Rubber-Phenolic Friction Material for Wear and Heat Resistance
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Solution Overview
Problem
Existing friction materials face challenges in achieving optimal performance, cost-effectiveness, and wide application due to limitations in wear resistance, corrosion resistance, high temperature resistance, and manufacturing costs.
Innovation Solution
A friction material composition comprising nitrile rubber, vulcanizing agents, thermoplastic phenolic resin, white carbon black, and optional fillers and anti-aging agents, combined with a specific preparation method involving plastication, mill-mixing, and vulcanization, to enhance mechanical strength and durability while reducing production costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional friction materials are used, then basic friction function is provided, but wear resistance, corrosion resistance and high temperature resistance are insufficient
Solution Approach 1:
The patent uses a composite material system comprising nitrile rubber as base material, thermoplastic phenolic resin as modifier, white carbon black as filler, and multiple additives. This composite structure provides enhanced wear resistance, corrosion resistance, and high temperature resistance while maintaining friction functionality across various applications.
Solution Approach 2:
The patent optimizes specific parameter ranges including nitrile rubber content (24-31%), thermoplastic phenolic resin content (24-31%), white carbon black content (15-25%), and vulcanizing agent content (0.35-1%). These parameter optimizations achieve the balance between improved reliability and maintained adaptability.
2Duration of action of stationary object
If high performance friction materials are developed, then wear resistance and durability are improved, but manufacturing costs increase
Solution Approach 1:
The patent optimizes the content ranges of various components to achieve cost-effective performance. Specifically, it controls the content of expensive additives while maintaining effective concentrations, and optimizes the ratio of base materials to extend service life without proportionally increasing cost.
Solution Approach 2:
The patent uses cost-effective materials such as white carbon black as primary filler and thermoplastic phenolic resin as modifier, which provide good performance at reasonable cost, making the friction material economically viable for widespread application.
3Manufacturing precision
If existing friction materials are used, then basic functionality is maintained, but manufacturing precision and consistency are limited
Solution Approach 1:
The patent specifies preliminary mixing of components before vulcanization, ensuring uniform distribution of additives and fillers in the rubber matrix. This preliminary action achieves consistent composition throughout the material, improving manufacturing precision.
Solution Approach 2:
The patent defines specific parameter ranges for each component and processing conditions, which standardizes the manufacturing process and ensures consistent product quality across different production batches.
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 friction material exhibits excellent wear resistance, corrosion resistance, and high temperature resistance, with significant cost advantages, making it suitable for various applications and capable of replacing existing materials with improved performance and reduced maintenance costs.
Implementation Method 1
0.35%-1% of a vulcanizing agent, 0.35%-0.6% of a vulcanization activator
Implementation Method 2
A friction material composition comprising nitrile rubber, vulcanizing agents, thermoplastic phenolic resin
Implementation Method 3
15%-25% of white carbon black, and optionally: 0%-25% of a filler
Implementation Method 4
1.5%-2.2% of a plasticizer
Data Source
AI summary
A friction material, a preparation method therefor, and a friction part. The friction material contains the following components by weight percentage: 24%-31% of a nitrile rubber, 0.35%-1% of a vulcanizing agent, 0.35%-0.6% of a vulcanization activator, 0.4%-0.8% of a promoter, 0.06%-0.11% of a scorch inhibitor, 1.5%-2.4% of ZnO, 24%-31% of a thermoplastic phenolic resin, 1.5%-2.2% of a plasticizer and 15%-25% of white carbon black, and optionally: 0%-25% of a filler, 0-0.8% of an anti-aging agent, and 0-2.4% of MgO.