Sheet Transport Roller Rubber Composition with Coumarone-Indene Resin
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Solution Overview
Problem
Rubber compositions for sheet transport rollers face challenges in maintaining a high friction coefficient and wear resistance, particularly when using ethylene-propylene-diene monomer (EPDM) due to the influence of paper dust and the decrease in wear resistance when incorporating coumarone-indene resin with a peroxide crosslinking agent.
Innovation Solution
A rubber composition containing an ethylene-α-olefin-diene copolymer as the base rubber, a sulfur-based crosslinking agent, and a coumarone-indene resin, which improves the friction coefficient and wear resistance of the cured product.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Force
If a peroxide crosslinking agent is used with coumarone-indene resin to enhance grip force, then the friction coefficient is improved, but wear resistance decreases
Solution Approach 1:
The patent changes the crosslinking agent from peroxide to sulfur-based crosslinking agent, which fundamentally alters the crosslinking mechanism and chemistry. This parameter change resolves the contradiction by enabling the coumarone-indene resin to contribute positively to both friction coefficient and wear resistance through sulfur-based crosslinking, whereas peroxide crosslinking caused degradation of wear resistance
Solution Approach 2:
The patent creates a composite rubber composition combining ethylene-α-olefin-diene copolymer with coumarone-indene resin, where the resin content is optimized at 5-20 parts by mass per 100 parts of base rubber. This composite structure allows the resin to enhance grip force while the sulfur-based crosslinking system maintains wear resistance, achieving both improved friction coefficient and durability
2Ease of manufacture
If EPDM is used as base rubber for cost and ozone resistance, then manufacturing cost and chemical resistance are improved, but friction coefficient decreases due to paper dust influence
Solution Approach 1:
The patent creates a composite rubber composition combining ethylene-α-olefin-diene copolymer with coumarone-indene resin, where the resin content is optimized at 5-20 parts by mass per 100 parts of base rubber. This composite structure allows the resin to enhance grip force while the sulfur-based crosslinking system maintains wear resistance, achieving both improved friction coefficient and durability
Solution Approach 2:
The patent changes the crosslinking agent from peroxide to sulfur-based crosslinking agent, which fundamentally alters the crosslinking mechanism and chemistry. This parameter change resolves the contradiction by enabling the coumarone-indene resin to contribute positively to both friction coefficient and wear resistance through sulfur-based crosslinking, whereas peroxide crosslinking caused degradation of wear 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 proposed composition enhances the friction coefficient and wear resistance of the sheet transport roller, providing improved performance and processability while maintaining good kneading workability.
Implementation Method 1
a sulfur-based crosslinking agent
Data Source
AI summary
A rubber composition capable of manufacturing a sheet transport roller having an excellent friction coefficient and wear resistance. A sheet transport roller rubber composition contains an ethylene-α-olefin-diene copolymer as a base rubber, a sulfur-based crosslinking agent, and a coumarone-indene resin. It is preferable that the sheet transport roller rubber composition be obtained by mixing the base rubber and the coumarone-indene resin at a temperature equal to or higher than a softening point of the coumarone-indene resin to prepare a mixture, and then mixing this mixture with a sulfur-based crosslinking agent.