Rubber Composition Adhesion via Silane Coupling
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Solution Overview
Problem
Conventional rubber compositions used in conveyor belts experience deteriorated adhesiveness with reinforcing members due to environmental degradation, leading to insufficient peel strength and durability issues during the manufacturing and usage of layered belts.
Innovation Solution
A rubber composition is developed by compounding diene-based rubber with rosin-based resin, calcium carbonate, and carbon black, where the rosin-based resin is 3-15 parts by mass and calcium carbonate is 10-120 parts by mass per 100 parts of diene-based rubber, enhancing adhesiveness and peel strength while maintaining productivity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional rubber composition is used with reinforcing members, then the rubber product can be manufactured, but the adhesiveness deteriorates due to environmental degradation of reinforcing members during transportation, storage, and manufacturing processes
Solution Approach 1:
The patent applies preliminary action by incorporating a silane coupling agent into the rubber composition before the degradation occurs. This coupling agent pre-establishes chemical bonding capabilities that will actively react with the hydroxyl groups formed on the reinforcing member surface during environmental degradation, thereby maintaining adhesiveness throughout the manufacturing and storage processes rather than relying on post-degradation bonding
Solution Approach 2:
The silane coupling agent acts as an intermediary substance between the rubber composition and the reinforcing members. It forms a chemical bridge through silane-hydroxyl condensation reactions, creating a stable bonding interface that mediates the interaction between the rubber and the degraded reinforcing member surface, thereby preventing adhesion loss despite environmental exposure
2Strength
If conventional rubber composition is used for laminating multiple layers, then the conveyor belt can be manufactured, but the peel strength becomes insufficient particularly in the endless portion
Solution Approach 1:
The patent applies parameter changes by modifying the chemical composition parameters of the rubber compound, specifically incorporating silane coupling agents and controlling the ratios of rubber polymers, fillers, and curatives. These compositional parameter changes enable enhanced chemical bonding strength at the interface, resulting in superior peel strength and preventing rubber composition loss during the peeling process in endless portion manufacturing
3Reliability
If high adhesiveness is achieved through conventional means, then bonding between rubber members and reinforcing members is improved, but the durability in actual use remains insufficient
Solution Approach 1:
The patent applies composite materials by creating a multi-component rubber composition system that combines rubber polymers with silane coupling agents, fillers, and curatives. This composite formulation produces a vulcanized rubber with enhanced interfacial bonding characteristics that maintains both high adhesiveness and long-term durability under actual service conditions, including friction and impact with transported items
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 composition achieves excellent adhesiveness with reinforcing members, particularly in environmental degradation, resulting in improved durability and peel strength of conveyor belts, ensuring firm adhesion and high durability of rubber products.
Implementation Method 1
it has become increasingly important to use a silane coupling agent, which forms a chemical bond with the hydroxyl group on the surface of the reinforcing member
Data Source
Figure 1A~2B
AI summary
Provided is a rubber composition having excellent adhesiveness with reinforcing members, particularly reinforcing members in environmental degradation. The rubber composition is obtainable by compounding a rubber component containing a diene based rubber, a rosin based resin and a carbon black, wherein: a compounding amount of the rosin based resin is 3 parts by mass or more per 100 parts by mass of the diene based rubber.