Stretch Film

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In the early 1970's, advances in plastic resin technology lead to the manufacture of low density polyethylene film that when stretched did not break and had a squeezing force as it 'recovered' back to its original size. Today, stretch wrap remains one of the most effective ways to protect palletised goods. It aids load stability, protects products from moisture and is an excellent method of discouraging theft.

In comparison to shrink wrap, strapping or gluing, stretch wrapping is often the most efficient method of keeping multiple packages together. Where loads are subjected to severe vibration in transportation, the film has the 'elastic' property needed to withstand these forces and keep loads together and damage-free.

Rosewood’s stretch films are supplied in a range of widths and gauges in either cast or blown film for hand or machine applications. Rolls with both standard and extended cores are available. Our sales advisers can provide guidance in respect of selecting the right type and gauge of film to suit a specific application.

Cast Film
Cast film is manufactured from plastic resin pellets that are mixed and melted. The molten plastic is extruded through a long, precision-made die onto a rotating drum. The drum has a highly polished stainless steel surface and is filled with a liquid that maintains it at around 60ÞC. After the film solidifies on the surface of the drum, it is fed to cutters and wound onto reels.

Cast film has a clear, smooth appearance and it clings to itself without requiring additives. It has a built in yield point which gives a high level of memory. The material is able to hold pallets tightly together during transportation and over a long period of time. Cast film’s clarity permits easy bar code reading without needing to remove it and it is quiet when it is unwound from the reel.
Blown Film
Blown film has a milky appearance and is an economical alternative to cast film. It is manufactured from resin pellets that are melted and forced through a circular die. Unlike cast film, additives are required to enable the film to produce tack on both sides.

Cold air is blown into the middle of the molten film and a bubble is formed. It cools and collapses and is cut into two film webs that are trimmed to size and wound around cores to form rolls of stretch film. Blown film performs well in all temperatures and is ideal for use in cold storage.