1, different characteristics: PE materials also include industrial ethylene and a small amount of α -olefin polymers. Pp material can resist the corrosion of acid, alkali, salt solution and various organic solvents below 80℃, and can be decomposed under high temperature and oxidation. PVC material is white powder with amorphous structure, with low branching degree and poor stability to light and heat. In the application of PU, the solvent in the slurry is evaporated by heating evaporation.

2. Different properties: polycarbonate is a polymer with carbonate groups on its molecular chain. Polyethylene is a thermoplastic resin prepared by ethylene polymerization. Polypropylene is a polymer formed by addition polymerization of propylene. It is a white waxy substance. PVC material, namely polyvinyl chloride, is one of the largest plastic products in the world. Polyurethane is a new type of organic polymer material.

3. Different uses: PU applications involve light industry, chemical industry, electronics, textiles and so on. PVC materials are used to make plugs, sockets, switches and cables. Pp material is mainly used as parts of automobiles and electrical appliances, as well as various containers. More than half of PE materials are used for film products, followed by pipes, injection molding products and wire coatings. PC materials are used to manufacture large lampshades, protective glasses, left and right eyepiece tubes of optical instruments, etc.

Extended data:

Precautions:

1. When installing PP pipe, the influence of ambient temperature on installation quality should be considered. Generally, it is not suitable for construction and installation when the temperature is higher than 40℃ or lower than 0℃.

2. Due to the large expansion coefficient of PP pipeline, thermal compensation should be considered during installation. Generally, natural compensation is given priority to, such as using square expansion joints.

3. When the 3.PP pipe is laid overhead, it should be supported by a pipe rack, which can be made of angle steel, split steel pipe and other materials, so that the reinforced polypropylene can freely expand and contract on the pipe rack.

4. When the PP tube needs to be hidden. Trench laying is recommended, and pipelines are generally welded. If it needs to be buried underground for special reasons, it should be buried directly in the form of casing to avoid mixing hard impurities in backfill soil and reporting pipeline damage.

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