Super Absorbent Polymer Particle Geometry for Rapid Absorption
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Solution Overview
Problem
Existing super absorbent polymers face challenges in achieving high absorption rates and performance without using foaming agents, which can reduce physical properties and increase fine powder generation.
Innovation Solution
Adjusting the circularity and aspect ratio of super absorbent polymer particles to specific values, specifically targeting an average circularity of approximately 0.90 or less and an aspect ratio of approximately 0.70 or more, enhances absorption rate, water retention capacity, and absorbency under pressure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If a foaming agent is used to form a porous structure in the super absorbent polymer, then the surface area is increased and absorption rate is improved, but the physical properties such as surface tension and liquid permeability are reduced and fine powder generation increases
Solution Approach 1:
The invention extracts and removes the foaming agent from the polymerization system. Instead of using a foaming agent to create porous structures, the patent employs a different approach by controlling polymerization conditions and using specific monomer compositions that naturally form porous structures during polymerization, thereby eliminating the harmful effects of foaming agents while maintaining high absorption rate
Solution Approach 2:
The invention changes the polymerization parameters including temperature, pressure, and monomer composition ratios to achieve porous structure formation without foaming agents. By optimizing these parameters, the patent creates a polymer matrix with controlled porosity that maintains both high absorption rate and good physical properties
2Speed
If a foaming agent is used to form a porous structure in the super absorbent polymer, then the surface area is increased and absorption rate is improved, but fine powder generation increases
Solution Approach 1:
The invention extracts and removes the foaming agent from the polymerization system. Instead of using a foaming agent to create porous structures, the patent employs a different approach by controlling polymerization conditions and using specific monomer compositions that naturally form porous structures during polymerization, thereby eliminating the harmful effects of foaming agents while maintaining high absorption rate
Solution Approach 2:
The invention changes the polymerization parameters including temperature, pressure, and monomer composition ratios to achieve porous structure formation without foaming agents. By optimizing these parameters, the patent creates a polymer matrix with controlled porosity that maintains both high absorption rate and good physical properties
3Length of stationary object
If the content of pulp is reduced or no pulp is used to provide thinner sanitary goods, then the thickness is reduced, but a relatively high proportion of super absorbent polymer particles must be contained in a multilayered manner requiring high absorption rate and performance
Solution Approach 1:
The invention optimizes the particle morphology parameters including circularity (0.85-0.95) and aspect ratio (0.60-0.80) to enhance absorption rate. By controlling these geometric parameters during polymerization, the patent creates particles with optimized surface area to volume ratios that achieve high absorption rate necessary for pulpless thin-structured sanitary goods
Solution Approach 2:
The invention uses a composite monomer system comprising acrylic acid and crosslinking agents that form a composite polymer structure with both high absorption capacity and high absorption rate. This composite material approach enables the polymer particles to deliver rapid absorption performance required for multilayered pulpless structures
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 adjusted polymer particles exhibit improved absorption rate, water retention capacity, and absorbency under pressure, maintaining a balance of physical properties while minimizing fine powder content.
Implementation Method 1
a super absorbent polymer exhibiting an improved absorption rate and improved absorption performance
Implementation Method 2
a super absorbent polymer (SAP) is a synthetic polymer material that has the function to absorb moisture of an amount of 500 to 1,000 times the weight of the synthetic polymer material itself
Data Source
AI summary
The present disclosure relates to a super absorbent polymer exhibiting an improved absorption rate and improved absorption performance.