| 摘要 |
PROBLEM TO BE SOLVED: To provide a porous laminate in which a high permeation flow rate can be obtained while maintaining its mechanical strength.SOLUTION: Provided is a porous laminate provided with: a porous supporting layer 1; a porous collection layer 2 essentially consisting of polytetrafluoroethylene and laminated on either side of the supporting layer 1; an adhesive layer 3 essentially consisting of a fluorine resin; and a porous protective layer 4 in this order, in which the average flow rate pore size of the collection layer 2 is smaller than the average flow rate pore size of the supporting layer 1 and the protective layer 4, and a difference between the Gurley second of the laminate including the supporting layer 1 and the collection layer 2 from which the protective layer 4 is peeled from the face side on the side opposite of the supporting layer 1 of the collection layer 2 and the Gurley second of the laminate composed of the supporting layer 1 and the collection layer 2 is 10 sec or lower.SELECTED DRAWING: Figure 1 |
