HDPE film is a special type of HDPE that possesses properties that make it particularly suitable for film applications such as grocery bags, carrier sacks, food wrapping, and other applications. Like other forms of HDPE, it is produced by the polymerization of ethylene in a catalytic process, and is pumped out of the production chamber, through a die where it is extruded, and then cut into small pellets which are subsequently shipped off to various manufacturers wishing to make HDPE Film products. The type of HDPE used to make HDPE film is known as Film Grade HDPE, and is a high gloss, medium density HDPE product with very good impact strength.
HDPE film is generally made by blow extrusion, a process in which HDPE is extruded through a die and blown up with compressed air into a thin film bubble. The thickness resulting film is generally around 15 microns for most applications, and even in this very thin state, the HDPE film retains some remarkable properties.
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