Oil and gas production handbook An introduction to oil and gas production

High-density polyethylene (HDPE) is used predominantly in the 
manufacture of blow-molded bottles for milk and household cleaners 
and injection-molded pails, bottle caps, appliance housings and toys. 
Low-density polyethylene (LDPE) is used in film applications due 
to its toughness, flexibility and relative transparency. Typically, 
LDPE is used to manufacture flexible films such as those used for 
plastic retail bags. LDPE is also used to flexible lids and bottles, in 
wire and cable applications for its stable electrical properties and 
processing characteristics.