Fiber-Reinforced Strand with Elastomer Core and Thermoplastic Covering
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Solution Overview
Problem
Strands made of fiber-reinforced plastic used in driving parts, such as belts, gear wheels, or cams, require excellent slidability which is not adequately addressed by existing technologies.
Innovation Solution
A strand is developed with a core material containing a reinforcing fiber impregnated with an elastomer, and a covering layer made of a thermoplastic resin, specifically using a thermosetting elastomer and a polyamide resin with certain structural units, along with a filler material like potassium titanate whiskers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Weight of moving object
If a strand made of fiber-reinforced plastic is used for a driving part, then weight is reduced and flexibility is improved, but slidability is insufficient
Solution Approach 1:
The patent applies composite materials by combining carbon fiber reinforcement with elastomer and thermoplastic resin matrices. The core material uses carbon fiber impregnated with elastomer, while the covering layer uses thermoplastic resin, creating a multi-material composite structure that achieves both lightweight properties and improved slidability for driving parts
Solution Approach 2:
The patent applies local quality by differentiating the material properties of different parts of the strand. The core material provides structural strength and flexibility through carbon fiber and elastomer combination, while the covering layer provides slidability through thermoplastic resin. This localized functional differentiation resolves the contradiction between overall weight reduction and surface slidability
2Stability of the object's composition
If a strand made of fiber-reinforced plastic is used for a driving part, then flexibility is improved, but slidability is insufficient
Solution Approach 1:
The patent uses composite materials with carbon fiber providing flexibility and elastomer providing elastic recovery, while the thermoplastic resin covering layer provides slidability. This composite structure allows the strand to maintain flexibility in its core while achieving sufficient slidability at the surface for driving part applications
Solution Approach 2:
The patent implements local quality by assigning different material functions to different regions: the core material (carbon fiber + elastomer) provides flexibility and structural integrity, while the covering layer (thermoplastic resin) provides slidability. This regional functional specialization resolves the contradiction between flexibility and slidability
3Ease of operation
If traditional materials are used for driving parts, then slidability is adequate, but weight is excessive and driving properties are poor
Solution Approach 1:
The patent applies parameter changes by modifying the material composition parameters - using carbon fiber instead of traditional metal fibers, elastomer instead of traditional thermosetting resins, and thermoplastic resin with specific structural units (70 mol% or more from xylylenediamine and α,ω-linear aliphatic dicarboxylic acid) to achieve both weight reduction and maintained/improved slidability
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 strand achieves excellent slidability, lightweight properties, and improved driving properties, including reduced damage during friction and enhanced flexibility, making it suitable for use in driving mechanisms.
Implementation Method 1
a core material containing a reinforcing fiber impregnated with an elastomer
Implementation Method 2
slidability is required
Data Source
AI summary
To provide a strand having excellent slidability, a driving part, a method for producing a strand, and a winding Body. A strand including a core material containing a reinforcing fiber impregnated with an elastomer, and a covering layer containing a thermoplastic resin. A driving part including a first member including a strand, and a second member being in contact with the strand of the first member and containing a thermoplastic resin.