The stretching of polymer films improves their characteristics in many ways. COLLIN offers laboratory and pilot lines for stretching films for a wide range of thermoplastic materials and compounds. These lines are used for quality control and the development of new products and processes. They can also be used for the production of narrow films.
Design of a COLLIN stretching line:
Due to the option of one or two stretching gaps, the machines show high variability:
MDO single stretching unit
A variety of polymers, especially PP, PE but also PA are monoaxially stretched in order to improve the mechanical, optical and barrier characteristics considerably. Essentially, the stretching is done with the short gap process in a stretching gap with adjustable length of the stretching gap.
MDO dual stretching unit
This system of a two-gap stretching line was developed in industry for the production of breathable films. The special feature of these films is a high proportion of mineral fillers. This task requires a special design of the machine and modified process parameters.
Thermoplastic materials and compounds such as PP, PE, PET, PA
|Parameters/MDO Stretching unit||MDO 400 single||MDO 400 dual||MDO 600 single||MDO 600 dual|
|Roll width||400 mm||400 mm||600 mm||600 mm|
|Number stretching gaps||1||2||1||2|
|Max. inlet width film||350 mm||350 mm||550 mm||550 mm|
Edge strip cutting and winding
Film thickness measurement
Corona pre-treatment station
Covering on all sides with doors on all sides – laminated safety glass
New feeding procedure
Emergency braking of all rolls when opening the doors
During feeding procedure, speed reduction into creep speed