PARA Barrier Fluid Hose for Low Gas Diffusion Under Pressure
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Solution Overview
Problem
Fluid hoses used in transporting hydrogen or fuels face challenges in reducing gas diffusion through their walls, leading to potential corrosion of metallic components, and existing solutions are inadequate in providing a high blocking effect against gases like oxygen, water vapor, and refrigerants across a wide temperature range.
Innovation Solution
A fluid hose design featuring an outer elastomer layer, a strength carrier, an intermediate elastomer layer, and a barrier layer composed of polyarylamide (para), which effectively reduces gas diffusion by forming a composite structure that absorbs pressure and provides high temperature resistance, thereby preventing gas penetration from both inside and outside the hose.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of substance
If conventional hose materials are used, then the hose is flexible and easy to manufacture, but gas diffusion through the hose wall is high
Solution Approach 1:
The patent applies composite materials by combining polyarylamide (PARA) as the barrier layer with elastomer layers. The PARA layer provides exceptional gas barrier properties while the elastomer layers maintain flexibility and mechanical performance, creating a multi-layer composite hose structure that resolves the contradiction between gas diffusion prevention and structural complexity.
Solution Approach 2:
The hose is segmented into multiple functional layers: an inner elastomer layer, a PARA barrier layer, and an outer elastomer layer. Each layer performs a specific function - the elastomer layers provide flexibility and mechanical strength while the PARA layer specifically targets gas diffusion prevention, allowing optimization of each layer independently.
2Reliability
If a barrier layer is added to reduce gas diffusion, then the barrier effect against gases improves, but the hose structure becomes more complex
Solution Approach 1:
The patent applies local quality by placing the PARA barrier layer specifically at the position where gas diffusion needs to be prevented (the inner layer facing the conveyed fluid). This localized application of high-performance material provides maximum barrier effect where needed while keeping the overall structure manageable.
3Loss of substance
If polyarylamide barrier layer is used to prevent gas diffusion, then oxygen and water vapor barrier performance improves, but manufacturing complexity increases
Solution Approach 1:
The patent utilizes the unique properties of polyarylamide, particularly its ability to be processed from concentrated sulfuric acid solutions. By controlling the chemical parameters (using concentrated H2SO4 as solvent and controlling water content), the manufacturing process achieves both high barrier performance and reasonable manufacturability.
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 fluid hose achieves a significant reduction in gas diffusion, maintaining structural integrity under high pressure and temperature, and preventing corrosion of metallic components, with a barrier effect that outperforms conventional materials in oxygen, water vapor, and refrigerant barrier performance.
Implementation Method 1
the barrier layer is designed to reduce diffusion of gas through the barrier layer
Data Source
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AI summary
The present invention relates to a fluid hose (100) for conveying a fluid, comprising: an outer layer (101) comprising an elastomer; a reinforcing element (103) arranged within the outer layer (101); an intermediate layer (105) comprising an elastomer and arranged within the reinforcing element (103); and a barrier layer (107) arranged within the intermediate layer (105) and delimiting a conduit interior (109) of the fluid hose (100) for conveying the fluid, wherein the barrier layer (107) is designed to reduce diffusion of gas through the barrier layer (107), and wherein the barrier layer (107) comprises a polyarylamide (PARA).