| 摘要 |
PROBLEM TO BE SOLVED: To provides a means capable of sufficiently exerting the modification effect by the addition of additive particles other than water-absorbing resin to water-absorbing resin particles and to provide a water-absorbing resin composition capable of stably exhibiting high physical properties. SOLUTION: The problems can be solved by using additive particles containing over cohesive particles in an amount equal to or less than a predetermined amount, or by using the additive particles having been crushed or classified in advance, before mixing with water-absorbing resin particles. Alternatively, the problem can be solved by subjecting a mixture of the water-absorbing resin particles with the additive particles to pneumatic transportation processing, in particular, in a heated state, after mixing or at the same time as mixing. Further, the problems can be solved by a water-absorbing resin composition, where the addition amount of additive particles and amount of free additive particles satisfies a predetermined relation. COPYRIGHT: (C)2008,JPO&INPIT
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