Resin pipes are multi-layered composite pipes made primarily of thermoplastic resin, widely used in industry, municipal engineering, construction, automotive, and other fields. Their core technologies lie in material selection, structural design, manufacturing processes, and functional integration, meeting diverse needs such as pressure resistance, corrosion resistance, lightweight design, and long service life.
Core Materials and Structural Design
The performance advantages of resin pipes mainly stem from the synergistic effect of their multi-layered composite structure and high-performance materials:
Inner Layer (Transport Layer): Typically uses low-permeability, high-smoothness resin materials, such as nylon (PA), polyetheretherketone (PEEK), or modified polytetrafluoroethylene (PTFE), ensuring low fluid transmission resistance and minimal microbial growth, suitable for transporting food-grade or high-purity media. Surface roughness can be controlled to Ra≤0.8μm, approaching mirror-like smoothness.
Intermediate Reinforcing Layer: Used to improve load-bearing capacity and fatigue resistance. Common forms include:
Fiber braided layer (e.g., aramid, glass fiber)
Steel wire braided or wound layer
Glass fiber reinforced three-dimensional mesh structure. This layer significantly improves tensile strength (up to 60–80 MPa) and pulse life (over 2 million cycles).
Outer Layer (Protective Layer): Utilizes a modified resin coating that is UV resistant and weather-resistant, ensuring long-term outdoor use (up to 10 years or more), while also possessing flame-retardant properties (oxygen index of 28%–32%).
