Absorbent Article Front Surface Sheet with Asymmetrical Convex Portions
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Solution Overview
Problem
Existing absorbent articles face issues with stuffiness due to air passage reduction and fluid leakage, as previous designs either create air passages that allow stuffiness or prevent fluid leakage but not both effectively.
Innovation Solution
A front surface sheet with ridged convex portions in the longitudinal direction and dot-like concave embossments in a zigzag pattern, reducing skin contact area and creating asymmetrical convex portions for air passage and fluid absorption, respectively.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If convex portions and concave portions are arranged in a zigzag pattern to prevent fluid leakage, then fluid absorption is improved, but air passage is blocked causing stuffiness
Solution Approach 1:
The front surface sheet is segmented into distinct functional zones: convex portions that form air passages for ventilation, and concave embossments arranged in zigzag patterns for fluid absorption and leakage prevention. This segmentation allows simultaneous achievement of breathability and fluid management without mutual interference.
Solution Approach 2:
Different regions of the front surface sheet are given different properties: convex portions create air permeable zones for reducing stuffiness, while concave embossment zones provide fluid absorption capacity. Each region is optimized for its specific function, allowing the whole structure to achieve both ventilation and fluid leakage prevention.
2Object-affected harmful factors
If convex portions continue in one direction to create air passages, then stuffiness is reduced, but body fluid easily leaks down along the continuous concave portions
Solution Approach 1:
The concave embossments are arranged asymmetrically in a zigzag pattern rather than continuing linearly with the convex portions. This asymmetric arrangement disrupts continuous fluid flow paths while maintaining air passage functionality, preventing body fluid from leaking down along the embossments.
3Object-affected harmful factors
If the front surface sheet is provided with emboss patterns to decrease skin contact area, then skin troubles are eliminated, but the sheet structure becomes complex
Solution Approach 1:
Multiple functions are merged into a single front surface sheet structure: convex portions provide air passages for skin protection, concave embossments provide fluid absorption and leakage prevention, and the overall embossed pattern decreases skin contact area. This integration achieves multiple benefits without requiring separate components.
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 solution reduces stuffiness and prevents fluid leakage by creating air passages and ensuring fluid absorption, while maintaining a soft skin contact and effective fluid management.
Implementation Method 1
the convex portions and the concave portions were continuing in one direction linearly in parallel and the convex portion was continuing in one direction, an air passage which significantly reduced the stuffiness was created
Implementation Method 2
an absorbent article with an absorber disposed between a permeable front surface sheet and a rear surface sheet
Implementation Method 3
The concave embossments are arranged in a zigzag pattern as a whole, wherein in the front surface sheet in a cross section passing the concave embossment in the width direction an inclined surface to the concave embossment on the side adjacent to the convex portion is relatively steep, an inclined surface to the concave embossment on the side distant to the convex portion is relatively gentle
Data Source
Figure 1~2
Figure 3~4(B)
Figure 5
AI summary
PROBLEM TO BE SOLVED To provide an absorbent article to reduce stuffiness and prevent a body fluid from leaking down, provided with a front surface sheet soft to skin having a decreased area in contact with the skin. SOLUTION An absorbent article 1 with an absorber 4 disposed between a permeable front surface sheet 3 and a rear surface sheet 2 of a non-woven fabric; wherein the front surface sheet 3 is provided with ridged convex portions 7, 7 continuing in the longitudinal direction of the absorbent article 1 at a specified interval in the width direction of the absorbent article 1, and provided with dot-like concave embossments 8a, 8b at the right side adjacent position and the left side adjacent position alternately at an interval in the longitudinal direction of the absorbent article 1 on the both sides of each of the convex portions 7, 7, and the concave embossments 8a, 8b are arranged in a zigzag pattern as a whole. The convex portion 7 is an inclined surface having a relatively steep gradient on one side and a relatively gentle gradient on the other side, and the cross-sectional shape of the convex portion 7 is an asymmetrical shape.