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LEWA pumps offer the following advantages for polyethylene production:
LEWA supplies metering pumps and systems for ethylene polymerization which are used in processes including the following:
Application examples are:
Polyethylene consists of hydrogen and carbon. The properties of polyethylene can be changed through copolymerization. It is very resistant to acids, alkaline solutions and other chemicals. Its range of application is limited because it softens at temperatures above 80 °C. Polyethylene is a thermoplastic produced from the polymerization of ethylene. It belongs to the polyolefins and is produced based on ethylene gas.
LDPE (soft polyethylene) results from the high-pressure process and HDPE (hard polyethylene) from the low-pressure process. In both production methods, it appears first as a viscous fluid.
Source: Wikipedia, February 2012