Sliding Contact Surface Material for Dry Friction Wear Resistance
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Solution Overview
Problem
Polyester fiber-based sliding contact components face challenges with adhesiveness to resins and lack of heat resistance, particularly under dry frictional conditions and oscillating conditions, where they exhibit poor friction-proof and wear-proof characteristics.
Innovation Solution
A sliding contact surface-forming material using a woven fabric with a ply yarn structure composed of fluorine-containing resin fibers and polyphenylene sulfide (PPS) fibers, impregnated with a resol-type phenolic resin containing polytetrafluoroethylene (PTFE) powder, which enhances adhesiveness and heat resistance without surface treatment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If polyester fiber is used as reinforcing base, then water absorptivity is reduced and swelling is minimized, but adhesiveness to resin deteriorates
Solution Approach 1:
The patent applies parameter changes by annealing the polyester fiber at 150°C or below for 5 to 120 minutes in an organic solvent, which modifies the fiber's physical and chemical properties to improve functional group content and adhesiveness without changing the fiber material itself
Solution Approach 2:
The patent applies local quality by selectively treating only the polyester fiber surface through annealing with epoxy resin, while the bulk material properties remain unchanged, thereby improving local adhesiveness without affecting overall dimensional stability
2Stability of the object's composition
If polyester fiber is used as reinforcing base, then low water absorptivity is achieved, but heat resistance deteriorates
Solution Approach 1:
The patent applies composite materials by combining polyester fiber with bisphenol-based epoxy resin through annealing, creating a composite structure that leverages the low water absorptivity of polyester and the high heat resistance of epoxy resin to achieve both properties simultaneously
3Stability of the object's composition
If polyester fiber is used as reinforcing base, then low water absorptivity is achieved, but friction-proof and wear-proof characteristics deteriorate under dry frictional conditions
Solution Approach 1:
The patent applies parameter changes by annealing the polyester fiber to increase functional group content, which improves the chemical activity and surface properties of the fiber, thereby enhancing friction-proof and wear-proof characteristics under dry frictional conditions while maintaining water stability
Solution Approach 2:
The patent applies local quality by concentrating the annealing treatment on the fiber surface where friction and wear occur, improving local tribological properties without affecting the bulk material's water stability
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 solution provides improved friction-proof, wear-proof characteristics under dry frictional conditions, maintains low swelling, and exhibits excellent mechanical strength and dimensional accuracy, making it suitable for various applications including dry and water lubricating conditions.
Implementation Method 1
a sliding contact surface-forming material using a woven fabric with a ply yarn structure composed of fluorine-containing resin fibers and polyphenylene sulfide (PPS) fibers, impregnated with a resol-type phenolic resin
Implementation Method 2
containing polytetrafluoroethylene (PTFE) powder, which enhances adhesiveness and heat resistance without surface treatment
Implementation Method 3
improved friction-proof, wear-proof characteristics under dry frictional conditions
Implementation Method 4
maintains low swelling, and exhibits excellent mechanical strength and dimensional accuracy
Data Source
AI summary
A sliding contact surface-forming material with improved friction-proof and wear-proof characteristics under dry friction conditions such as in the open air, while keeping the low swelling, friction-proof, and wear-proof characteristics under moist atmosphere typically under water unchanged, wherein the sliding contact surface-forming material includes a reinforcing base impregnated with a resol-type phenolic resin having polytetrafluoroethylene resin dispersed therein, the reinforcing base being composed of a woven fabric formed by using, respectively as the warp and the weft, a ply yarn which is formed by paralleling at least two strands of a single twist yarn spun from fluorine-containing resin fiber and a single twist yarn spun from polyphenylene sulfide fiber, and by twisting them in the direction opposite to the direction in which the single twist yarns were spun.