comprising a first non-woven fabric layer 1, a sound-absorbing cotton layer 2, a polymer resin combined sheet layer 3 and a second non-woven fabric layer 4 sequentially laminated from top to bottom;

[0030] The polymer resin composite sheet layer 3 is composed of three layers with a thickness of 1.2-1.3mm and a density of 1.5-1.6g / mm 3 EVA 1 Sheet, thickness 0.8~0.9mm, density 1.3~1.4g / mm 3 EVA 2 Sheet, thickness 1.3~1.4mm, density 1.7~1.8g / mm 3 EVA 3 laminated sheets;

[0031] The first non-woven fabric layer 1 is a PET non-woven fabric with a weight of 20g / m 2 ;

[0032] The sound-absorbing cotton layer 2 is PP / PET two-component fiber cotton with a fiber fineness of 0.3-30 denier and a weight of 400g / m 2 ;

[0033] The second non-woven fabric layer 4 is a PET non-woven fabric, and the weight is 40g / m 2 ;

[0034] The first non-woven fabric layer 1, the sound-absorbing cotton layer 2, the polymer resin combined s...

Embodiment 2

[0036] An automobile wheel cover composite material, comprising a first non-woven fabric layer 1, a sound-absorbing cotton layer 2, a polymer resin combined sheet layer 3 and a second non-woven fabric layer 4 sequentially laminated from top to bottom;

[0037] The polymer resin composite sheet layer 3 is composed of three layers with a thickness of 1.1-1.2mm and a density of 1.0-1.1g / mm 3 PP sheet with a thickness of 1.2-1.3mm and a density of 1.5-1.6g / mm 3 EVA 1 Sheet, thickness 1.0~1.1mm, density 1.3~1.4g / mm 3 EVA 2 Sheets are laminated; other are the same as embodiment 1; the average transmission loss coefficient of the obtained automobile wheel cover composite material is 40db, and high sound reflectivity is arranged in the medium and high frequency range, and there is no obvious sound transmission loss trough to occur, and It effectively solves the problems of stone impact and water impact when the car is running at high speed.

Embodiment 3

[0039] An automobile wheel cover composite material, comprising a first non-woven fabric layer 1, a sound-absorbing cotton layer 2, a polymer resin combined sheet layer 3 and a second non-woven fabric layer 4 sequentially laminated from top to bottom;

[0040] The polymer resin combined sheet layer 3 is composed of three layers with a thickness of 1.2-1.3mm and a density of 1.4-1.5g / mm 3 PET sheet with a thickness of 1.2-1.3mm and a density of 1.5-1.6g / mm 3 EVA 1 Sheet, thickness 0.8~0.9mm, density 1.3~1.4g / mm 3 EVA 2 Sheets are superimposed; others are the same as in Example 1; the average transmission loss coefficient of the obtained automobile wheel cover composite material is 42db, and there is no obvious sound transmission loss trough in the middle and high frequency ranges, and effectively solves the problem of high-speed driving of automobiles. The problem of rock and water hammer during the time.

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Abstract

The invention discloses a composite material for an automotive wheel cover. The composite material comprises a first non-woven fabric layer, a sound-absorbing cotton layer, a macromolecular resin composite sheet layer and a second non-woven fabric layer which are superposed from top to bottom in sequence; the macromolecular resin composite sheet layer is formed by superposing more than one layer of EVA sheet and a PP sheet and / or a PET sheet. As the macromolecular resin composite sheet layer formed by superposing the more than one layer of EVA sheet and the PP sheet and / or the PET sheet is selected, the composite material for the automotive wheel cover, disclosed by the invention, solves the problems that as an existing automotive wheel cover is obtained by hot-press forming of thermoplastic resin fibers, the sound insulation effect is worse, and the obvious sound transmission loss coefficient trough occurs in the wheel cover obtained by hot-press forming after a plate is extruded by PP+EPDM or PE blending injection or blending; the average sound transmission loss coefficient of the obtained composite material for the automotive wheel cover reaches 44 db, the sound reflectivity is high within a medium-high frequency scope, no obvious sound transmission loss trough occurs, and the noise problems caused by stone attack and water attack when an automobile travels at a high speed are effectively solved.

Description

technical field [0001] The invention relates to the technical field of automobile wheel cover shield materials, in particular to a composite material for automobile wheel covers. Background technique [0002] With the rapid development and upgrading of my country's automobile industry, the acoustic performance of automobiles has also received attention. When the car is running at high speed, the impact sound of water and stones, tire noise and road noise are directly transmitted into the car through the wheel cover plate. In order to improve the acoustic performance of the car, high-performance sound-proof wheel cover is one of the indispensable parts of the car. [0003] Most of the existing automobile wheel cover base materials are polypropylene (PP) + ethylene-propylene-diene rubber (EPDM) through blending injection molding, or EPDM composite PET non-woven fabric is reinforced with inorganic modification, but the sound insulation performance of EPDM and PP is relatively l...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B32B27/02B32B27/08B32B27/12B32B27/30B32B27/32B32B27/36B32B37/06B32B37/10
CPCB32B5/26B32B27/02B32B27/08B32B27/12B32B27/30B32B27/32B32B27/36B32B37/06B32B37/10B32B2262/0253B32B2262/0276B32B2262/14B32B2307/102B32B2309/02B32B2605/08
Inventor 何学斌孙继承罗敏雄宫金东
Owner 广州泰力高汽车零部件有限公司
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