Frangible Pathways in Elastic Belts for Hygienic Absorbent Article Removal
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Solution Overview
Problem
Existing pant-style disposable absorbent articles are unhygienic and inconvenient for removal and disposal, especially when soiled, as they often require sliding down the legs or tearing bonded seams, leading to potential fecal smearing and loss of control.
Innovation Solution
The development of absorbent articles with frangible pathways in the elastic belts, featuring lines of weakness that resist opening while worn, allowing for easy removal and disposal by tearing along designated pathways.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If pant-style disposable absorbent articles are used, then convenience of application and removal while standing is improved, but hygiene during removal and disposal deteriorates due to fecal smearing and loss of control
Solution Approach 1:
The elastic belts are segmented into discrete bonded regions and frangible pathways with lines of weakness. This segmentation allows the belt to be torn along predetermined lines for hygienic removal while maintaining structural integrity in bonded regions during normal wear.
Solution Approach 2:
Lines of weakness are pre-defined in the elastic belts during manufacturing, creating predetermined tear paths. This preliminary action ensures that when removal is needed, the belt can be easily torn along these pre-defined lines without uncontrolled tearing or fecal smearing.
2Ease of operation
If tear lines with perforations are added to enable easy removal, then ease of operation is improved, but reliability deteriorates as perforations may open unintentionally while worn or give impression of weakness
Solution Approach 1:
The elastic belt has different structural qualities in different regions: bonded regions provide strength and integrity during wear, while frangible pathways with lines of weakness provide easy tearability when needed. This local differentiation resolves the contradiction between reliability during wear and ease of removal.
Solution Approach 2:
The bond strength parameter is varied across the elastic belt - strong bonds in regions requiring integrity during wear, and weak bonds (lines of weakness) in regions intended for tearing. This parameter change allows the same component to exhibit different mechanical properties in different locations.
3Ease of operation
If elastic strands are cut at tear line locations, then ease of removal is improved, but manufacturing precision deteriorates due to challenges in ensuring consistent cutting of all strands
Solution Approach 1:
Elastic strands are pre-cut or pre-weakened at specific locations during manufacturing to create lines of weakness. This preliminary action ensures that when tearing is initiated, the tear will propagate consistently along these pre-defined paths without requiring precise real-time cutting of multiple strands.
Solution Approach 2:
Lines of weakness act as intermediaries between the bonded regions and the tear propagation path. These lines provide a controlled path for tear propagation, mediating the transition from strong bonded regions to separated regions without requiring precise cutting of all elastic strands.
4Ease of operation
If discrete bonds define lines of weakness in elastic belts, then ease of removal is improved, but device complexity increases due to additional bonding regions and frangible pathways
Solution Approach 1:
The elastic belt serves multiple functions: it provides elasticity and containment during wear through bonded regions, and enables easy hygienic removal through frangible pathways with lines of weakness. This multi-functionality resolves the contradiction between operational ease and structural complexity.
Solution Approach 2:
The elastic belt is divided into discrete bonded regions and frangible pathways, allowing each segment to perform its specific function. This segmentation enables the belt to be simple in construction while providing complex functionality through the combination of different regional properties.
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
Enables caregivers to remove and dispose of soiled products hygienically and conveniently, similar to traditional open diaper forms, while maintaining the convenience of a pant-style design.
Implementation Method 1
a frangible pathway in the first belt extending between a proximal terminus on the inner edge and a distal terminus on the outer edge of the first belt, the first frangible pathway comprising a first tear zone extending for a first length LTZ1 between the accessibility opening and one of the distal terminus and the proximal terminus; and wherein the first tear zone comprises a first line of weakness extending for a first length LLW1
Data Source
AI summary
The present disclosure relates to absorbent articles including a first belt and a second belt, the first belt and/or the second belt comprising one or more frangible pathways. The frangible pathway may comprise a first tear zone extending from an accessibility opening to a distal terminus, and a second tear zone extending from the accessibility opening to a proximal terminus.