TY  - JOUR
AU  - Rodriguez, Nestor
AU  - Tiwari, Avinash
AU  - Persson, Bo
TI  - Air leakage in seals with application to syringes
JO  - Applied surface science advances
VL  - 8
SN  - 2666-5239
CY  - Amsterdam
PB  - Elsevier
M1  - FZJ-2022-03889
SP  - 100222 -
PY  - 2022
AB  - We study the leakage of air in syringes with Teflon coated rubber stopper and glass barrel. The leakrate depends on the interfacial surface roughness, the viscoelastic properties of the rubber and on the elastoplastic properties of the Teflon coating. The measured leakage rates are compared to the predictions of a simple theory for gas flow, which takes into account both the diffusive and ballistic air flow, and the elastoplastic multiscale contact mechanics which determines the probability distribution of interfacial separations. The theory shows that the interfacial air flow (leakage) channels are so narrow that the gas flow is mainly ballistic (the so called Knudsen limit). The implications for container closure integrity is discussed.
LB  - PUB:(DE-HGF)16
UR  - <Go to ISI:>//WOS:000768298900005
DO  - DOI:10.1016/j.apsadv.2022.100222
UR  - https://juser.fz-juelich.de/record/910506
ER  -