The stretch film is a film of plastic material (polyethylene , linear low density) , mainly used as part of the packaging of palletized units .
The stretch film is a self-adhesive stretch film used in packaging .
Taking advantage of its elastic properties , the film is stretched in cold and wrapped around the product to be packaged. As soon ceases the strength of board, the elastic return of the film determines a clamping force on the packing.
Categories and subcategories winders ( or wrapping or wrapping ) :
Automatic winding machine with rotating arm
automatic Packing
Winders manuals :
With central core extended : an extension of the core of the reel of extensible film serves as a handle for winding ; this type of winder manual does not offer , however, a good seal of the packaging and is often very tiring for the user.
With mechanical brake : a simple structure supports the film reel and a mechanical brake system provides resistance to the film , creating the stretch.
Winder rod is similar to the system with mechanical brake , but the stretch film reel and the brake are placed at the end of an auction ergonomic design that eliminates the obligation to bow to wrap the base load and to strive for reach its summit .
Winders semi-automatic:
Rotating platform: the load to be wrapped is placed on a turntable which enables the load to rotate while the stretch film reel, which is positioned in a trolley able to move vertically along a "riser" fixed, envelops it. The winding is obtained by the combined action of these two elements by rotating the load at a speed greater than the film.
Rewinder orbital: the reel of film is positioned in a carriage on a vertical ring, the load passes over a horizontal roller conveyor through the ring which in the meantime apply the film to the load. A variant of the winder orbital is the system by a horizontal ring, in which the load remains stationary while a horizontal ring around the wheel moving vertically while enveloping it with the film.
Automatic winders:
The automatic winders, unlike those semi-automatic include a conveyor system to automatically load the machine and automated systems for applying, seal and cut the film. They are used for high production.
Rotating platform: the load to be wrapped is placed on a turntable which enables the load to rotate while the stretch film reel, which positioned in a trolley able to move vertically along a "riser" fixed, envelops it. The winding is obtained by the combined action of these two elements by rotating the load at a speed greater than the film.
Rewinder rotating arm: in this system the reel of film is positioned on a trolley that slides vertically along the rotating arm. The load REMAINING still while the machine arm rotates around the load wrapping. These winders are able to reach very high production capacity.
Wrapper rotating ring: The stretch film reel is positioned on a carriage which slides along a horizontal ring. in this system the load remains stationary while the ring rotates around the horizontal moving vertically. These winders are able to reach very high production.