Poly(meth)acrylic acid (salt)-based particulate absorbent
AssigneeNippon Shokubai Co., Ltd.
InventorsYoshitaka Ikeuchi, Yoshifumi Adachi
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Abstract
A low cost, a disposable diaper is provided that presents no difficulties in disposable diaper manufacture in humid climates, and that has a minimal amount of flowback, and rapid absorption time. A particulate water-absorbing agent is provided having as the principal component a poly (meth)acrylic acid (salt)-based water absorbing resin, wherein the water-absorbing agent has a particle size distribution of a weight average particle diameter of 300 to 500 μm, a blocking ratio after moisture absorption when left for one hour at 25° C. and 90% relative humidity of 20% or less, a surface tension of 60 mN/m or more, and a gel capillary absorption (GCA) of 28.0 g/g or more.
Claims15
A particulate water-absorbing agent comprising a poly (meth)acrylic acid (salt)-based water-absorbing resin as a main component, wherein
- the particulate water-absorbing agent has:
- a weight average particle diameter (D50) of 300 to 500 μm,
- a blocking ratio after moisture absorption when left for one hour at 25° C. and 90% relative humidity of 20% or less,
- a surface tension of 60 mN/m or more, and
- a gel capillary absorption (GCA) of 28.0 g/g or more.
Dependencies are inferred from the claim text.