PVC pipes (divided into PVC - U pipes, PVC - M pipes and PVC - O pipes) are rigid polyvinyl chloride pipes. They are extruded by the hot - pressing method after polyvinyl chloride resin is mixed with stabilizers, lubricants, etc., and are the earliest developed and applied plastic pipes.
PVC - U pipes have strong corrosion resistance, are easy to bond, are low - priced, and are hard in texture. However, due to the exudation of PVC - U monomers and additives, they are only suitable for water supply systems where the conveying temperature does not exceed 45 °C. Plastic pipes are used in applications for drainage, wastewater, chemicals, heating and cooling fluids, food, ultra - pure liquids, slurries, gases, compressed air and vacuum systems.
PVC - O pipes, whose Chinese name is biaxially oriented polyvinyl chloride, are the latest evolutionary form of PVC pipes. Pipes manufactured by a special orientation processing technology are axially and radially stretched from PVC - U pipes produced by the extrusion method, so that the long - chain PVC molecules in the pipes are regularly arranged in two axes, obtaining new - type PVC pipes with high strength, high toughness, high impact resistance and anti - fatigue properties.
Production process: raw materials + additives preparation → mixing → conveying and feeding → forced feeding → conical twin - screw extruder → extrusion die → sizing sleeve → spray vacuum sizing tank → immersion cooling water tank → ink printer → crawler tractor → lifting - knife cutting machine → pipe stacking rack → finished product inspection and packaging.
PVC is being produced and applied worldwide at a growth rate of 4%. The growth rate of PVC in Southeast Asia is particularly remarkable, thanks to the urgent need for infrastructure construction in Southeast Asian countries. Among the materials that can produce three - dimensional surface films.
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Time：2024-07-25
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