Film direction which is at a right angle to the direction of extrusion, also called cross direction (CD). Tubing

A compound or substance added to polymer to alter or improve its characteristics. Common additives include slip, antiblock, and color pigments. Antiblock

Additive which prevents degradation and oxidation of material when exposed to ambient air during processing and storage of finished product. Antistat

An undesirable adhesion between layers of film or sheeting which may develop during processing or storage. Bloom

Extrusion of a continuous thin walled tube of plastic through a round die and inflating it to form a bubble. The bubble is then collapsed flat between rollers and slit into layflat film which is wound [..]

Mineral based additive used as filler, modifier, and sometimes antiblock agent. Center Fold

A unitless measurement used to quantify how slippery or tacky a film is. It is the ratio of the force required to slide an object over a frictionless surface to the force required to slide the same ob [..]

Rigid cardboard tube onto which film is wound. Typical cores have either 3 inch or 6 inch inside diameters. Corona Treat

A circular steel block made up of an inner and outer ring through which plastic is extruded and inflated into a large tube. Die Gap

Lines in the machine direction of film caused by buildup of oxidized materials on the die. Differential Scanning Calorimetry (DSC)