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| Laminated rubber vibration control device for structures |
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| Adjustable door frame assembly |
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| Nuclear reactor including a reactor vessel and technique for supporting the latter |
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| Sealed basket for boiling water reactor fuel assemblies |
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Vibration damper material comprising a vicso elastic layer of unvulcanized rubber
| Details |
Inventors: Okuda, Takuya; Sugizaki, Toshio; Kogure, Masao; Saitoh, Takanori;
Assignee: Lintec Corporation (JP)
Primary Examiner: Le; H. Thi
Assistant Examiner:
Attorney, Agent or Firm: Brinks Hofer Gilson & Lione, Nichols; G. Peter
The vibration damper material comprises a laminate of a viscoelastic layer and a hardenable pressure sensitive adhesive layer, and a release liner applied onto the hardenable pressure sensitive adhesive layer. The viscoelastic layer is intended to form a vibration damping layer, and contains a viscoelastic material mainly comprised of unvulcanized rubber to which a vulcanizing agent (crosslinking agent) has been added. The hardenable pressure sensitive adhesive layer comprises a hardenable pressure sensitive adhesive which has adhesive properties in the uncured state but has a strong adhesive strength when it is cured by heating, irradiation with light or by being blocked from air for example. This hardenable pressure sensitive adhesive layer contains a sticking polymer, a reactive oligomer and a polymerization initiator. The release liner which is utilized has a silicone layer formed on the surface of a base material thereof. This vibration damper material has an excellent ability to follow curved surfaces, a reliable adhesivity, and provides a high degree of vibration damping property without impairing the efficiency in the operation in which the vibration damper material is applied onto an adherend. |
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DETAILED DESCRIPTION In view of the above-described problems, the object of the present invention is to provide a vibration damper material which exhibits good vibration damping properties and has an excellent ability to follow curved surfaces and excellent adhesive reliability without reducing the operational efficiency when it is applied to the adherend.
In order to achieve this objective, the vibration damper material, according to the present invention, comprises a viscoelastic layer containing an unvulcanized rubber as its main composition and a vulcanizing agent therein, a hardenable pressure sensitive adhesive layer, and a release liner stuck onto the hardenable pressure sensitive adhesive layer.
Since vibration damper materials having the above structure are highly flexible and can be bend easily, they exhibit an excellent ability to follow an adherend having curved surfaces and an excellent operational efficiency when it is applied onto the adherend, and, in particular, it exhibits these advantageous effects to a sufficient degree even when the curved surface has a large radius of curvature.
In addition, by vulcanizing the viscoelastic layer after the vibration damper material of the present invention has been stuck to the adherend, it is possible to obtain an excellent vibration damping effect and noise-absorbing effect for the adherend.
Further, by curing the hardenable pressure sensitive adhesive layer, it is also possible to obtain a strong adhesive strength, thus leading to a high bonding reliability.
In the present invention, it is preferred that the vibration damper material is further comprised of a barrier layer provided between the viscoelastic layer and the hardenable pressure sensitive adhesive layer for preventing migration of organic components.
It is also preferred that the unvulcanized rubber of the viscoelastic layer has a rubber viscosity of 10 to 80 (JIS K-6300 Rotor L Model Mooney viscometer ML.
sub.
1+4 (100.
degree.
C.
)) before vulcanization.
It is also preferred that the viscoelastic layer has a modulus of dynamic shearing elasticity of 1
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