Getter Sheet for Permeate Removal in Organic Electronics
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Solution Overview
Problem
Existing methods for removing permeates from flat structures, particularly in organic electronic devices, are inefficient and can damage the structures due to adhesive bonding, and struggle to achieve very low moisture levels below one percent.
Innovation Solution
A method involving a permeate-absorbing flat structure with a getter material that comes into planar contact with the structure to be dried, without adhesive bonding, allowing for high drying efficiency and easy removal, using a getter-material-containing flat structure configured in alternating layers for intense contact and dual-sided permeate interception.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If adhesive bonding is used to bring flat structures into contact for drying, then drying efficiency is improved, but the flat structure is damaged due to adhesion
Solution Approach 1:
A release layer is introduced as an intermediary between the flat structure to be dried and the drying medium. This release layer prevents direct adhesive bonding while maintaining intimate contact for efficient permeate removal. The release layer acts as a mediator that allows the drying process to proceed without causing damage through adhesion.
2Quantity of substance
If conventional drying methods are used to remove permeates, then moisture content is reduced to a few percent, but very low moisture levels below one percent cannot be achieved
Solution Approach 1:
The drying process is segmented into multiple stages using a multilayer structure with different drying agents having different moisture absorption capacities. The first drying agent removes the majority of moisture, while subsequent layers with progressively lower equilibrium moisture contents remove residual moisture, enabling achievement of very low moisture levels below one percent.
Solution Approach 2:
The equilibrium moisture content parameter of the drying medium is changed progressively through the use of multiple drying agents with different hygroscopic properties. Each subsequent drying agent has a lower equilibrium moisture content than the previous one, enabling stepwise reduction of moisture to achieve very low final moisture levels.
3Speed
If tight contact is applied to force moisture out of plant parts, then drying speed is improved, but adhesion occurs causing damage upon removal
Solution Approach 1:
The release layer serves as a mediator that enables tight contact between the flat structure and drying medium for fast drying, while simultaneously preventing adhesion that would cause damage upon removal. The release layer maintains the necessary contact pressure for efficient moisture removal without creating harmful adhesive bonds.
4Duration of action of stationary object
If paper is used as drying medium for long-term storage, then moisture removal is achieved, but water diffuses back into plant parts reaching equilibrium moisture
Solution Approach 1:
The equilibrium moisture content parameter of the drying medium is fundamentally changed by using synthetic polymer-based drying agents with much lower equilibrium moisture contents compared to paper. This parameter change prevents moisture diffusion back into the flat structure during long-term storage, maintaining very low moisture levels.
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 achieves effective drying of flat structures to very low moisture levels without damaging them, ensuring the integrity of organic electronic devices by preventing chemical interactions and maintaining optical properties.
Implementation Method 1
a method for removing particularly small amounts of permeates from a flat structure... comprising the (direct or indirect) bringing into planar contact of the flat structure with a flat structure containing at least one getter material and capable of taking up at least one permeate
Implementation Method 2
during long-term storage, water also diffuses from the plant parts into the paper
Data Source
AI summary
The invention relates to a method for absorbing permeates from a sheet material I, as used, for example, in organic electronic structures, this method being easy to carry out. Such a method includes, according to the invention, directly or indirectly bringing sheet material I into planar contact with a sheet material II, which contains at least one getter material and is capable of absorbing at least one permeate from sheet material I, there being no adhesive connection between sheet material I and sheet material II.