Patent ID: 9637722
Date: 2017-05-02
CPC Classifications: A61P,B01D,B05D,C08J,C12N

Claim:
1. A production method of a polyurethane porous membrane to be used for at least one of applications of cell culture and cancer cell growth inhibition, the production method of the polyurethane porous membrane comprising: a first step of forming a layer of uncured polyurethane material on a substrate, the layer of uncured polyurethane material having a first surface adjacent the substrate and an exposed surface opposite the first surface; and a second step of supplying water vapor and contacting the exposed surface of the layer of uncured polyurethane material formed on the substrate with an effective amount of the water vapor effective to cure the uncured polyurethane material and to convert the uncured polyurethane material into a polyurethane porous membrane with a porous structure having a thickness of 0.1 to 100 μm and including a plurality of pores open to the exposed surface having an average pore diameter of 0.1 to 100 μm, the plurality of pores open to the exposed surface forming a plurality of irregularities on the exposed surface, wherein the porous structure of the polyurethane porous membrane only contains a single pore extending along a membrane thickness direction of the polyurethane porous membrane.