Rubber Composition with Controlled Crumb Sulfur for Tear Resistance
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Tire manufacturers face challenges in reducing the cost of rubber compositions without compromising tire performance, particularly in achieving excellent tear resistance properties.
Innovation Solution
A rubber composition comprising an elastomer, a reinforcing filler, and a rubber crumb with controlled sulfur and accelerator levels, where the sum of these components is less than or equal to 5 parts by weight per 100 parts of elastomer, enhancing tear resistance without compromising cohesion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If rubber crumb with high sulfur and accelerator content is used, then cost is reduced, but tear resistance deteriorates
Solution Approach 1:
The patent applies parameter changes by precisely controlling the sulfur level (0.1-3 phr) and accelerator level (0.1-3 phr) in the rubber crumb, ensuring their sum does not exceed 5 phr. This optimization of chemical composition parameters enables the crumb to achieve excellent tear resistance while maintaining cost-effectiveness through controlled ingredient levels.
2Quantity of substance
If rubber crumb with high sulfur and accelerator content is used, then cost is reduced, but cohesion deteriorates
Solution Approach 1:
The patent optimizes the chemical parameters of the rubber crumb by limiting sulfur to 0.1-3 phr and accelerator to 0.1-3 phr, with their sum not exceeding 5 phr. This controlled composition maintains the cohesive properties of the rubber crumb while achieving cost reduction, preventing the deterioration of compositional stability.
Data Source
AI summary
The invention relates to a rubber composition comprising at least one elastomer, a reinforcing filler, a crosslinking system and a crumb rubber, in which the sum of the sulphur content and the accelerator content of the crumb rubber is less than or equal to 5 parts by weight per 100 parts by weight of elastomer (phr), said crumb rubber containing a total sulphur content of less than or equal to 4 parts by weight per 100 party by weight of elastomer (phr) in the composition of the crumb.