Pant-Type Absorbent Article With Differential Waist Guard Elasticity
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Solution Overview
Problem
Pant-type absorbent articles face challenges in preventing leakage of low viscosity bodily exudates through the waist opening while maintaining good stretchability, fit, comfort, and breathability, particularly when the wearer is in a lying position.
Innovation Solution
The absorbent article features a waist guard portion on the elastic belt with a higher tensile stress than the correlated portion, forming a pocket that effectively contains low viscosity exudates, and is divided into zones to provide differential tensile stress for a snug fit and comfort, using a simple laminate structure with elastic members.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If the waist opening is made with less material for breathability, then breathability is improved, but leakage prevention capability deteriorates
Solution Approach 1:
The waist opening is segmented into a breathable base structure and a separate guard portion that can be added selectively. The guard portion is divided into a waist guard portion and a correlated portion, allowing the breathable structure to remain open while adding protection only where needed at the posterior waist area.
Solution Approach 2:
The guard portion is positioned specifically at the posterior waist area where leakage risk is highest, rather than uniformly increasing material throughout the entire waist opening. This localized approach maintains breathability in non-critical areas while providing enhanced leakage prevention where it is most needed.
2Ease of operation
If the elastic belt is made very stretchable for ease of application, then ease of operation is improved, but fit reliability deteriorates
Solution Approach 1:
The elastic belt is designed with dynamic elasticity that allows high stretch during application for ease of use, but provides reliable fit when in use. The guard portion with its specific tensile stress characteristics (higher than the correlated portion) ensures that while the belt can be easily stretched on, it maintains proper fit and prevents sagging during wear.
3Reliability
If material is added to prevent leakage, then leakage prevention is improved, but device complexity increases
Solution Approach 1:
The guard portion is merged with the elastic belt to form an integrated structure. The waist guard portion and correlated portion are combined in a way that provides leakage prevention while maintaining the simplicity of the overall pant-type article construction, avoiding the need for separate complex components.
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 prevents leakage of low viscosity exudates while ensuring ease of application, good fit, comfort, and breathability, with a simple and cost-effective manufacturing process.
Implementation Method 1
the waist guard portion comprising a waist guard elastic portion having a longitudinal dimension of no greater than 40mm, wherein the remainder of the front and/or back elastic belt comprising the waist guard portion and superposing the waist guard elastic portion is defined a correlated portion, wherein the tensile stress of the waist guard elastic portion is higher than that of the correlated portion
Data Source
Figure 1
Figure 2A
Figure 2B~2C
AI summary
A pant type absorbent article (20) has a waist guard portion (WGP) on the front elastic belt (84) and/or the back elastic belt (86), wherein the waist guard portion (WGP) has a specific location in view of the location from the distal edge to the proximal edge relative to the percentage of the seam length (LS), the waist guard portion (WGP) comprising a waist guard elastic portion (WGEP) having a longitudinal dimension of no greater than about 40mm, wherein the remainder of the elastic belt (84, 86) superposing the waist guard elastic portion (WGEP) is defined a correlated portion (CP), wherein the tensile stress of the waist guard elastic portion (WGEP) is higher than that of the correlated portion (CP).