Cellulose-Free Absorbent Core with Elastic Side Panels
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Solution Overview
Problem
Existing absorbent articles, such as diapers, face challenges in maintaining immobilization of absorbent particulate polymer material in both dry and wet states while maintaining flexibility and cost-effectiveness, with existing solutions either increasing bulk or reducing effectiveness in wet states.
Innovation Solution
A disposable absorbent article with a cellulose-free absorbent core and elastically extensible side panels, where the absorbent core is immobilized using a thermoplastic composition, ensuring effective retention of liquid exudates and flexibility.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If absorbent particulate polymer material is immobilized using conventional technologies, then immobilization effectiveness is improved, but article bulk and thickness increase
Solution Approach 1:
The patent uses a thin film chassis structure to immobilize the absorbent particulate polymer material. The chassis comprises a topsheet, backsheet, and side panels that form a confined space to hold the SAP in place without requiring thick immobilizing layers, thus maintaining thinness and flexibility while achieving effective immobilization.
Solution Approach 2:
The side panels include elastically extensible zones positioned at specific locations (leg regions) to provide localized fit and containment. This allows the chassis to adapt to body contours and maintain immobilization effectiveness without uniformly increasing bulk across the entire article.
2Reliability
If absorbent particulate polymer material is immobilized using conventional technologies, then immobilization effectiveness is improved, but flexibility is reduced
Solution Approach 1:
The chassis is constructed from flexible materials including elastomeric side panels and breathable film portions that allow the article to bend and conform to body movements. This maintains flexibility and comfort while the overall chassis structure provides sufficient containment for immobilization.
Solution Approach 2:
The side panels incorporate elastically extensible zones that can dynamically adjust to body movements and stretching. The elastic zones allow the chassis to expand and contract with leg movements, maintaining both immobilization effectiveness and flexibility throughout the wear period.
3Reliability
If absorbent particulate polymer material is immobilized using conventional technologies, then immobilization effectiveness is improved, but manufacturing cost increases
Solution Approach 1:
The patent specifies that the chassis should comprise breathable film portions with specific permeability characteristics. By optimizing the film permeability parameters and using cost-effective breathable film materials, the patent achieves effective immobilization and comfort without requiring expensive materials or complex manufacturing processes.
4Ease of operation
If cellulose-free absorbent core is used, then softness and flexibility are improved, but liquid retention effectiveness may be reduced
Solution Approach 1:
The absorbent core uses a composite structure combining superabsorbent polymer particles with a breathable film matrix. This composite material provides the softness and flexibility of synthetic materials while the SAP components maintain high liquid absorption and retention effectiveness, achieving both comfort and performance.
Solution Approach 2:
The elastically extensible zones in the side panels provide localized adaptation to body contours, enhancing comfort and fit in critical areas while the overall chassis structure maintains liquid containment effectiveness. The localized elasticity allows better conformity without compromising the barrier function.
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 solution provides improved softness, flexibility, and conformity to the body while maintaining effective immobilization of absorbent material in both dry and wet states, reducing the likelihood of leakage and enhancing comfort.
Implementation Method 1
The absorbent core is immobilized using a thermoplastic composition, ensuring effective retention of liquid exudates and flexibility.
Implementation Method 2
Absorbent particulate polymer material absorbs liquid and swells
Implementation Method 3
each side panel having at least one zone elastically extensible in a direction having a vector component in the lateral direction
Data Source
Figure 1
Figure 2
Figure 3~4
AI summary
A disposable absorbent article includes an absorbent core that is substantially cellulose free and a chassis that includes a topsheet and a backsheet, with the absorbent core located between the topsheet and the backsheet. The chassis may include a pair of side panels joined with the chassis, the side panels extending laterally outwardly beyond the longitudinal edges, each side panel having at least one zone extensible in a direction having a vector component in the lateral direction.