What is a pvc plastic pipe?
PVC, the full name of which is polyvinyl chloride, is mainly composed of polyvinyl chloride, and other components are added to enhance its heat resistance, toughness and ductility. The top layer of this surface film is paint, the main component in the middle is PVC, and the bottom layer is adhesive.
It is a kind of synthetic material that is deeply loved, popular and widely used in the world today, and its global usage ranks second among all kinds of synthetic materials. The essence of PVC pipe is a kind of vacuum plastic film, which is used for surface packaging of various panels, so it is also called decorative film and adhesive film, and is used in many industries such as building materials, packaging and medicine.
Advantages of pvc plastic pipe
1. It has good tensile and compressive strength, but its flexibility is not as good as other plastic pipes.
2. Low fluid resistance: the wall of PVC-U pipe is very smooth, and the resistance to fluid is very small, and the roughness coefficient is only 0.009. Its water delivery capacity can be increased by 20% compared with the same caliber cast iron pipe and 40% compared with the concrete pipe.
3. Excellent corrosion resistance and drug resistance: PVC-U pipe has excellent acid resistance, alkali resistance and corrosion resistance, and is not affected by moisture and soil pH, so there is no need for anti-corrosion treatment when laying pipes.
4. Good watertightness: The installation of PVC-U pipe has good watertightness whether it is connected by adhesive or rubber ring.
Application scope of PVC pipe in the market
In the construction market, there are two kinds of PVC pipes used: one is pressure-resistant pipe and the other is pressureless pipe. Pressure-resistant tap water pipes and hot water supply pipes are widely used in foreign buildings, and PVC pipes are mostly used. Small diameter PVC pipes (UPVC pipes, CPVC pipes) have the advantages of low cost, corrosion resistance and no need for frequent maintenance and replacement.
Large diameter PVC pressure pipe (diameter 100-900mm) replaces cast iron pipe and reinforced small mud pipe.
The water supply system has good fluidity, corrosion resistance and light weight. Save electricity and have good water quality. Using PVC core foam pressureless pipe as indoor sewer and rainwater system pipeline can solve the noise problem of indoor sewer well. The public sewage pipe adopts pressureless PVC pipe. In addition, building thin pipes and underground cable protection pipes are another market for Pvc pipe production lines. At present, the varieties used in China are direct expansion pipe, double-wall pipe and single-wall corrugated pipe.
Process flow of pvc plastic pipe production line
Pvc plastic pipe production line means that the main raw material for making pipes is PVC resin powder. The types of pvc plastic pipe production lines are generally divided into drainage pipes, water supply pipes, electric conduits, cable sheathing pipes and other products according to the uses of pipes.
Production technology → preparation of raw materials and additives → mixing → conveying and feeding → forced feeding → conical twin-screw extruder → extrusion die → setting sleeve → spraying vacuum setting box → soaking cooling water tank → ink printer → crawler tractor → knife cutter → pipe rack stacking → finished product inspection and packaging.
The above is the introduction of the advantages and application scope of pvc plastic pipe, hoping to help everyone.