Absorbent Article Leakage Prevention via Backsheet Extension
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing disposable diapers face issues with leakage of bodily liquids due to the dispersion of liquids beyond the absorption area, which compromises wearing comfort, especially when the absorption member and liquid-impermeable sheet are not adequately positioned to prevent leakage.
Innovation Solution
The disposable diaper design includes an absorber with its rear end positioned in the crotch region and a liquid-impermeable absorber backsheet on the non-skin contact side, with the rear end of the absorber backsheet extending into the rear waistline region, ensuring that at least one end of the absorber is outside the crotch region in the longitudinal direction to prevent leakage while improving ventilation and comfort.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the absorption member and liquid-impermeable sheet are disposed at the crotch side than the waistline gather to improve ventilation property, then wearing comfort is improved, but bodily liquid may disperse to the waistline gather side and cause leakage
Solution Approach 1:
The patent extends the liquid-impermeable sheet in the longitudinal direction beyond the absorption member's boundaries. Specifically, the liquid-impermeable sheet has a front end disposed forward of the absorption member's front end and a rear end disposed rearward of the absorption member's rear end, creating an overlapping region with the waistline gather. This dimensional extension in the longitudinal direction allows the liquid-impermeable sheet to prevent leakage while maintaining the absorption member's position for ventilation.
2Reliability
If the absorption member is positioned to prevent leakage, then reliability is improved, but ventilation property and wearing comfort may be compromised
Solution Approach 1:
The patent divides the functional regions by separating the absorption member from the liquid-impermeable sheet in the longitudinal direction. The absorption member is confined to the crotch region for optimal ventilation, while the liquid-impermeable sheet extends beyond the absorption member's front and rear ends to provide leakage prevention. This segmentation allows each component to perform its specific function without compromising the other.
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 effectively prevents leakage of bodily liquids and enhances wearing comfort by ensuring that the absorber and liquid-impermeable sheet do not overlap, maintaining ventilation properties and reducing material costs without compromising absorption speed.
Implementation Method 1
A bodily liquid discharged from a wearer is absorbed by an absorption member disposed so as to come into contact with a crotch of the wearer
Implementation Method 2
a liquid-impermeable sheet (absorber backsheet 30) which is positioned at the outer direction side of the absorber
Data Source
AI summary
An absorbent article that has an absorber which is disposed in the crotch region and an absorber backsheet which is positioned at the outer direction side of the absorber. At least either one of a front end of the absorber and a rear end of the absorber is disposed in the crotch region. In the front end of the absorber backsheet and the rear end of the absorber backsheet, an end at a side at which the absorber is positioned in the crotch region is disposed outboard of the crotch region in the longitudinal direction.