Absorbent Article Fastening With an Integrated Outer-Cover Landing Zone
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Solution Overview
Problem
Existing disposable absorbent articles, such as diapers, face challenges in achieving effective fastening while minimizing delamination and environmental impact, often requiring high material usage and increased cost due to complex fastening systems.
Innovation Solution
A disposable absorbent article design featuring a fastening system with a combination of adhesive and mechanical fastening elements, utilizing an outer cover with high-fiber-density and low-fiber-density areas in a specific pattern, and a breathable backsheet with reduced basis weight, to enhance fastening force and reduce delamination risk.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a dedicated landing zone layer is added to the backsheet to improve fastening, then fastening effectiveness is improved, but material usage and cost increase
Solution Approach 1:
The patent combines the landing zone function with the outer cover layer by integrating adhesive regions directly into the outer cover's bonding pattern, eliminating the need for a separate dedicated landing zone layer. This merging of functions reduces material usage while maintaining fastening effectiveness.
Solution Approach 2:
The outer cover layer is designed to serve multiple functions: it provides the bonding pattern for fastening (landing zone function), maintains structural integrity, and reduces overall material usage. By making the outer cover multi-functional, the patent eliminates the need for additional dedicated layers.
2Force
If adhesive regions occupy large area in bonding pattern to improve fastening, then fastening force is improved, but delamination risk increases
Solution Approach 1:
The patent applies adhesive regions locally within specific pattern elements of the bonding pattern rather than uniformly across the entire outer cover. This localized adhesive application provides sufficient fastening force at critical points while reducing overall adhesive content and delamination risk in non-critical areas.
Solution Approach 2:
The patent uses adhesive regions that occupy a defined but limited area proportion within pattern elements, rather than covering the entire surface. This partial action provides adequate fastening force while avoiding excessive adhesive application that would increase delamination risk.
3Reliability
If outer cover basis weight is increased to improve fastening, then fastening effectiveness is improved, but environmental impact and cost increase
Solution Approach 1:
The patent changes the structural parameters of the outer cover by implementing a specific bonding pattern with defined adhesive region proportions, rather than relying on increased basis weight. This parameter change allows effective fastening with reduced material quantity, lowering environmental impact and cost.
Solution Approach 2:
The patent creates a composite structure within the outer cover by combining bonded and unbonded regions in a specific pattern, achieving effective fastening through structural composition rather than material quantity. This composite approach reduces overall material usage while maintaining performance.
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 improved fastening performance with reduced material usage and cost, while minimizing delamination and environmental impact, offering a more sustainable and cost-effective diaper design.
Implementation Method 1
the one or more male fasteners comprise one or more first areas of adhesive A1
Implementation Method 2
one or more second areas of mechanical fastening elements A2
Data Source
AI summary
A disposable absorbent article comprising: a liquid permeable topsheet; a liquid impermeable backsheet; and an absorbent core comprising absorbent material therein and being sandwiched between said topsheet and backsheet; the topsheet, backsheet and absorbent core together forming a chassis of said article, wherein said chassis comprises a perimeter formed by first and second transverse edges and first and second longitudinal edges connecting the first and second transverse edges; a longitudinal centerline (y) extending substantially parallel to said first and second longitudinal edges and interposed therebetween such to divide said chassis into a first longitudinal half between said longitudinal centerline (y) and said first longitudinal edge and a second longitudinal half between said longitudinal centerline (y) and said second longitudinal edge; and a transverse centerline (x) extending substantially parallel to said first and second transverse edges and interposed therebetween such to divide said chassis into a first transverse half between said transverse centerline (x) and said first transverse edge and a second transverse half between said transverse centerline (x) and said second transverse edge; wherein said article further comprises an outer cover positioned on a garment-facing side of said backsheet and covering at least 75% of an area defined by said perimeter of said chassis; and a fastening system consisting of one or more male fasteners and a female fastening material; and wherein the female fastening material comprises a landing zone arranged to receive said one or more male fasteners thereon to provide a fastening of said one or more male fasteners to said female fastening material, wherein said female fastening material comprises, preferably consists of, said outer cover; wherein the one or more male fasteners comprise one or more first areas of adhesive A1 and one or more second areas of mechanical fastening elements A2 and wherein the total area ratio ΣA1/ΣA2 is from about 0.4 to about 1 and wherein the outer cover may be an embossed nonwoven and the outer cover comprising high-fiber-density areas and low-fiber-density areas, wherein the low-fiber-density areas are at least substantially enclosed by high-fiber-density areas, and wherein the high-fiber-density areas are disposed in a repeated pattern.