abstract |
The present invention relates to a hollow porous film having a porous film layer and a support, wherein the porous film layer is made of a thermoplastic resin, and the support has a stretch elongation percentage of 1.0% or less and a hollow porous film . According to the present invention, it is possible to provide a hollow porous film capable of maintaining sufficient physical strength and good water permeability even when the outer diameter is small. |