Foamed magnesium-EVA composite emulsion-coated polypropylene-based non-woven sound absorbing material for automotive trim

Abstract

The invention relates to a non-woven sound absorbing material, in particular to a foamed magnesium-EVA composite emulsion-coated polypropylene-based non-woven sound absorbing material for automotive trim. The foamed magnesium-EVA composite emulsion-coated polypropylene-based non-woven sound absorbing material for automotive trim is prepared from the following raw materials in parts by weight: 10-13 parts of PET fiber, 5-8 parts of magnesium oxide, 22-26 parts of polypropylene, 2-3 parts of rosin, 4-6 parts of alkyl ketene dimer, 3-5 parts of styrene-maleic anhydride copolymer, 0.1-0.2 part of an antioxidant 1076, 0.1-0.2 part of an antioxidant DLTP, 1-1.5 parts of foamed magnesium with the mesh of 325-400, 2-3 parts of a silane coupling agent, 15-18 parts of attapulgite pottery clay powder with the mesh of 325-400, 10-12 parts of an EVA emulsion with the solid content of 10-12% and 1-2 parts of an assistant. The prepared material has the advantages of traditional polypropylene non-woven materials, a porous material is embedded on the cellosilk surface, the damping, sound absorbing and noise reducing effects are more obvious, and the material is a novel and practical sound-absorbing material for automobiles.

Description

technical field [0001] The invention relates to a non-woven sound-absorbing material, in particular to a polypropylene-based non-woven sound-absorbing material coated with foamed magnesium-EVA composite emulsion for automobile interior decoration. Background technique [0002] Various dynamic noises will be generated in the car during the starting and running of the car. These noises are directly related to the comfort and hearing health of the passengers. Excessive noise may even interfere with the driver's attention and affect safe driving. To reduce the noise inside the car, it is particularly important to create a quiet and healthy driving and riding environment. To reduce the noise in the car mainly depends on the design and material of the car body itself and the sound-absorbing materials of the interior. Among them, designing high-quality sound insulation and noise reduction materials is the most common and efficient noise reduction method. [0003] Polypropylene-bas...

AI Technical Summary

Problems solved by technology

[0003] Polypropylene-based composite non-woven materials made by meltblown method have become a kind of sound-absorbing materials widely used in automotive interiors due to their ultra-fine fiber structure, simple and efficient production, non-toxic and harmless, etc. Most of these materials have loose structures , the smooth fiber outer layer reduces the specific surface area of ​​the material, which shortens the attenuation and conversion time of the sound wave in the material, and cannot achieve a satisfactory sound absorption effect. In actual use, the noise reduction effect is often improved by increasing the thickness of the material At the same time, the finished product has disadvantages such as easy deformation, poor resilience, easy to generate static electricity, and poor heat resistance.