Peel Force
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Peel force
Definition of peel force
Peel force is defined as the average force required to separate a peel system. The peel force – fracture path diagram recorded during the peel test (T-peel test or fixed-arm peel test) (Fig. 1) recorded during the peel test, the characteristic plateau of the peel curve that forms between 20 % and 80 % of the fracture path lB is used to determine the measured variable peel force Fpeel, which is defined as the mean value of the forces occurring in this range.
| Fig. 1: | Peel force–fracture path diagram (peel curve) from the peel test, Fpeel – peel force; lB – fracture path; EG – total peel energy |
Peel force with variation in film composition
For example, the peel force of the low-density polyethylene peel system blended with isotactic polybutene-1 (abbreviation: PE-LD/iPB-1) is significantly influenced by the composition of the polymer blend. As a result of the T-peel test, Fig. 2 shows the peel force as a function of the iPB-1 content. The peel force decreases exponentially with increasing iPB-1 content. This dependence is used as the basis for the targeted adjustment of the PE-LD/iPB-1 peel system.
| Fig. 2: | Influence of the mass content of iPB-1 on peel force |
See also
- T-Peel test (90°/90°)
- Fixed-arm peel test (0°/Variable)
- Peel angle
- Peel-cling test (0°/20°)
- Peel properties of peel systems
References
- Nase, M., Langer, B., Grellmann, W.: Bruchmechanische Kennwertermittlung im T-Peeltest und im Fixed-Arm Peeltest. In: Frenz, H., Grellmann, W. (Eds.): 26. Tagung Werkstoffprüfung „Herausforderung neuer Werkstoffe an die Forschung und Werkstoffprüfung“, Berlin (2008) Proceedings pp. 223–228, (ISBN 978-3-00-026399-6; see AMK-Library under A 10) Download as pdf,
- Nase, M., Langer, B., Baumann, H. J., Grellmann, W.: Fracture Mechanics on Polyethylene/polybutene-1 Peel Films. Polymer Testing 27 (2008) 1017–1025; https://doi.org/10.1016/j.polymertesting.2008.09.002
- Nase, M.: Zusammenhang zwischen Herstellungsbedingungen, übermolekularer Struktur und Eigenschaften von Peelfolien. Shaker Publishing 2010 (ISBN 978-3-8322-9099-3; see AMK-Library under B 1-17)