Method for continuous production of water absorbent resin

摘要

The present invention relates to a method for continuous production of a water-absorbent resin by use of an continuous polymerization device having a charge part of a monomer aqueous solution; an endless belt on which the monomer and a hydropolymer formed are conveyed; and a discharge part of the hydropolymer, wherein the continuous polymerization device has side walls and a ceiling, and the space ratio in the device represented by the equation, "space ratio in the device=B/A", is in the range of 1.2 to 20. In the equation, A is a maximum cross-sectional area (cm<2>) of the hydropolymer during the polymerization in the width direction of the endless belt, and B is a maximum cross-sectional area (cm<2>) of the space between the endless belt of the continuous polymerization device and the ceiling of the continuous polymerization device in the width direction of the endless belt.