摘要:
A fluororubber composition including a fluororubber having an iodine content of 10 to 90 mol % for the total mole of the polymer end groups and a carbon black (B), wherein a difference (δG′), represented by G′(1%)-G′(100%), is not lower than 120 kPa and not higher than 3,000 kPa, where G′(1%) denotes a shear modulus at a dynamic strain of 1% under an uncrosslinked state and G′(100%) denotes a shear modulus at a dynamic strain of 100% under an uncrosslinked state, and G′(1%) and G′(100%) are determined by a dynamic viscoelasticity test with a rubber process analyzer (RPA) in a condition that the measurement frequency is 1 Hz and the measurement temperature is 100° C.
摘要:
This disclosure describes systems and methods which utilize organoclays compounded with zinc acrylates to improve the performance of drive belts. In performing research on organoclays, the inventors created formulations and methods of compatibilizing organoclays with metal salts of α-β-unsaturated organic acids and incorporating the compatibilized organoclays into the belt compound so that the planar organoclay particles are substantially aligned with the longitudinal plane of the belt. This is shown to provide a) lower Mooney viscosity (resulting in greater ease of processing), b) higher stiffness (both tensile and dynamic) c) improved tear resistance, d) lower crack growth rate and e) nearly equivalent fatigue resistance in spite of the increased stiffness. This combination of traits in the belts created utilizing the organoclay/zinc acrylate technology described herein results in an unexpectedly improved belt.
摘要:
A transmission belt is looped over pulleys to transmit torque between the pulleys. The transmission belt includes a metallic soap layer on a face (i) on an inner periphery of the transmission belt, and (ii) in contact with the pulleys. The metallic soap layer includes powdered metallic soap.
摘要:
A power transmission belt includes a transparent or semitransparent sheet material covering a portion of a surface of a belt body including a mark. At least a portion of the belt body covered with the sheet material is made of a rubber composition vulcanized with sulfur. The sheet material is made of a rubber material containing a diene rubber. The sheet material is vulcanized with sulfur together with the rubber composition forming the portion of the belt body covered with the sheet material such that the sheet material is connected to the belt body.
摘要:
The invention relates to a v-ribbed belt (10) manufactured in a molding or grinding process, comprising a plurality of ribs (1) for engaging a multi-groove belt pulley (4), which in different areas of the structure thereof can comprise different elastomer materials. In two rib segments 8, 9), v-ribbed belt has differing elastomer materials that are exposed toward the flank (6) of the rib (1), wherein the upper rib segments (8) oriented toward the belt pulley are made of an elastomer material that essentially is not electrically conductive. The lower rib segments (9) are made of an electrically conductive elastomer material. The height ratio a/(a+b) of the height (a) of the lower rib segments (9) to the overall height (a+b) of the rib (1), as measured at the material boundary (12) located at the rib flank (6), is at least 6 percent, or the absolute height (a) of the lower rib segments (9) is at least 0.12 mm. The invention further relates to a method for producing a v-ribbed belt according to the invention.
摘要:
An object is to provide a transmission belt which is restrained from being deteriorated in a high-temperature atmosphere, is excellent in softness in a low-temperature atmosphere, and is hardly worn away. To attain the object, the invention provides a transmission belt made of a rubber composition wherein the ratio by weight of a Ziegler-Natta catalyst type ethylene/α-olefin copolymer rubber, which is an ethylene/α-olefin copolymer rubber obtained by polymerization in the presence of a Ziegler-Natta catalyst, to a metallocene type ethylene/α-olefin copolymer rubber, which is an ethylene/α-olefin copolymer rubber obtained by polymerization in the presence of a metallocene catalyst, is from 50/50 to 90/10.
摘要:
A device for transmitting motion comprises a flexible elastomeric element and at least one rigid element in surface contact with one another, wherein the surface of said flexible elastomeric element that comes into surface contact with said rigid element has been surface treated with a halogenated polyether.
摘要:
Power transmission belts have a cushion stock which improves the durability of the belts. The cushion stock contains a melamine and a silane and preferably cotton reinforcement and silica. 2-thiazolidinethiones can be used as accelerators in the cushion stocks.
摘要:
A raw edge V-belt includes: a compression rubber layer formed on an inner side of the belt and made of a rubber composition. The rubber composition contains a rubber component, fine cellulose fibers, and short fibers. The content of the short fibers in the rubber composition is 25 parts by mass or more and 45 parts by mass or less per 100 parts by mass of the rubber component, and the volume fraction of the short fibers in the rubber composition is 12.5 vol % or more.