Spherical Polymer Particles Rewet Performance
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Solution Overview
Problem
Fluid-absorbent articles face challenges in achieving improved rewet value and rewet under load due to limitations in the properties of existing fluid-absorbent polymer particles, particularly in terms of mean sphericity, moisture content, and distribution within the absorbent core.
Innovation Solution
The development of fluid-absorbent articles comprising a fibrous material and 10 to 95% by weight of spherical fluid-absorbent polymer particles with a mean sphericity of at least 0.84 and a moisture content of at least 8%, where the polymer particles are produced through dropletization polymerization, enhancing their centrifuge retention capacity and saline flow conductivity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional fluid-absorbent polymer particles are used, then the article structure is simple, but the rewet value and rewet under load are insufficient
Solution Approach 1:
The patent applies parameter changes by specifying precise requirements for fluid-absorbent polymer particles including mean sphericity of at least 0.84, moisture content of at least 8% by weight, and minimum particle mass of 9 g. These parameter optimizations improve rewet value and rewet under load without fundamentally changing the article structure.
Solution Approach 2:
The patent uses composite materials by combining fibrous material with spherical fluid-absorbent polymer particles in the absorbent core. This composite structure enhances absorption and distribution capabilities, improving rewet performance while maintaining structural simplicity.
2Reliability
If polymer particles with high sphericity and moisture content are used, then absorption and distribution capabilities improve, but manufacturing precision requirements increase
Solution Approach 1:
The patent optimizes particle parameters by specifying mean sphericity of at least 0.84 and moisture content of at least 8% by weight. These parameter ranges balance absorption capability with manufacturing feasibility, ensuring high-performance particles can be produced with controlled precision.
3Reliability
If spherical polymer particles are used, then saline flow conductivity improves, but particle production complexity increases
Solution Approach 1:
The patent employs spheroidality by using spherical fluid-absorbent polymer particles with mean sphericity of at least 0.84. The spherical shape enhances saline flow conductivity through the absorbent core. The particles are produced via dropletization polymerization, a process that naturally forms spheres, thereby achieving improved flow properties without excessively complex production equipment.
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 enhanced properties of the fluid-absorbent articles result in improved rewet value and rewet under load, with the spherical polymer particles providing increased absorption and distribution capabilities, effectively addressing the limitations of previous technologies.
Implementation Method 1
fluid-absorbent polymer particles having a mean sphericity of at least 0.84 and a moisture content of at least 8% by weight
Implementation Method 2
fluid-absorbent core (C) contains at least 9 g of the fluid-absorbent polymer particles
Data Source
AI summary
The present invention relates to fluid-absorbent articles, comprising an upper liquid-pervious layer, a lower liquid-impervious layer and a fluid-absorbent core, wherein the fluid-absorbent core comprises a fibrous material and 10 to 95% by weight of spherical fluid-absorbent polymer particles having a moisture content of at least 8% by weight.