Fiber-Reinforced Composite Pipe Layer Design
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Solution Overview
Problem
Existing fiber-reinforced composite pipes and cold/warm water piping systems face challenges in achieving both high strength and dimensional stability, particularly in severe temperature conditions, where traditional materials often compromise on workability, corrosion resistance, or ease of handling.
Innovation Solution
A fiber-reinforced composite pipe design featuring a three-layer structure with a polyolefin-based resin inner and outer layer, a glass fiber intermediate layer, and optional adhesive and gas barrier layers, along with a metal-reinforced composite pipe for improved thermal expansion and workability, forming a piping system with enhanced strength, stability, and ease of connection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If glass fiber is added to enhance strength, then strength is improved, but dimensional stability deteriorates
Solution Approach 1:
The invention uses a composite material consisting of polyolefin-based resin and glass fiber in specific proportions (glass fiber 1-40 wt%, polyolefin-based resin 60-98 wt%). This composite structure allows the glass fiber to provide strength enhancement while the polyolefin matrix maintains dimensional stability, resolving the contradiction between strength and dimensional stability.
2Ease of manufacture
If polyolefin-based resin is used for excellent moldability and heat resistance, then ease of manufacture is improved, but strength deteriorates
Solution Approach 1:
The invention creates a composite material where polyolefin-based resin (60-98 wt%) provides excellent moldability and heat resistance, while glass fiber (1-40 wt%) adds strength. This composite approach allows the material to maintain the processing advantages of polyolefin while gaining the mechanical strength of glass fiber reinforcement.
3Ease of operation
If homogenous pipes are connected for easy connection, then ease of operation is improved, but adaptability deteriorates
Solution Approach 1:
The invention creates a universal piping system where the fiber-reinforced composite pipe can be used for both cold water and warm water applications. The standardized three-layer structure and material composition allow the same pipe type to adapt to different temperature conditions and application requirements, maintaining ease of connection while improving adaptability.
Data Source
AI summary
The present invention provides a fiber-reinforced composite pipe serving as a multi-layered pipe material having high strength and high dimensional stability and excellent in workability and provides a cold/warm water piping system excellent in dimensional stability and improved in workability. The fiber-reinforced composite pipe of the invention comprises a first layer of tubular form containing a polyolefin-based resin, a second layer of tubular form containing a polyolefin-based resin, a glass fiber and a compatibilizing agent, and a third layer of tubular form containing a polyolefin-based resin, in which the second layer is disposed on the outer side of the first layer and the third layer is disposed on the outer side of the second layer; the ratio of the thickness of the second layer relative to the total thickness of the first, second and third layers is 0.3 or more and 0.8 or less; and the content of the polyolefin-based resin is 45 wt % or more and 84 wt % or less, the content of the glass fiber is 15 wt % or more and 45 wt % or less and the content of the compatibilizing agent is 0.5 wt % or more and 10 wt % or less in 100 wt % of the second layer.