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MANUFACTURE of STRETCH WRAP FILM using PT**0 BLOWN FILM / CAST FILM We would like to suggest how you can best make stretch film for Pallet wrapping, using our PT**0 Masterbatch on Blown film lines. Blend 6 to 8 % by weight of PT**0 pellets with *4 to *2% of Polyethylene. Mix thoroughly in a ribbon or tumble blender so that the blend is uniform. The PE resin is typically a Butene (C4) LLDPE for Handwrap and a Hexene (C6) or Octene (C8)LLDPE for Machine-wrap, pre-stretch Machine-wrap and Silage-wrap. Often *0 % LDPE is added to the resin mix to improve clarity of Butene Linear resins. Pay attention to below remarks to let you achieve an excellent stretchwrap: None of the resins to be used must have any “slip” agent or “antiblocking” agent. This is very important, as the presence of any such additives will destroy the cling properties of the film. For initial trials, no recycled resin should be used.Use a lower desity resin and better. A suggestion for the temperature profile of the extruder is as follows: First Zone : **0°C Second Zone : **0°C Third & Fourth Zones : ******0°C Die Zones : ******0°C The higher temperature of die zones achieves, the better. The cooling temperature directly affects the cling property of film, the lower cooling temperature is, and then better cling film gets, cling also develops as the storge time goes. The bubble formed on a *5 μ film should have a Blow-Up Ratio of 3 to 1. The film should be trimmed just before the wind- up rolls. The tension on the rolls should be such that they are not wound too tightly or they will bunch-up at the ends and telescope when stored on end. Some cling will develop during wind-up but the maximum cling effect will take place during the *2 hours after production. Storage of rolls should neither exceed *5°C nor drop below 7°C if possible. If you follow these directions, it should help you to achieve an excellent Stretchwrap, with a higher degree of clarity and cling property.