Please see the 4 steps of TD Stretching of Biax Film using the Rope Stretch Technology
1. Film Inlet
The ropes are turned with a double turning wheel guiding the upper and the lower rope and the film guided through the slot between the wheels.
2. Gripping the Film
Right after the inlet, the ropes are guided to grip the film and to make a good connection with it.
3. Guiding the film through the preheating zones
The film is then run and guided through the preheating and stretching zones. Any guiding and stretching pattern can be applied.
4. Film release and rope drive
The film at the end of the TDO is released by letting the ropes get apart. The outlet turn is also used for driving the rope and to adjust the rope tension.