Sound-absorbing composite structure

Abstract

The invention provides a sound absorption and insulation composite material structure composed by closely bonding at least one non woven fiber layer and at least one polyethylene film. Specifically, the non woven fiber layer is a fiber stack layer prepared from a recycled and environment friendly fiber material by a non woven technological process, and has thickness equal to or greater than 1mm. And the thickness of the polyethylene film is in the range of 0.009mm-0.1mm.

Description

【Technical Field】 [0001] The present invention relates to a sound-absorbing and sound-absorbing composite material structure, in particular to a composite material made of recycled environmentally friendly fiber material composed of at least one non-woven (NonWoven) fiber layer and at least one polyethylene film, which can have excellent performance Sound-absorbing effect. 【Background technique】 [0002] In the general daily life environment, there will be many places where good sound absorption and / or sound insulation effects must be used. The most common thing is that in high-class cars, for the sake of comfort and good sound effects, materials with good sound absorption and sound insulation effects must be used to insulate and absorb the external mid-high frequency noise, as well as the vehicle itself. Low frequency noise and resonance. If the sound absorption and sound insulation effect is not good, it is difficult to show the sense of value of a luxury car. Therefore, it i...

AI Technical Summary

Problems solved by technology

Therefore, the absorption of middle and low frequency sound waves cannot be achieved only by relying on the attenuation mechanism of sound waves injected into the sound-absorbing material, which is often half the effort

[0006] The inventor of the present invention has been engaged in the research, development and manufacture of various non-woven materials for many years. He has profound experience in various manufacturing methods of non-woven fabrics, and knows that non-woven fabrics are widely used, and people have been trying to use non-woven fabrics from the material formula and manufacturing methods. Sound-absorbing and insulating materials with good effects have been found, but so far no satisfactory results have appeared.

Images