Transversal Waist Barrier Patch for Absorbent Pant Leakage Control
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Solution Overview
Problem
Existing absorbent articles, particularly pants, face challenges in effectively preventing leakage of liquid exudates like urine and stool while being cost-effective and minimizing waste, with existing transversal barriers being inefficient or complex to implement, especially when using nonwoven layers.
Innovation Solution
The absorbent article incorporates a transversal waist barrier comprising a plurality of liquid retarding layers, including a liquid impermeable film layer, with optional elastic strands, and a breathable design to enhance leakage prevention, using a patch or discrete layer joined to the absorbent insert and panels, and a method involving static or dynamic folding for efficient manufacturing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a nonwoven layer is folded multiple times to form a waist guard, then a transversal barrier is provided, but the barrier is less effective at capturing liquid exudates under pressure and requires significant material length increase adding waste and cost
Solution Approach 1:
The barrier is divided into multiple functional layers (liquid impermeable layer, liquid retarding layer, breathable layer) rather than using a single folded nonwoven layer. This segmentation allows each layer to perform its specific function efficiently while reducing overall material usage and waste.
Solution Approach 2:
The barrier uses a composite structure combining different materials with complementary properties: a liquid impermeable layer (film or laminate) for blocking liquid, a liquid retarding layer for slowing liquid movement, and a breathable layer for vapor transmission. This composite approach provides superior liquid containment without requiring excessive material length.
2Ease of operation
If the nonwoven layer is positioned closer to the waist edge, then it is easier to position, but it is further away from the core making it less effective as a barrier
Solution Approach 1:
The barrier is positioned in the transverse direction across the absorbent insert rather than being positioned longitudinally at the waist edge. This dimensional change allows the barrier to be placed directly over the absorbent core where it is most needed, improving effectiveness while maintaining ease of positioning through the transverse orientation.
3Reliability
If multiple folds are applied at different positions and elasticizing is added, then a functional barrier is created, but process complexity increases significantly at high speeds
Solution Approach 1:
The barrier layers are pre-assembled and pre-positioned on the absorbent insert during the core formation process, before final product assembly. The liquid impermeable layer, liquid retarding layer, and breathable layer are integrated into the insert structure in advance, eliminating the need for complex post-assembly folding and elasticizing operations at high-speed production lines.
4Reliability
If a liquid impermeable film layer is used, then superior liquid exudate protection is provided, but breathability may be compromised
Solution Approach 1:
The barrier structure assigns different functional properties to different layers: the liquid impermeable layer provides localized liquid blocking where needed, the liquid retarding layer slows liquid movement, and the breathable layer restores vapor transmission. This local differentiation of material properties allows simultaneous achievement of liquid protection and breathability without compromising either function.
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 solution provides superior leakage protection for liquid exudates with reduced waste and cost, maintaining breathability and comfort, while ensuring effective attachment and anchoring of the barrier layers.
Implementation Method 1
a liquid impermeable film layer
Implementation Method 2
breathable design
Data Source
AI summary
The present disclosure pertains to an absorbent article (1) for personal hygiene, preferably a disposable pant, comprising:—a substantially transversely extending front panel (2);—a substantially transversely extending back panel (3); and—a substantially longitudinally extending absorbent insert (4) joined to each of said front and back panels (2, 3), said absorbent insert (4) comprising front and back transversal edges and left and right longitudinal edges connecting the front and back transversal edges to form a perimeter thereof; wherein the front and back panels (2, 3) are joined together to define a pair of side seams, and characterised in that said article comprises a transversal waist barrier (5) proximal to the front and/or back transversal edges of the absorbent insert (4) wherein said barrier (5) comprises a plurality of liquid retarding layers and in that said barrier is in the form of a patch and from about 50% to about 75% of a perimeter thereof is joined to said insert (4) and/or panels (2, 3) such that an un-joined portion of said perimeter forms an opening to a containment pocket.