The present invention relates to a transmission belt which is provided with: a rubber layer that is formed from a vulcanized product of a rubber composition which contains a rubber component containing an ethylene--olefin elastomer, a filler containing silica, a vulcanizing agent containing a sulfur-based vulcanizing agent, and a curable resin containing an amino resin; and a fiber member that is in contact with the rubber layer.

A belt for an elevator system includes one or more tension members arranged along a belt width and extending longitudinally along a length of the belt, each tension member including a plurality of fibers extending along the belt length. A jacket material at least partially encapsulates the plurality of tension members. An elevator system includes a hoistway, an elevator car located in the hoistway and movable therein, and a belt operably connected to the elevator car to suspend and/or drive the elevator car along the hoistway. The belt includes one or more tension members arranged along a belt width and extending longitudinally along a length of the belt, each tension member including a plurality of fibers extending along the belt length. A jacket material at least partially encapsulates the plurality of tension members.

A belt for an elevator system includes one or more tension members arranged along a belt width and extending longitudinally along a length of the belt, each tension member including a plurality of fibers extending along the belt length. A jacket material at least partially encapsulates the plurality of tension members. An elevator system includes a hoistway, an elevator car located in the hoistway and movable therein, and a belt operably connected to the elevator car to suspend and/or drive the elevator car along the hoistway. The belt includes one or more tension members arranged along a belt width and extending longitudinally along a length of the belt, each tension member including a plurality of fibers extending along the belt length. A jacket material at least partially encapsulates the plurality of tension members.

A power transmission belt is at least partially formed of a rubber composition. The rubber composition contains a rubber component, cellulose nanofibers, and carbon black. The amount of the cellulose nanofibers to be added is from 0.1 parts by mass to 20 parts by mass, relative to 100 parts by mass of the rubber component. The amount of the carbon black to be added is from 5 parts by mass to 80 parts by mass, relative to 100 parts by mass of the rubber component. The sum of the amount of the carbon black to be added and three times the amount of the cellulose nanofibers to be added is from 15 to 90.

A rubber-reinforcing cord of the present invention is a rubber-reinforcing cord for reinforcing a rubber product. The rubber-reinforcing cord includes at least one strand. The strand includes at least one filament bundle and a coating provided to cover at least a portion of a surface of the filament bundle. The coating includes a rubber component and a crosslinking agent. The crosslinking agent includes two or more isocyanate compounds.

A rubber-reinforcing cord of the present invention is a rubber-reinforcing cord for reinforcing a rubber product. The rubber-reinforcing cord includes at least one strand. The strand includes at least one filament bundle and a coating provided to cover at least a portion of a surface of the filament bundle. The coating includes a rubber component and a crosslinking agent. The crosslinking agent includes two or more isocyanate compounds.

A power transmission belt at least includes a bottom rubber layer. A rubber composition for forming the bottom rubber layer contains a rubber component, cellulose fine fibers, and short fibers. The cellulose fine fibers have an average diameter from 1 nm to 200 nm, and the rubber composition contains 0.5 parts by mass or more of the cellulose fine fibers relative to 100 parts by mass of the rubber component. The short fibers have an average diameter from 5 m to 30 m, and the rubber composition contains 1 part by mass or more of the short fibers relative to 100 parts by mass the rubber component.

A power transmission belt at least includes a bottom rubber layer. A rubber composition for forming the bottom rubber layer contains a rubber component, cellulose fine fibers, and short fibers. The cellulose fine fibers have an average diameter from 1 nm to 200 nm, and the rubber composition contains 0.5 parts by mass or more of the cellulose fine fibers relative to 100 parts by mass of the rubber component. The short fibers have an average diameter from 5 m to 30 m, and the rubber composition contains 1 part by mass or more of the short fibers relative to 100 parts by mass the rubber component.

A drive belt having a main body formed of an elastomeric material, preferably a v-belt or v-ribbed belt, the drive belt including a top layer as belt backing, a power transmission zone having two or more tensile strands as strength members, and also a substructure optionally provided with some profiling preferably having a v-shape or a v-rib profile. The strength members are formed of cords made of mutually twisted plies (final twist), the plies being in turn twisted out of individual yarns (first twist). The cords consist essentially of polyethylene terephthalate (PET) and of two plies, the number of turns introduced into the plies twisted into a cord (final twist) and the number of turns introduced into the yarns twisted into a ply (first twist) differing by not more than 10 turns per meter (t/m).

A drive belt having a main body formed of an elastomeric material, preferably a v-belt or v-ribbed belt, the drive belt including a top layer as belt backing, a power transmission zone having two or more tensile strands as strength members, and also a substructure optionally provided with some profiling preferably having a v-shape or a v-rib profile. The strength members are formed of cords made of mutually twisted plies (final twist), the plies being in turn twisted out of individual yarns (first twist). The cords consist essentially of polyethylene terephthalate (PET) and of two plies, the number of turns introduced into the plies twisted into a cord (final twist) and the number of turns introduced into the yarns twisted into a ply (first twist) differing by not more than 10 turns per meter (t/m).