Absorbent Article Waist Panel Pocket Assembly Against Air-Induced Separation
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Solution Overview
Problem
The assembly of absorbent articles with waistbands having unattached edges poses challenges due to air being forced into the pocket, causing the waistband to lift and deform, leading to separation or tearing from the topsheet, especially at high production rates.
Innovation Solution
A method involving a first carrier substrate with an elastic part bonded to it, a slit cut into the substrate, and a second carrier substrate sandwiching the elastic part, with a region of the elastic part unattached to define a pocket, creating a waist panel bonded to the topsheet and backsheet with an opening defined by the slit.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a waistband with unattached edges is used to form a pocket, then the pocket can contain bodily exudates and prevent leaks, but air may be forced into the pocket causing the waistband to lift, deform, and separate from the topsheet
Solution Approach 1:
A reinforcement element is applied to the waistband prior to the bonding operation to prevent air from forcing the waistband away from the topsheet during assembly. This preliminary protective measure ensures the waistband remains stable during the bonding process while still allowing the unattached edge to form the functional pocket.
Solution Approach 2:
A reinforcement element acts as an intermediary between the waistband and the topsheet during the bonding process. This intermediate component prevents direct air interference with the waistband-topsoet interface, allowing the pocket to form correctly while maintaining bonding stability.
2Ease of manufacture
If the unattached edge of the waistband advances through assembly operations, then the pocket is formed, but frictional forces may drag or pull on the unattached edge causing permanent deformation or removal of the waistband
Solution Approach 1:
The reinforcement element is applied beforehand to protect the unattached edge of the waistband during assembly operations. This preliminary protection prevents frictional forces from causing deformation or removal of the waistband edge while still allowing the pocket to form.
Solution Approach 2:
The reinforcement element provides beforehand cushioning or protection to the vulnerable unattached edge of the waistband. This protective layer cushions the edge against frictional forces during assembly, preventing permanent deformation while maintaining the pocket's structural integrity.
3Ease of manufacture
If the waistband is bonded to the topsheet with adhesive, then the waistband is secured, but air may be forced into the pocket causing separation before bonding can complete
Solution Approach 1:
The reinforcement element is applied before the bonding operation to prevent air from forcing the waistband away from the topsheet during the bonding process. This ensures the bonding can complete reliably without interruption from waistband lifting or deformation.
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 method helps prevent separation of the waist panel from other absorbent article components during assembly, maintaining the integrity of the waistband and reducing deformation, thus enhancing production efficiency.
Implementation Method 1
an elastic part comprising a first surface and an opposing second surface, the elastic part further comprising a first longitudinal edge and a second longitudinal edge separated from the first longitudinal edge in a cross direction
Data Source
AI summary
The present disclosure relates to absorbent articles with a waist panel and a pocket positioned between a topsheet and a backsheet. The waist panel is bonded with a garment facing surface of the topsheet. A first region of a second surface the waist panel is bonded with a wearer facing surface of the backsheet, and a second region is unattached to the backsheet to define a pocket between the second region and the backsheet. The pocket comprises an opening defined by a slit in the topsheet. In an assembly method, a slit is cut into a first carrier substrate. An elastic part is sandwiched between the first carrier substrate and a second carrier substrate. A first region of the elastic part is bonded with the second carrier substrate, and a second region remains unattached to the second carrier substrate to define a pocket with an opening defined by the slit.