Absorbent Article Composite Sheet Top Surface Friction and Leakage
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional absorbent articles face issues with skin friction and leakage due to misalignment between the topsheet and skin, and the spread of liquid excrement along central continuous projections, which affects comfort and leakage prevention.
Innovation Solution
A composite sheet topsheet with oblique bonding portion rows and elongated projections that deform to reduce skin friction and prevent side leakage, featuring a configuration of laterally long projections surrounded by bonding portions and short bonding portions to enhance texture and liquid distribution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If central continuous projections are formed to improve texture and air permeability, then comfort is improved, but liquid excrement spreads along the projections causing side leakage
Solution Approach 1:
The continuous projections are divided into separate laterally long projections that are dispersed in the longitudinal and width directions. Each projection is surrounded by bonding portions that act as barriers, preventing liquid from spreading continuously across the topsheet while maintaining the comfort benefits of the projections.
Solution Approach 2:
The bonding portions are strategically positioned to surround each laterally long projection, creating localized barriers that prevent liquid spread in critical areas while allowing the projections to maintain their comfort-providing structure in skin-contact regions.
2Ease of operation
If projections are formed to reduce contact area and friction, then comfort is improved, but the bonding structure becomes more complex
Solution Approach 1:
The bonding portions serve dual functions: they bond the first and second sheets together structurally, and simultaneously act as barrier elements that prevent liquid spread. This merging of structural and functional roles simplifies the overall design despite the presence of multiple projections.
Solution Approach 2:
The bonding portions perform multiple functions: structural bonding between sheets, definition of projection boundaries, and liquid spread prevention. This multi-functionality reduces the need for additional separate components.
Data Source
AI summary
An absorbent article includes a topsheet comprising a composite sheet. In the composite sheet, projections that protrude toward the skin of the wearer are formed by a first sheet protruding in a direction away from a second sheet at portions other than bonding portions. A plurality of first oblique bonding portion rows and a plurality of second oblique bonding portion rows are formed, and a long bonding portion elongated in a longitudinal direction is formed at each intersection of the first oblique bonding portion rows and the second oblique bonding portion rows. Laterally long projections elongated in a width direction are formed in a dispersed manner in the longitudinal direction and the width direction. Each laterally long projection is surrounded by two first oblique bonding portion rows and two second oblique bonding portion rows, and the long bonding portion is formed between adjacent laterally long projections in the width direction.