Absorbent Article Low Permeation Core Regions
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Solution Overview
Problem
Existing absorbent articles face issues where body fluid guided through pores on the topsheet does not easily absorb into the absorbent core, leading to potential skin troubles and changes in the core's rigidity and thickness after fluid absorption.
Innovation Solution
Incorporating low liquid permeation portions on the non-skin side of the topsheet and the skin side of the absorbent core, these regions have lower permeability speeds for body fluid, preventing fluid from easily entering the core and maintaining the core's rigidity and thickness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If body fluid is guided through pores on the topsheet to the non-skin side, then liquid remaining on the topsheet is prevented, but the absorbent core loses rigidity and thickness after fluid absorption
Solution Approach 1:
The absorbent core is divided into multiple absorption regions with different absorption capacities. The first absorption region has a smaller absorption amount per unit area compared to the second absorption region, allowing differential fluid distribution that maintains core structure while preventing liquid accumulation on the topsheet.
Solution Approach 2:
Different regions of the absorbent core are assigned different absorption properties. The first absorption region (corresponding to the low liquid permeation portion) has reduced absorption capacity to maintain rigidity, while the second absorption region has higher absorption capacity to handle fluid load, creating local quality variations that resolve the contradiction.
2Object-affected harmful factors
If a low liquid permeation portion is provided on the topsheet with liquid repellent applied, then liquid absorbency is reduced to prevent skin trouble, but body fluid is not easily drawn into the topsheet and remains on the surface
Solution Approach 1:
The topsheet has different liquid permeability characteristics in different regions. The low liquid permeation portion has reduced permeability to prevent skin contact with excessive fluid, while surrounding areas maintain normal permeability to allow adequate fluid drawability, creating a local quality differentiation that resolves the contradiction.
Solution Approach 2:
The absorbent core acts as an intermediary between the topsheet and the skin. By controlling the absorption characteristics of the core regions, the system mediates between the need to prevent liquid accumulation on the topsheet and the need to maintain fluid drawability, distributing fluid appropriately to prevent skin trouble while ensuring adequate absorption.
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 design effectively prevents body fluid from remaining on the topsheet, reducing the risk of skin troubles, while maintaining the absorbent core's original rigidity and thickness, ensuring consistent performance throughout use.
Implementation Method 1
a low liquid permeation portion having a lower permeability speed of body fluid permeating from a skin side to a non-skin side than a surrounding area
Implementation Method 2
The body fluid drawn in via the pores in the topsheet is guided to an absorbent core and held by the absorbent core
Data Source
AI summary
An absorbent article includes: a liquid-permeable topsheet; a liquid-impermeable backsheet; an absorbent core disposed between the topsheet and the backsheet; and one or more low liquid permeation portions each of which: has a lower permeability speed of body fluid permeating from a skin side to a non-skin side of the absorbent article than a permeability speed of the body fluid in a surrounding area of the one or more low liquid permeation portions, is disposed on the non-skin side relative to a non-skin surface of the topsheet and on the skin side relative to a non-skin surface of the absorbent core, and is disposed in a central region among three equally divided regions of the absorbent core in a width direction of the absorbent article.