The correct full names of 1 and PP-R are three kinds of random polypropylene. PP-R pipe has impact resistance and pressure resistance. Good energy-saving effect, good toughness, high thermal insulation coefficient, corrosion resistance, rust prevention, non-toxic and tasteless. Without any sealing and adhesive, it can be completely fused by professional welding and one-time hot melt connection. The cracks caused by thermal expansion and cold contraction are fundamentally solved. It can be directly used for conveying pure water, drinking water, hot and cold water, heating, etc. 2.PVC material is a plastic decorative material. PVC is the abbreviation of PVC material, which is made of PVC resin as the main raw material, adding proper amount of antioxidant and modifier, and through mixing, calendering, vacuum pumping and other processes. PVC material has the characteristics of light weight, heat insulation, heat preservation, moisture resistance, flame retardancy and simple construction. There are many specifications, colors and patterns, which are very decorative. It can be used to decorate the interior walls and ceilings of rooms, and it is one of the most widely used decorative materials among plastic materials.
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