High-Temperature Transfer Hose With Flexible PPS Fiber Cover
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Solution Overview
Problem
Existing flexible hoses for high-temperature applications are either heavy, stiff, and inflexible, or susceptible to corrosion and hydrolysis, with significant cost and weight disadvantages, limiting their dynamic performance and service life.
Innovation Solution
A flexible hose with a covering made of at least 20% by weight of polyphenylene sulfide (PPS) and/or polyoxadiazole (POD) staple fibers, combined with suitable elastomers and thermoplastics, providing enhanced temperature resistance and flexibility without glass fibers, which are prone to hydrolysis.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If PTFE pipes or PTFE corrugated pipes with stainless steel braiding are used for high-temperature applications, then temperature resistance is improved, but weight increases and flexibility decreases
Solution Approach 1:
The patent uses a composite material structure combining PTFE (polytetrafluoroethylene) as the inner tube material with a woven fabric cover made of heat-resistant synthetic fibers. This composite construction provides high-temperature resistance while maintaining flexibility and reducing weight compared to solid PTFE pipes with metal braiding.
2Temperature
If PTFE pipes or PTFE corrugated pipes with stainless steel braiding are used for high-temperature applications, then temperature resistance is improved, but flexibility and dynamic performance worsen
Solution Approach 1:
The patent employs a flexible PTFE inner tube combined with a woven fabric cover that allows the hose to bend and flex. This structure provides temperature resistance while maintaining flexibility for dynamic applications, unlike rigid PTFE pipes with stiff metal braiding.
3Ease of operation
If glass fibers are used in the flexible covering, then flexibility is improved, but susceptibility to hydrolysis increases at high temperatures
Solution Approach 1:
The patent changes the material parameter from glass fibers to heat-resistant synthetic fibers (such as aramid, polyacrylonitrile, or polyester) that maintain flexibility while providing resistance to hydrolysis and oxidation at high temperatures, thereby improving reliability.
4Ease of operation
If glass fibers are used in the flexible covering, then production complexity increases due to special personal protection measures
Solution Approach 1:
The patent replaces glass fibers with synthetic fibers that are safer and easier to process, eliminating the need for special personal protection measures during production. This reduces production complexity while maintaining the flexibility requirement.
5Temperature
If the hose is designed for high-temperature applications with traditional materials, then temperature resistance is improved, but dynamic service life under high movement decreases
Solution Approach 1:
The patent uses a composite structure with PTFE inner tube and heat-resistant synthetic fiber woven cover that maintains structural integrity under high-temperature conditions while accommodating movement. This combination provides both temperature resistance and extended dynamic service life, unlike traditional materials that degrade under combined thermal and mechanical stress.
Data Source
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AI summary
The invention relates to a transfer hose which is design having multiple layers and contains at least one inner layer (1) and one transfer layer (4), wherein the transfer layer (4) is structured from at least 20 wt % of polyphenylensulfide (PPS) and/or polyoxadiazole (POD) and/or aramide (AR) and/or polyimide (PI) and/or polyether ether ketone (PEEK) and/or polyethylene-2,6-naphthalate (PEN) and/or polyphenylene (PPP) and/or polyphenylenoxide (PPO) and/or polyphenylensulfide (PPS) and/or polyphenylenether (PPE) and/or polybenzoxazole (PBO) and/or carbon fibers (CF) and/or metal fibers (MF). The hose-shaped article is in particular a turbocharger hose.