Polyethylene is a thermoplastic polymer consisting of long chains produced by combing the ingredient monomer ethylene (IUPAC name ethene). It is manufactured from ethylene through gas phase polymerization in presence of a catalyst such as Ziegler Natta or Chromium (Future) in BCPL. Linear low-density polyethylene (LLDPE) is a substantially linear polymer (polyethylene), with significant numbers of short branches, commonly made by copolymerization of ethylene with longer-chain olefins. HDPE has a low degree of branching and thus stronger intermolecular forces and tensile strength.
HDPE is used in products and packaging such as milk jugs, detergent bottles, margarine tubs, garbage containers and water pipes.