Absorbent Article Embossed Portions Concave Outlines Fluid Diffusion
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Solution Overview
Problem
Conventional absorbent articles with continuous linear or dot-like embossed portions suffer from excessive body fluid diffusion, conspicuous liquid intensive regions, and poor touch feeling due to high-density fiber regions and uneven fiber distribution.
Innovation Solution
The absorbent article features embossed portions with concave outlines formed by curved lines on a skin side surface, arranged in a staggered pattern with corners facing each other, reducing fluid diffusion and fiber density, and maintaining a smooth touch.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If continuous linear embossed portions are formed to improve absorption performance, then body fluid absorption is enhanced, but body fluid diffusion along the embossed portions increases causing conspicuous appearance
Solution Approach 1:
The continuous linear embossed portions are divided into multiple discrete embossed portions arranged in a specific pattern. This segmentation prevents the formation of continuous diffusion paths for body fluid, thereby reducing the diffusion range and improving appearance while maintaining absorption capacity through the distributed embossed structures
Solution Approach 2:
The embossed portions are designed with asymmetric shapes including triangular, trapezoidal, and irregular forms rather than uniform shapes. This asymmetric arrangement creates varied flow paths and prevents regular diffusion patterns, reducing the conspicuousness of body fluid while maintaining effective absorption areas
2Quantity of substance
If embossed portions are arranged in regular patterns to improve absorption, then absorption performance is enhanced, but high-density fiber regions form causing liquid intensive regions with poor appearance
Solution Approach 1:
Different regions of the top sheet are designed with different embossed portion configurations. The embossed portions are strategically placed to create local absorption zones without forming continuous high-density fiber regions. This local quality variation allows effective absorption while preventing the formation of conspicuous liquid intensive regions that would occur with uniform regular patterns
Solution Approach 2:
The embossed portions incorporate curved and irregular shapes rather than straight-line geometric forms. This curvature creates more natural fiber distribution patterns during compression, preventing the formation of sharp high-density regions that would cause conspicuous liquid intensive areas, while still providing effective absorption zones
3Object-generated harmful factors
If area of embossed portions is increased to separate liquid intensive regions, then appearance is improved, but touch feeling is deteriorated
Solution Approach 1:
Rather than increasing the area of individual embossed portions to separate liquid intensive regions, the invention uses a sufficient number of smaller embossed portions distributed across the top sheet. This partial action approach achieves the separation of liquid intensive regions and improves appearance without creating large embossed areas that would deteriorate touch feeling
Solution Approach 2:
The embossed portions are designed with porous structures that allow body fluid to be absorbed and distributed into the absorbent body without creating large continuous high-density regions. The porous nature enables effective separation of liquid intensive regions while maintaining a softer, more comfortable touch feeling compared to solid large embossed portions
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
This design minimizes body fluid diffusion and visibility while maintaining a comfortable touch, making the absorbed fluid inconspicuous and improving the overall appearance and feel of the absorbent article.
Implementation Method 1
the body fluid absorbed in a periphery by capillary action is attracted to the high-density regions around the embossed portions
Data Source
Figure 1
Figure 2~3
Figure 4~5(B)
AI summary
On a skin side surface of a liquid permeable top sheet (3), embossed portions (10, 10, ...) depressed toward a non-skin side are arranged at intervals. Each embossed portion (10) is formed in a planar shape passing through each corner (12) of an original shape (11) and having concave shaped outlines (14) each formed by a curve bulging each side (13) of the original shape toward the center. A quadrangle having four or more sides is defined as the original shape (11). Because liquid intensive regions (15) formed along a periphery of the embossed portion (10) are separated at a central portion, the liquid intensive regions (15) become less noticeable. Also, a perimeter is increased by the concave shaped outlines (14) while a compressed area is reduced, the body fluid is dispersed and a color of the body fluid becomes less noticeable without deteriorating the touch feeling.