Dual Fastening System for Absorbent Articles
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Solution Overview
Problem
Conventional absorbent articles, such as diapers, often experience leakage and sagging due to shear stress from wearer movement, particularly when using a single fastening system, leading to discomfort and irritation from secondary fastening components.
Innovation Solution
The absorbent article incorporates a dual fastening system with primary and secondary fastening components, where the secondary fastening system is designed for improved pliability and positioned to secure the article around the waist, reducing the likelihood of pop-opens and irritation, using materials like elastomeric and non-elastomeric portions with hook and loop fasteners.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single fastening system is used, then the device complexity is reduced, but the reliability of attachment deteriorates due to shear stress from wearer movement causing fastening tabs to loosen or come unfastened
Solution Approach 1:
The fastening system is divided into two independent fastening systems: a primary fastening system with first fastening components and a secondary fastening system with second fastening components. Each system operates independently to provide attachment, distributing the stress and improving reliability without requiring a single complex fastening mechanism.
2Reliability
If secondary fastening components are added to improve attachment reliability, then the reliability of attachment improves, but the object-affected harmful factors increase due to irritation from secondary fastening components on the wearer
Solution Approach 1:
The second fastening components are specifically positioned in the crotch region rather than distributed across the entire waistband. This localized placement provides additional attachment reliability where it is most needed to prevent leakage and sagging, while minimizing the surface area that contacts the wearer's skin and reduces irritation.
3Reliability
If secondary fastening components are positioned to secure the article around the waist, then the reliability of attachment improves, but the object-affected harmful factors increase due to irritation from fastener contact with wearer's leg
Solution Approach 1:
The second fastening components are positioned asymmetrically in the crotch region rather than symmetrically around the entire waist. This asymmetric placement targets the specific area needing reinforcement for attachment stability while avoiding symmetric distribution that would increase contact and irritation with the wearer's legs.
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 dual fastening system ensures secure attachment and reduced irritation, maintaining stability during wearer movement while minimizing the risk of leakage and sagging, providing enhanced protection and comfort.
Implementation Method 1
using materials like elastomeric and non-elastomeric portions with hook and loop fasteners
Data Source
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AI summary
An absorbent article is provided. The absorbent article includes an absorbent assembly having a liquid permeable inner layer, an outer layer, and an absorbent body between the inner and outer layers. A pair of ears extend transversely outward from opposite sides of the absorbent assembly in a back waist region, each of the ears having a primary first fastening- component that is selectively engagable with a primary second fastening-component in a front waist region. There is a pair of spaced-apart secondary first fastening-components disposed on the outer layer in the front waist region, each of the secondary first fastening-components being selectively engageable with the secondary second fastening-components. Each secondary first fastening- component fits into a fastener region, wherein each fastener region is defined by an outline. Each outline has a waist edge and an opposite leg edge connected by an outer edge and an inner edge. The length of the outer edge is shorter than the length of the inner edge.