Frangible Pathways in Absorbent Article Bond Regions
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Solution Overview
Problem
Existing absorbent articles, such as diaper pants, are difficult to remove and dispose of hygienically, especially when soiled, as they often require sliding down the legs or tearing bonded seams, leading to potential mess and loss of control.
Innovation Solution
The development of pant-style absorbent articles with frangible pathways and accessibility openings, allowing for easy tearing along fully formed cut lines, facilitating removal and disposal without sliding or tearing bonded seams.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If pant-style absorbent articles with bonded seams are used, then the article provides a closed, secure fit for the wearer, but the bonded seams become difficult to tear open for hygienic disposal
Solution Approach 1:
The bonded seam is segmented into a frangible pathway comprising multiple discrete bond regions spaced along the seam. Each bond region is intentionally weakened to create a line of weakness, allowing the seam to be easily torn open by applying force at accessible openings between the bond regions. This segmentation resolves the contradiction by maintaining overall seam integrity during wear while enabling easy separation for disposal.
Solution Approach 2:
The bond regions are pre-formed during manufacturing with controlled bonding characteristics that create inherent lines of weakness. Accessibility openings are also pre-formed between the bond regions to provide starting points for tearing. This preliminary preparation eliminates the need for difficult manual tearing during disposal, as the seam is designed to fail easily at predetermined locations.
2Ease of operation
If knife rolls are used to create openings in the belt, then the cutting system can form openings, but the openings are not fully formed cut lines and create bonded regions that increase difficulty for users to insert fingers and initiate tearing
Solution Approach 1:
Rather than attempting to create a single continuous cut line, the opening is segmented into discrete sections separated by bond regions. The accessibility opening provides sufficient space for finger insertion, while the bond regions between openings serve as predetermined tear initiation points. This segmented approach resolves the contradiction by prioritizing user accessibility over continuous cut line formation.
Solution Approach 2:
Instead of creating fully formed cut lines that would prevent finger insertion, the design inverts the approach by creating bonded regions that facilitate tearing. The bond regions act as intentional weak points that guide the tearing process, while the openings between them provide the necessary accessibility for users to initiate the tearing action.
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 absorbent articles in a manner similar to traditional open diaper forms, maintaining hygiene and control, while providing a convenient and efficient process.
Implementation Method 1
forming a bond region in the substrate, the bond region comprising material of the substrate fused together
Implementation Method 2
forming a bond region in the substrate, the bond region comprising material of the substrate fused together
Implementation Method 3
forming a frangible pathway in the substrate extending between the bond region and the first edge of the substrate
Implementation Method 4
breaking the bond region to form a slit through the substrate between the leading edge region and the trailing edge region by displacing the bond region in a Z-direction
Data Source
AI summary
The present disclosure relates to methods and apparatuses for making absorbent articles having front and/or back waist regions including one or more frangible pathways and at least one line accessibility opening. Methods and apparatuses may be configured to displace portions of substrates when making absorbent articles to break bond regions.