Surface
Coefficient of friction (COF)
ZwickRoell · COF module
A COF that is too high jams the film in the machine, one that is too low lets it slip out of the forming set. We measure both sides, because they do not behave the same.
ASTM D1894
Foto 06 - ZwickRoell COF - BarrierLab
- Date
- 4 November 2026, 10:10
- Location
- BarrierLab laboratory, TRC Park, Jucu de Sus
- GPS coordinates
- 46.877579, 23.785723
- Instrument
- ZwickRoell, coefficient of friction fixture
- Camera
- Canon EOS R6
- Editing
- Cropped to 4:3 and downsized, no other retouching
- AI editing
- No
- Original file
- 472B5379.CR3
Foto 06 - ZwickRoell COF - BarrierLab
What we measure
- —Static and dynamic COF
- —Film to film and film to metal
- —Difference between inner and outer side
Where it is used
Settings on flowpack and vertical machines, slip problems in stacking, films with slip agent.
Test data
| Sample needed | Flat film 200 × 250 mm, 5 specimens |
| Conditioning | Min. 24 h in the laboratory, at controlled temperature |
| Turnaround | 2 working days |
| Deliverable | Test report (RO / EN) |
Indicative values — confirmed with the quotation.
Request this test