Polyethylene deeper polymerization method, molecular weight, and chain structure, divided into high -density polyethylene (HDPE), low -density polyethylene (LDPE), and linear low -density polyethylene (LLDPE).
LDPE:
Nature: odorless, odorless, non -toxic, no gloss on the surface, milky white waxy particles, density of about 0.920 g/cm3, melting point 130 ℃ ~ 145 ℃. Insuvenow in water, slightly soluble in hydrocarbons. It can resist the erosion of most acid and alkali, with small water absorption, and can still maintain softness and high electrical insulation at low temperature.
Production process: There are two types of high -pressure tube method and kettle method. In order to reduce the reaction temperature and pressure, the pipeline method generally uses a low -temperature and high -active quotes to trigger the polymerization system. The main raw materials are based on high -purity ethylene. The aggregation reaction is performed under the conditions of 330 ° C, 150 ~ 300MPa. The melting polymer that causes aggregation in the reactor must pass through high -voltage, medium -voltage and low -pressure cooling, separation, and high -voltage circulating gases. After separation, send the entrance of high -voltage (30 mPa) compressor, while the low -voltage cycling gas is cooled and separated by the low -voltage (0.5 MPA) compressor after recycling. Cut the water in the water. When the granulation is made, the enterprise can add appropriate additives according to different application areas, and the particles can be packed by the factory.
Uses: It can be processed by injection molding, squeezing, and blowing plastic. It is mainly used as agricultural film, industrial packaging film, medicine and food packaging film, mechanical parts, daily necessities, building materials, wires, cable insulation, coating and synthetic paper.
LLDPE:
Nature: Because the molecular structure of LLDPE and LDPE is obviously different, the performance is also different. Compared with LDPE, LLDPE has excellent environmental stress -resistant cracking performance and electrical insulation, high heat resistance, anti -rushing and thorns resistance. Production process: LLDPE resin mainly uses a full -density polyethylene device to produce. The representative production process is the Innovene process and the UNIPOL process of UCC.
Uses: produce film, daily necessities, pipes, wires and cables, etc. through injection, extrusion, blowing plastic and other molding methods.
HDPE:
Nature: This color, cylindrical or flat round particles, the granules are smooth, the size of the particles should be 2 mm to 5 mm in any direction, there is no mechanical impurities, and heating plasticity. Powder is a white powder, and the qualified products are allowed to be slightly yellow. It is insoluble at normal solvents at normal temperature, but it can swell when it is touched for a long time in the medium -term contact with fats, aromatic hydrocarbons, and halogen. It is slightly soluble in toluene and acetic acid at 70 ° C. Heating in the air and oxidizing the effect of sunlight. Can resist the erosion of most acid and alkali. Little water absorption can still maintain softness at low temperature and high electrical insulation.
Production process: use gas phase and slurry method: two production processes.
Uses: Adopt injection molding, blowing plastic, squeezing, rolling plastic and other methods, producing various large and small hollow containers, daily necessities and industrial large -sized hollow containers, pipes, packaging bands and ligament bands, rope cables, fishing nets and weaving Fiber, wire and cable, etc.

 25kg/bag,27MT/20FCL