Blown

Stretch film manufacturing method involving blowing of air through molten resin to make a large "bubble which is then fattened. Typically blown film is a tougher but noisier film than cast films.

Soufflée

Méthode pour manufacturer la pellicule étirable qui implique le soufflage d'air dans la résine fondue pour en faire une grosse bulle qui est ensuite aplatie.

Cast

Stretch film manufacturing method involving extrusion of resin which is then cooled on a large drum. Cast film typically is quieter, more transparent, and glossier than blown film because of this process.

Coulée

Méthode pour manufacturer la pellicule étirable impliquant l'extrusion de résine qui est ensuite refroidie sur un grand rouleau.

Cling

Cling is a bonding agent added to stretch film to increase the stickiness quality of the film. This is desirable to allow the layers of stretch film applied to bond to the previous layers effectively creating a single wall of stretch film. Depending on the desired effect the bonding agent is applied to one or both sides. It is most commonly applied using co-extrusion where the bonding agent is a layer that is co-extruded during the manufacturing process.

Film Memory

Film memory is the key reason for prestretching stretch film. Prestretching stretch film creates a memory in the film, which causes a continuous elastic effect as the film tries to return to its unstretched self. This ensures that the load integrity is maintained even as the load shifts or settles during transit. It is this film memory that differentiates prestretched film from non-prestretched film or other means of unitizing. For instance, settling that occurs during shipment can loosen other methods of unitizing (strapping) where prestretched film memory takes up the slack and continues to secure the load.

Mémoire de la pellicule

Gauge

Thickness of stretch film in imperial measurements (usually in hundred thousand of inches).

Calibre

Épaisseur de la pellicule exprimée en mesures impériales (communément en cent millièmes de pouce).

Hand Wrap

Stretch film designed to be post stretched or tensioned stretched by personnel without equipment is called hand wrap. Typically hand wrap does not have the stretching abilities of machine wrap and is wound on smaller and lighter rolls for easier manipulation.

Pellicule manuelle

Micron

Metric stretch film thickness measure. Obsolete term synonymous with micrometer. A thousanth of a millimeter or one millionth of a meter. Symbol: µm.

Micron

Mesure métrique d'épaisseur de pellicule étirable. Mot désuet synonyme de micromètre. Un millième de millimètre ou un millionième de mètre. Symbole: µm.

Overwrap

Is the amount of stretch film applied over the top of the load. As the stretch film reaches the top of the load, the vertical movement of the carriage can continue so that the film angles over the top of the load. The stretch film on top creates a downward force on the pallet load. This is also used when a plastic top sheet or corrugated top cap is applied on the top of the load to lock them in place.

Suremballage

Prestretch

Prestretch is the process of stretching the film in a prestretch carriage prior to applying it to the load to be wrapped. As the stretch film passes through the carriage it threads past two rubber rollers (primary roller and secondary roller). The secondary roller is usually larger than the primary roller and its rotational speed is geared to be faster than the primary roller. This differential speed causes the film to stretch.

Préétirage