METHOD FOR EVALUATING LIQUID LEAKAGE OF WATER ABSORPTIVE RESIN PARTICLE AND WATER ABSORPTIVE RESIN PARTICLE

• Main Authors: YABUGUCHI HIROKI, TSURU HARUKA
• Format: Patent
• Language: English; Japanese
• Published: 18.06.2020
• Subjects: AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F,C08G; BANDAGES, DRESSINGS OR ABSORBENT PADS; CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOIDCHEMISTRY; CHEMISTRY; COMPOSITIONS BASED THEREON; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF,TUBULAR STRUCTURES OF THE BODY, E.G. STENTS; FILTERS IMPLANTABLE INTO BLOOD VESSELS; FIRST-AID KITS; FOMENTATION; GENERAL PROCESSES OF COMPOUNDING; HUMAN NECESSITIES; HYGIENE; INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIRCHEMICAL OR PHYSICAL PROPERTIES; MEASURING; MEDICAL OR VETERINARY SCIENCE; METALLURGY; ORGANIC MACROMOLECULAR COMPOUNDS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; PERFORMING OPERATIONS; PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL; PHYSICS; PROSTHESES; TESTING; THEIR PREPARATION OR CHEMICAL WORKING-UP; THEIR RELEVANT APPARATUS; TRANSPORTING; TREATMENT OR PROTECTION OF EYES OR EARS; WORKING-UP

To provide a method for accurately evaluating a degree of occurrence of liquid leakage from an absorbent article when water absorptive resin particles are used in the absorbent article, and water absorptive resin particles which can efficiently contribute to suppressing occurrence of liquid leakage from the absorbent article.SOLUTION: There is provided a method for evaluating liquid leakage of water absorptive resin particles comprising the steps of: arranging a water absorptive layer 5 formed of water absorptive resin particles along an inclined plane Swhich is inclined to a horizontal plane S; injecting a droplet-state test fluid 50 including water to the water absorptive layer 5; measuring a diffusion distance D which is a distance at which the test fluid 51 injected to the water absorptive layer 5 is diffused along the inclined plane Sin a prescribed period, in that order. An angle θ formed by the horizontal plane Sand the inclined plane Sis 40 degree or smaller.SELECTED DRAWING: Figure 1 【課題】吸水性樹脂粒子が吸収性物品に用いられたときの吸収性物品からの液体漏れの発生の程度を、高い精度で評価する方法を提供すること、及び、吸収性物品からの液体漏れの発生を抑制することに効果的に寄与できる、吸水性樹脂粒子を提供すること。【解決手段】吸水性樹脂粒子からなる吸水層５を、水平面Ｓ０に対して傾斜した傾斜面Ｓ１に沿って配置することと、吸水層５に水を含有する液滴状の試験液５０を注入することと、吸水層５に注入された試験液５１が所定の時間内に傾斜面Ｓ１に沿って拡散した距離である拡散距離Ｄを測定することと、をこの順に含み、水平面Ｓ０と傾斜面Ｓ１とがなす傾斜角θが４０度以下である、吸水性樹脂粒子の液体漏れ性を評価する方法が開示される。【選択図】図１