7.1 Units
- N = Newton. A Newton is the force required to accelerate a resting body mass of 1 uniformly within one second on the speed of 1 m / s.
- µm = Mikrometer. Unit used for measurement of small thicknesses of tapes and backings. 1 µm = 1/1.000 mm = 0,001 mm
7.2 abbreviations of some plastics (acc. DIN 7728)
- PE: polyethylene
- PET: polyester (Polyethylentherephthalate)
- PP: polypropylene
- PUR: polyurethane
- PVC: polyvinylchloride
- H-PVC: hard-PVC
- W-PVC: soft-PVC
7.3 Symbols
m² | area |
[-] | functional determinant |
N | power |
kJ/kg | specific gibbs |
kg | mass |
mol | amount of substance |
Pa | pressure |
kJ/kg K | entropy |
°C | temperature |
sec | time |
m³ | volume |
mJ/m² | specifc adhesion |
° | angel |
mN/m | spreading pressure |
mN/m | surface energy (solid), surface tension (liquid), interfacial energy (solid/liquid) |
MPa | bond strength |
J/mol | chemical potential |
[-] | interaction parameter |