Waist Gasketing Element Elastic Segmentation for Absorbent Articles
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Solution Overview
Problem
Conventional absorbent articles with elasticized waistbands face challenges in manufacturing, including exposure risks during handling and use due to the proximity of elastics to edges, which affects safety and performance, and require a balance between snug fit and manufacturing variability.
Innovation Solution
The design incorporates a waist gasketing element with a top and bottom layer bonded in a closure bond region, which includes elastic members, allowing for independent spacing of elastics and improved manufacturing flexibility, while maintaining a secure fit.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Shape
If elastics are placed close to the material edge to ensure better conformity to the wearer's body, then the fit quality is improved, but the risk of elastic exposure during handling or use increases
Solution Approach 1:
The waistband is divided into multiple segments including a front waistband portion, rear waistband portion, and leg portions. Each segment contains elastics that are laterally spaced apart, allowing the front and rear waistband elastics to be positioned closer to the waist edge for better fit while the leg portion elastics provide structural support and reduce exposure risk.
Solution Approach 2:
The patent introduces lateral spacing as an additional dimension for elastic placement. By spacing elastics laterally within the waistband structure and using multiple waistband portions, the design achieves both close-to-edge positioning for fit quality and sufficient spacing for reduced exposure risk.
2Reliability
If elastics are spaced farther apart to reduce exposure risk, then safety is improved, but the ability to conform to the wearer's body deteriorates
Solution Approach 1:
The waistband is segmented into front, rear, and leg portions with elastics distributed across these segments. This segmentation allows elastics to be positioned optimally in each segment - close to the edge in front and rear portions for fit, and spaced apart in the leg portion for safety.
Solution Approach 2:
Different regions of the waistband have different elastic spacing characteristics. The front and rear waistband portions have elastics positioned closer to the waist edge for better conformity, while the leg portions have elastics spaced laterally to reduce exposure risk. Each region is optimized for its specific function.
3Reliability
If a larger distance is provided between elastics to reduce exposure risk, then safety is improved, but manufacturing precision requirements increase due to cutting variability
Solution Approach 1:
The waistband is divided into multiple portions that can be manufactured and positioned as separate units. This segmentation reduces the impact of cutting variability on individual elastic placement, as each portion can be optimized independently and assembled into the final product.
Solution Approach 2:
The waistband portions are prepared with elastics positioned in advance during the manufacturing process, before final assembly. This preliminary positioning allows for controlled placement that compensates for subsequent cutting and assembly variability, ensuring elastics end up in the correct positions despite manufacturing tolerances.
4Reliability
If elastics are positioned close to the edge for better fit, then product performance is improved, but the complexity of the manufacturing process increases due to precision requirements
Solution Approach 1:
The manufacturing process is segmented into stages where waistband portions are prepared separately with elastics positioned in advance. This reduces the complexity of achieving precise elastic placement in the final assembly, as each portion can be manufactured with standard tolerances and then assembled.
Solution Approach 2:
Elastics are positioned in the waistband portions during preliminary manufacturing steps, before final assembly and cutting. This preliminary action simplifies the overall manufacturing process by establishing elastic positions early, reducing the need for high-precision operations in later stages.
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 solution enhances safety by reducing exposure risks, ensures consistent product performance, and allows for greater manufacturing variability, resulting in a cost-effective and efficient production process.
Implementation Method 1
The top layer is bonded to the bottom layer in a closure bond region
Data Source
AI summary
An absorbent article for wearing about the lower torso of a wearer includes a first waist region having a first waist edge, a second waist region having a second waist edge, and a crotch region disposed between the first and second waist regions. The article further includes a chassis having a topsheet, a backsheet, and an absorbent core disposed between the topsheet and backsheet. A waist gasketing element is joined to the chassis and disposed in one of the first waist region or the second waist region. The waist gasketing element has a top layer and a bottom layer, and first area, A1. The top layer is bonded to the bottom layer in a closure bond region by a closure bonding technique. The closure bond region has an aggregate closure bond area, BA, which is less than 60% of the first area, A1.