Back-Waist Guard Pockets for Low-Viscosity Leakage Containment
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Solution Overview
Problem
Pant-type absorbent articles face challenges in preventing leakage of low viscosity bodily exudates through the waist opening, particularly when the wearer is lying down, due to structural limitations and lack of effective size adjustment, and there is a need for a cost-effective solution.
Innovation Solution
Incorporating a waist guard with two pockets, each with elastic portions, in the back waist region of the absorbent article, where the second pocket has a larger surface area than the first, to enhance fit and prevent leakage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If the waist opening is made with less material for breathability, then comfort and breathability are improved, but leakage prevention capability deteriorates
Solution Approach 1:
The waist guard is divided into multiple functional layers including a liquid impermeable layer, pockets for receiving exudates, and elastic portions. This segmentation allows each layer to perform its specific function - the liquid impermeable layer prevents leakage while the pocket structure provides containment, thereby maintaining leakage prevention without compromising breathability of the overall waist opening structure.
Solution Approach 2:
The waist guard acts as an intermediary component between the wearer's skin and the absorbent article's main body. It provides a protective barrier that prevents low viscosity exudates from leaking through the waist opening while allowing the main absorbent article to maintain its breathability design with less material.
2Adaptability or versatility
If the elastic belt region is made very stretchable for size adjustment, then adaptability is improved, but structural stability and fit reliability deteriorate
Solution Approach 1:
The elastic portions are strategically positioned at specific locations within the waist guard (at the open edges of pockets) rather than throughout the entire structure. This localized elasticity provides size adjustment capability where needed while maintaining structural stability in the main body of the waist guard and absorbent article, resolving the contradiction between adaptability and fit reliability.
Solution Approach 2:
The elastic portions enable the waist guard to dynamically adapt to different wearer sizes and movements. The elastic regions can stretch and retract as needed, providing continuous size adjustment while the non-elastic portions maintain overall structural integrity, allowing the device to transition between different states while maintaining reliability.
3Reliability
If a waist guard with multiple pockets is added to prevent leakage, then leakage prevention is improved, but device complexity increases
Solution Approach 1:
The waist guard employs a nested structure where pockets are formed within layers of the waist guard itself. The liquid impermeable layer forms the base, and pockets are created by folding and layering additional material over it, with elastic portions integrated into the pocket edges. This nesting approach creates multiple functional pockets without requiring separate components, thereby improving leakage prevention while controlling structural complexity.
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 waist guard effectively prevents leakage of low viscosity bodily exudates by providing enhanced fit and adjustability, while maintaining comfort and economic production.
Implementation Method 1
The first pocket comprises at least a first elastic portion provided at or adjacent to the first open edge and the second pocket comprises at least a second elastic portion provided at or adjacent to the second open edge
Data Source
AI summary
The invention relates to an absorbent article with a waist guard disposed in the back waist region. The waist guard comprises one or more waist guard sheets, and at least a first and a second pocket. The first pocket is formed by the one or more waist guard sheets, and the second pocket is at least partially provided between the topsheet and the first pocket.