Automotive graphene EVA (ethylene vinyl acetate copolymer) high-foam sound-insulation material and method for preparing same

Abstract

The invention relates to a method for preparing an automotive sound-insulation material, and mainly relates to a high-performance foam damping material and a method for preparing the same. Graphene is used as a filler for the high-performance foam damping material. The method includes preparation procedures of mixing ethylene-vinyl acetate resin, fumed silica, filling agents, the functionalized graphene and plasticizers with one another in an internal mixer at the mixing temperature of 85 DEG C and the rotational speed of 30 revolutions / min for 5-10min to obtain mixed compounds; adding foaming agents, foaming agent accelerators and peroxide cross-linking agents into the mixed compounds to continue mixing at the mixing temperature of 85 DEG C and the rotational speed of 30 revolutions / min for 5-10min; discharging slices of the mixed compounds. The high-performance foam damping material and the method have the main technical advantages that the functionalized graphene and polymer matrixes are excellent in solubility, energy can be effectively dissipated under the effect of friction loss owing to interface slip between the functionalized graphene and the polymer matrixes, and accordingly noise pollution in automobiles can be effectively reduced.

Description

technical field [0001] The patent of the present invention relates to a preparation method of an automobile sound insulation material, and mainly relates to a high-performance foaming damping material with graphene as a filler and a preparation method thereof. Background technique [0002] How to reduce the noise inside the car is the goal of the automobile manufacturing industry. When the car is welded, there will be a large gap between the sheet metal and the sheet metal, such as the door, the pillar, etc., which will easily cause noise when the car is running. , it is necessary to seal and block noise; at present, the materials used in automobiles are mainly high-foaming rubber-plastic materials with multi-layer composite structures. Different, in the foaming process, they will restrict each other, affect the foaming ratio, and the phenomenon of peeling between layers will occur, so that the gaps cannot be filled, affecting the overall sound insulation effect and reducing...

AI Technical Summary

Problems solved by technology

[0002] How to reduce the noise inside the car is the goal of the automobile manufacturing industry. When the car is welded, there will be a large gap between the sheet metal and the sheet metal, such as the door, the pillar, etc., which will easily cause noise when the car is running. , it is necessary to seal and block noise; at present, the materials used in automobiles are mainly high-foaming rubber-plastic materials with multi-layer composite structures. Different, in the foaming process, they will restrict each other, affect the foaming ratio, and peel off between layers, so that the gaps cannot be filled, affect the overall sound insulation effect, and reduce product performance

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