Asymmetric Absorbent Article Topsheet for Fluid Management
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Absorbent articles, such as sanitary napkins and diapers, often experience shifting relative to the body, leading to uncomfortable rubbing forces and challenges in balancing fluid acquisition and comfort due to varying skin types and fluid source locations in the crotch region, where different portions of the topsheet require distinct performance characteristics.
Innovation Solution
A topsheet with a structurally modified zone and a lotion zone, where the structurally modified zone has an asymmetric long axis and comprises more than 5% of the topsheet area, providing enhanced fluid acquisition and comfort by optimizing aperture size and distribution for specific skin areas.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the topsheet uses large apertures for fluid acquisition, then fluid acquisition is improved, but fluid retention when compressed deteriorates
Solution Approach 1:
The topsheet is divided into multiple zones with different aperture characteristics. The first zone has apertures optimized for fluid acquisition, while the second zone has apertures optimized for fluid retention. This segmentation allows each zone to perform its specific function without compromising the other, resolving the contradiction between acquisition and retention.
Solution Approach 2:
Different portions of the topsheet are given different structural qualities. The first zone has larger or more open aperture structures for rapid fluid uptake, while the second zone has smaller or more controlled aperture structures for retention. This local differentiation enables simultaneous optimization of both acquisition and retention properties across the topsheet surface.
2Productivity
If the topsheet is optimized for one performance characteristic, then that characteristic is improved, but other performance characteristics deteriorate
Solution Approach 1:
The topsheet is segmented into functional zones where the first zone handles fluid acquisition and the second zone handles comfort-related functions. This allows optimization of acquisition performance in the first zone without compromising comfort in the second zone, as each zone is independently optimized for its specific purpose.
Solution Approach 2:
Different local regions of the topsheet have different material or structural qualities tailored to specific functions. The first zone has properties optimized for fluid interaction, while the second zone has properties optimized for skin comfort and contact. This local quality differentiation resolves the trade-off between acquisition performance and overall comfort.
3Adaptability or versatility
If the absorbent article shifts relative to the wearer's body, then positioning flexibility is improved, but rubbing forces and alignment with fluid sources worsen
Solution Approach 1:
The second zone is positioned asymmetrically relative to the longitudinal and transverse centerlines of the absorbent article. This asymmetric positioning ensures that the comfort-optimized zone remains aligned with key body regions (such as the perineal area) even when the article shifts during movement, thereby reducing rubbing forces while maintaining adaptability to different wear positions.
Data Source
AI summary
An absorbent article having a topsheet having a first portion and a second portion. The topsheet has a longitudinal centerline and a transverse centerline. The topsheet has an area. The second portion can differ in structure from the first portion. The second portion can have a structurally modified zone. The structurally modified zone has a periphery, a length, and a long axis. The length is the maximum straight-line dimension between two points on the periphery. The long axis extends between two points on the periphery separated by the length. The long axis of the structurally modified zone can be asymmetric to the longitudinal centerline. The structurally modified zone can make up more than about 5% of the area of the topsheet. The topsheet can have a lotion zone, the long axis of which is asymmetric to the longitudinal centerline and the transverse centerline.