Sanitary Napkin Side Emboss Pattern for Adhesion and Flexibility
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Solution Overview
Problem
Existing absorbent articles face issues with flexibility and adhesion strength when curved along the body, leading to potential detachment and leakage, due to continuous emboss patterns that compromise skin contact and movement compatibility.
Innovation Solution
The absorbent article features a side sheet with large embosses that sink into the non-skin side, providing strong adhesion, and small embosses arranged in a wave pattern between them, enhancing flexibility and skin feel by dispersing contact points.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a continuous emboss pattern is formed on the side sheet, then adhesion strength between side sheet and front-surface sheet is improved, but flexibility with respect to body curve deteriorates
Solution Approach 1:
The continuous emboss pattern is divided into discrete embosses arranged in a specific pattern. The embosses are positioned at intervals rather than forming a continuous line, creating segmented attachment points that maintain adhesion while allowing flexibility between the emboss locations.
Solution Approach 2:
Different regions of the side sheet have different emboss characteristics. The emboss pattern is designed with varying density and distribution - denser in regions requiring stronger adhesion, sparser in regions requiring greater flexibility. This local variation optimizes both adhesion strength and flexibility in different areas.
2Strength
If embosses are arranged densely to improve adhesion, then joining strength is improved, but skin feel and flexibility deteriorate
Solution Approach 1:
The embosses are segmented and spaced apart rather than densely packed. This segmentation reduces the total contact area with the skin while maintaining sufficient joining strength through strategic positioning of embosses at critical attachment points.
Solution Approach 2:
Instead of providing uniform dense embossing across the entire side sheet, the invention uses partial embossing at specific locations where adhesion is most needed. This partial action approach achieves sufficient joining strength without the excessive skin contact that would deteriorate skin feel.
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 configuration ensures strong adhesion and flexibility, preventing detachment and improving skin feel by maintaining adhesion strength and flexibility during body movement.
Implementation Method 1
a side emboss is formed on a skin side of a laminated part of the side sheet and the liquid permeable front-surface sheet by fusing the side sheet and the liquid permeable front-surface sheet
Data Source
Figure 1
Figure 2
Figure 3(A)~3(C)
AI summary
[Problem] To strongly join a side sheet and a front-surface sheet to prevent detachment, and to improve the feel against the skin by making fit flexibly to a body. [Means for Solving the Problem] On a skin side of a laminated part of a side sheet 7 and a liquid permeable front-surface sheet 3, a side emboss that sinks in toward a non-skin side and is made by fusing the side sheet 7 and the liquid permeable front-surface sheet 3 is formed. The side emboss 10 is comprised of a plurality of large embosses 11, 11 formed to have a relatively larger area that are arranged to align linearly along the longitudinal direction of a sanitary napkin 1 with equal intervals, and between the adjacent large embosses 11, 11, a plurality of small embosses 12 ... formed to have a relatively small area that are arranged in a wave-like shape along the longitudinal direction of the sanitary napkin 1 with intervals, separated from the large embosses 11.