Superabsorbent resin particles, absorbents, and absorbent articles
Patent Information
- Authority / Receiving Office
- JP · JP
- Patent Type
- Patents
- Current Assignee / Owner
- SUMITOMO SEIKA CHEM CO LTD
- Filing Date
- 2022-04-14
- Publication Date
- 2026-06-09
AI Technical Summary
【0011】 本発明によれば、従来の吸水性樹脂粒子と併用することで、平面部分及び湾曲部分のいずれであっても十分に速い浸透速度で水分を吸収することを可能にする吸収性物品が得られる、新規な吸水性樹脂粒子を提供することが可能となる。
Smart Images
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Abstract
Claims
1. A coated resin particle having polymer particles containing at least one selected from the group consisting of (meth)acrylic acid and salts thereof as monomer units, and a coating layer covering at least a part of the surface of the polymer particles, The proportion of (meth)acrylic acid and its salts is 70 to 100 mol% relative to the total amount of monomers. When the lock-up height at the n-minute value is Hn [cm], H1 is 0.1 cm or more and 0.8 cm or less, and H10 / H1 is 6.0 or more and 20.0 or less. The lock-up height at the aforementioned n-minute value is measured by the following procedure for superabsorbent resin particles. (1) A particle layer is formed by arranging 0.200 g of water-absorbing resin particles across the entire bottom surface of a cylinder with an inner diameter of 2.0 cm and a depth of 8.0 cm, and the height of the particle layer is set to H0 [cm]. (2) Add 20 g of physiological saline to the particle layer to swell the particle layer. (3) The height of the particle layer after n minutes have elapsed since the entire amount of physiological saline was added is recorded as Hn', and the lock-up height Hn [cm] at n minutes is calculated from the formula: Hn' - H0.
2. The water-absorbing resin particles according to claim 1, wherein the 2-minute value of the unpressurized DW is 15.0 or less.
3. The water-absorbing resin particle according to claim 1, wherein the components constituting the coating layer are at least one selected from the group consisting of a polymer containing substituted or unsubstituted alkenes as monomer units and fatty acids.
4. The water-absorbing resin particles according to claim 3, wherein the coating layer is a poorly water-soluble coating layer.
5. A water-absorbing resin composition comprising water-absorbing resin particles according to any one of claims 1 to 4, and other water-absorbing resin particles other than the water-absorbing resin particles.
6. An absorbent containing water-absorbent resin particles according to any one of claims 1 to 4, or the water-absorbent resin composition according to claim 5.
7. An absorbent article comprising the absorbent material described in claim 6.
8. The absorbent article according to claim 7, which is a diaper.