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A kind of high damping composite board

A composite board, high damping technology, applied in the field of vibration reduction, can solve the problems of poor flame retardancy, low damping efficiency, wide temperature, narrow frequency bandwidth, etc. Good noise reduction effect

Active Publication Date: 2018-09-25
西安立远新材料科技开发有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Most of the damping materials used in the aviation industry in the market today are asphalt rubber-type damping materials. Due to the limitation of the material's own characteristics, this type of damping material itself is easy to volatilize toxic and harmful substances, has poor flame retardancy, and low damping efficiency (usually only 20%) , wide temperature range and narrow bandwidth range

Method used

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  • A kind of high damping composite board

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] The damping layer of this embodiment 1 is made by mixing 35% polymer resin, 45% graphite and 20% filler; wherein, the above polymer resin includes 30% polyurethane and 70% polyvinyl chloride, and the filler includes 25% % aluminum powder and 75% silica.

[0025] The damping layer of this embodiment is obtained by kneading the polyurethane material, polyvinyl chloride, graphite, aluminum powder and silicon dioxide in the above formula in a kneader. Wherein, the paddle speed of the kneader is 65 rpm, and the kneading time is 8 minutes.

[0026] A kind of high damping composite board of the present embodiment, specifically as figure 1 As shown, in the high-damping composite panel of this embodiment, two damping layers are superimposed on one side of the constraining layer 1, namely the first damping layer 2 and the second damping layer 21; and the thickness of the damping layer is 0.5mm. The constrained layer 1, the first damping layer 2 and the second damping layer 21 a...

Embodiment 2

[0030] In Example 2 of the present invention, on the basis of the high damping composite plate structure in Example 1, the thickness of the constrained layer 1 is set to 0.2 mm, the thickness of the damping layer is set to 0.6 mm, and the thickness between the constrained layer 1 and the first damping layer 2 The thickness of the acrylic resin film layer 3 is 0.1 mm, the thickness of the acrylic resin film layer 3 between the first damping layer 2 and the second damping layer 21 is 0.2 mm, and the thickness of the bottom organic adhesive layer 31 is 0.3 mm.

[0031] The components and preparation method of the damping layer in Example 2 are the same as those in Example 1.

Embodiment 3

[0033] Embodiment 3 of the present invention changes the composition of its damping layer on the basis of the high damping composite plate structure of Embodiment 1; the damping layer of this embodiment is made of 40% polymer resin, 30% graphite and 30% It is prepared by mixing fillers; wherein, the polymer resin includes 25% polyurethane and 75% polyvinyl chloride, and the filler includes 40% aluminum powder and 60% silicon dioxide.

[0034] The damping layer of this embodiment is obtained by kneading the polyurethane material, polyvinyl chloride, graphite, aluminum powder and silicon dioxide in the above formula in a kneader. Wherein, the paddle speed of the kneader is 80 rpm, and the kneading time is 10 minutes.

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Abstract

The invention provides a high damping composite plate. The composite plate comprises a restraint layer and damping layers. Multiple damping layers are laminated and adhered on one surface of the restraint layer. The provided high damping composite plate is a novel whole resin system dedicatedly developed for the aviation industry, does not contain any asphalt or harmful volatile, is flame retardant, has the advantages of wide frequency range and wide temperature range, and solves the problems that conventional damping plates in the aviation industry are not environment-friendly, and the damping efficiency is low.

Description

technical field [0001] The invention relates to the technical field of vibration reduction, in particular to a high-damping composite plate. Background technique [0002] Damping materials refer to a class of materials that can significantly consume vibration energy through friction between internal molecules during vibration. They are mainly viscoelastic polymer materials. This type of material has both viscous and elastic characteristics, that is, it has relatively High material loss factor and high elastic modulus; using this characteristic to make them into specific free layer or constrained layer components, pasting them on the vibrating structure can significantly dissipate the vibration energy of the structure and reduce the structural vibration role. Especially for siding structures, vibration reduction can also play a good role in noise reduction. This damping material is widely used in vibration and noise reduction in aerospace, ships, underwater structures, etc....

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B32B27/30B32B7/10B32B15/082B32B9/04B32B27/08C08L27/06C08L75/04C08K3/04C08K3/08C08K3/36
CPCB32B7/10B32B9/041B32B15/082B32B27/08B32B27/304B32B27/308B32B2307/10B32B2307/306B32B2307/3065B32B2307/56C08L27/06C08L75/04C08K3/04C08K2003/0812C08K3/36
Inventor 李镇云袁振宇
Owner 西安立远新材料科技开发有限公司
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