Multi-Layer Cushion Layer for Grit-Reducing Absorbent Articles
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Solution Overview
Problem
Absorbent articles with high superabsorbent polymer content and minimal cellulose fibers can result in a gritty feeling due to the hardness of the superabsorbent particles, which is undesirable for user comfort.
Innovation Solution
A cushion layer with at least two sub-layers, having varying widths and attachment patterns, is introduced between the absorbent core and the backsheet to provide enhanced cushioning and flexibility, while minimizing material usage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If a high proportion of superabsorbent polymers is used in the absorbent core with minimal cellulose fibers, then absorbency is improved, but the article develops a gritty feeling that reduces comfort
Solution Approach 1:
A cushion layer comprising at least two sub-layers is introduced as an intermediary between the absorbent core and the backsheet. This cushion layer masks the gritty feeling of superabsorbent particles while maintaining the high absorbency benefits, effectively mediating between the absorbent core and the user's skin.
Solution Approach 2:
The cushion layer is designed with varying basis weights across different regions - a first sub-layer with a first basis weight and a second sub-layer with a second basis weight different from the first. This local variation in cushioning properties addresses the gritty feeling where it is most needed while optimizing overall comfort and performance.
2Object-affected harmful factors
If a multi-layer cushion layer is added to mask the gritty feeling, then comfort is improved, but the device complexity increases
Solution Approach 1:
The cushion layer is segmented into at least two sub-layers with different basis weights, allowing each sub-layer to perform its function optimally while collectively solving the comfort issue. This segmentation enables targeted cushioning without requiring a completely complex multi-component system.
Solution Approach 2:
The cushion layer serves multiple functions simultaneously: it masks the gritty feeling of superabsorbent particles, provides additional comfort, and can be configured to manage fluid distribution. This multi-functionality reduces the need for separate components, thereby limiting the increase in device complexity.
3Object-affected harmful factors
If the cushion layer has higher basis weight in the central area, then cushioning performance is improved where needed, but material usage increases
Solution Approach 1:
The cushion layer employs local quality by having the first sub-layer with a higher basis weight in the central area where cushioning is most needed, while the second sub-layer provides different cushioning properties in the lateral areas. This localized approach optimizes cushioning performance without uniformly increasing material usage across the entire article.
Solution Approach 2:
Instead of providing uniform cushioning across the entire surface, the invention applies partial action by concentrating the higher basis weight cushioning material only in the central area where it is most needed, rather than excessively using material throughout the entire cushion layer.
Data Source
AI summary
An absorbent article having a liquid-permeable topsheet, a liquid-impermeable backsheet, an absorbent core, and a cushion layer between the absorbent core and the backsheet is presented. The cushion layer includes at least two sub-layers. The sub-layers advantageously have different widths or are bonded to each other by one or more longitudinally-extending attachment areas.