Absorbent Article Barrier Composition for Leakage Control
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Solution Overview
Problem
Current absorbent articles experience side leakage due to deformation and void spaces between the topsheet and backsheet layers, leading to discomfort and inefficiency in containing body exudates.
Innovation Solution
An absorbent article with a barrier composition comprising a polymeric layer and an adhesive layer, positioned between the topsheet and backsheet layers, which fills void spaces and reduces leakage by forming a sealed peripheral region, using a hydrophilic polymeric layer and hydrophobic adhesive layer, and optionally including polyvinyl alcohol, polyvinyl pyrrolidone, and sodium tetraborate decahydrate.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If elastic structures are added to form barriers and walls to prevent side leakage, then leakage resistance is improved, but device complexity and wearer comfort deteriorate
Solution Approach 1:
The invention extracts the barrier function from complex elastic structures and relocates it to the adhesive layer bonding the topsheet and backsheet. By removing unnecessary elastic components and concentrating the sealing function in the adhesive layer, the design achieves leakage prevention with simpler structure and improved comfort.
Solution Approach 2:
The adhesive layer is designed with controlled porosity to allow it to bond the topsheet and backsheet while accommodating slight movements and deformations. This porous structure provides effective sealing without requiring rigid, complex barrier structures, thus maintaining simplicity and comfort.
2Reliability
If tall barriers are positioned on the topsheet layer to prevent body exudate movement, then leakage resistance is improved, but wearer comfort deteriorates due to folding and obstruction
Solution Approach 1:
The invention removes the barrier structures from the topsheet layer entirely and integrates the sealing function into the adhesive layer at the periphery. This extraction eliminates the comfort issues caused by tall barriers while maintaining leakage prevention through proper adhesive bonding at the critical seal regions.
Solution Approach 2:
Instead of using vertical barriers on the topsheet surface, the invention moves the sealing function to the peripheral adhesive layer, utilizing the bonding interface between topsheet and backsheet. This dimensional shift from surface-level barriers to interface-level sealing eliminates comfort problems while maintaining effectiveness.
3Adaptability or versatility
If the absorbent article is made to accommodate deformation during movement, then adaptability is improved, but leakage resistance deteriorates due to increased void spaces
Solution Approach 1:
The adhesive layer is designed with appropriate porosity and bonding characteristics that allow it to maintain effective sealing during deformation. The porous structure accommodates movement and shape changes while preventing void space formation that would lead to leakage, thus achieving both adaptability and leakage resistance.
Solution Approach 2:
The invention optimizes the adhesive layer parameters (bond strength, porosity, thickness) to balance deformation accommodation and leakage prevention. By adjusting these parameters, the adhesive layer can flex with the article during movement while maintaining sufficient bonding to prevent exudate leakage through void spaces.
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 barrier composition effectively reduces side leakage by minimizing void spaces and maintaining comfort, as it is non-swelling and non-fugitive, enhancing the absorbent article's ability to contain body exudates without increasing thickness or discomfort.
Implementation Method 1
the polymeric layer is hydrophilic and the adhesive layer is hydrophobic
Implementation Method 2
a barrier composition positioned between the topsheet layer and the backsheet layer, the barrier composition forming a portion of the sealed peripheral region, the barrier composition comprising a polymeric layer and an adhesive layer
Data Source
AI summary
An absorbent article which can have a reduction in the incidence of side leakage of body exudates from the absorbent article. The absorbent article can have a topsheet layer, a backsheet layer, an absorbent core positioned between the topsheet layer and the backsheet layer, and a barrier composition positioned between the topsheet layer and the backsheet layer and bonding the topsheet layer to the backsheet layer.