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Vibration damping sheet

A shock absorber and viscoelastic technology, which is applied in the field of shock absorbers, can solve the problems of increased weight of shock absorbers, insufficient adhesiveness of adherents, pollution, etc., to prevent vibration sound or noise, and improve shock absorption , the effect of simple operation

Inactive Publication Date: 2010-07-21
NITTO DENKO CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] However, if inorganic powder is contained in the rubber-based shock-absorbing layer, the weight of the shock-absorbing sheet may increase or it may not be possible to reduce the weight of the adherend attached to the shock-absorbing sheet.
[0008] In addition, although the shock-absorbing materials proposed in the above-mentioned Patent Documents 1 and 2 can achieve weight reduction, they have insufficient adhesiveness to adherends.
[0009] Furthermore, in the conventional rubber-based shock-absorbing layer, the overflow of the rubber-based shock-absorbing layer sometimes contaminates the outside of the sticking part or attaches to the hand of the sticking operator (secondary pollution), so great care must be taken. Operation of the shock absorber

Method used

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Examples

Experimental program
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Effect test

Embodiment 1

[0109] (Formation of viscoelastic layer)

[0110] In the monomer component mixed with 90 parts by weight of 2-ethylhexyl acrylate and 10 parts by weight of acrylic acid, Irgacure 651 (trade name, 2,2-dimethoxy-1,2-diphenylethane-1- Ketone, manufactured by Ciba Fine Chemicals Co., Ltd.) 0.05 parts by weight and Irgacure 184 (trade name, 1-hydroxy-cyclohexyl-phenyl ketone, manufactured by Ciba Fine Chemicals Co., Ltd.) 0.05 parts by weight, to prepare a monomer mixture. Then, the monomer mixture is irradiated with ultraviolet light (wavelength 300-400nm) with an illuminance of about 5mW until the viscosity of the monomer mixture (BH viscometer, No. 5 rotor, 10s -1 , The measurement temperature is 30°C) to be about 15 Pa·s to prepare a slurry made by polymerization of a part of the monomer mixture.

[0111] Next, 0.1 parts by weight of 1,6-hexanediol diacrylate was added to the slurry, and then hollow glass balls were added at a ratio of 30% by volume to the slurry (without 1,6-hexane...

Embodiment 2

[0124] Except having changed the thickness of the viscoelastic layer from 0.8 mm to 1.2 mm, a viscoelastic layer was formed in the same manner as in Example 1, and a shock absorbing sheet was produced.

Embodiment 3

[0126] Except that the thickness of the viscoelastic layer was changed from 0.8 mm to 2.0 mm, and the content ratio of the air cell in the viscoelastic layer was adjusted from 15% by volume to 8% by volume, the viscoelastic layer was formed in the same manner as in Example 1. Make a shock-absorbing film.

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Abstract

Disclosed is a vibration damping sheet (1) comprising a viscoelastic layer (2) containing a hollow inorganic fine particle, and a constraining layer (3) arranged on the viscoelastic layer (2).

Description

Technical field [0001] The present invention relates to a shock-absorbing sheet, in particular, the present invention relates to a shock-absorbing sheet used for pasting on adherends in various industries. Background technique [0002] As we all know, in the past, in the automobile industry, vibrations or noises were generated when the car was running or the doors were opened and closed. Therefore, in order to prevent these vibrations and noises from occurring, damping sheets were pasted on automobile steel plates. [0003] As such a shock absorbing sheet, a shock absorbing sheet provided with a rubber-based shock absorbing layer is known. In addition, it is also known that there is a shock absorbing sheet in which an inorganic powder is contained in a rubber-based shock absorbing layer in order to reduce vibration. [0004] Furthermore, as a shock absorbing sheet, a shock absorbing material in which a foam adhesive layer is laminated on an aluminum sheet or a polyester sheet has al...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16F15/02B32B7/02B32B25/02
CPCB32B27/12B32B17/04F16F9/306B32B27/30B32B15/08B32B7/02B32B27/18B32B15/18B32B15/20B32B27/36B32B2260/021B32B2260/046B32B2264/101B32B2264/102B32B2264/107B32B2307/56B32B2307/72B32B2605/00
Inventor 满冈由明藤井隆裕
Owner NITTO DENKO CORP