Sound-absorbing sound-insulating composite material for automobiles

Abstract

The invention discloses a sound-absorbing sound-insulating composite material for automobiles, consisting of the following raw materials in parts by weight: 6-10 parts of ethylene propylene diene monomer rubber, 6-8 parts of magnesium oxide, 6-9 parts of glass fiber cotton, 0.2-0.6 part of foaming adhesive, 40-50 parts of gypsum mortar, 20-30 parts of diatom mud, 16-20 parts of wood fiber, 3-5 parts of carboxymethyl cellulose, 1-3 parts of stabilizer, 5-9 parts of foaming agent, 14-18 parts of water, 0.5-12 parts of copper oxinate, 15-25 parts of PVC resin, 2-4 parts of n-butanol, 1-3 parts ofcoalescing aid, 1-3 parts of wetting agent, 7-9 parts of zinc oxide, 1-3 parts of calcium carbonate, 4-6 parts of benzoic acid, and 6-10 parts of natural double salt. The sound-absorbing sound-insulating composite material for automobiles of the invention is improved in corrosion resistance; sound energy is gradually attenuated, so that the purpose of sound absorption is achieved, and the porouscharacteristic is used to realize sound absorption and noise reduction; and with addition of diatom mud, toxic volatile organic compounds on the surface of the composite sound-absorbing material are greatly reduced, the environmental friendliness is enhanced, the sound insulation effect is excellent, and the use prospect is better.

Description

technical field [0001] The invention relates to the field of chemical materials, in particular to a sound-absorbing and sound-insulating composite material for automobiles. Background technique [0002] All materials that can be used to block noise are collectively referred to as sound insulation materials. Sound insulation refers to the isolation, isolation, separation, etc. of sound or noise through certain objects. Therefore, sound insulation materials are needed. The number of decibels related to the transmitted sound energy is the sound insulation of the material. [0003] However, the existing sound-absorbing and sound-insulating composite materials for automobiles have poor sound insulation and sound-absorbing effects, and at the same time, traditional materials do not have the effect of environmental protection. Therefore, we propose sound-absorbing and sound-insulating composite materials for automobiles. Contents of the invention [0004] The object of the prese...

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Problems solved by technology

[0003] However, the existing sound-absorbing and sound-insulating composite materials for automobiles have poor sound insulation and sound-absorbing effects, and traditional materials do not have the effect of environmental protection. Therefore, we propose sound-absorbing and sound-insulating composite materials for automobiles