Power transmission belt having high modulus adhesive rubber member
AssigneeThe Gates Corporation
InventorBobbie E. South
Life of this patent
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Abstract
Power transmission belts, including V-belts, synchronous belts and multi-V-ribbed belts, comprising an elastomeric belt body portion and a load-carrying section embedded therein and extending in the longitudinal direction of the belt; the load-carrying section comprising a tensile member disposed in an adhesive rubber member, wherein at least one of said elastomeric belt body portion and said adhesive rubber member exhibits at least one of a complex modulus measured at 175° C., at 2000.0 cpm and at a strain of 0.09 degrees, of at least 15,000 kPa; and a tensile modulus, measur and 10% elongation, of at least 250 psi (1.724 MPa).
Claims22
An endless belt selected from a V-belt and a multi-v-ribbed belt, comprising a longitudinally extending tensile member embedded in a cured elastomeric belt body, wherein at least a portion of said tensile member is in contact with a cured elastomer composition, and characterized in that the cured elastomer composition exhibits at least one of a complex modulus measured at a temperature of 175° C., a frequency of 2000 cpm and a strain of 0.09 degrees, of at least about 15,000 kPa;
- and a tensile modulus at 10% elongation and 125° C. of at least about 250 psi.
A method of forming an endless belt, selected from a V-belt and a multi-v-ribbed belt, comprising the steps of:
- a) applying in any order;
- (i) a layer comprising an uncured belt body portion elastomer composition,
- (ii) an uncured adhesive rubber composition, and
- (iii) a tensile member to a belt-building drum to form an uncured sub-assembly;
- and
- b) curing the sub-assembly with a cure-effective amount of curative;
- c) and characterized in that the method further comprises the step performed prior to the step of applying said compositions to said belt-building drum, of forming at least one of said uncured elastomer composition and said uncured adhesive rubber composition to exhibit in a cured state at least one of a complex modulus, measured at 175° C., a frequency of 2000.0 cpm and 0.09 degrees strain, of at least 15,000 kPa;
- or a tensile modulus, measured at 10% elongation and 125° C., of at least 250 psi.
An endless belt selected from a V-belt and a multi-v-ribbed belt, comprising a longitudinally extending tensile member embedded in a cured elastomeric belt body, wherein at least a portion of said tensile member is in contact with a cured elastomer composition, and characterized in that the cured elastomer composition exhibits at least one of a complex modulus measured at a temperature of 175° C., a frequency of 2000 cpm and a strain of 0.09 degrees, of at least 15,000 kPa;
- and a tensile modulus at 10% elongation and 125° C. of at least 250 psi.
Dependencies are inferred from the claim text.