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:
- Extrusion group
- Stretching unit
- Take-off
- Winder
Advantages
- Improvement of film characteristics
- Extension of application possibilities of the film
- High variability of the stretching unit
- Optimisation of mechanical characteristics such as tensile strength, elongation as well as barrier effect against different media
- Compact design
- Film can manually be fed
- Comfortable cleaning
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.
Applications
- Short gap stretching for films e. g. made of PP and PE
- Long gap stretching with IR additional heating for films e. g. made of PET
Materials
Thermoplastic materials and compounds such as PP, PE, PET, PA
Use
- Laboratory operation
- R&D
- Product development
- Quality control
- Pilot production
- Production of narrow films
Customers
- All manufacturers of polyolefins (PP, PE) and PA
- Processing companies in the field of stretching films
- Manufacturer of mineral fillers, compounds and films for breathable applications
