Enhancing Wear Resistance in Tires: A Compilation of Patent Techniques

A rubber composition containing an inverse vulcanizate that has improved breaking strength. The inverse vulcanizate contains at least 10% carbon atoms and 30% sulfur atoms. The composition can be used in tires to improve durability. The inverse vulcanizate is a sulfur-rich material that is different from normal vulcanizates and provides enhanced breaking properties.

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A cross-linkable rubber composition for tire treads with improved rolling resistance and wet grip. It contains natural rubber or isoprene rubber, syndiotactic 1,2 polybutadiene, and carbon black filler. The key is using a small amount of syndiotactic 1,2 polybutadiene rubber along with carbon black. This provides a balance of wet grip and rolling resistance properties when cured, without compromising either.

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Rubber composition for tires containing an inverse vulcanizate having a low glass transition temperature. The inverse vulcanizate is a sulfur-crosslinked organic substance. Rubber compositions containing this inverse vulcanizate have improved breaking strength compared to normal vulcanizate rubber. The inverse vulcanizate has a Tg of 60°C or lower.

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Tire tread design with sipes that maintain performance as the tire wears. The tread has sipes with three different depths, forming three levels in the tread blocks. The shallowest sipes are at the top level and the deepest sipes are at the bottom level. This allows the sipes to maintain their biting edges and void volume as the tread wears down, improving wet and snow traction over the life of the tire. The staggered depth levels also prevent damage or tearing when the mold is removed from the tread during manufacturing.

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Pneumatic tire with a steel-reinforced carcass that improves durability and running performance. The tire has a unique carcass design that eliminates the need for additional reinforcement members to maintain the carcass turn-up. The carcass extends from the bead up and around the apex that absorbs impacts. The key is that one end of the carcass is closer to the bead than the other end is to the apex. This maintains the turn-up height without additional components, reducing weight and rolling resistance while still preventing the carcass from loosening.

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Heavy-duty tire design and manufacturing to improve bead durability without increasing rolling resistance. The tire has a unique carcass contour and molding process. The carcass contour has an outwardly bulging curved portion connected to an inwardly recessed inversely curved portion. This shape is represented by two tangent arcs. The ratio of distances from the tire equator and bead base to the arcs' inflection point falls within specific ranges. The molding process uses a clip width slightly larger than the rim width to apply pressure evenly during vulcanization.

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Tire construction for a motorcycle tire that provides improved turning performance and durability compared to conventional motorcycle tires. The tire has a tread reinforcing layer with specific belt and band ply orientations and widths. The inner belt ply has cords angled greater than 5 degrees to the tire circumferential direction. The outer belt ply has cords angled greater than 5 degrees but with a wider width than the inner belt ply. The band ply has cords angled less than or equal to 5 degrees. This combination of belt and band ply angles and widths optimizes cornering force distribution and reduces tire wear for improved turning performance and durability.

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A pneumatic tire design that enhances steering stability and crack growth resistance in cold temperatures. The tire uses a specific rubber composition for the inner liner and tie rubber. The inner liner rubber contains carbon black, resin, and zinc oxide in specific amounts along with halogenated butyl rubber. The tie rubber contains diene rubber matching adjacent layers. These compositions balance hardness, adhesion, and low-temperature properties to optimize tire performance.

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Agricultural vehicle tires with lugs that have features to improve traction and reduce stubble damage. The lugs have a discontinuity on the leading face of the outer end to allow residual stubble to be expelled from the tread. They also have a discontinuity on the trailing face that extends inwards towards the adjacent lug to reduce attack points.

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A tire design that improves braking performance while reducing uneven wear. The tire has a tread with a lateral groove to expel water. The groove has an inclined surface on the groove opening and an opposing inclined surface internally. The angle of the outer inclined surface is 15-30 degrees and the inner inclined surface angle is 5-25 degrees. These angles concentrate braking forces away from the groove opening to reduce uneven wear.

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A passenger vehicle tire with improved resistance to penetration and puncture while also being lighter weight than conventional tires. The tire reinforcement design uses a triangulated arrangement of the carcass, working, and hooping layers. The carcass layer angle is optimized for flexibility while the hooping layer angle is shallow to provide radial stiffness. The hooping layer has narrow-spaced reinforcements with high strength. The resulting tire has reduced susceptibility to puncture while using less material.

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A tire with zigzag sipes in the tread that allows for better traction on snow and ice when the tire is worn. The zigzag sipes have a changing amplitude from the sipe opening to the maximum depth, with the maximum amplitude not at the opening. This ensures that as the tire wears, the exposed sipe edges still provide biting edges for traction.

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A compound that improves the abrasion resistance of rubber compositions such as tires. The compound is a trisulfide with specific substitution patterns on the sulfur atoms.

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Producing a motor vehicle tire with improved bonding between textile cords and surrounding rubber to enhance tire durability. The method involves dipping the cords in a bath containing polyisocyanates to activate the bonding, instead of using resorcinol-formaldehyde dips. The cords are then coated with a rubber compound containing specific rubber types and carbon blacks. This avoids toxic and environmentally harmful resorcinol-formaldehyde dips while still providing adequate bonding.

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A tire with improved corrosion resistance and durability. The tire includes a cord for the carcass ply made of twisted steel filaments and a resin filament filling the gaps between them. The resin filament contains an ionomer to adhere to the steel and prevent water infiltration. The resin also contains inorganic fillers for reinforcement. Vulcanizing the tire softens the resin which flows to fill the cord gaps and cover the steel. This provides a corrosion-resistant barrier around the steel and prevents fretting between the steel and wrapping filament.

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A tire with improved resistance to chipping on bad roads at high speed. The tire has a tread with one or more circumferential main grooves that bend and deviate at a bending point. The rubber composition of the tread has specific properties - tan delta at 20C of 0.30 or less, breaking strength at 175C times elongation at 175C divided by 2 equal to or greater than 600.

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A pneumatic tire that exhibits excellent grip performance and durability during high-speed running, and also improved fuel efficiency. The tire achieves this by having tread regions with different thermal conductivities. These regions are made of rubber compositions with high and low thermal conductivity. The high thermal conductivity composition dissipates heat generated during high-speed running, preventing overheating and maintaining grip. The low thermal conductivity composition retains heat and provides durability.

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A pneumatic tire with reduced rolling resistance and improved durability for high-speed driving. The tire has a side rubber thickness of 3mm or less outside the carcass at the widest point, a loss tangent of 0.15 or less for the rubber, and specific dimensional ratios. The ratio of (outer diameter minus 2 times height) to width is at least 470mm, and the aspect ratio is 45% or higher.

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A high fuel efficiency tire with reduced rolling resistance at high speeds and excellent durability. The tire has a sidewall and clinch portion where the loss tangent measured at 70°C and 10 Hz is such that (tan δ sidewall + tan δ clinch) ≤ 0.3 and |tan δ sidewall - tan δ clinch| ≤ 0.07. It also has a sidewall-to-clinch complex elastic modulus difference of (E clinch - E sidewall) ≤ 8.0 MPa.

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Pneumatic tire design with improved bead durability and ride comfort. It has a reinforcing rubber portion next to the turnup section of the carcass ply, between the bead and sidewall. This reinforcing rubber portion has a radially outer end that extends beyond the radially outer end of the inner rubber layer. It also has a thicker first portion where the inner and outer rubber layers are laminated, versus a thinner second portion where they are not. The outer rubber layer has a higher loss tangent and complex elastic modulus than the inner layer.

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