Textile Reinforced Thermoplastic Hose Length Stability
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Solution Overview
Problem
High pressure thermoplastic hoses face issues with kinking, elongation, and burst pressure performance due to stiffness and material limitations, leading to potential leaks and reduced lifespan, especially in applications requiring flexibility and stability.
Innovation Solution
A high pressure textile reinforced thermoplastic hose design featuring a flexible inner tube with braided or spiralized yarn reinforcement and a parallel layer of multifilament yarns that run longitudinally, stabilized by a thermoplastic outer sheath, using a three-stage manufacturing process that includes extrusion, reinforcement, and outer sheath application, to maintain stability and flexibility while minimizing elongation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If stiff thermoplastic materials are used for high pressure hoses, then burst pressure performance is improved, but flexibility and kink resistance deteriorate
Solution Approach 1:
The hose combines multiple materials with different properties: an elastomeric inner tube for flexibility, textile reinforcement layers for strength and dimensional stability, and a thermoplastic outer sheath for chemical resistance and protection. This composite structure achieves both high burst pressure performance and flexibility without kinking.
2Ease of operation
If highly flexible elastomeric materials are used, then kink resistance is improved, but elongation under pressure worsens
Solution Approach 1:
The combination of elastomeric material with textile reinforcement layers creates a composite structure where the elastomer provides flexibility and kink resistance while the textile layers constrain elongation under pressure, achieving both desired properties simultaneously.
Solution Approach 2:
Different layers of the hose have different local properties: the inner elastomeric layer is highly flexible for kink resistance, while the outer textile and thermoplastic layers are more rigid for length stability. Each layer performs its specific function to resolve the contradiction.
3Stability of the object's composition
If textile reinforcement is added to thermoplastic hoses, then dimensional stability is improved, but manufacturing complexity worsens
Solution Approach 1:
The manufacturing process combines extrusion of the elastomeric inner tube, application of textile reinforcement layers, and extrusion of the thermoplastic outer sheath into an integrated multi-stage process, achieving dimensional stability while managing manufacturing complexity through process integration.
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 hose exhibits improved kink resistance, stability in length, and enhanced burst pressure performance, with elongation controlled within ±1.5%, suitable for hydraulic and fluid conveyance applications, including those requiring electrical static dissipation and handling of flammable materials.
Implementation Method 1
The term 'thermoplastic' means materials which are solid at room temperature and which soften at an elevated temperature repeatedly
Data Source
AI summary
The invention is an improved high pressure hose used for hydraulic actuation and fluid conveyance of various liquid media under relatively high pressure. The hose has an inner tube of an elastomeric material that provides a fluid-carrying passageway. The inner tube is covered with a layer of braided yarn and a layer of textile yarn extending parallel to the axis of the fluid-carrying passageway, with an outer sheath of a thermoplastic material completing the hose.