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公开(公告)号：EP3604855A1
公开(公告)日：2020-02-05
申请号：EP18770304.6
申请日：2018-03-20
摘要： The present invention provides a friction transmission belt which is provided with: an extension layer (5) which forms the back surface of the belt; a compressed rubber layer (2) which is formed on one surface of the extension layer and is in contact with pulleys so as to be frictionally engaged with the pulleys; and a core wire (1) which is embedded between the extension layer and the compressed rubber layer in the longitudinal direction of the belt. The compressed rubber layer has a surface that comes into contact with the pulleys; at least a part of the surface is covered with a fiber layer with a fiber resin mixed layer being interposed therebetween; the fiber resin mixed layer contains a resin component and heat-resistant fibers which have a softening point or melting point higher than the vulcanization temperature of a rubber that constitutes the compressed rubber layer; and the fiber layer contains hydrophilic heat-resistant fibers which have a softening point or melting point higher than the above-mentioned vulcanization temperature, but does not contain a resin component.
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公开(公告)号：EP3786479A1
公开(公告)日：2021-03-03
申请号：EP19792634.8
申请日：2019-04-25
发明人： IMAI, Hiroki , MARUYAMA, Yuji , HASEGAWA, Arata
摘要： In a V-ribbed belt provided with a compressed rubber layer which has a plurality of V-ribbed portions extending parallel to one another in a belt longitudinal direction, and which has a friction transmission surface at least a portion of which is capable of coming into contact with a V-ribbed groove portion of a pulley, the friction transmission surface of the compressed rubber layer is formed from a rubber composition vulcanizate including a rubber component and a sound generation resistance improving agent, and a difference Rp-Rb between a radius of curvature Rp of a rib distal end portion of the pulley and a radius of curvature Rb of a rib bottom portion of the V-ribbed belt is adjusted to be between -0.08 and 0.08 mm. The radius of curvature Rb of the rib bottom portion of the V-ribbed belt may be approximately 0.1 to 0.5 mm. The radius of curvature difference Rp-Rb may be between -0.05 and 0.05 mm. The pulley may include a pulley having an outer diameter at most equal to 65 mm.
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公开(公告)号：EP3505792A1
公开(公告)日：2019-07-03
申请号：EP17846360.0
申请日：2017-08-25
摘要： Provided is a v-ribbed belt comprising a compression rubber layer that has a plurality of v-ribbed sections that extend in the longitudinal direction of the belt and are parallel to each other and has a friction transmission face, at least a portion of which can contact a v-ribbed groove of a pulley, wherein the friction transmission face of the compression rubber layer is formed with a vulcanizate of a rubber composition containing a rubber component and an agent to improve sound proofing, and the v-ribbed angle of the v-ribbed portion is 5° to 9° larger than the v-ribbed groove angle of the pulley
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