Absorbent Article Fastening System Stiffness and Placement
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Solution Overview
Problem
Conventional absorbent articles, such as diapers, face issues with leakage and sagging due to loose fastening systems, especially when subjected to movement, and suffer from packaging and manufacturing drawbacks like delamination and tearing, primarily caused by the placement and stiffness of secondary fastening components.
Innovation Solution
The absorbent article incorporates a primary and secondary fastening system with secondary first fastening components having reduced stiffness and peak load, positioned to avoid engagement with the bodyside liner or outer cover during folding, ensuring secure attachment and easy packaging without causing damage or discomfort.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If secondary fastening components are placed on the outer surface of the article at the first waist portion, then secure attachment is improved, but packaging and manufacturing issues worsen due to delamination and tearing
Solution Approach 1:
The patent extracts the secondary fastening components from the outer surface placement and repositions them to the inner surface of the front portion of the absorbent article. This extraction from the problematic outer surface location eliminates the delamination and tearing issues during packaging while maintaining the secure attachment function through the fastening system's engagement with the back portion.
Solution Approach 2:
The patent inverts the conventional placement approach by positioning the secondary fastening components on the inner surface rather than the outer surface. This inversion resolves the packaging issues caused by outer surface placement while achieving secure attachment through the fastening mechanism's engagement with the back portion of the article.
2Reliability
If secondary fastening components have high stiffness and peak load, then secure attachment is improved, but discomfort and damage to the article worsen
Solution Approach 1:
The patent changes the physical parameters of the secondary fastening components by specifying reduced stiffness and peak load values. This parameter modification allows the fastening system to provide secure attachment while minimizing discomfort to the wearer and preventing damage to the bodyside liner or outer cover during folding and wear.
Solution Approach 2:
The patent applies different mechanical properties to different parts of the fastening system. The secondary fastening components are designed with locally optimized reduced stiffness and peak load characteristics compared to the primary fastening system, allowing them to provide secure attachment without causing discomfort or damage to specific areas of the article.
3Reliability
If secondary fastening components are positioned near the bodyside liner or outer cover, then secure attachment is improved, but packaging issues worsen due to engagement during folding
Solution Approach 1:
The patent extracts the secondary fastening components from the problematic positioning near the bodyside liner or outer cover and repositions them to the inner surface of the front portion. This extraction eliminates the engagement issues during folding that cause packaging problems while maintaining secure attachment through engagement with the back portion.
Solution Approach 2:
The patent uses the inner surface of the front portion as an intermediary positioning location for the secondary fastening components. This intermediary position allows the fastening system to engage with the back portion for secure attachment while avoiding direct contact and engagement with the bodyside liner or outer cover during folding operations.
Data Source
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AI summary
An absorbent article is provided. The absorbent article includes a bodyside liner, an outer cover, and an absorbent core between the liner and the outer cover. The absorbent article further includes a pair of ears extending outward from the opposite sides of the absorbent article, and a fastening system having a primary fastening system and a secondary fastening system. The primary fastening system includes a primary first fastening component disposed on each of the pair of ears and a primary second fastening component disposed on the outer surface of the article. The secondary fastening system includes a secondary second fastening component on each of the pair of ears and a corresponding secondary first fastening component on the outer surface of the article. Each of the secondary first fastening components has a stiffness in the longitudinal direction of the article of less than 185 milligrams according to a Gurley Stiffness Test.