POLYOLEFIN BOTTLES WITH GLOSSY SURFACE

摘要

A bottle having a glossy surface, with a gloss of at least 50 on its external surface. The bottle has its external surface formed from a polymer selected from linear polyethylene having a density of at least about 0.940 g/cm3, a melt index of less than 2.0 dg/min and a stress exponent of less than 1.5. Preferablythe polymer contains at lease 400 ppm of a fluoroelastomer processing aid. A process for making bottle with a glossy surface, consisting essentially of blow moulding polymer in continuous extrusion blow moulding apparatus or injection blow moulding apparatus, using a mould with a polished surface and a shear rate of less than 10 000 sec-1.