| abstract |
The microporous membrane winding body 33 of the present invention comprises cores 1, 11, 21, and 31 partially or wholly made of the conductive members 12 and 13 and cores 1, 11, 21, And a microporous membrane (34, S). Charges 102 and 201 having opposite polarities are equally charged on the first surface 100 and the second surface 200 of the microporous membrane 34 (S). The manufacturing method of the microporous membrane winding body 33 is the same as the method of manufacturing the microporous membrane winding body 33 except that the microporous membranes 34 and S are discharged by the electricity generator 35 and the cores 1, 11, 21, 31 to wind the microporous membrane (34, S). It is possible to prevent the microporous membranes 34 and S from being pulled close to the microporous membrane winding body 33 or the peripheral devices by static electricity when the microporous membranes 34 and S are wound from the cores 1, 11, 21, do. The microporous membrane (34, S) is useful as a separator of a fuel cell or a secondary battery. |