Disposable Pull-On Diaper Elastic Region Segmentation
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Solution Overview
Problem
Disposable pull-on diapers often deform convexly towards the wearer's skin, compressing male genitalia and failing to ensure a comfortable fit for male incontinence patients.
Innovation Solution
The design includes a lower torso cover with lateral direction elastic elements and an absorbent chassis with a front end portion not joined to the elastic region, allowing the absorbent chassis to protrude and create space for male genitalia, featuring a tubular shape with a front waist region, back waist region, and crotch region, and a cover sheet extending outward beyond the absorbent body.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Shape
If elastic elements are attached under tension to the lower torso cover in the lateral direction, then the absorbent structure is deformed convexly toward the wearer's skin, but this compresses male genitalia and fails to ensure comfortable fit
Solution Approach 1:
The lower torso cover is segmented into an elastic region (front waist region and back waist region) and a non-elastic region (crotch region). The elastic elements are attached only to the elastic region, excluding the crotch region from elastic deformation. This segmentation allows the front and back waist regions to deform convexly for good fit while the crotch region remains non-elastic to avoid compressing male genitalia.
Solution Approach 2:
Different regions of the lower torso cover are assigned different elastic properties: the front waist region and back waist region have elastic elements for convex deformation and good fit, while the crotch region is designed as a non-elastic region to prevent compression of male genitalia. This local differentiation of material properties resolves the contradiction between overall fit and localized comfort.
2Ease of operation
If the absorbent structure is deformed convexly toward the wearer's skin, then good fit of the diaper to the wearer's body is achieved, but it is hard to say this absorbent article ensures comfortable fit for male users
Solution Approach 1:
The lower torso cover is divided into elastic and non-elastic regions. The elastic region (front and back waist regions) provides convex deformation for good overall fit, while the non-elastic crotch region ensures comfort for male users by preventing compression of genitalia.
Solution Approach 2:
The crotch region is specifically designed with non-elastic properties to provide localized comfort for male users, while the rest of the lower torso cover maintains elastic properties for overall good fit. This local quality differentiation resolves the contradiction between general fit and specific comfort requirements.
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 configuration reduces the apparent width of the absorbent chassis, allowing it to protrude and create space for male genitalia, facilitating a comfortable and secure fit for male users.
Implementation Method 1
When the elastic elements contract on the bottom surface side of the absorbent structure, this absorbent structure is deformed so as to be convexly toward the wearer of the absorbent article
Data Source
AI summary
A disposable pull-on diaper that keeps in close contact with a wearer's crotch region includes a lower torso cover and an absorbent chassis. The absorbent chassis has a front end portion overlapping a front waist region of the lower torso cover and a front end portion of the front end portion is joined to an elastic region in the lower torso cover. A front end adjoining portion of the front end portion is not joined to the elastic region. An area in the absorbent chassis being adjacent the front end adjoining portion on the side of the crotch region is joined to an inelastic region defined on the side closer to the crotch region than to the elastic region. The absorbent body contained in the absorbent chassis extends at least from the crotch region to the front end adjoining portion. The front end portion in the front end portion of the absorbent chassis is defined by a portion of the cover sheet wrapping the absorbent body which extends outward beyond the absorbent body.