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Damping material

A technology of vibration-damping materials and vibrating bodies, which is applied in the field of vibration-damping materials and can solve problems such as insufficient lightness and insufficient lightness of vibration-damping plates

Inactive Publication Date: 2009-01-28
SEKISUI CHEM CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Since the vibration damping plate contains inorganic powdery objects inside, the vibration energy is converted into heat loss, so the specific gravity is 1g / cm 3 The above has the problem of insufficient lightness
[0005] In addition, in addition to the above-mentioned damping plate, the vibration of the vibrating body is attenuated by pasting a heavy-weight damping plate on the vibrating object (hereinafter also referred to as "vibrating body"), but the lightness of the damping plate is also insufficient. The problem

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0073]Mix the following ingredients uniformly and then filter to produce adhesive latex, water-acrylic adhesive latex [DAINIPPON INK AND CHEMICALS (INCORPORATED) product name: ボンコ一ト350 (VONCOAT 350) Acrylic adhesive component (resin component): 50% by weight] 90 parts by weight, water-urethane adhesive latex [manufactured by DAINIPPON INK AND CHEMICALS, INCORPORATED) Trade name: Hardran HW-930 ( HYDRAN HW-930), polyurethane adhesive component (resin component): 50% by weight] 10 parts by weight, epoxy crosslinking agent (DAINIPPON INK AND CHEMICALS, INCORPORATED) product trade name: CR -5L) 3 parts by weight, ammonium chloride foaming agent (manufactured by Dainippon Chemicals (DAINIPPON INK AND CHEMICALS, INCORPORATED) trade name: F-1) 5 parts by weight, polysiloxane foam stabilizer (Dainippon (DAINIPPON INK AND CHEMICALS, INCORPORATED) trade name: Boncoat NBA-1 (VONCOATNBA-1) 0.5 parts by weight and carboxymethyl cellulose aqueous solution (DAICEL CHEMICAL INDUSTRIES, LTD.) , 4%...

Embodiment 2

[0079] Use 21 parts by weight of azoformamide instead of 14 parts by weight, use 2.6mm instead of 1.3mm for the thickness of the foamable resin plate, and use acceleration voltages of 500kV and 3.8Mrad instead of acceleration voltages of 800kV and 2.4Mrad to irradiate electrons on both sides of the foamable resin plate. Except for radiation, the same procedure as in Example 1 was used to obtain a thermoplastic resin foamed board. Among them, the thickness of the thermoplastic resin foam board is 8.6mm and the density is 0.033g / cm 3 . The Young's modulus of the thermoplastic resin foam board was 1.40 MPa. Furthermore, on one side of the above-mentioned thermoplastic resin foam board, the foamed adhesive layer prepared in the same manner as in Example 1 was laminated and integrated by the same method as in Example 1 to obtain a vibration damping material with a thickness of 10.5 mm. .

Embodiment 3

[0081] The following components were supplied to an extruder, melted and kneaded, and extruded to obtain a foamable resin board with a thickness of 1.2 mm. Polypropylene resin composed of ethylene-propylene random copolymer (product name of Chisso Corporation (Chisso Corporation): XK0235) 45 parts by weight and 15 parts by weight of isotactic polypropylene (product name of Idemitsu Corporation: SH152), straight chain Low-density polyethylene (made by Idemitsu Co., Ltd., trade name: 0238CN) 40 parts by weight, 6.8 parts by weight of azoformamide, crosslinking agent (made by Kyoei Chemical Co., Ltd. trade name: TND-23H), 3 parts by weight, antioxidant A ( Product name manufactured by Asahi Denka: ADEKASTAB AO-60 (ADEKASTAB AO-60)) 1 part by weight, antioxidant B (product name manufactured by Asahi Denka: ADEKASTAB CDA-1 (ADEKASTAB CDA-1)) 0.5 part by weight and antioxidant C (trade name of Ouchi Shinko Chemical Co., Ltd.: ノクラツク400S (NOCRAC400S)) 0.5 parts by weight.

[0082] Electro...

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Abstract

A damping material having excellent damping and lightweight characteristics, especially a damping material that can find suitable application in automobile uses wherein light weight is demanded. There is provided a damping material characterized in that a foam adhesive layer is superimposed on one major surface of a thermoplastic resin foam sheet and unified. Thus, the damping material exerts excellent damping property such that any vibrational energy conveyed to the damping material is smoothly absorbed by a synergistic effect of rigidity of the thermoplastic resin foam sheet with viscoelasticity of the foam adhesive layer. Moreover, this damping material excels in weight saving, so that it can find suitable application in uses wherein light weight is demanded, for example, uses for vehicles such as automobiles and railways and due to light weight, excels in workability.

Description

Technical field [0001] The present invention relates to a damping material with excellent damping properties and light weight. Background technique [0002] In the past, damping materials have been used in electrical products to reduce the vibration of driving devices such as motors. In addition, in construction applications, vibration damping materials are used to reduce the rain sound of folding roofs, etc.; in automobile applications, to reduce the vibration sound or engine generated by the micro-vibration of the ceiling or door due to the vibration generated during driving. Vibration damping materials are used to drive the vibration of the system. [0003] As the damping material, Patent Document 1 proposes a damping plate for a folding roof. The damping plate for a folding roof is based on a damping plate made of rubber, thermoplastic elastomer, thermoplastic resin, and inorganic powder. It is formed by stacking a polyethylene terephthalate resin layer on one surface of the ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16F15/02
Inventor 山田穰二井上智弘足立浩一
Owner SEKISUI CHEM CO LTD
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