Single-Layer Adsorption Sheet for Uniform High Adsorbent Loading
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Solution Overview
Problem
Conventional ethylene gas adsorption sheets have limited adsorption capacity due to non-uniform distribution of adsorbents, especially when large amounts are supported, leading to detachment and reduced performance.
Innovation Solution
An adsorption sheet composed of a single layer of an adsorptive composition containing specific ratios of melt-resistant fibers with varying beating degrees and a binder, which supports a high amount of adsorbent uniformly, using a wet papermaking process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a multilayer structure with a barrier layer is used to prevent liquid penetration, then liquid barrier performance is improved, but the sheet becomes rigid and cannot conform to the contour of the breast
Solution Approach 1:
The sheet is divided into multiple functional layers (first liquid-absorbing layer, first barrier layer, second barrier layer, second liquid-absorbing layer) with different properties. Each layer performs a specific function, and their combination achieves both liquid barrier performance and flexibility through the cumulative effect of thin, flexible individual layers rather than a single thick rigid barrier.
Solution Approach 2:
The barrier layers are designed as thin film structures that provide liquid barrier functionality while maintaining flexibility. The thin film configuration allows the sheet to conform to breast contours while still preventing liquid penetration, resolving the contradiction between barrier performance and flexibility.
2Reliability
If liquid-absorbing sheets are disposed of after use, then hygiene is maintained, but resource waste occurs and environmental burden increases
Solution Approach 1:
The sheet is designed to be disassembled into separable components after use. The liquid-absorbing layers can be removed and discarded after absorbing secretions, while the barrier layers are retained and reused for subsequent periods. This selective discarding and recovering approach maintains hygiene by removing contaminated absorbent material while preventing resource waste by reusing the durable barrier structure.
Solution Approach 2:
The barrier layers are pre-installed and designed for long-term reuse before the liquid-absorbing layers are depleted. This preliminary preparation of reusable components allows for efficient replacement of only the consumable absorbent portions, reducing overall waste while maintaining continuous hygiene protection.
3Loss of substance
If liquid-absorbing sheets are reused for multiple periods, then resource waste is reduced, but liquid barrier performance deteriorates due to saturation
Solution Approach 1:
The sheet structure separates reusable barrier functions from consumable absorbing functions. The barrier layers can be reused across multiple periods while the liquid-absorbing layers are replaced periodically. This segmentation allows the barrier performance to be maintained long-term while managing the saturation of absorbent materials through selective replacement.
Solution Approach 2:
Instead of replacing the entire sheet after single use, only the liquid-absorbing layers are replaced periodically (partial replacement). The barrier layers continue to serve beyond their initial design life, providing excessive durability that reduces resource waste while maintaining liquid barrier performance through the replacement of saturated absorbent components.
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 ensures uniform adsorbent support, enhancing adsorption capacity and maintaining sheet integrity even with increased adsorbent load, effectively adsorbing gases like ethylene, especially when generated in large amounts.
Implementation Method 1
a liquid permeable barrier layer comprising a plurality of microfibers
Implementation Method 2
a liquid absorbing layer comprising a three-dimensional network formed by intertwining a plurality of rods
Data Source
AI summary
An adsorption sheet obtained by forming a single layer of an adsorptive composition, the adsorptive composition containing, out of a total solid content of 100% by mass, 20 to 80% by mass of an adsorbent, 12 to 75% by mass of a melt-resistant fiber with a high beating degree which is composed of a fiber that has a beating degree of 50 to 500 CSF and does not melt at a temperature of 150°C, and 2 to 12% by mass of a binder.