Patent ID: 11931718
Assignee: SUMITOMO SEIKA CHEMICALS CO., LTD.
Field: Measurement (Instruments)
Classification: CPC B  C  A  G | IPC A  B  C  G

Claim 0:
1. Water-absorbing resin particles having a repulsion rate of 5% or more represented by Formula (1):

(h3−h2)/h1×100(%)  (1)

wherein in Formula (1), when a cylinder with an inner diameter of 25.4 mm, which has a mesh-like bottom onto which 0.2 g of the water-absorbing resin particles are sprinkled, is placed in a container having ion exchange water in an amount of 30 times a mass of the water-absorbing resin particles such that the water-absorbing resin particles absorb the ion exchange water, h1 represents a free swelling height (mm) of the water-absorbing resin particles after 1 minute from initiation of the water absorption, h2 represents a height (mm) of the water-absorbing resin particles after a load of 1.3×103 Pa is applied to the water-absorbing resin particles for 1 minute after 1 minute from initiation of the water absorption, and h3 represents a height (mm) of the water-absorbing resin particles after 1 minute from release of the load applied when measuring h2.