How do you make HDPE?

HDPE is made by applying intense heat to petroleum - a process known as 'cracking' - to produce ethylene gas. Under controlled conditions, these gas molecules link together to form long chains or polymers and produce polyethylene - a substance that looks a bit like porridge. This substance is then forced through holes into long strings, which in turn are cut to form granules.

The resulting polymer is strong and resistant to temperature and can be tinted in a variety of colours, or translucent. These properties make it particularly appropriate for the food and drink packaging market.