Polyethylene Bags
Polyethylene bags are made from the most popular plastic resin used to make disposable bags. Polyethylene is manufactured into thin, flexible film used for holding, carrying and protecting a wide variety of products. They are made for food storage, waste removal, trash can liners, drum liners, retail, industrial or food product packaging and shopping. The construction, retail, medical and packaging industries all use polyethylene bags. They are made from plastic resin beads that are heated between 180 and 240 degrees C and extruded into a thin film that cools as rollers flatten it. They are cut and sealed into a bag shape, painted with alcohol or water based ink and then handles, hanging holes and zippers are added.
There are four main types of polyethylene resin that are used to produce plastic bags-high density (HDPE), low density (LDPE), linear low density (LLDPE) and metallocene. HDPE isn't porous or stretchy, offers waterproof protection, and is considered the least expensive form of polyethylene. Although they may tear and cannot be recycled, HDPE is widely used in packaging and trash removal. LDPE is a porous and stretchy clear plastic material that is also used for packaging and trash applications. LLDPE is extremely stretchable, does not puncture or tear, and is less expensive than LDPE but used in the same applications. Metallocene is a new form of polyethylene, which is much more tough and tear resistant than LDPE.