Crumb Rubber Composition for Tyre Tread Performance
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Solution Overview
Problem
Tyre manufacturers face challenges in reducing the costs of rubber compositions without compromising the performance of tyres, particularly in achieving optimal rolling resistance, wear resistance, and tear strength.
Innovation Solution
A rubber composition comprising an elastomer, a reinforcing filler, a crosslinking system, and a crumb rubber with an isoprene elastomer content greater than 50 phr and a chloroform extract of less than 10,000 g/mol molecular weight, which is used in the tread of tyres for improved performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If conventional crumb rubber is used in tyre compositions, then cost reduction is achieved, but rolling resistance, wear resistance and tear strength properties deteriorate
Solution Approach 1:
The patent applies parameter changes by specifying precise compositional parameters for the crumb rubber: isoprene elastomer content greater than 50 phr and chloroform extract molecular weight less than 10,000 g/mol. These parameter specifications transform conventional crumb rubber into a optimized material that simultaneously achieves cost-effectiveness and superior performance in rolling resistance, wear resistance, and tear strength.
2Reliability
If crumb rubber with high isoprene elastomer content and low molecular weight chloroform extract is used, then performance properties are improved, but manufacturing complexity increases
Solution Approach 1:
The patent specifies precise compositional parameters for the crumb rubber: isoprene elastomer content greater than 50 phr and chloroform extract molecular weight less than 10,000 g/mol. These parameter specifications transform conventional crumb rubber into a optimized material that simultaneously achieves cost-effectiveness and superior performance in rolling resistance, wear resistance, and tear strength.
Data Source
AI summary
A rubber composition is based on at least an elastomer, a reinforcing filler and a crosslinking system and a crumb rubber, said crumb having an isoprene elastomer content of greater than 50 phr in the composition of the crumb and a chloroform extract with a weight-average molecular weight of less than 10 000 g/mol.