Absorbent Article Outwardly Convex Channels Leakage Prevention
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Solution Overview
Problem
Conventional sanitary napkins fail to conform closely to the body, leading to potential leakage at the central, rear, and side edges, despite their increased length and thickness, which compromises protection from soiling.
Innovation Solution
The design incorporates a pair of outwardly convex longitudinal central channels in the absorbent article, which decreases in traversal distance towards both ends, creating a central closed area, along with rear and front channels, and side flaps to enhance fit and fluid management, preventing leakage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If increased product length and thickness are used, then protection from soiling is improved, but fit to the body deteriorates
Solution Approach 1:
The absorbent article is divided into multiple functional regions: a central region with outwardly convex longitudinal channels for fluid collection, rear end regions with inwardly concave channels for fitting, and side regions with flaps for containment. This segmentation allows each region to perform its specific function optimally while maintaining overall protection and fit.
Solution Approach 2:
Different regions of the absorbent article have different structural characteristics tailored to their specific functions. The central region has convex channels for fluid accumulation, the rear ends have concave channels for body contouring, and side flaps provide lateral containment. This local differentiation resolves the contradiction by optimizing both fit and protection in their respective locations.
2Reliability
If conventional thick sanitary napkin products are used, then protection is improved, but leakage at central and rear regions increases
Solution Approach 1:
The patent employs curved channel structures throughout the absorbent article. The outwardly convex longitudinal channels in the central region and inwardly concave channels at the rear ends create a three-dimensional contoured surface that conforms to the body's anatomy. This curvature enables the thick product to wrap around and fit the body contours, preventing leakage at the central and rear regions while maintaining protection.
3Quantity of substance
If increased product thickness is used, then absorbency capacity is improved, but conformability to body contours deteriorates
Solution Approach 1:
The channel structures are formed within the thickness of the absorbent article, creating nested contours that fit within the overall product profile. The outwardly convex and inwardly concave channels are integrated into the layered structure, allowing the thick product to maintain its volume for absorbency while the channels provide internal contouring for body conformability.
Data Source
AI summary
An absorbent article having a pair of longitudinal edges, front and rear transverse edges, a front end region, a rear end region, and a central region disposed between the front and rear end regions. The absorbent article has a liquid pervious topsheet, a liquid impervious backsheet, an absorbent core disposed between the topsheet and the backsheet, a pair of outwardly convex longitudinal central channels formed at least in the central region. The traversal distance of the pair of outwardly convex longitudinal central channels decreases towards both ends of the channels to define a central closed area. The absorbent article has a rear channel defining a rear closed area in the rear end region.