| abstract |
The present invention provides a kind of polytetrafluoroethylene (PTFE) rolled films, have the pore structure of three-dimensional perforation, there is transforaminal on the stem of hole, and hole aperture is 200 ± 100nm, and stem diameter is 125 ± 75nm, 45 ± 25nm of transforaminal aperture；The porosity of hole is 80 ± 10%, and the porosity of transforaminal is 30 ± 15%；The total surface area of the stem, stem area: transforaminal area=15-30:1.The polytetrafluoroethylene (PTFE) rolled film that the present invention provides a kind of service phases is long, separating effect is excellent. |