Tyre for a manually transportable vehicle wheel
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Solution Overview
Problem
Current tire solutions for manually transportable vehicles, such as scooters and roller skates, face challenges in achieving a balance between rolling resistance and grip without compromising other performance metrics like wear resistance, especially on wet surfaces.
Innovation Solution
A tire composition incorporating a diene elastomer, reinforcing filler, and a crosslinking system with specific co-crosslinking agents like acrylate derivatives, which enhance the tire's adhesion and resistance properties.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Duration of action of stationary object
If polyurethane-based composition is used for high abrasion resistance, then wear resistance is improved, but rolling resistance and wet grip performance deteriorate
Solution Approach 1:
The patent changes the chemical composition parameters by using a diene elastomer base with specific crosslinking agents (peroxide and sulfur) and additives (silica, carbon black) to achieve optimal balance between wear resistance and rolling resistance, moving away from conventional polyurethane formulations
Solution Approach 2:
The patent creates a composite rubber composition combining diene elastomer, reinforcing fillers (silica, carbon black), crosslinking agents, and various additives to achieve synergistic effects that simultaneously improve wear resistance while reducing rolling resistance
2Loss of energy
If tire composition is optimized for low rolling resistance, then energy efficiency is improved, but grip performance on wet surfaces deteriorates
Solution Approach 1:
The patent applies different functional components in specific regions of the tire composition - hydrophilic silica and specific crosslinking densities in the tread surface for wet grip, while optimizing overall composition for low rolling resistance through controlled polymer chain flexibility
Solution Approach 2:
The patent adjusts crosslinking density parameters and filler surface area parameters to create a composition that maintains optimal balance between grip and rolling resistance, using peroxide-sulfur crosslinking systems with controlled ratios
3Duration of action of stationary object
If crosslinking density is increased to improve wear resistance, then durability is improved, but rolling resistance increases
Solution Approach 1:
The patent optimizes crosslinking density by controlling the ratio and types of crosslinking agents (peroxide and sulfur), creating a balanced crosslinking network that provides wear resistance while maintaining polymer chain flexibility for low rolling resistance
Solution Approach 2:
The patent uses moderate crosslinking density rather than maximum crosslinking, achieving sufficient wear resistance while avoiding excessive crosslinking that would increase rolling resistance, using controlled amounts of crosslinking agents
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 tire composition improves rolling resistance and grip performance on wet surfaces while maintaining wear resistance, offering a better compromise of properties compared to existing solutions.
Implementation Method 1
a crosslinking system comprising at least one radical polymerization initiator, and a crosslinking co-agent chosen from the group consisting of (meth)acrylate compounds, maleimide compounds, allylic compounds, vinyl compounds and their mixtures
Data Source
AI summary
The invention relates to tyres for a manually transportable vehicle wheel, comprising a composition based on at least one diene elastomer, at least one reinforcing filler, and a cross-linking system comprising at least one radical polymerization initiator, and a co-crosslinking agent selected from the group consisting of (meth)acrylate compounds, maleimide compounds, allyl compounds, vinyl compounds and mixtures thereof.