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Acoustic insulation and absorption felt and production method thereof

A production method and technology for sound-absorbing felt, applied in the field of sound-absorbing sound-absorbing felt, can solve the problems of no sound absorption, poor stability, large shrinkage, etc., and achieve the effects of low thermal conductivity, low cost, and improved sound insulation function.

Inactive Publication Date: 2011-01-05
怡星(无锡)汽车内饰件有限公司
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Problems solved by technology

However, the foamed EVA and its solid products in this structure are all low-toxicity foam plastics, and the gases produced are mainly nitrogen and CO, with a small amount of CO 2 , and this material shrinks greatly, and its shape stability is poor at high temperatures. The effect of sound absorption

Method used

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  • Acoustic insulation and absorption felt and production method thereof

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Embodiment Construction

[0019] The specific embodiments of the present invention will be further described below in conjunction with the accompanying drawings.

[0020] Such as figure 1 As shown, the present invention is a sound-insulating and sound-absorbing felt, comprising a surface layer 1 and a bottom layer 3, an adhesive layer 2 is arranged between the surface layer 1 and the bottom layer 3, and the materials of the surface layer 1 and the bottom layer 3 are modified polyester, The mixed fiber of waste cotton and polyester open wool, the surface layer 1 is a hard layer structure with dense and small gaps, the bottom layer 3 is a fluffy porous soft layer structure, and the material of the adhesive layer 2 is polyethylene, which is a film structure.

[0021] In the surface layer 1, the mass ratio of modified polyester, waste cotton and polyester open wool is (5-25): (15-45): (40-70); in the bottom layer 3, the modified The mass ratio of polyester, waste cotton and polyester opening wool is (20-5...

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Abstract

The invention relates to an acoustic insulation and absorption felt and a production method thereof. The acoustic insulation and absorption felt comprises a surface layer and a bottom layer, wherein, a bonding layer is arranged between the surface layer and the bottom layer; the surface layer and the bottom layer are both made from modified polyester, waste cotton and polyester opening wool blended fiber; the surface layer is of a compact small-clearance hard-layer structure, and the bottom layer is of a fluffy porous soft-layer structure; and the bonding layer is made from polyethylene and has a membrane structure. The production method comprises the following steps of preparing the surface layer and the bottom layer sequentially, and bonding the layers. In the invention, the surface layer and the bottom layer are made from the modified polyester, the waste cotton and the polyester opening wool blended fiber, thus having lower cost; the waste cotton and polyester opening wool are recycled fiber, thus playing a role of environmental protection; the surface layer is of the compact small-clearance hard-layer structure, thus having an acoustic insulation function; the bottom layer is of the fluffy porous soft-layer structure, thus achieving the purpose of acoustic absorption; and the polyethylene bonding layer is of the membrane structure, thereby further enhancing acoustic insulation function.

Description

technical field [0001] The invention relates to an automobile interior decoration, in particular to a sound-insulating and sound-absorbing felt and a production method thereof. Background technique [0002] Sound insulation and sound-absorbing felt is used as a partition between the instrument panel and the engine of the front wall of the car, which acts as a firewall. The original structure of the firewall is non-woven fabric on one side and EVA (Ethylene-Vinyl Acetate Copolymer ethylene-vinyl acetate copolymer) foam material on the other side, which plays the role of sound insulation and heat absorption. However, the foamed EVA and its solid products in this structure are all low-toxicity foam plastics, and the gases produced are mainly nitrogen and CO, with a small amount of CO 2 , and this material shrinks greatly, and its shape stability is poor at high temperatures. The effect of sound absorption. Contents of the invention [0003] Aiming at the above problems, th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B32B5/14B32B5/26B32B7/12B32B37/12B60R13/08
Inventor 邓红花
Owner 怡星(无锡)汽车内饰件有限公司
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