PVC plastic is yellowish, translucent and shiny. Transparency is better than polyethylene and polypropylene, but worse than polystyrene. With the different dosage of additives, it can be divided into soft PVC and hard PVC. Soft-packed products are soft and tough and sticky to the touch. The hardness of hard products is higher than that of low density polyethylene, but lower than that of polypropylene, and whitening will occur at the bending point. Common products: plates, pipes, soles, toys, doors and windows, wire sheaths, stationery, etc. It is a polymer material, which uses chlorine atoms to replace hydrogen atoms in polyethylene.
PVC can be divided into soft PVC and hard PVC. Among them, hard PVC accounts for about 2/3 of the market and soft PVC accounts for 1/3. Soft PVC is generally used for floors, ceilings and leather surfaces, but its application is limited because it contains softener (which is also the difference between soft PVC and hard PVC), which is easy to become brittle and difficult to store. Rigid PVC contains no softener, so? Good flexibility, easy molding, not easy to break, non-toxic and pollution-free, long storage time, so it has a lot of? Development and application value. Hereinafter referred to as PVC. The essence of PVC is a kind of vacuum plastic film, which is used for surface packaging of various panels, so it is also called decoration? Film and adhesive film are used in many industries such as building materials, packaging, medicine and so on. Among them, the building materials industry accounts for the largest proportion, accounting for 60%, followed by the packaging industry and several other small-scale application industries.
1, PVC PVC plastic pipe equipment molding production process route
The extrusion molding of PVC plastic pipe can be done by single-screw extruder or twin-screw extruder. The production process routes of plastic pipes extruded by the two extruders are slightly different.
( 1)? Production process of PVC pipe extruded by single screw extruder
The materials used for extrusion molding of pipes are measured according to the formula requirements → high-speed hot mixing of raw materials → cooling of evenly mixed materials → granulation → plasticizing of molten raw materials by extruder → molding of pipe blanks by die → cooling and shaping → cooling of pipes → traction → cutting → flaring → quality inspection → weighing and warehousing.
(2)? Production process of PVC pipe extruded by twin-screw extruder
The materials used in the extrusion pipe are measured according to the formula requirements → High-speed hot mixing of raw materials → Cooling of the evenly mixed materials → Plasticizing the raw materials into a molten state by an extruder → Moulding the pipe blank → Cooling and setting → Cooling the pipe → Traction → Cutting → Flaring → Quality inspection → Weighing and warehousing.
I believe that through the above introduction, everyone has a certain understanding of the nature, function and production technology of PVC plastics. Therefore, Bian Xiao suggested that everyone choose the appropriate PVC plastics according to their own needs in life, so that life is full of convenience. A correct choice is the beginning of your happy life. When choosing, you should not only be cheap, but also choose the one that suits you. The above is the main content that Bian Xiao brought to you today. If you have any questions you don't understand, you can continue to explore them on the Internet yourself. Don't be shy to ask questions you don't understand. I hope Bian Xiao's introduction can help you.
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