Elastic flame-retardant EVA emulsion coated polypropylene-based nonwoven sound-absorbing material applied to automotive interiors

Abstract

The invention relates to a nonwoven sound-absorbing material, in particular to an elastic flame-retardant EVA emulsion coated polypropylene-based nonwoven sound-absorbing material applied to automotive interiors. The material is prepared from the following raw materials in parts by weight: 10-15 parts of poly-1-butene, 20-25 parts of 325-400-mesh expanded perlite, 2-3 parts of rosin, 5-8 parts of polycaprolactam, 0.5-0.8 part of a silane coupling agent, 20-24 parts of polypropylene, 12-15 parts of an EVA emulsion with the solid content of 10-12%, 0.5-0.8 part of nano spherical ferroferric oxide powder, 0.1-0.2 part of an anti-oxidant 168, 0.4-0.6 part of ammonium polyphosphate and 1-2 parts of an additive. The sound-absorbing material provided by the invention is high in raw material utilization rate, light, environment-friendly, flexible and compact, and free of pollution to the automotive interior environment; the sound-absorbing material is a novel and practical automotive sound-absorbing material.

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 elastic flame-retardant EVA 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-based ...

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.