Absorbent Article Emboss Pattern to Reduce Wrinkling and Side Leakage
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Solution Overview
Problem
Conventional absorbent articles tend to wrinkle under leg pressure, leading to increased side leakage, especially when the absorber thickness is reduced for convenience and efficiency.
Innovation Solution
The absorbent article features emboss patterns on its side portions, comprising alternately arranged straight and arc-shaped protrusions that enhance rigidity and resistance to leg pressure, directing fluid flow along the longitudinal direction to prevent wrinkling and leakage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the thickness of the absorber is reduced to make the absorbent article thinner, then the absorbent article becomes easier to carry and store, but the absorber is more likely to be wrinkled and side leakage is more likely to occur
Solution Approach 1:
The invention introduces arc-shaped portions that protrude outwardly in the width direction at the side portions of the absorber. These curved structures provide resistance to leg pressure from the outside in the width direction, preventing the absorber from being wrinkled while maintaining a thin overall profile. The arc-shaped geometry effectively distributes and resists external pressure without requiring increased thickness.
Solution Approach 2:
The side portions of the absorber are segmented into multiple straight portions and arc-shaped portions that are alternately arranged. This segmentation allows different regions to perform different functions: straight portions provide structural support while arc-shaped portions provide pressure resistance. This segmented structure prevents wrinkling without significantly increasing the overall thickness of the absorber.
2Reliability
If highly compressed areas are formed only in both side portions of the absorber, then the absorber resists wrinkling at the sides, but the effect of diffusing absorbed body fluid back and forth is reduced and body fluid is more likely to be stored in the vicinity of the discharge portion
Solution Approach 1:
The arc-shaped portions protrude outwardly and are configured to receive body fluid from the discharge portion. The curved geometry creates a fluid reception area that captures and redirects fluid laterally, preventing fluid accumulation at the discharge portion and reducing side leakage risk.
Solution Approach 2:
The alternately arranged straight and arc-shaped portions create a segmented fluid reception and diffusion path. Body fluid is received at the arc-shaped portions and guided along the straight portions, creating an effective diffusion pattern that prevents fluid storage at the discharge portion while maintaining side portion integrity.
3Shape
If simple convex curved grooves are formed in the surface sheet and absorber, then the absorber is compacted and wrinkles are reduced, but it is difficult to obtain sufficient resistance to leg pressure from the outside in the width direction
Solution Approach 1:
The invention uses outwardly protruding arc-shaped portions rather than simple convex curved grooves. These protruding structures extend beyond the surface of the absorber, creating a physical barrier that effectively resists leg pressure from the outside in the width direction while maintaining compactness.
Solution Approach 2:
The arc-shaped portions protrude outwardly in the width direction, creating an asymmetric structure that is specifically optimized to resist lateral leg pressure. This asymmetric design provides targeted strength where needed while maintaining overall compactness of the absorber.
Data Source
AI summary
On a wearer's body contact surface of a sanitary napkin, an emboss is provided in such a pattern that a plurality of straight portions and arc-shaped portions which protrude outwardly in the direction of the width of the napkin, with the ends of the straight portions being base points, are alternately arranged. A plurality of arc-shaped portions are arranged, and thus the resistance to a leg pressure from the outside in the width direction is increased, with the result that the absorber is unlikely to be wrinkled and leakage caused by the wrinkle is unlikely to occur. The flow of a body fluid diffused from the center in the width direction toward the outside in the longitudinal direction of the napkin along the straight portion is produced, and thus the diffusion in the width direction is reduced, with the result that side leakage is unlikely to occur.