Coefficient of Friction. In plastics films, indicates the ease with which a film surface is slid against like film or adjacent surface. A low value (near zero) indicates a slippery; a high value (7 or more) indicates a tacky film, which will stick to itself.
Coefficient of friction, a measurement of “slipperiness” of plastic films and laminates. Measurements are usually done film surface to film surface. Measurements can be done to other surfaces as well, but not recommended, because COF values can be distorted by variations in surface finishes and contamination on test surface. oy Pack (Doyen) - A stand-up pouch that has seals on both sides and around the bottom gusset. In 1962, Louis Doyen invented and patented the first soft sack with an inflated bottom called Doypack®. Although this new packaging was not the immediate success hoped for, it is booming today since the patent has entered the public domain. Also spelt - Doypak, Doypac, Doy pak, Doy pac. AA - Ethylene acrylic acid copolymer. Because of its excellent adhesion to aluminium foil, it is mostly used for extrusion lamination of foil to other surfaces.