Millipore ® Filter Membranes Millipore ® membranes have supported laboratory filtration in academic, pharmaceutical, and industrial sectors since the 1950s. We provide a range of membrane chemistries including MF-Millipore ® mixed cellulose esters, Durapore ® PVDF, Millipore Express ® PLUS polyethersulfone, as well as hydrophilic and hydrophobic PTFE.