Enhanced Tread Bonding Techniques for Tire Durability

Non-inflatable rubber wheel that doesn't require air pressure for vehicle mobility. The wheel has a metal rim with raised protrusions, a bonding adhesive layer, and a tread rubber component. The metal rim is plated with copper-zinc. The adhesive layer is made of natural rubber, epoxidized natural rubber, styrene-vinyl styrene-butadiene rubber, carbon black, silica, silane, resorcinol formaldehyde resin, tackifying resin, cobalt salt, antioxidant, accelerator, insoluble sulfur, and hexamethoxymethyl amine. Vulcanizing the wheel forms an integral composite part. The raised protrusions on the rim increase contact area with the adhesive, and the copper-zinc plating provides chemical bonding. The adhesive layer

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Rubber composition for adhering metals, a rubber-metal composite material, and a tire using the same. The composition includes an oxide of a metal (excluding Al) having an ionization tendency between Mn and Mg to 100 parts by mass of diene rubber containing 80 parts by mass or more of natural rubber and/or synthetic isoprene rubber.

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Rubber composition for adhering metals, a rubber-metal composite material, and a tire using the same. The composition includes a diene rubber, a specific plate metal oxide in a specific amount, and a tire using the same.

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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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Rubber-steel cord composite for tire belts and carcasses with improved adhesion to steel cords. The rubber composition contains a specific vulcanizing agent, N, N-dibenzylbenzothiazole-2-sulfenamide, and a bismaleimide compound.

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Rubber-steel cord composite for tire reinforcement with improved adhesion properties without using cobalt compounds. It contains a rubber composition with specific ratios of sulfur, N, N-dibenzylbenzothiazole-2-sulfenamide (accelerator), hexamethylene bis-thiosulfate disodium salt dihydrate and 1,6-bis(N, N-dibenzylthiocarbamoyldithio)hexane.

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Steel cords for reinforcing rubber products like tires have improved adhesion to rubber and better aging resistance compared to traditional cords. The steel filament has an unusual amount of iron at the top surface. The iron content is higher than 4 atomic percent in a thin 3 nm layer below the surface. The iron-rich layer enhances adhesion to rubber while retaining good properties. The cord can be made by drawing wire with increased surface roughness using diamond dies, and electrolytically coating with brass.

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Sulfur-cross-linkable rubber mixture for bonding rubber to strength members like textile or metallic cords in tires, belts, and hoses. The mixture contains novolac resins and etherified melamine resins to replace resorcinol as adhesive promoters for improved adhesion. The novolac resins are produced from a phenolic compound, aldehyde, and carbamate resin. The mixture also contains rubber, carbon black, silica, plasticizers, stabilizers, vulcanization activators, accelerators, and sulfur.

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A pneumatic tire design that enables improved adhesion between a hydrogenated copolymer rubber and a diene rubber in a tire while maintaining the wear resistance of the hydrogenated rubber. The tire includes a rubber member A containing a hydrogenated copolymer, sulfur, and a triazine-thiol compound. Rubber member B contains sulfur and a diene rubber. The hydrogenated copolymer has a high molecular weight and high hydrogenation level. The triazine-thiol compound provides adhesion between the copolymer and diene rubber.

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Method to improve adhesion between the support structure and tread in non-pneumatic tires without using specialized resins. The method involves modifying the outer surface of the support structure in the radial direction to have wetting tension of 40-60 mN/m. This is achieved by surface treatments like corona or plasma treatment. Then a vulcanizing adhesive is applied to the modified surface and vulcanized to bond the support and tread. This ensures good adhesion without requiring resins with specific chemical structures or properties in the support structure.

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A method to manufacture non-pneumatic tires with improved adhesion between the support structure and tread without using resin-containing support structures. The method involves sequentially applying a first adhesive with higher affinity for the resin and a second vulcanizing adhesive to the support structure. This improves compatibility between the adhesives and the resin. The vulcanization bonds the support structure and tread to ensure adhesion without needing a resin-containing support.

