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Company News About How are three-layer co-extruded PPR pipes produced?

How are three-layer co-extruded PPR pipes produced?

2025-06-13
Latest company news about How are three-layer co-extruded PPR pipes produced?

How are three-layer co-extruded PPR pipes produced?

Three-layer co-extruded PPR pipes are produced using a specialized machine that feeds and combines three different plastic materials (PPR and possibly glass fiber) through a co-extrusion die. The process involves three single-screw extruders, a co-extrusion die, and a calibration/cooling system. 

Here's a more detailed breakdown:
1. Material Preparation:
Raw PPR materials (possibly with color masterbatches) are fed into three separate single-screw extruders. One extruder might handle the inner and outer PPR layers, while another handles a reinforcement layer like glass fiber. 

  1. 2. Extrusion and Combination:
    Each extruder melts and mixes the raw material, then feeds it through a specialized co-extrusion die. This die is designed to ensure uniform distribution and bonding of the three layers. 
    3. Shape Formation: As the molten material emerges from the die, it forms a continuous tube shape. The material flows through a calibration/sizing device to fix its dimensions and shape. 
    1. 4. Cooling and Sizing:
      The pipe is then cooled, typically using a vacuum sizing box and spray cooling tanks, to solidify the layers and maintain the desired pipe shape. 
      5. Cutting and Finishing:
      The cooled pipe is cut to the desired length, and the finished ends are cleaned up and inspected
      latest company news about How are three-layer co-extruded PPR pipes produced? 0

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