Foaming modified automotive interior material with improved sound absorption effect and preparation method of foam modified automotive interior material

Abstract

The invention discloses a foaming modified automotive interior material with an improved sound absorption effect. The foaming modified automotive interior material is prepared from raw materials in parts by weight as follows: 100-103 parts of polylactic acid, 3.5-4 parts of nano antimony trioxide, 10-11 parts of decabromodiphenyl ethane, 25-27 parts of SEBS (styrene-ethylene-butylene-styrene block copolymers), 60-62 parts of kenaf fibers, 3-4 parts of shell micropowder, 8-9 parts of bamboo shoot shells, 4-5 parts of corn starch, 3-4 parts of gelatin, 2-3 parts of guar gum, 11-12.5 parts of sodium hydroxide with the concentration being 10%, 2-3 parts of azodiisobutyronitrile, 0.5-0.6 parts of a crosslinking agent DBHP and an appropriate amount of water. Dipping slurry is prepared from the bamboo shoot shells, the corn starch, the shell micropowder and the like through a series of treatment, mixed fibers are soaked in the dipping slurry for microcellular foaming, and porous structures are formed on the surfaces of the fibers, so that the prepared material has excellent sound absorption and thermal insulation effects, an automobile prepared from the material has excellent noise reduction efficacy, and noise pollution is reduced.

Description

technical field [0001] The invention relates to the technical field of automotive interior materials, in particular to an automotive interior material with enhanced foaming and modified sound-absorbing effects and a preparation method thereof. Background technique [0002] The interior parts of a car generally refer to parts and materials such as partitions, door trim panels, instrument panel assemblies, armrests, and carpets in the car compartment. Compared with other parts on the car, they have little effect on the running performance of the car, but their face can be seen at a glance, representing the image of the whole car, which one is better, determines the reputation and grade of the car, and determines the choice of people. car intent. In addition, for cars, although the interior parts are only some auxiliary parts, they have to undertake functions such as vibration reduction, heat insulation, sound absorption and sound insulation, which play a very important role i...

AI Technical Summary

Problems solved by technology

However, due to the slow crystallization rate of polylactic acid resin, large shrinkage rate of molded products, brittleness, poor thermal stability during processing, and poor durability of products, its application as engineering plastics is limited.