Poly(ethene) finds application in a range of engineering processes including blow moulding, injection moulding, film, pipes and cable insulation. The properties of HDPE and LDPE are not the same, and their uses relate to this. In particular, LDPE (or LLDPE) is easier to use for making thin films, but weathers more rapidly than HDPE. HDPE is more chemically inert, and retains its structure to higher temperatures than LDPE, but is more rigid.
Blow moulding Containers for household and industrial chemicals, and for milk HDPE
Injection moulding Buckets, washing-up bowls, food storage boxes HDPELDPE/LLDPE
Film Food wrap, carrier bags, freezer bags, building sheet HDPELDPE/LLDPE
Pipe Drainage, drinking water HDPE
Cables Insulation on electrical cables LDPE/LLDPE
Photo: poly(ethene) packaging
graph: uses of poly(ethene)
Photo: poly(ethene) watering "can"
Photo: poly(ethene) packaging for milk
Photo: poly(ethene) cable insulation

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