LLDPE Partical

production

Linear low-density polyethylene to ethylene as the main raw material, with a small amount of α-olefins (such as 1-butene-1, 1-octene, etc.), under the action of the catalyst by high-pressure or low-pressure gas-phase fluidized bed polymerization, the structural formula -[CH2-CH2]n-, the reaction out of the material by the pelleting, drying, sent to the packaging.

LLDPE Partical production starts with transition metal catalysts, especially of the Ziegler or Philips type. New processes based on cyclic olefin metal derivative catalysts are another option for LLDPE production. The actual polymerization reaction can be carried out in solution and gas phase reactors. Typically, octene is copolymerized with ethylene to produce butene in a solution phase reactor. Hexene is polymerized with ethylene in a gas phase reactor. The LLDPE resin produced in the gas phase reactor is in the form of pellets and can be sold as powder or further processed into pellets. Linear low density polyethylene is usually characterized by melt index and density. The melt index reflects the average molecular weight of the resin and is primarily controlled by the reaction temperature. The average molecular weight is independent of the molecular weight distribution (MWD). Catalyst selection affects the MWD. Density is determined by the concentration of monomer used for copolymerization in the polyethylene chain. The concentration of copolymerization monomer controls the number of short branched chains (the length of which depends on the type of copolymerization monomer) and thus the density of the resin. High-pressure LDPE has long branched chains, while LLDPE Partical has only short branched chains.