Abstract: The present invention provides: a porous membrane comprising polytetrafluoroethylene and/or modified polytetrafluoroethylene, which has a small pore diameter, is difficult to break, and is resistant to an external force such as penetration and the like; and a manufacturing method of same. Further provided is a porous membrane comprising polytetrafluoroethylene and/or modified polytetrafluoroethylene, where the bubble point due to isopropyl alcohol in accordance with JIS K3832 is 500 kPa or more, a numerical value obtained by dividing the maximum force until a needle penetrates by the thickness of a test piece is 200 mN/?m or more, based on a needle penetration strength test in accordance with JIS Z1707, the percentage of pore opening portions in a surface image by electron microscopy is 10 to 30%, and the fiber thickness is 250 nm or more.

Abstract: The problem of the present invention is to provide a novel polytetrafluoroethylene porous film having a small pore diameter, small film thickness, high porosity, and high strength, and a production method thereof. The present invention provides a polytetrafluoroethylene porous film, wherein a bubble point in isopropyl alcohol (IPA) according to JIS K3832 is not less than 400 kPa, and a tensile strength based on JIS K6251 is not less than 50 MPa.

Abstract: Provided is a porous membrane including polytetrafluoroethylene and/or modified polytetrafluoroethylene having a small pore diameter, thin film thickness, high porosity, and high strength; and a method for manufacturing the same. The porous membrane including polytetrafluoroethylene and/or modified polytetrafluoroethylenehas bubble point of isopropyl alcohol according to JIS K3832 of 600 kPa or more, and tensile strength according to JIS K6251 of 90 MPa or more.

Abstract: The problem of the present invention is to provide a novel polytetrafluoroethylene porous film having a small pore diameter, small film thickness, high porosity, and high strength, and a production method thereof. The present invention provides a polytetrafluoroethylene porous film, wherein a bubble point in isopropyl alcohol (IPA) according to JIS K3832 is not less than 400 kPa, and a tensile strength based on JIS K6251 is not less than 50 MPa.

Abstract: Provided is a material for a shape memory molded article and a shape memory molded article that exhibits superior shape memory capabilities, the material being a heat-fusible perfluoro resin having a glass transition temperature in the range of 10 to 60° C., and wherein the shape memory molded article exhibits shape memory capabilities in the temperature range of 30 to 100° C.