Vibration damping soundproof sheets for use in vehicles
AssigneeToyoda Gosei Co., Ltd.
InventorsJunichi Sato, Tomoyoshi Yamada, Junichiro Naito, Kunihisa Shigenobu, Kouichi Sato
Life of this patent
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Abstract
This invention is directed to a vibration damping soundproof sheet for use in vehicles, in which the surface of the soundproof layer is made flat irrespective of the or uneven configuration at the surface of a vehicle. The soundproof layer-forming material comprises a formed rubber blend in which a foaming agent and other rubber blending agents are blended with a rubber type polymer in which the soundproof layer-forming material contains from 15 to 85% by weight of 1,2-polybutadiene ingredient.
Claims13
Vibration damping soundproof sheet for use in vehicles comprising:
- (A) a vibration damping layer-forming material comprising a rubber type adhesive blend, in which a tackifier, an inorganic filler, a fiberous filler and a softening agent was blended to a matrix comprising a rubber ingredient and a bituminous ingredient, and
- (B) a soundproof layer-forming material comprising a foamed rubber blend to be bonded to form on said vibration damping layer forming material, in which a foaming agent and other rubber blending agents are blended to a rubber type polymer containing from 15 to 85% by weight of 1,2-polybutadiene ingredient.
A vibration damping soundproof sheet for use in vehicles comprising:
- (A) a vibration damping layer-forming material comprising a rubber type adhesive blend, in which a tackifier, an inorganic filler, a fiberous filler, a softening agent and a thermosetting resin capable of co-crosslinking with a rubber ingredient is blended to a matrix comprising said rubber ingredient and a bituminous ingredient, and
- (B) a soundproof layer forming-material composing a foamed rubber blend to be bonded to form on said vibration damping layer-forming material, in which a foaming agent and other rubber blending agents are blended to a rubber type polymer containing from 15 to 85% by weight of a 1,2-polybutadiene ingredient.
A vibration damping soundproof sheet for use vehicles comprising:
- (A) a vibration damping layer forming material comprising a rubber type adhesive blend in which a tackifier, an inorganic filler, a fiberous filler and a softening agent are blended to a matrix comprising a rubber ingredient and a bituminous ingredient,
- (B) a retainer layer-forming material to be bonded to form on said vibration damping layer forming material comprising a thermosetting resin capable of co-crosslinking with the rubber ingredient in said vibration damping layer-forming material, and
- (C) a vibration proof layer forming material composing a foamed rubber blend to be bonded to form on said retainer layer-forming material, in which a foaming agent and other rubber blending agents are blended to a rubber type polymer containing from 15 to 85% by weight of 1,2-polybutadiene ingredient.
A vibration damping soundproof sheet for use in vehicles comprising:
- (A) a vibration damping layer-forming material comprising a rubber type adhesive blend, in which a tackifier, an inorganic filler, a fiberous filler, a softening agent and a thermosetting resin capable of co-crosslinking with a rubber ingredient are blended to a matrix comprising said rubber ingredient and a bituminous ingredient,
- (B) a retainer layer-forming material to be bonded to form onto said vibration damping layer forming material comprising a thermosetting resin capable of co-crosslinking with the rubber ingredient of said vibration damping layer-forming material, and
- (C) a soundproof layer-forming material comprising a foamed rubber blend to be bonded to form onto said retainer layer-forming material, in which a forming agent and other rubber blending agents are blended to a rubber type polymer containing from 15 to 85% by weight of 1,2-polybutadiene ingredient.
A vibration damping soundproof sheet for use in vehicles comprising:
- (A) a vibration damping layer prepared by vulcanizing a rubber type adhesive blend, in which a tackifier, an inorganic filler, a fiberous filler and a softening agent are blended to a matrix comprising a rubber ingredient and a bituminous ingredient,
- (B) a soundproof layer to be formed onto said vibration damping layer prepared by vulcanizing a foamed rubber blend and having an open cell structure, in which a foaming agent and other rubber blending agents are blended to a rubber type polymer containing from 15 to 85% by weight of 1,2-polybutadiene ingredient, and
- (C) a resonance absorption plate layer made of material to be formed on said soundproof layer and having a higher density than said soundproof layer.
Dependencies are inferred from the claim text.