Absorbent Composite Stepped Capacity Triggering Mechanisms
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Solution Overview
Problem
Conventional absorbent composites in absorbent articles face challenges with high wet bulk in the fluid insult target zone, leading to leakage and poor fluid distribution, despite increased superabsorbent material concentrations, which result in discomfort and reduced performance.
Innovation Solution
A superabsorbent polymer composition with an initial absorbent capacity of at least 5 grams of saline per gram, featuring a first triggering mechanism with a release time between 5 and 60 minutes and a second triggering mechanism with a different release time, providing a second absorbent capacity at least 25% greater than the first, as measured by the Modified Centrifuge Retention Capacity Test, to enhance fluid distribution and intake rate.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If higher concentrations of superabsorbent material are used to increase total absorbent capacity, then fluid absorption capacity is improved, but wet bulk in the target zone increases leading to leakage and discomfort
Solution Approach 1:
The patent segments the absorption process into multiple stages using triggering mechanisms with different release times. The superabsorbent material is divided into functional groups that activate at different times, allowing controlled expansion and absorption in different zones, thereby increasing capacity without proportionally increasing wet bulk in any single target zone.
Solution Approach 2:
The patent introduces dynamic behavior through triggering mechanisms that change the absorbent properties over time. The superabsorbent material transitions from a low-absorbency state to a high-absorbency state based on temporal triggers, enabling the system to adapt its capacity distribution dynamically rather than being static, thus improving overall capacity while managing wet bulk distribution.
2Quantity of substance
If conventional SAPs are used to increase absorbent capacity, then fluid intake is improved, but fluid distribution becomes insufficient leading to high wet bulk in target zones
Solution Approach 1:
The patent segments the superabsorbent material into multiple functional groups with different triggering characteristics. This segmentation allows different portions of the material to activate at different times and locations, improving fluid distribution across the absorbent article rather than concentrating absorption in单一 target zones, thus resolving the distribution instability.
Solution Approach 2:
The patent changes the temporal parameters of the superabsorbent material by introducing triggering mechanisms with different release times. This transforms the static absorbent material into a dynamic system where absorption parameters (capacity, rate, location) change over time, achieving stable and balanced fluid distribution throughout the article.
3Productivity
If superabsorbent material concentration is increased to improve absorption, then fluid intake rate is improved, but wet bulk increases causing pressure and potential cracking
Solution Approach 1:
The patent introduces dynamic temporal control through triggering mechanisms that regulate when and how the superabsorbent material activates. This dynamic approach allows the system to manage swelling pressure by controlling the timing and sequence of activation, preventing simultaneous expansion that would cause excessive pressure and cracking, while still achieving high fluid intake rates.
Solution Approach 2:
The patent applies preliminary action by using triggering mechanisms that prepare and activate different portions of the superabsorbent material in a predetermined sequence. This preliminary temporal arrangement allows the system to distribute swelling pressure over time and space, preventing concentration of stress that would lead to cracking, while maintaining high overall absorption capacity.
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 solution effectively reduces wet bulk in the target zone, improves fluid distribution, and maintains fluid intake rate performance, providing enhanced comfort and reduced leakage in absorbent articles.
Implementation Method 1
Superabsorbent polymers (SAPs) are frequently used in absorbent articles to help improve the absorbent properties of such articles. SAPs are generally polymer based and are available in many forms, such as powders, granules, microparticles, films and fibers, for example. Upon contact with fluids, such SAPs swell by absorbing the fluids into their structures.
Implementation Method 2
a first triggering mechanism, which may optionally be encapsulated, having a first release time of between about 5 and 60 minutes; and a second triggering mechanism having a second release time that is different than the first release time
Data Source
AI summary
An absorbent article has an absorbent composite that includes a water-insoluble fibrous matrix, a superabsorbent polymer composition that has an initial absorbent capacity of at least about 5 grams of saline per gram of superabsorbent polymer composition; and a first triggering mechanism having a first release time of between about 5 and 60 minutes, and a second triggering mechanism. The superabsorbent polymer composition may have a second absorbent capacity that is at least about 25% greater than the first absorbent capacity as measured by the mCRC Test.