Water-Absorbing Resin Particle Composition for Gel-Blocking Control
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Solution Overview
Problem
Existing absorbers face issues with liquid leakage due to gel-blocking phenomena caused by high water absorption rate resin particles, leading to poor liquid diffusibility, and low absorption rates with low water absorption rate resin particles result in re-wet issues.
Innovation Solution
An absorber containing water-absorbing resin particles with a specific water absorption rate of 55 to 150 seconds and a non-pressure DW 5-minute value of 36 mL/g or less, comprising 9 to 90 mass%, along with a coating layer to enhance diffusibility and absorption efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If water-absorbing resin particles with high water absorption rate are used, then water retention capacity is improved, but liquid diffusibility deteriorates due to gel-blocking phenomenon
Solution Approach 1:
The patent applies parameter changes by precisely controlling the water absorption rate (55-150 seconds by Vortex method) and non-pressure DW 5-minute value (36 mL/g or less) of water-absorbing resin particles. This optimization balances the gel-blocking effect (improving retention) while maintaining sufficient liquid diffusibility, resolving the contradiction between water retention capacity and liquid diffusibility through quantitative parameter control
2Productivity
If water-absorbing resin particles with low water absorption rate are used, then liquid diffusibility is improved, but absorption rate deteriorates and re-wet occurs
Solution Approach 1:
The patent resolves this contradiction by establishing specific parameter ranges: water absorption rate of 55-150 seconds and non-pressure DW 5-minute value of 36 mL/g or less. These controlled parameters ensure that the resin particles maintain adequate liquid diffusibility while achieving sufficient absorption rate and preventing re-wet, avoiding the deficiencies of both excessively high and low water absorption rate materials
3Quantity of substance
If water-absorbing resin particles with high water absorption rate are used, then water retention capacity is improved, but absorption rate deteriorates due to gel-blocking
Solution Approach 1:
The patent addresses this contradiction through precise parameter control of the water-absorbing resin particles, specifically setting the water absorption rate between 55-150 seconds and non-pressure DW 5-minute value at 36 mL/g or less. This optimization allows the material to achieve adequate water retention capacity while maintaining sufficient absorption rate by controlling the degree of gel-blocking
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The absorber achieves excellent liquid diffusibility, reduced re-wet amount, and high absorption rate by minimizing gel-blocking and optimizing resin particle performance.
Implementation Method 1
water-absorbing resin particles having a particle size suitable for use in absorbing articles
Implementation Method 2
water-absorbing resin particles having a high water absorption rate
Implementation Method 3
when water-absorbing resin particles swell with a liquid, gaps inherently present between water-absorbing resin particles are filled with swollen gel-like water-absorbing resin particles
Data Source
AI summary
One aspect of the present invention relates to an absorber containing water-absorbing resin particles, in which the water-absorbing resin particles include water-absorbing resin particles (A) which have a water absorption rate of 55 to 150 seconds according to a Vortex method and have a non-pressure DW 5-minute value of 36 mL/g or less, and the content of the water-absorbing resin particles (A) based on a total amount of the water-absorbing resin particles is 9 to 90 mass %.