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Composite type vehicle sound insulation pad

A sound insulation pad, composite technology, applied in vehicle parts, synthetic resin layered products, heating/cooling fabrics, etc., can solve the problems of high cost, heavy weight, complicated process, etc. Effect

Inactive Publication Date: 2013-07-03
SHANGHAI XINAN CAR DEADENING FELT
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

(2) EPDM + sound insulation pad composite structure: heavy weight, high cost, complicated process

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] A series of Shanghai Xin'an-front wall sound insulation pad for automobile passenger compartment [high density V (200 density) series, low density V (70 density) series], the sound insulation pad is a two-layer composite structure, the upper layer is high-density sound insulation Material layer, density is 200kg / m 3 , The lower layer is a low-density sound insulation material layer with a density of 70kg / m 3 , The two sound insulation material layers are bonded by copolyester hot-melt adhesive and formed by hot pressing. The pressure of the hot pressing is 150bar, the temperature is 200℃, and the processing time is 500s.

[0019] Among them, the high-density sound insulation material layer is made of cloth blooming and composite polyester fiber. The cloth blooming and composite polyester fiber are mixed at a weight ratio of 70:30. After carding and netting, they are placed in an oven to control the temperature. Perform heat setting treatment at 160°C for 4 minutes, and then...

Embodiment 2

[0022] A composite sound-insulating mat for vehicles, the sound-insulating mat is a two-layer composite structure, the upper layer is a high-density sound-insulating material layer, and the density is 220kg / m 3 , The lower layer is a low-density sound insulation material layer with a density of 150kg / m 3 , The two sound insulation material layers are bonded by copolyester hot-melt adhesive and formed by hot pressing. The pressure of the hot pressing is 200bar, the temperature is 220℃, and the processing time is 120s.

[0023] Among them, the high-density sound insulation material layer is made of cloth blooming and composite polyester fiber as raw materials. The cloth blooming and composite polypropylene fiber are mixed at a weight ratio of 75:25. After carding and netting, they are placed in an oven to control the temperature. Heat setting treatment at 190°C for 2 minutes, and then cut to obtain a high-density sound insulation material layer.

[0024] The low-density sound insulati...

Embodiment 3

[0026] A composite sound-insulating mat for vehicles, with a three-layer composite structure, the middle layer is a high-density sound-insulating material layer, and the density is 210kg / m 3 , The upper and lower layers are low-density sound insulation material layers with a density of 160kg / m 3 . The sound-insulating material layers are bonded by a copolyester hot melt adhesive and formed by hot pressing. The pressure of the hot pressing is 180 bar, the temperature is 210°C, and the treatment time is 300 seconds.

[0027] Among them, the high-density sound insulation material layer is made of cloth blooming and composite polyester fiber as raw materials. The cloth blooming and composite polypropylene fiber are mixed at a weight ratio of 75:25. After carding and netting, they are placed in an oven to control the temperature. Heat setting treatment at 190°C for 2 minutes, and then cut to obtain a high-density sound insulation material layer.

[0028] The low-density sound insulation...

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Abstract

The invention relates to a composite type vehicle sound insulation pad, which is compounded by multiple sound insulating material layers of different densities. The sound insulating material layers are bonded by a binder and are subjected to hot pressing molding. Compared with the prior art, the sound insulation pad provided in the invention can absorb and attenuate high-frequency and low-frequency noise so as to achieve the effect of strengthening overall noise reduction, and the high density layer can also play a skeleton role.

Description

Technical field [0001] The invention relates to a sound-insulating pad for automobiles, in particular to a composite sound-insulating pad for automobiles. Background technique [0002] At present, the front wall in the passenger compartment of the automobile industry mainly includes two structures: (1) Most of the parts are made of single-layer uniform thickness materials. Since the outer side of the front wall is the engine compartment, the engine will produce a lot of noise when it is working, and the noise is divided into two parts: high frequency and low frequency; the sound insulation pad made of single-layer structure can significantly absorb high frequency noise , Attenuation, and can only partially absorb low-frequency noise. (2) EPDM + sound insulation mat composite structure: heavy weight, high cost, and complicated process. Summary of the invention [0003] The purpose of the present invention is to overcome the above-mentioned defects in the prior art and provide a c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B32B27/02D04H1/4382D06C7/02B60R13/08
Inventor 金军
Owner SHANGHAI XINAN CAR DEADENING FELT
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