Tire Tread Rubber Composition for Abrasion Resistance and Ride Comfort
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Solution Overview
Problem
Existing tires face challenges in achieving a balance between abrasion resistance and ride comfort, with existing improvements not fully addressing both aspects simultaneously.
Innovation Solution
A tire design comprising a tread part made of a rubber composition with specific ratios of carbon black, rubber powder, and rubber powder particle size, along with defined thickness and BET specific surface areas, to enhance reinforcing properties and absorb road shocks.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the rubber composition uses conventional carbon black content and rubber powder specifications, then basic tire structure is maintained, but abrasion resistance and ride comfort cannot be simultaneously improved
Solution Approach 1:
The patent applies parameter changes by precisely controlling the carbon black content (C > 20 parts by mass per 100 parts rubber component), rubber powder particle size (40 mesh or more), and BET specific surface area (B ≥ 0.100 m²/g). These parameter optimizations simultaneously improve abrasion resistance through enhanced filler-rubber interaction and ride comfort through optimized shock absorption properties.
Solution Approach 2:
The patent uses composite materials by combining carbon black and rubber powder with specific properties in the rubber composition. The composite structure of carbon black particles and rubber powder particles creates synergistic effects that enhance both abrasion resistance and ride comfort, resolving the technical contradiction between these two performance aspects.
2Strength
If carbon black content is increased to improve abrasion resistance, then reinforcing property improves, but ride comfort may deteriorate due to increased stiffness
Solution Approach 1:
The patent applies local quality by using rubber powder with specific particle size distribution (40 mesh or more) and BET specific surface area (B ≥ 0.100 m²/g) to create different functional zones within the rubber composition. The optimized filler characteristics provide localized reinforcement while maintaining overall flexibility, allowing both high reinforcing property and good ride comfort.
Solution Approach 2:
The patent optimizes the carbon black content parameter (C > 20 parts by mass per 100 parts rubber component) to achieve the right balance between reinforcing property and ride comfort. This parameter optimization ensures sufficient carbon black for abrasion resistance while preventing excessive stiffness that would harm ride comfort.
3Reliability
If rubber powder particle size is reduced to increase surface area for better reinforcement, then abrasion resistance improves, but shock absorption capability deteriorates
Solution Approach 1:
The patent applies inversion by selecting rubber powder with larger particle size (40 mesh or more) instead of the conventional approach of using finer particles. This inverted approach maintains sufficient surface area for reinforcement through optimized BET specific surface area (B ≥ 0.100 m²/g) while preserving shock absorption capability through the larger particle structure that can better dissipate impact energy.
Solution Approach 2:
The patent changes the particle size parameter to 40 mesh or more, which is coarser than conventional rubber powder. This parameter change, combined with controlling the BET specific surface area (B ≥ 0.100 m²/g), creates a unique balance where the larger particles provide better shock absorption while still achieving adequate reinforcement for abrasion resistance.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The design improves both abrasion resistance and ride comfort by optimizing the distribution and concentration of stress within the tire tread, resulting in enhanced reinforcing effects and shock absorption.
Implementation Method 1
the rubber powder has a particle size of 40 mesh or more, wherein B is 0.100 or more, where B represents a BET specific surface area
Implementation Method 2
C is greater than 20, where C represents a content, in parts by mass, of carbon black based on 100 parts by mass of the rubber component
Implementation Method 3
the tread part is composed of a rubber composition comprising a rubber component, carbon black, and a rubber powder
Data Source
Figure 1
AI summary
It is an object of the present invention to provide a tire having improved overall performance of abrasion resistance and ride comfort. Provided is a tire comprising a tread part, wherein the tread part is composed of a rubber composition comprising a rubber component, carbon black, and a rubber powder, wherein C is greater than 20, where C represents a content, in parts by mass, of carbon black based on 100 parts by mass of the rubber component in the rubber composition, wherein the rubber powder comprises a sulfur element, wherein the rubber powder has a particle size of 40 mesh or more, wherein B is 0.100 or more, where B represents a BET specific surface area, in m2/g, of the rubber powder, wherein T is 3.0 or more, where T represents a thickness, in mm, of the tread part, wherein A/T is less than 20, where A represents a content, in parts by mass, of the rubber powder based on 100 parts by mass of the rubber component in the rubber composition, and wherein (C×E)/(A×B) is greater than 1000, where E represents a BET specific surface area, in m2/g, of the carbon black.