Optimizing Sidewalls Extrusion for Tire Manufacturing

Pneumatic tire with improved durability and reduced sidewall heat generation. The tire has a unique sidewall construction that reduces heat buildup compared to conventional tires. The sidewall gum layers extend inward between the ply turns and the innermost belt edge. This sandwiches the sidewall rubber between the ply turns and innermost belt, preventing bulging and deformation that generates heat. The sidewall rubber overlaps the bead region and tread. This wraps the sidewall rubber around the bead core and tread instead of having separate sidewall parts. This reduces sidewall deformation and heat buildup.

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A tire design with improved durability and longevity. The tire has a unique stiffening structure inside the cavity that extends continuously from the sidewalls through the beads and into the crown. The stiffening elements are anchored in both the inner sidewall/bead reinforcements and the outer crown reinforcements. This prevents peeling and separation of the stiffening elements from the inner surfaces of the beads and crown. The continuous path around the tire helps distribute loads and forces between the sidewalls, beads, and crown to prevent localized failures.

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A tire design with a stiffening structure that improves durability and regularity of the tread contact area. The stiffening structure extends continuously from the sidewalls through the crown. It anchors into inner and outer reinforcing structures in the sidewalls/beads and crown. The anchor points in the ribs prevent flexing and deformation compared to anchoring in cutouts. This prevents separation and wear of the stiffening elements.

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Tire sidewall architecture to mitigate damage from pinch shock during severe impacts. The tire has shear layers in the shoulder and bead sections that oppose each other when the tire is pinched. This prevents cord breakage in the carcass layer from the sidewall buckling during pinch shock. The shear layers are made of softer, highly unsaturated diene elastomers compared to the carcass layer. This allows deformation of the shear layers without breaking the carcass cords when the tire pinches.

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Rubber composition with improved elasticity and adhesion for tire bead fillers and sidewalls. The composition contains a specific sulfenamide-based vulcanization accelerator, a phenolic resin, a methylene donor, and sulfur. The sulfenamide accelerator has a particular structure with a branched alkyl group on the sulfenamide nitrogen. This accelerator, along with the phenolic resin and methylene donor, enhances elasticity while maintaining adhesion compared to using conventional accelerators. The accelerator structure balances vulcanization rate and adhesion properties.

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Rubber compound for reinforcing sidewalls of tires, especially run-flat tires, that balances stiffness, elongation, and run-flat performance. The compound contains 20-80 parts natural/isoprene rubber, 80-20 parts syndiotactic crystal-containing butadiene rubber, and 5-50 parts silica with pH 7.0-12.0 in water. The syndiotactic butadiene increases stiffness, silica improves modulus without hurting elongation, and the pH range silica provides better reinforcement and adsorption for run-flat durability.

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Reducing weight of pneumatic tires while maintaining performance by using a glass bubble reinforced rubber compound in the sidewall. The sidewall rubber contains a diene elastomer and glass bubbles with a crush strength of at least 10,000 psi. The glass bubbles provide reinforcement to reduce the weight of the sidewall component compared to conventional fillers like carbon black. The glass bubbles must survive compounding and processing without breaking to achieve weight reduction.

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