Stock material or miscellaneous articles – Web or sheet containing structurally defined element or... – Composite having voids in a component
Patent
1986-06-27
1988-11-08
Ives, P. C.
Stock material or miscellaneous articles
Web or sheet containing structurally defined element or...
Composite having voids in a component
428327, 428465, 428463, 428467, 428484, 428492, 428497, 524271, 427422, B32B 336, C08L 2100, B05D 102
Patent
active
047833661
DESCRIPTION:
BRIEF SUMMARY
TECHNICAL FIELD
This invention concerns a shock absorbing material placed between two objects such as a fuel tank and a vehicle body and, more specifically, it relates to a shock absorbing material that can be applied without using an adhesive or bond, and a method of applying the same.
BACKGROUND ART
In a fuel tank for use in vehicles, for instance, a shock absorbing material 6 made of a vulcanized rubber shaping rpoduct, a mat-like non-woven fabric or the like has conventionally been appended at a portion of the surface of a fuel tank 4 by using an adhesive 5 or the like as shown in FIG. 2. Then, the fuel tank 4 is mounted, for example, to the floor back face 7 of a vehicle body by way of the shock absorbing material 6 being clamped by a metal belt or the like not illustrated.
In conventional shock absorbing materials, if the surface smoothness of an object to be buffered is poor, the area of contact with the shock absorbing material is decreased which tends to diminish the bonding strength. Further, the bonding strength of the adhesive may possibly be degraded with the passage of time, which may lead to the disadvantage that the shock absorbing material will become detached, coupled with the loosening of the metal belt due to the vibrations during running. Further, when using highly water absorbing materials such as non-woven fabrics for the shock absorbing material, water contained therein has been found to cause undesirable effects on the corrosion resistance of the vehicle body and the fuel tank.
The present invention has been achieved in view of the foregoing problems and it is an object thereof to provide a shock absorbing material which is capable of closely contacting two objects to be buffered and which is also excellent in various performances such as aging-resistant bondability, as well as to provide a method of effectively applying such a shock absorbing material.
DISCLOSURE OF THE INVENTION
The feature of the shock absorbing material according to this invention resides in a shock absorbing material which is placed between two objects, for example, between the surface of a vehicle body and the surface of a fuel tank for buffering the impact shocks resulting from vibrations or the like, wherein the shock absorbing material comprises from 10 to 60 parts by weight of a polymeric viscous material, from 10 to 50 parts by weight of a softening agent, from 10 to 60 parts by weight of a tackifier and from 0 to 65 parts by weight of elastomeric particles, and the shock absorbing material is a fused member joined to at least one surface of the two objects.
While the shock absorbing material according to this invention can be appended by way of an adhesive or bond as usual, it is preferred to increase the adhesiveness of the shock absorbing material by heating and to fuse the shock absorbing material directly at least to one and, desirably, to both surfaces of the two objects to be buffered. In view of the above, the composition of the shock absorbing material is defined as described below.
The polymeric viscous material in this invention constitutes a substrate of the shock absorbing material according to this invention, for which synthetic rubber such as styrene-butadiene rubber, butyl rubber, nitrile rubberand chloroprene rubber, natural rubber or a resin such as a diene type block polymer can be used individually or as a mixture of two or more of the same. The polymeric viscous material is desirably blended in an amount from 10 to 60 parts by weight, because the strength is insufficient if it is less than 10 parts by weight, while the heat softening nature is reduced to impair the workability upon molding and a disadvantage in view of the cost also results if it exceeds 60 parts by weight.
The softening agent is blended in an amount of from 10 to 50 parts by weight to the polymeric viscous material as described above. The softening agent is used for providing the polymeric viscous material with flexibility and adhesiveness, and well-known softening agents such as of vegetable oil, fatty oil,
REFERENCES:
patent: 4294732 (1981-10-01), Ohyachi et al.
patent: 4361607 (1982-11-01), Davis et al.
Fujikawa Atsunobu
Kito Osamu
Sano Osamu
Shibata Haruzi
Shimogo Kenzo
Aisin Kako Kabushiki Kaisha
Ives P. C.
Toyota Jidosha & Kabushiki Kaisha
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