Mitsuboshi Belting Ltd.

Hideyuki Matsumoto

Hisato Ishiguro

Susumu Takaba

Toshihiro Nishimura

Yosuke Sueto

Mikio Kageyama

The present invention relates to a power transmission belt provided with a tension member, a tension member-supporting layer, a tension rubber layer, and a compression rubber layer, the belt having a plurality of cog portions, in which the tension member is formed of an aramid fiber, the compression rubber layer is formed of a vulcanized rubber composition containing a rubber component and aramid short fibers embedded in the vulcanized rubber composition with being arranged in a width direction of the belt, the power transmission belt has a strain of from 0.5 to 0.8% when compressed under a stress of 2.0 N/mm2 in the width direction, and the power transmission belt has a strain of from 0.35 to 0.7% when pulled under a load of 2 kN in the lengthwise direction.

Transmission belt and belt-speed-change device

The present invention relates to a method for producing an aramid core wire, containing a step of covering or impregnating an original yarn of an aramid core with a first treating agent containing a condensate of resorcin and formaldehyde, a latex and a water-soluble epoxy compound; an aramid core wire produced by the method; a transmission belt containing the aramid core wire; a method for producing the transmission belt; and a treating agent.

Aramid core wire, method for producing the same, transmission belt, method for producing the same, and treating agent for aramid core wire

A power transmission belt having a body made at least in part from ethylene-&#x3b1;-olefin rubber. At least one load carrying member is embedded in the ethylene-&#x3b1;-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.

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Hyogo, Japan

Hideyuki Matsumoto