Particulate Water-Absorbing Agent for Retention and Permeability
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Solution Overview
Problem
Existing water-absorbing resins fail to achieve a sufficient balance of fluid retention capacity, liquid permeability, and low dustiness, and there is a need for improved methods to measure their physical properties.
Innovation Solution
A particulate water-absorbing agent with enhanced properties is developed, and a novel evaluation method is introduced to measure these properties, including a measurement device and methods for CRC, DRC, GPR, and DAP.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional water-absorbing resin is used to achieve high fluid retention capacity, then absorption performance is improved, but liquid permeability decreases and dustiness increases
Solution Approach 1:
The invention changes the particle size parameters of the water-absorbing resin, specifically controlling D50 within 200-600 μm and D90 within 600-1200 μm. By optimizing these size parameters, the resin achieves high fluid retention capacity while reducing dustiness and improving liquid permeability, resolving the contradiction between absorption performance and harmful dust generation.
Solution Approach 2:
The invention creates a specific particle size distribution where different particle sizes serve different functions. Larger particles (controlled D90) provide structural integrity and reduce dust, while the overall distribution maintains adequate liquid permeability pathways, allowing simultaneous achievement of fluid retention and reduced dustiness.
2Productivity
If water-absorbing resin particle size is reduced to improve fluid permeability, then liquid permeability is improved, but fluid retention capacity decreases
Solution Approach 1:
The invention optimizes the particle size parameters within specific ranges (D50: 200-600 μm, D90: 600-1200 μm) to achieve the best balance. These parameter changes ensure sufficient liquid permeability through adequate particle spacing while maintaining fluid retention capacity through appropriate particle size and distribution.
3Measurement precision
If conventional measurement methods are used for physical properties, then measurement is possible, but measurement complexity and difficulty remain high
Solution Approach 1:
The invention provides a comprehensive measurement system that can evaluate multiple physical properties (fluid retention capacity, liquid permeability, dustiness, absorption speed) using integrated test methods. This multi-functional approach simplifies the overall measurement process while maintaining precision for each property, reducing the need for multiple separate complex devices.
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 method allows for easier measurement of physical properties and results in a particulate water-absorbing agent with improved fluid retention, permeability, and reduced dustiness, enhancing performance in absorbent bodies.
Implementation Method 1
the particulate water-absorbing agent having a non-uniformly pulverized shape
Implementation Method 2
a measurement device and methods for CRC, DRC, GPR, and DAP
Data Source
Figure 1
Figure 2
Figure 3~4
AI summary
Provided are a water-absorbing resin having more excellent balance of fluid retention capacity, liquid permeability, and low dustiness, an absorbent body comprising the water-absorbing resin, and an absorbent article comprising said absorbent body.