PROCESSING METHOD OF BASE MATERIAL SHEET, MANUFACTURING METHOD OF MODIFIED BASE MATERIAL SHEET, BASE MATERIAL WITH GRAFTED POLYMER CHAIN, AND ION EXCHANGE MEMBRANE

摘要

A treatment method for a base material sheet. According to the treatment method, a base material sheet that has been wound onto a first core and a porous body sheet that has been wound onto a second core are wound out and overlappingly wound onto a third core, a treatment liquid for the base material sheet that is held by the porous body sheet is supplied to the base material sheet, the base material sheet and the porous body sheet that have been overlappingly wound onto the third core are wound out, the porous body sheet is wound onto the second core, and the base material sheet is wound onto the first core.