Power transmission belt and method of manufacturing a power transmission belt
First Claim
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1. A power transmission belt comprising:
- a body with a length, a width between laterally spaced sides, an inside and an outside,the body comprising rubber in which at least one load carrying member is embedded and extends lengthwise of the body,the rubber comprising ethylene-α
-olefin rubber,the at least one load carrying member having an outer surface; and
first, second and third films formed on the outer surface of the at least one load carrying member,the first film comprising at least one of an isocyanate compound and an epoxy compound,the second film comprising resorcinol-formaldehyde-latex with latex comprising at least polybutadiene,the third film comprising an ethylene-propylene-diene terpolymer,wherein the third film comprises an ethylene-propylene-diene terpolymer having a diene content of 5 to 12.5 wt %,wherein said films enhance adherence of the rubber and the at least one load carrying member to each other, andwherein said second film and said third film do not comprise halogen-containing compositions.
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Abstract
A power transmission belt having a body made at least in part from ethylene-α-olefin rubber. At least one load carrying member is embedded in the ethylene-α-olefin rubber. First, second and third films are formed on the load carrying member. The first film is made from at least one of an isocyanate compound and an epoxy compound, the second film from polybutadiene rubber, and the third film from an ethylene-propylene-diene terpolymer.
13 Citations
10 Claims
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1. A power transmission belt comprising:
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a body with a length, a width between laterally spaced sides, an inside and an outside, the body comprising rubber in which at least one load carrying member is embedded and extends lengthwise of the body, the rubber comprising ethylene-α
-olefin rubber,the at least one load carrying member having an outer surface; and first, second and third films formed on the outer surface of the at least one load carrying member, the first film comprising at least one of an isocyanate compound and an epoxy compound, the second film comprising resorcinol-formaldehyde-latex with latex comprising at least polybutadiene, the third film comprising an ethylene-propylene-diene terpolymer, wherein the third film comprises an ethylene-propylene-diene terpolymer having a diene content of 5 to 12.5 wt %, wherein said films enhance adherence of the rubber and the at least one load carrying member to each other, and wherein said second film and said third film do not comprise halogen-containing compositions. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A power transmission belt comprising:
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a body with a length, a width between laterally spaced sides, an inside and an outside, the body comprising rubber in which at least one load carrying member is embedded and extends lengthwise of the body, the rubber comprising ethylene-α
-olefin rubber,the at least one load carrying member having an outer surface; and first, second and third films formed on the outer surface of the at least one load carrying member, the first film comprising at least one of an isocyanate compound and an epoxy compound, the second film comprising polybutadiene rubber, the third film comprising an ethylene-propylene-diene terpolymer, wherein the first film is formed directly on the outer surface of the at least one load carrying member followed by the second film and then the third film; wherein the second film comprises resorcinol-formaldehyde-latex with latex comprising at least polybutadiene, wherein a proportion of butadiene in a solid content of the latex is at least 50 mass %, wherein the third film comprises an ethylene-propylene-diene terpolymer having a diene content of 5 to 12.5 wt. %, wherein said films enhance adherence of the rubber and the at least one load carrying member to each other, and wherein said second film and said third film do not comprise halogen-containing compositions.
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Specification