PARTICULATE WATER ABSORBING AGENT, WATER-ABSORBENT CORE AND ABSORBING ARTICLE

摘要

The present invention provides a particulate water absorbing agent for absorbent cores which is excellent in powder conveying property, and achieves sufficient absorption performances for use in absorbent cores in particulate water absorbing agents including a water absorbing resin as a principal component, and which further is suitable for practical applications. In the present invention, characteristics that had not been known conventionally at all, i.e.,“permeability potential under pressure (PPUP)”and“frictional charge being a positive charge”of the particulate water absorbing agent are regulated at a time, and furthermore, regulation of the“moisture content of 2 to 10% by weight”is perfected. Also, the particulate water absorbing agent including (A) a water-swelling crosslinked polymer having a constitutional unit derived from an unsaturated monomer containing an acid group and/or a salt thereof; and (B) water fulfills certain requirements.