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Polybenzoxazine adhesive for bonding metal to rubber that has improved thermal and chemical stability compared to conventional adhesives. The adhesive is made from a thermosetting polymer derived from benzoxazine monomers containing sulfide groups. The polymer can coat metal surfaces and bond to rubber for metal/rubber composites like vehicle tires. The adhesive has the same initial adhesion as conventional rubber/metal adhesives but with improved long-term performance due to its chemical stability.

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Cord for reinforcing elastomers like rubber that has better adhesion to elastomers compared to conventional steel cords. The cord is made by twisting together metallic filaments with resin filaments. An inorganic filler is added to the resin filaments which improves adhesion to rubber during vulcanization.

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Tire with tread sipes for improved traction on wet and icy surfaces. The sipes have a unique shape with rounded corners at the bottom and sharp corners at the top. This shape allows the sipes to lock together when flexed, providing a better grip. A specific method of manufacturing a lamella plate to create the sipes with rounded and sharp corners is also disclosed. The plate is made from metal and material is added or removed to shape the corners. This design and manufacturing method improves tire performance and reduces manufacturing costs.

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Adhesive composition for tire cords that improves adhesion between tire rubber and tire cords while maintaining strength of the cords. The composition is environmentally friendly as it does not contain resorcinol-formaldehyde resin. The composition contains a reaction product of an epoxy resin and a diol compound, a water-dispersible polyurethane, and an isocyanate compound. The reaction product improves adhesion to rubber, the polyurethane provides flexibility, and the isocyanate crosslinks the adhesive to the cord.

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An environmentally friendly adhesive composition for tire cords that improves tire cord strength while enhancing adhesion between the tire rubber and tire cord. The composition does not contain the harmful RF resin commonly used in tire cord adhesives. It uses a unique formulation of water-dispersed polyurethane and an epoxy resin reacted with a diol compound. The adhesive composition is applied to tire cords during tire manufacturing to enhance adhesion to the rubber without negatively impacting cord stiffness. This provides improved tire cord strength and durability while avoiding the environmental and health concerns of traditional RF resin-based adhesives.

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Rubber composition for metal adhesion in tires that improves the adhesiveness between the rubber and metal reinforcing cords after aging. The composition contains cinnamic acid and/or cinnamic alcohol blended with a diene-based rubber containing 80% or more natural rubber or synthetic isoprene rubber. The cinnamic acid/alcohol amount is 0.5-10 parts per 100 parts rubber. This composition provides sufficient hardness and improves metal adhesion compared to conventional rubber compositions for metal adhesion.

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Off-the-road (OTR) bias tires with improved durability and extended life for heavy-duty applications. The tires have a blended transition layer between the tread and base layers. This blended layer is made by mixing the rubber compositions of the tread and base layers. The blended layer provides better adhesion between the tread and base layers compared to using separate materials. This reduces the likelihood of separation and delamination over time in harsh OTR environments. The blended layer allows for gradual transition in properties between the tread and base layers, which can help prevent cracking and delamination at the interface.

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A tire with a rubber tread that interlocks mechanically and optionally chemically with the polyurethane carcass. The tire has cavities in the inner surface of the rubber tread that protrusions from the polyurethane carcass fill to interlock the components. This provides a secure bond between the tread and carcass without adhesives. It involves molding the tire with the rubber tread inserted into the cavity and then injecting the polyurethane into the mold. Optionally, primers or adhesives can be applied between the components to enhance adhesion.

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Rubber composition for tire treads with high silica dispersibility and improved processability, and a tire using this composition. The rubber composition contains a diene rubber, silica, and a specific silane coupling agent with a sulfide group and polysiloxane structure. The coupling agent improves silica dispersion while preventing excessive thiol generation that impairs processability. The silane coupling agent content is 1-20% relative to the silica content.

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