Absorbent Pad Segmented Junctions for Fluid Diffusion
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Solution Overview
Problem
Existing absorbent pads for disposable diapers fail to efficiently diffuse excretory fluid across the entire surface, leading to potential leakage and discomfort for the wearer, and the presence of pulp fibers can cause discomfort both before and after excretion.
Innovation Solution
An absorbent pad design featuring a liquid permeable front sheet and a liquid permeable or impermeable rear sheet with absorbent polymer particles distributed between them, forming cells with strategically arranged junctions and openings that allow for even fluid diffusion and reduce particle concentration, enabling easy deformation and minimizing discomfort.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If the absorbent pad is made thick with pulp fibers and absorbent polymer to improve absorption capacity, then absorption performance is improved, but wearer comfort deteriorates due to rigidity and discomfort
Solution Approach 1:
The absorbent pad is divided into multiple compressed portions along the longitudinal direction, creating a segmented structure. Each compressed portion has reduced thickness compared to the overall pad, allowing the pad to be flexible and conform to the wearer's body contours while maintaining sufficient absorption capacity through the distributed compressed sections.
2Productivity
If absorbent polymer particles are concentrated in certain areas to improve absorption efficiency, then absorption performance is improved, but fluid diffusion deteriorates leading to potential leakage
Solution Approach 1:
The absorbent polymer particles are distributed non-uniformly along the longitudinal direction, with varying concentrations in different compressed portions. This local variation in particle concentration allows certain areas to have high absorption efficiency while other areas facilitate fluid diffusion, preventing leakage while maintaining overall absorption performance.
3Reliability
If the absorbent pad structure is made rigid to maintain shape and prevent leakage, then reliability is improved, but adaptability deteriorates causing discomfort during wearer movement
Solution Approach 1:
The absorbent pad employs a dynamic structure with multiple compressed portions that can deform and adapt to wearer movement. The compressed portions are designed to flex and conform dynamically, allowing the pad to maintain its functional shape for leakage prevention while adapting to the wearer's body movements, thereby providing both reliability and comfort.
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 design ensures efficient diffusion of excretory fluid across the entire surface, preventing leakage and reducing wearer discomfort by allowing the absorbent pad to move freely with the wearer's movements, maintaining high absorption performance and preventing particle concentration.
Implementation Method 1
the plurality of cells, each of which is defined by an adjacent pair of the first junctions and an adjacent pair of the second junctions, is formed between the front sheet and the rear sheet spaced apart from each other. The absorbent polymer particles are provided in the cells
Implementation Method 2
absorbent polymer particles disposed between the front sheet and the rear sheet, the absorbent polymer particles absorbing excretory fluid
Data Source
AI summary
Disclosed is an absorbent pad which efficiently diffuses excretory fluid and gives no sense of discomfort to a wearer even after excretion. A front sheet and a rear sheet are joined to each other at a plurality of first junctions and a plurality of second junctions, and when viewed in plan, the first junctions extending in a longitudinal direction are arranged at predetermined intervals in a width direction, and second junctions extending in the width direction are arranged at predetermined intervals in the longitudinal direction. A plurality of cells, each of which is defined by an adjacent pair of the first junctions and an adjacent pair of the second junctions, is formed between the front sheet and the rear sheet spaced apart from each other. An opening extending in the longitudinal direction is formed in at least one of the first junctions.