Preparation method of composite sound-absorbing material for automotive interior parts

Abstract

The invention discloses a preparation method for a composite sound-absorbing material of an automotive interior trim part, and relates to the technical field of processing of automotive interior trimparts. According to the invention, a soundproofing mat is composed of two layers of soundproofing cotton felts; and the preparation method comprises the following steps: regenerated polyester fiber / polypropylene fiber spinning, hot press molding of a composite felt, premolding of a glass fiber mesh with a steam mold, cooling and molding, water cutting, and packaging and warehousing. The compositesound-absorbing material provided by the invention is prepared by compounding a plurality of layers of a sound-absorbing material, comprises six layers, and has good sound-absorbing effect and compactness and excellent aesthetic properties. The preparation method provided by the invention uses the regenerated polyester fiber and frequently-used polypropylene fiber as raw materials; a fiber composite sheet material applied to automotive interior trim parts is prepared by adopting a method provided by the invention; the regenerated polyester short fiber is a reinforcing body, and the polypropylene fiber is a matrix, so the effects of binding and reinforcing are exerted; and the composite felt prepared by strictly controlling parameters like temperature, time and pressure of a hot press molding machine has excellent mechanical properties.

Description

technical field [0001] The invention relates to the technical field of processing automobile interior parts, in particular to a preparation method of a composite sound-absorbing material for automobile interior parts. Background technique [0002] At present, the size of the car noise has reflected the quality and technical performance of the car. The more advanced the car is, the more the noise and vibration of the car must be transmitted to the passenger compartment as little as possible, which is often said in terminology to match the NVH performance of the whole car. NVH is a comprehensive issue to measure the quality of automobile manufacturing. It also gives the most intuitive feeling to automobile users and is an important part of automobile design and manufacturing. [0003] There are many sources of car noise, such as engines, gearboxes, drive axles, drive shafts, compartments, glass windows, tires, relays, horns, stereos, etc., and these parts will generate noise ...

AI Technical Summary

Problems solved by technology

However, many mechanical properties of the existing composite panels for automotive interiors are still insufficient, especially the polyester fiber / polypropylene fiber composite materials that are widely used now, and their sound insulation, heat insulation and mechanical properties need to be improved.

[0006] Chinese patent application number 201210478186.2 discloses a PET fiber / polyacrylonitrile fiber composite sound-absorbing cotton, which is made of the following raw materials in parts by weight: PET fiber 70-80, polyacrylonitrile fiber 40-50, emulsifier OP-20 10 -15, Pingpingjia O-15 5-10, PP 80-100, SEBS 30-40, calcined clay 15-20, modified diatomite 10-15, stearic acid 2-3, diisophthalic acid Octyl ester 5-8, tricresyl phosphate 4-6, polyethylene wax 2-3, vinyl tris (β-methoxyethoxy) silane 1-2, calcium stearate 2-3, dimethyl Isooctyl tin dimercaptoacetate 1-2, antioxidant ODA 0.5-1.5, antioxidant 1035 1-2, although the sound-absorbing cotton prepared by this method has a certain flame-retardant and sound-absorbing effect, but in the production process due to A large number of organic polymer materials are used, resulting in heavy odor and polluting the environment

However, the material cost of this kind of ceiling material is high, and the tensile breaking strength is insufficient.