Automobile enhanced roof soundproof pad in composite layer structure

A composite layer and sound insulation pad technology, which is applied in the direction of synthetic resin layered products, laminated, layered products, etc., can solve the problems of roof reinforcement, heavy weight, and lack of sound insulation pads

Inactive Publication Date: 2014-10-01
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
Most of the above-mentioned sound insulation pads do not have a reinforcing effect on the roof

Method used

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  • Automobile enhanced roof soundproof pad in composite layer structure
  • Automobile enhanced roof soundproof pad in composite layer structure

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] A kind of composite laminated roof reinforced sound insulation pad for automobiles, the sound insulation pad is a three-layer composite structure, and its structure is as follows figure 1 As shown, the upper and lower layers are surface-coated kraft paper layer 1, with a grammage of 200g / m 2 , the coating is 20g / m 2 , kraft paper coated with PE film on both sides, the middle layer is 50kg / m 3 High-density polyurethane sound insulation material layer 2, thickness 8mm. The high-density polyurethane sound-insulating material layer 2 is polyurethane semi-rigid foam, and the weight ratio of polyether and isocyanate is 80:20. After stirring and mixing, it is foamed, and then cut to obtain a high-density sound-insulating material layer with a uniform thickness of 8 mm.

Embodiment 2

[0022] A reinforced sound-insulating mat for the roof of a car with a composite layered structure, the sound-insulating mat is a three-layer composite structure, the upper layer and the lower layer are kraft paper layers coated on the surface, and the grammage is 200g / m 2 , the coating is 20g / m 2 , kraft paper coated with PE film on both sides, the middle layer is 50kg / m 3 High-density polyurethane sound insulation material layer, thickness 8mm. The high-density polyurethane sound-insulating material layer 2 is polyurethane semi-rigid foam, and the weight ratio of polyether and isocyanate is 70:30 after stirring and mixing, then foaming, and then cutting to obtain a high-density sound-insulating material layer with a uniform thickness of 8 mm.

Embodiment 3

[0024] A kind of composite laminated roof reinforced sound insulation pad for automobiles, its structure is as follows figure 2 As shown, the sound insulation pad is a five-layer composite structure, the upper layer and the lower layer are surface-coated non-woven fabrics 3, and the weight is 200g / m 2 , the coating is 20g / m 2 , coated with PE film on both sides of non-woven fabric, the middle layer is 30kg / m 3 Low-density polyurethane sound insulation material layer 5, 2 layers of 100g / m between non-woven fabric and polyurethane 2 The glass fiber mat layer 4.

[0025] The high-density polyurethane sound insulation material layer is made of polyurethane semi-rigid foam with a density of 30kg / m 3 , The weight ratio of polyether and isocyanate is 50:25, stirring and mixing, foaming, and then cutting to obtain a low-density sound-insulating material layer with a uniform thickness of 6 mm.

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Abstract

The invention relates to an automobile enhanced roof soundproof pad in a composite layer structure. The soundproof pad is obtained by combining multiple soundproof material layers through hot-press forming, and the soundproof material layers are bonded by binders, so that the soundproof pad is in a three-layer composite structure or a five-layer composite structure. Compared with the prior art, the soundproof pad disclosed by the invention has the functions of absorption and attenuation for noise, has a better heat insulating effect, and can enhance the structural strength of a roof.

Description

technical field [0001] The invention relates to a car roof sound insulation pad, in particular to a reinforced car roof sound insulation pad with a composite layered structure. Background technique [0002] At present, the roof sound insulation pads in the automotive industry mainly include two structures: (1) most of them use single-layer uniform thickness materials to make parts. Since the outer side of the front wall is the engine compartment, the engine will generate 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, but can only partially absorb low-frequency noise. (2) EPDM+sound insulation mat composite structure: heavy weight, high cost, complex process. Most of the above-mentioned sound insulation pads do not have the effect of strengthening the roof. Contents of the invention [0003] Th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60R13/08B32B27/10B32B37/10B32B37/12
Inventor 金军
Owner SHANGHAI XINAN CAR DEADENING FELT
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