Sequential Stretching solutions
Machine Direction Orientation (MDO) and Transverse Direction Orientation (TDO)
According to your process specifications and the properties you need to obtain, your film requires to be stretched either in Machine Direction, Transverse Direction, or both (sequential or monoaxial stretching).
MDO (Machine Direction Orientation)
- pre-heating roll group
- stretching roll group (either short gap or long gap with infra-red heating)
- heat setting roll group
- cooling roll group when required
- VCS heating system (caloduc) for individual Temperature regulation with the most efficiency
- oil heating units for each roll or pair of rolls
- tension control at entry and exit
Modular sections allow adaptation to all production speeds and thickness ranges as well as all space requirements. Indeed, the speed of the rolls is individually adjustable and direct measurement of draw roll stretching enables continuous control of production’s quality.
TDO (Transverse Direction Orientation)
This part of the machine includes a heating system (oven) and a mechanical system for transport and simultaneous transverse stretching of the film In the oven the film can be heated by convection (electricity, oil, steam, gas).
T.D.O. includes a technical know-how designed and patented by MARCHANTE SAS:
CLIPS FOR SIMULTANEOUS RELAX SYSTEM
The high speed tenter includes clips mounted on bearings or on sliding surfaces, while the clip-system includes the latest technological developments, such as:
- high precision casting of body and jaw
- wide gripping range
- automatic return in open position
- film ejection system in clip body
- continuous chain track with wide adjustment angle (monorail)
- low lubrication requirements for both styles of clips