High Density vs Low Density

Low density polyethylene

Low density polyethylene (LDPE) is the most widely used material in plastic bags. Some familiar applications include heavy duty garbage bags, press seal bags and boutique retail carry bags. It is strong, has high tear resistance, is clear and is easy to print on.

Minimum Thickness = 25 microns
Maximum Thickness = 150 microns. 

High density polyethylene (HDPE)

High density polyethylene is used for making singlet bags that are used by supermarkets. In its natural form it has a frosted appearance and makes a crackly/crinkly sound when crushed. It is stronger than LDPE but is not as tear resistant.

Minimum Thickness = 15 microns
Maximum Thickness = 70 microns.

HDPE is typically used for applications where a very thin cost effective bag is required. The classic high density application is liner bags where tear resistance is not required.

Please call us if you have any questions about what is the right material for your application.