Disposable Diaper Crotch Through Sections for Leakage Prevention
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Solution Overview
Problem
Disposable diapers face leakage issues due to a small surface space between the diaper and the body, particularly in men, where the scrotum adheres to the diaper, blocking urine flow and leading to leakage around the groin area.
Innovation Solution
A disposable diaper design featuring a crotch portion with an absorbent body that includes a through section and thin sections forming surface depressions, which expand when worn to create a larger surface space for urine absorption, preventing diffusion blockage and leakage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conventional absorbent body structure is used, then the diaper can be manufactured simply, but the surface space is too small to allow urine diffusion, causing leakage
Solution Approach 1:
The absorbent body is divided into multiple through sections that extend in the thickness direction, creating separate pathways for urine diffusion. This segmentation allows urine to flow through multiple routes simultaneously, increasing the effective surface space without significantly increasing the overall diaper size or structural complexity.
Solution Approach 2:
The invention introduces through sections that extend in the thickness direction (vertical dimension) rather than only in the plane of the absorbent body. This dimensional change creates additional pathways for urine diffusion, effectively increasing the surface space available for urine absorption without expanding the horizontal footprint of the diaper.
2Reliability
If the surface space is increased to prevent leakage, then urine diffusion is improved, but the diaper cannot be compressed properly in the wearing state
Solution Approach 1:
The through sections are strategically positioned in specific areas of the absorbent body where they are most needed for urine diffusion. This localized approach allows the diaper to maintain its compressible structure in other areas while providing enhanced urine flow paths in critical regions, balancing leakage prevention with wearing comfort.
3Reliability
If through sections are added to the absorbent body, then urine diffusion is improved, but the manufacturing process becomes more complex
Solution Approach 1:
The through sections are integrated into the absorbent body as a unified structure rather than being separate components. This merging of the through sections with the absorbent body allows for streamlined manufacturing processes, reducing the number of assembly steps while still achieving the desired urine diffusion capability.
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 effectively maintains a larger surface space for urine absorption, preventing leakage by allowing urine to flow backward into the absorbent body, even when the surface space is small, thus improving the diaper's leakage prevention properties.
Implementation Method 1
when the disposable diaper is put between both legs and compressed in a width direction in a wearing state, a depression is formed on the diaper surface as the area for forming surface depression is deformed outward in order from the center in the width direction so as to be pushed out from the diaper
Implementation Method 2
an absorbent body extending from the crotch portion to the back side part for absorbing urine
Implementation Method 3
the absorption of the urine is too late to be effective, and a traveling time of the urine on the disposable diaper surface is long
Data Source
AI summary
The present invention aims at providing a disposable diaper having excellent maintainability of a surface space and capable of being easily produced. It is characterized in that a lower layer absorbent body has, at least at center of a crotch portion in a width direction, an elongated lower layer through section piercing in a thickness direction and extending in a front-back direction; an upper layer absorbent body has an upper layer through section piercing in the thickness direction at least within a range corresponding to the lower layer through section in the front-back direction, the upper layer through section has an elongated middle section extending in the front-back direction so as to be located above the lower layer through section, and extending sections which extend, in the width direction, from both sides of a back side position of the middle section, and a side edge of the extending section has a shape in which at least a part of the front side thereof is located further outside in the width direction toward the back side.