Activated carbon-EVA composite emulsion coated polypropylene-based non-woven sound absorbing material for automobile interior decoration

Abstract

The invention relates to a non-woven sound absorbing material and in particular relates to an activated carbon-EVA composite emulsion coated polypropylene-based non-woven sound absorbing material for automobile interior decoration. The material is prepared from the following raw materials in parts by weight: 20-24 parts of polypropylene, 10-14 parts of polyurethane, 0.2-0.3 part of an antioxidant DLTP, 5-8 parts of mineral cotton fibers, 0.5-0.8 part of activated carbon micro powder with the granularity being 400-600 meshes, 1-2 parts of rosin, 1-2 parts of silicone oil, 14-18 parts of tetrapod-like zinc oxide whiskers, 0.1-0.2 part of ammonium polyphosphate, 10-12 parts of EVA emulsion with the solid content being 10-12 percent and 1-2 parts of aids. The surface of fiber yarns formed by performing melt-blowing on modified polypropylene-based master batch is coated by the EVA composite emulsion, the prepared material has the advantages of the traditional polypropylene non-woven material, the mechanical property is improved, the scour and wear resistance, fiber yarn strength and specific surface area are improved, the sound absorption and noise reduction effects are obvious, the odor in an automobile can be eliminated, and the material is fireproof, flame-retardant, light, environmentally friendly, tough and tight and is a novel and practical sound absorbing material for vehicles.

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 activated carbon-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.