Gel pulverizer, polyacrylic acid (salt) water-absorbing resin powder production method, and water-absorbing resin powder

摘要

Disclosed is a water-absorbent resin useful for sanitary products such as paper diapers, sanitary napkins and medical blood-replacement agents with improved liquid permeability and water absorption speed. The present invention also provides a water-absorbent resin powder useful for sanitary goods such as paper diapers, sanitary napkins and medical blood-replacement agents with improved liquid uptake and heat retention. The gel crusher (100) used for producing the water-absorbent resin includes a screw (11), a supply port (14), an extrusion port (16), a perforated plate (12), and a reverse prevention member (19 ) Is formed. The anti-reverse member (19) satisfies at least one of the specific parameters.