Composite Fiber Hose Structure for High-Temperature Flexibility
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Solution Overview
Problem
Current high-temperature hoses require additional design measures for heat protection and have limitations in flexibility and weight due to expensive aramid materials, which are necessary for temperatures above 150°C, especially 200°C and 250°C.
Innovation Solution
A hose design featuring an inner layer with a reinforcement layer comprising at least 15% by weight of PAC or MAC fibers, combined with other high-temperature resistant fibers such as meta-aramid, polyphenylene sulfide, and glass fibers, eliminating the need for additional heat protection measures and enhancing flexibility and compactness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If aramid fibers are used for high-temperature resistance above 150°C, then temperature resistance is improved, but cost and weight increase significantly
Solution Approach 1:
The patent uses a composite fiber structure combining acrylic fibers (PAC/MAC) with aramid fibers in the reinforcing layer. The acrylic fibers provide base structure and flexibility while the aramid fibers (at least 15 wt.%) provide high-temperature resistance, creating a composite material that achieves temperature resistance above 150°C without the full weight and cost penalty of pure aramid construction
Solution Approach 2:
The patent changes the compositional parameters of the reinforcing layer by specifying that PAC/MAC fibers constitute at least 15 wt.% of the total reinforcing layer weight. This parameter adjustment allows the hose to achieve adequate temperature resistance through the synergistic effect of fiber combinations rather than relying solely on expensive aramid materials
2Temperature
If aramid fibers are used for high-temperature resistance above 150°C, then temperature resistance is improved, but cost increases significantly
Solution Approach 1:
The patent employs composite materials by combining PAC/MAC acrylic fibers with aramid fibers in a specific ratio (aramid at least 15 wt.%). This composite approach reduces manufacturing cost by substituting some expensive aramid fibers with more economical acrylic fibers while maintaining adequate temperature resistance for applications above 150°C
Solution Approach 2:
The patent optimizes the compositional parameter of the reinforcing layer by setting the aramid fiber content at a minimum of 15 wt.%, which balances cost and performance. This parameter optimization allows manufacturers to reduce aramid content from traditional high levels while still achieving the required temperature resistance, thereby lowering material costs
3Temperature
If additional heat protection measures are applied for temperatures above 250°C, then temperature resistance is improved, but device complexity and weight increase
Solution Approach 1:
The patent uses a composite fiber structure in the reinforcing layer combining PAC/MAC acrylic fibers with aramid fibers. This composite material provides inherent high-temperature resistance capable of withstanding temperatures above 250°C without requiring additional heat protection layers or structural modifications, thereby maintaining hose structure simplicity
Solution Approach 2:
The reinforcing layer with the specific fiber composition (at least 15 wt.% aramid combined with PAC/MAC fibers) serves multiple functions simultaneously: it provides structural reinforcement, ensures flexibility, and delivers high-temperature resistance above 250°C. This multi-functionality eliminates the need for separate heat protection measures, reducing overall device complexity
4Temperature
If aramid fibers are used for high-temperature resistance, then temperature resistance is improved, but flexibility decreases
Solution Approach 1:
The patent creates a composite fiber structure combining rigid aramid fibers (providing temperature resistance) with more flexible PAC/MAC acrylic fibers. This composite construction maintains hose flexibility while achieving the required temperature resistance above 150°C, as the acrylic fiber component contributes to the overall flexibility of the reinforcing layer
Solution Approach 2:
The patent applies different fiber types in specific proportions within the reinforcing layer, with PAC/MAC fibers making up at least 15 wt.%. This local quality distribution ensures that flexibility is maintained in regions where acrylic fibers are present, while temperature resistance is provided by the aramid fiber network, achieving both properties simultaneously
Data Source
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AI summary
The invention relates to a hose comprising an inner layer 1 and a reinforcing layer 2 arranged above it, wherein the reinforcing layer comprises fibers that are PAC fibers and/or MAC fibers. The hose is suitable as a temperature-resistant hose for temperatures above 150 °C, preferably above 200 °C.