Multi-Component Absorbent Article Topsheet Bonding Zones
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Solution Overview
Problem
Absorbent articles face challenges in achieving efficient fluid management and skin gentleness while maintaining a one-piece appearance and minimizing costs, as traditional topsheets can lead to prolonged fluid residency and skin wetness, and multi-component topsheets may compromise skin gentleness and product perception.
Innovation Solution
A multi-component topsheet design featuring a first discrete substrate forming about 80% of the outer perimeter, with a second discrete substrate joined to it, and a third discrete substrate, where the second substrate is disposed intermediate to the first and third substrates, bonded in specific zones, and leg cuffs with free terminal edges positioned to align with these bonding zones, ensuring efficient fluid distribution and absorption without compromising skin gentleness or product aesthetics.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If three-dimensional substrates are used for topsheets to reduce fluid residency and improve skin comfort, then fluid management performance is improved, but material cost increases
Solution Approach 1:
The patent applies local quality by using three-dimensional substrates only in specific high-performance zones (center topsheet and leg cuffs) rather than throughout the entire absorbent article. This localized application provides enhanced fluid management where most needed while reducing overall material costs compared to using premium substrates everywhere.
2Reliability
If multiple-piece topsheets are used to improve fluid handling efficiency, then fluid management is improved, but product perception and aesthetic appearance deteriorate due to visible bonding areas
Solution Approach 1:
The patent extracts the bonding elements from visible areas by positioning all bonding zones (between center topsheet and lateral topsheets, and between leg cuffs and chassis) in non-visible regions. This allows multiple-piece construction for improved fluid handling while maintaining a seamless one-piece appearance from the wearer's perspective.
Solution Approach 2:
The patent resolves the appearance conflict by moving bonding operations to the third dimension - underneath the visible surface of the absorbent article. Bonding areas are positioned in the vertical dimension below the top surface, eliminating visual disruption while preserving the structural benefits of multi-piece construction.
3Shape
If bonding zones are positioned to maintain one-piece appearance, then aesthetic appearance is improved, but fluid distribution may be compromised if bonding areas interrupt fluid flow paths
Solution Approach 1:
The patent introduces an intermediary acquisition layer positioned between the topsheet and absorbent core that acts as a mediator to redirect fluid flow around bonding zones. This acquisition layer ensures continuous fluid distribution paths are maintained even where bonding areas are present, preventing interruption of fluid flow while allowing bonding zones to be positioned for optimal appearance.
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 effectively reduces fluid residency on the skin, enhancing dryness and comfort, while maintaining a seamless appearance and reducing costs by optimizing the use of advanced substrates, thereby improving the overall performance and user experience of absorbent articles.
Implementation Method 1
an absorbent core disposed between the topsheet and the backsheet... configured to receive the fluids being excreted from the body and aid in directing the fluids toward an acquisition system, a distribution system, and/or the absorbent core
Implementation Method 2
three-dimensional substrates that further reduce skin/fluid contact and/or skin/fluid contact time during, for example, a urination event
Implementation Method 3
the first discrete substrate and the second discrete substrate are bonded in a first bonding zone about a longitudinal axis of the topsheet, and the third discrete substrate and the second discrete substrate are bonded in a second bonding zone
Data Source
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AI summary
An absorbent article having a topsheet (24) comprises a second substrate (620) disposed at least partially intermediate a first discrete substrate (610) and a third discrete substrate (630) wherein the first discrete substrate (610) opposing the third discrete substrate (630) about a longitudinal axis (80) of the topsheet (24), and wherein the first discrete substrate (610) and the second discrete substrate (620) are bonded in a first bonding zone (619) about a longitudinal axis (80) of the topsheet (24), and the third discrete substrate (630) and the second discrete substrate (620) are bonded in a second bonding zone (629) about a longitudinal axis (80) of the topsheet (24); and a pair of leg cuffs (3401, 3402) having free terminal edges and being joined to the topsheet (24) and/or backsheet (25), wherein the distance between the free terminal edges is not longer than the distance between an inner edge of the first bonding zone (619) and an inner edge of the second bonding zone (629).