A kind of high sound-absorbing cmt reinforced polyurethane foam composite material for vehicles

A technology of polyurethane foam and composite materials, which is applied in the direction of synthetic resin layered products, film/sheet adhesives, chemical instruments and methods, etc., which can solve the problem of poor mechanical properties and difficult to improve mechanical properties of automobile bottom guards, Limited applications and other issues, to achieve the effects of good dimensional stability, dimensional stability, impact resistance, and improved mechanical properties

Active Publication Date: 2021-02-19
浙江华江科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although polyurethane foam has good sound absorption, heat insulation and dimensional stability, its mechanical properties are poor, and it is often used in automotive roof interior materials, which limits its application in the field of automotive interior and exterior decoration.
[0005] Therefore, it is difficult to improve the mechanical properties of polyurethane foam to meet the performance requirements of the car bottom guard through a single structural design of the polyurethane foam.

Method used

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  • A kind of high sound-absorbing cmt reinforced polyurethane foam composite material for vehicles
  • A kind of high sound-absorbing cmt reinforced polyurethane foam composite material for vehicles
  • A kind of high sound-absorbing cmt reinforced polyurethane foam composite material for vehicles

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Effect test

Embodiment 1

[0034] This embodiment is a high sound-absorbing CMT reinforced polyurethane foam composite material for vehicles, which is composed of a polyurethane foam composite layer for sound absorption and heat insulation and a CMT reinforced composite layer for reinforcement. Its structure from top to bottom is: polyurethane foam The composite layer includes a hydrophobic and oil-repellent layer, a breathable sound-absorbing adhesive layer, and a polyurethane foam sound-absorbing layer; a CMT reinforced composite layer includes an adhesive layer, a reinforcing layer, and an adhesive layer. The mass ratio per unit area of ​​the polyurethane foam composite layer and the CMT reinforced composite layer is 9:5.

[0035] The air-permeable and sound-absorbing adhesive layer is a perforated hot-melt adhesive film with an area density of 70g / m 2 . The polyurethane foam sound-absorbing layer is lightweight polyurethane foam with a bulk density of 28kg / m 3 , The porosity is 95%.

[0036] The ...

Embodiment 2

[0061] This embodiment is a high sound-absorbing CMT reinforced polyurethane foam composite material for vehicles, which is composed of a polyurethane foam composite layer for sound absorption and heat insulation and a CMT reinforced composite layer for reinforcement. Its structure from top to bottom is: polyurethane foam The composite layer includes a hydrophobic and oil-repellent layer, a breathable sound-absorbing adhesive layer, and a polyurethane foam sound-absorbing layer; a CMT reinforced composite layer includes an adhesive layer, a reinforcing layer, and an adhesive layer. The mass ratio per unit area of ​​the polyurethane foam composite layer and the CMT reinforced composite layer is 2:1.

[0062] The air-permeable and sound-absorbing adhesive layer is a hot-melt adhesive film with holes, and the surface density is 50g / m 2 . The polyurethane foam sound-absorbing layer is lightweight polyurethane foam with a bulk density of 28kg / m 3 , The porosity is 95%.

[0063] ...

Embodiment 3

[0078] This embodiment is a high sound-absorbing CMT reinforced polyurethane foam composite material for vehicles, which is composed of a polyurethane foam composite layer for sound absorption and heat insulation and a CMT reinforced composite layer for reinforcement. Its structure from top to bottom is: polyurethane foam The composite layer includes a hydrophobic and oil-repellent layer, a breathable sound-absorbing adhesive layer, and a polyurethane foam sound-absorbing layer; a CMT reinforced composite layer includes an adhesive layer, a reinforcing layer, and an adhesive layer. The mass ratio per unit area of ​​polyurethane foam composite layer and CMT reinforced composite layer is 14:13.

[0079] The air-permeable and sound-absorbing adhesive layer is a hot-melt adhesive film with holes, and the surface density is 30g / m 2 . The polyurethane foam sound-absorbing layer is lightweight polyurethane foam with a bulk density of 25kg / m 3 , The opening rate is 96%.

[0080] Th...

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Abstract

The invention discloses a high sound-absorbing CMT reinforced polyurethane foam composite material for vehicles. The composite material structure from top to bottom is: polyurethane foam composite layer, which includes a hydrophobic and oil-repellent layer, a breathable sound-absorbing bonding layer, and a polyurethane foam sound-absorbing layer; CMT reinforced composite layer, which includes a bonding layer, a reinforcing layer, and a bonding layer. . Aiming at the phenomenon that the polyurethane foam composite material has high open porosity and poor mechanical properties, and is often used in the interior material of automobile ceilings, the present invention uses the CMT material with high strength and high modulus as its surface reinforcement layer, and through the polyurethane foam The combined effect of the foam composite layer and the CMT reinforced composite layer improves the mechanical properties of the material under the premise of ensuring high sound absorption, heat resistance and good dimensional stability of the material, and can be used in automotive underbody protection materials.

Description

technical field [0001] The invention relates to the field of composite materials for automobile bottom protection, in particular to a high sound-absorbing CMT reinforced polyurethane foam composite material for automobiles. Background technique [0002] The car bottom guard is mainly used to protect the engine and the chassis. The bottom guard can prevent the water and dust on the road from entering the engine compartment, and prevent the hard sand and stones rolled up by the tires from hitting the engine and the uneven road surface and Scratches against the engine by hard objects. In addition, the loading of the car bottom guard can effectively reduce the noise of the engine during driving, thereby improving the comfort of the car. [0003] Since the 1970s, modern multifunctional composite materials with polyurethane foam as the main sound-absorbing material have been developed at home and abroad, and most of the current public documents have applied for patent protection....

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B32B7/12B32B27/40B32B27/06B32B17/02B32B17/10B32B33/00B32B9/00B32B9/04B32B9/02C09J7/29C08G18/48C08J9/08C08G101/00
Inventor 吕超目周立朱艳妍马国维方晶楼娣赵程波花东龙曹安东
Owner 浙江华江科技股份有限公司
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