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Multilayer composite sound-insulating material

A sound insulation material, multi-layer composite technology, applied in layered products, rubber layered products, chemical instruments and methods, etc., can solve the problems of poor interface bonding, increased material weight, insufficient compactness, etc., and achieve good sound absorption effect. , Improve the effect of sound insulation

Inactive Publication Date: 2016-08-31
LIUZHOU SHENTONG AUTOMOBILE TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

With the development of the automobile industry, the requirements for sound insulation performance, heat resistance and mechanical properties of sound insulation materials are getting higher and higher, and it is becoming more and more difficult for previous materials to meet the requirements
[0003] The combination of various thermoplastic resin molecules in the sound insulation layer of the traditional formula automobile sound insulation material is not tight enough, and the interface between the thermoplastic resin and the filler is poorly bonded, not dense enough, and it is difficult to achieve the ideal sound insulation effect, and due to the addition of a large amount of inorganic fillers , which increases the weight of materials, which deviates from the trend of lightweight vehicles

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Mix 1 part of aminopropyltriethoxysilane, 2 parts of tetraacicular zinc oxide whiskers and 30 parts of vermiculite powder by mass fraction, wherein the particle size of vermiculite powder is 10 mesh, and the apparent appearance of tetraacicular zinc oxide whiskers Density is 0.1 g / cm 3 ; Then add 55 parts of nitrile rubber, 1 part of stearoyl peroxide and 0.5 part of 2,6-tertiary butyl-4-methylphenol, and mix well; then extrude and granulate with a screw extruder , the working temperature of the extruder is maintained at 80°C; then the above-mentioned pellets are placed on a vulcanizer with a mold to make a diaphragm; finally, the diaphragm is vacuum hot-pressed for 25min at a temperature of 130°C and a vacuum degree of -0.1MPa , to make a 6mm thick sound-insulating sheet; the sheet is used as the two-side surface layer and the middle layer of ramie greige cloth to be bonded with glue to obtain a three-layer composite sound-insulating material. After testing, the sound...

Embodiment 2

[0021] Mix 2 parts of vinyltriethoxysilane, 3 parts of tetraacicular zinc oxide whiskers and 35 parts of vermiculite powder by mass fraction, wherein the particle size of vermiculite powder is 20 orders, and the apparent density of tetraacicular zinc oxide whiskers 0.2 g / cm 3 ; Then add 60 parts of nitrile rubber, 1 part of p-chlorobenzoyl peroxide and 0.5 part of 2,6-tertiary butyl-4-methylphenol, and mix well; then extrude with a screw extruder , granulation, the working temperature of the extruder is maintained at 90°C; then the above-mentioned pellets are placed on a vulcanizer with a mold to make a diaphragm; finally, the diaphragm is vacuumed at a temperature of 140°C and a vacuum degree of -0.1MPa Hot pressing for 20 minutes to make a 6mm thick sound-insulating sheet; use the sheet as both side layers and the middle layer of ramie greige cloth with glue to obtain a three-layer composite sound-insulating material. After testing, the sound insulation of the three-layer c...

Embodiment 3

[0023] Mix 2 parts of ethylenediaminepropylmethyldimethoxysilane, 5 parts of tetraacicular zinc oxide whiskers and 40 parts of vermiculite powder according to mass fraction, wherein the particle size of vermiculite powder is 30 mesh, tetraacicular zinc oxide crystals The apparent density of whiskers is 0.3 g / cm 3 Add 65 parts of nitrile rubber, 2 parts of dicumyl peroxide and 1 part of 2,6-tertiary butyl-4-methylphenol, and mix well; then extrude with a screw extruder, making The working temperature of the extruder is maintained at 100°C; then the above-mentioned pellets are placed on a vulcanizing machine with a mold to make a diaphragm; finally, the diaphragm is vacuum hot-pressed at a temperature of 150°C and a vacuum of -0.1MPa After 15 minutes, a 6mm thick sound-insulating sheet was made; the sheet was used as both side layers and the middle layer of ramie greige was glued together to obtain a three-layer composite sound-insulating material. After testing, the sound insu...

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Abstract

The invention relates to automobile sound-insulating materials, in particular to a multilayer composite sound-insulating material, comprising three layers, the middle layer being ramie base cloth and two side layers being butadiene-acrylonitrile rubber layers; the two side layer are pasted to the middle layer through a binder, and tetrapod-like zinc oxide whiskers, vermiculite powder, a coupling agent, a crosslinking agent and an antioxidant; each side layer is made from according to parts by weight: 55-65 parts of butadiene-acrylonitrile rubber, 2-5 parts of tetrapod-like zinc oxide whiskers, 30-40 parts of vermiculite powder, 1-2 parts of a coupling agent, 1-2 parts of a crosslinking agent, and 0.5-1 part of an antioxidant. The sound-insulating material can be imparted good sound-absorbing effect by using butadiene-acrylonitrile rubber and using vermiculite powder and tetrapod-like zinc oxide whiskers as a filler; meanwhile, sound-insulating effect is greatly improved by using the middle layer of ramie base cloth and the two side layers of butadiene-acrylonitrile rubber.

Description

technical field [0001] The present invention relates to soundproof materials for automobiles. Background technique [0002] With the progress of mankind and the development of science, noise pollution has become a problem that cannot be ignored. Absorbing noise and reducing noise pollution are important issues related to the coordinated development of human society. With the deepening of research, various materials for absorbing sound waves are produced. The principle of sound insulation is to use when the sound wave passes through a certain object, the object can absorb, reflect and weaken, so as to block the sound wave from continuing to propagate, so as to achieve the effect of sound insulation. With the development of the automobile industry, the requirements for sound insulation performance, heat resistance, and mechanical properties of sound insulation materials are getting higher and higher, and it is becoming more and more difficult for conventional materials to me...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B32B9/02B32B9/04B32B25/14C08L9/02C08K13/04C08K7/08C08K3/34C08K5/14C08K5/13C08K5/544C08K5/5425
CPCB32B25/10B32B25/14B32B2262/06C08K3/34C08K5/13C08K5/14C08K5/5425C08K5/544C08K7/08C08K13/04C08K2201/003C08L2201/08C08L9/02
Inventor 钟静清韦晗
Owner LIUZHOU SHENTONG AUTOMOBILE TECH CO LTD