Winter Tyre Tread Composition for Snow Grip and Wear Balance
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Solution Overview
Problem
Current winter tires face challenges in achieving balanced performance on dry and wet surfaces while maintaining high grip on snow, with existing solutions failing to effectively improve dry performance and snow grip simultaneously.
Innovation Solution
A vulcanizable elastomeric composition for winter tires comprising a specific plasticizing mixture, including a liquid polymer, resin, and reinforcing filler, which is applied in a tread band to enhance rolling and wear resistance, thereby improving driving and braking on snow without compromising dry and wet surface performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If softer tread material is used to improve snow grip, then winter properties are improved, but wear resistance deteriorates
Solution Approach 1:
The patent employs composite materials by combining liquid polymers with specific resin systems (polyester resins, polyamide resins, or phenolic resins) and rubber compounding ingredients in a multi-layer structure. The outermost layer uses liquid polymers for snow grip while the composite nature of the underlying layers provides structural integrity and wear resistance, allowing the softer outer layer to conform to snow surfaces without the entire tread sacrificing durability.
2Strength
If resin content is increased to improve wear resistance, then durability is improved, but grip on snow deteriorates
Solution Approach 1:
The patent segments the tread into distinct layers with different compositions. The outermost layer contains liquid polymers and specific resin combinations optimized for snow grip with controlled wear properties, while underlying layers contain higher resin content for structural support and durability. This segmentation allows the snow-grip-optimized outer layer to function without being constrained by the wear-resistant but less compliant inner layers.
Data Source
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AI summary
The present invention relates to a winter tyre for vehicles comprising a tread band obtained by vulcanisation of a new elastomeric composition. Said elastomeric composition comprises among the others a plasticising mixture of liquid polymer (A), resin (B) and possibly plasticising oil (C). Said winter tyre, in addition to excellent driving and braking on snow and at low temperatures, surprisingly exhibits an optimal balance of notoriously conflicting properties, such as the behaviour on wet and dry.