Differentiated Fecal Containment Flaps for Absorbent Articles
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Solution Overview
Problem
Conventional bowel movement (BM) containment flaps in absorbent articles fail to effectively manage pasty BMs, leading to leakage and skin exposure due to inadequate seal and lateral movement issues, especially as babies transition to solid foods, increasing the viscosity of BMs.
Innovation Solution
The absorbent article features a pair of BM containment flaps with a first portion in the front waist region and a second portion in the rear waist region, where the second portion has distinct properties such as higher bending stiffness, coefficient of friction, and thickness to enhance sealing and resistance against lateral movement, thereby improving containment and reducing skin exposure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional BM containment flaps are used, then the article structure is simple, but the flaps cannot effectively contain pasty BMs due to inadequate seal and lateral movement
Solution Approach 1:
The containment flap is divided into a first portion and a second portion with different properties. The second portion has higher bending stiffness, higher coefficient of friction, and greater thickness compared to the first portion. This local differentiation allows the flap to provide both flexibility for comfort and stiffness for effective containment of pasty BMs, resolving the contradiction between containment effectiveness and structural simplicity.
Solution Approach 2:
The containment flap uses a composite structure combining materials with different properties in the first and second portions. This composite approach enables the flap to simultaneously achieve adequate seal (through higher friction and thickness in the second portion) and resistance to lateral movement (through higher bending stiffness), while maintaining reasonable structural complexity.
2Reliability
If the flap material is made thicker and stiffer to improve sealing, then containment effectiveness improves, but flexibility and comfort may deteriorate
Solution Approach 1:
The flap structure applies local quality by concentrating the thicker, stiffer material properties specifically in the second portion where sealing is most critical. The first portion maintains lower thickness and bending stiffness to preserve flexibility and comfort. This localized differentiation resolves the contradiction between seal quality and flap flexibility.
3Reliability
If the flap has high resistance to lateral movement, then BM containment improves, but the flap may not conform well to the wearer's skin
Solution Approach 1:
The flap design uses local quality by making only the second portion (where lateral movement resistance is most needed) have higher bending stiffness. The first portion maintains lower stiffness to allow better conformity to the wearer's skin contours. This spatial differentiation of material properties resolves the contradiction between lateral movement resistance and skin conformity.
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
The design provides a tighter seal between the flaps and the skin, effectively containing pasty BMs and reducing skin exposure, leading to better skin health, reduced leakage, and increased comfort for the wearer.
Implementation Method 1
the second portion having one or more different properties from the first portion... the second portion of the containment flaps is able to provide an improved seal between the flap body facing surface and the skin of the buttocks of the wearer
Implementation Method 2
the second portion having one or more different properties from the first portion... the improved flaps are better at maintaining their positioning on the wearer's buttocks, resisting lateral movement during a BM
Data Source
AI summary
An absorbent article can include a chassis including an absorbent body. The chassis can include a body facing surface. The absorbent article can also include a pair of body exudate containment flaps attached to the body facing surface of the chassis. The containment flaps can include a first portion located in the front portion of the absorbent article and chassis, and a second portion located in the rear portion of the absorbent article and chassis. The second portion of the containment flaps can have one or more properties that are different than one or more properties of the first portion of the containment flaps to reduce the lateral flow of body exudates out the sides of the absorbent article.