| abstract |
A method of drying a viscous solution containing a (meth)acrylic acid-based polymer or copolymer containing (meth)acrylic acid and/or a salt thereof as a monomer unit, the degree of neutralization of the acid group contained in the polymer being not more than 50 mol %, wherein the method comprises subjecting the solution to, or passing the solution through, a drying zone, in the form of a line, so that the solvent in the solution is removed. |