Modified PE Granule

High pressure method

Polyethylene can be divided into high pressure method, medium pressure method and low pressure method according to polymerization pressure.

The method of polymerizing ethylene into low density polyethylene by using oxygen or peroxide etc. as initiator. Ethylene enters the reactor after two-stage compression, and polymerizes into polyethylene under the pressure of 100-300 MPa, temperature of 200-300°C and the action of initiator, and the reactants are separated by decompression, so that the unreacted ethylene is recovered and recycled, and the molten polyethylene is extruded and pelletized after the addition of plastic additives.

The polymerization reactors used are tube reactor (tube length up to 2000 m) and kettle reactor. The tubular process has a one-way conversion rate of 20% to 34% and an annual production capacity of 100 kt for a single line, while the kettle process has a one-way conversion rate of 20% to 25% and an annual production capacity of 180 kt for a single line.