A frictional power transmission belt includes a compression rubber layer having a frictional power transmission surface that is covered with a fabric. The compression rubber layer includes an inner rubber layer in contact with the fabric and an outer rubber layer on an outer peripheral side of the inner rubber layer. The inner rubber layer is formed of a cured product of a rubber composition including a surfactant as a hydrophilic plasticizer, an unsaturated carboxylic acid metal salt, and polyolefin particles.

A frictional power transmission belt includes a compression rubber layer having a frictional power transmission surface that is covered with a fabric. The compression rubber layer includes an inner rubber layer in contact with the fabric and an outer rubber layer on an outer peripheral side of the inner rubber layer. The inner rubber layer is formed of a cured product of a rubber composition including a surfactant as a hydrophilic plasticizer, an unsaturated carboxylic acid metal salt, and polyolefin particles.

Die invention relates to a drive belt, in particular V-belt, V-ribbed belt or toothed belt on an elastomer or polyurethane base, with belt backing and at least one tension member, comprising an optically detectable load and wear state display. According to the invention, a recess if formed over at least one belt section, and accommodated a flat support, wherein the support is furnished, in particular coated or impregnated with irreversibly thermochromic pigments, in such manner that a collour change or discolouration takes place at a predeterminable temperature load threshold.

Die invention relates to a drive belt, in particular V-belt, V-ribbed belt or toothed belt on an elastomer or polyurethane base, with belt backing and at least one tension member, comprising an optically detectable load and wear state display. According to the invention, a recess if formed over at least one belt section, and accommodated a flat support, wherein the support is furnished, in particular coated or impregnated with irreversibly thermochromic pigments, in such manner that a collour change or discolouration takes place at a predeterminable temperature load threshold.

A power transmission belt includes a belt body at least portion of which is made of a rubber composition containing a rubber component, cellulose-based fine fibers, and cotton powder.

A power transmission belt includes a belt body at least portion of which is made of a rubber composition containing a rubber component, cellulose-based fine fibers, and cotton powder.

The present invention relates to a V-ribbed belt that has a medium elongation of 0.8% or more when the load of 4 cN/dtex is applied, and that contains a twisted cord in which a high-elongation aramid fiber having a tensile modulus of 50-100 GPa and a low-modulus fiber having a lower tensile modulus than the high-elongation aramid fiber are blended and twisted.

The present invention relates to a V-ribbed belt that has a medium elongation of 0.8% or more when the load of 4 cN/dtex is applied, and that contains a twisted cord in which a high-elongation aramid fiber having a tensile modulus of 50-100 GPa and a low-modulus fiber having a lower tensile modulus than the high-elongation aramid fiber are blended and twisted.

The frictional power transmission belt includes a frictional power transmission surface formed of a composite fibrous layer containing a fibrous member, an isocyanate compound, and a resin component, wherein the fibrous member contains a cellulose-based fiber. A proportion of each of the isocyanate compound and the resin component in the composite fibrous layer may be 2 to 15% by mass.

The frictional power transmission belt includes a frictional power transmission surface formed of a composite fibrous layer containing a fibrous member, an isocyanate compound, and a resin component, wherein the fibrous member contains a cellulose-based fiber. A proportion of each of the isocyanate compound and the resin component in the composite fibrous layer may be 2 to 15% by mass.