Endless belt power transmission systems or components – Friction drive belt – Including embedded elongated strand having multiple...
Patent
1995-08-11
1996-07-02
Schoeppel, Roger J.
Endless belt power transmission systems or components
Friction drive belt
Including embedded elongated strand having multiple...
474268, F16G 110
Patent
active
055316506
DESCRIPTION:
BRIEF SUMMARY
TECHNICAL FIELD
The present invention relates to a power transmission belt.
BACKGROUND ART
Conventionally, power transmission belts have been used for various industrial fields such as industrial machines, automobiles and ships, and canvas, which has been adhered to the periphery of the power transmission belt, has been mainly coated with rubber cement by a spreading method. However, because an organic solvent has been used in the rubber cement, there are some problems such that there is a danger of fire and that environment pollution is generated.
As what can solve the problems which happen in the case that such rubber cement is used, a latex-containing composition aqueous chloroprene rubber latex and carboxylated chloroprene rubber latex has been proposed (Japanese Unexamined Patent Publication No. 15146/1988).
In the case that the above-mentioned latex-containing composition is used, the problems which happen when the rubber cements are used are solved. However, there arise problems that thermal resistance does not become sufficient and adhesion force between a rubber layer and canvas becomes small.
The present invention has been accomplished in consideration of the above-mentioned prior art. The present invention at providing a power transmission belt which does not necessitate an organic solvent, which is excellent in thermal resistance, and especially whose adhesion force between rubber layers and canvas is great.
DISCLOSURE OF THE INVENTION
The present invention relates to a power transmission belt comprising a laminate composed of an adhesive rubber layer in which core wires are buried and a compressed rubber layer, to the periphery of which being adhered canvas, characterized in that the above-mentioned canvas is impregnated with an aqueous latex composition comprising 2-chloro-1,3-butadiene-2,3-dichloro-1,3-butadiene copolymer latex.
BRIEF DESCRIPTION OF DRAWINGS
FIG. 1 is a schematic illustrative drawing of a V-belt which is one embodiment of a power transmission belt of the parent invention.
FIG. 2 is a schematic illustrative drawing of a V-ribbed belt which is one embodiment of a power transmission belt of the present invention.
BEST MODE FOR CARRYING OUT THE INVENTION
The power transmission belt of the present invention is what comprises a laminate composed of an adhesive rubber layer in which core wires are buried and a compressed rubber layer, to the periphery of which being adhered canvas, characterized in that the above-mentioned canvas is impregnated with an aqueous latex composition comprising 2-chloro-1,3-butadiene-2,3-dichloro-1,3-butadiene copolymer latex.
Hereinafter, the power transmission belt of the present invention will be explained referring to drawings.
FIG. 1 is a schematic illustrative drawing of a V-belt which is one embodiment of the power transmission belt of the present invention.
In FIG. 1, the adhesive rubber layer 3 in which the core wires 4 are buried and the compressed rubber layer 5 are laminated with each other, and the canvas 1 is adhered to the periphery of the adhesive rubber layer 3 and the compressed rubber layer 5.
The core wire 4 may be what is usually used, and as materials thereof, for instance, polyester, glass, polyamide and the like are cited. It is desired that the diameter of the core wire 4 is usually 0.5 to 2 mm or so. Also, the number of the buried core wire 4 may be suitably adjusted in accordance with the uses of the power transmission belt, and it is desired that the number is usually 4 to 10 or so.
As rubber components used for the adhesive rubber layer 3, in consideration of thermal resistance, dynamic fatigue resistance, adhesive property to the core wire 4 and the like, for instance, chloroprene rubber, hydrogenated acrylonitrile-butadiene rubber, chlorosulfonated polyethylene rubber and the like are desired. It is desired that hardness (Hs) of the adhesive rubber layer 3 is usually 60 to 80 (JIS A) or so, preferably 60 to 70 (JIS A) or so.
As rubber components used for the compressed rubber layer 5, in consideration of therma
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Bando Chemical Industries Ltd.
Schoeppel Roger J.
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