Patent ID: 7807096

Claim:
A method of using a polished mold to prepare a single layer hollow packaging by injection blow molding, comprising: obtaining a metallocene produced-polyethylene having: a density of from 0.910 up to 0.966 g/cm 3 , a melt index MI 2 of from 0.5 g/10 min to 2.5 g/10 min; preparing a single layer hollow packaging by injection blow molding said polyethylene, said hollow packaging having an external surface gloss of at least 30 and an internal surface gloss of at least 30 (as measured using the method of standard test ASTM D 2457-90) when injection blow molded with a non-porous mold; and where said polyethylene is produced by polymerizing ethylene in the presence of a metallocene catalyst selected from the group consisting essentially of ethylene bis-(tetrahydroindenyl) zirconium dichloride, ethylene bis-(indenyl)zirconium dichloride, and bis-(n-butylcyclopentadienyl) zirconium dichloride.