Moisture-Blocking Mounting Base Material With Flexible Hygroscopic Layers
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Solution Overview
Problem
Existing hygroscopic sheets fail to maintain organic electronic devices in a dry state due to desiccant saturation and moisture release, and lack flexibility to withstand installation stresses.
Innovation Solution
A base material comprising a metal foil with a protective resin layer on one side and a hygroscopic resin layer on the other, incorporating a desiccant that chemically captures moisture, with additional layers for insulation and adhesion, providing a moisture barrier and flexibility.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a hygroscopic sheet with a desiccant layer is used for moisture absorption, then moisture prevention is improved, but the desiccant reaches saturation quickly and releases moisture back into the device
Solution Approach 1:
The base material is divided into multiple functional layers: a metal foil layer for primary moisture blocking, a protective resin layer for durability, and a hygroscopic resin layer with desiccant for moisture absorption. This segmentation allows each layer to perform its specific function optimally, preventing desiccant saturation issues
Solution Approach 2:
The invention uses a composite structure combining metal foil (aluminum), protective resin, and hygroscopic resin with dispersed desiccant particles. This composite material approach creates a multi-functional base material that blocks moisture physically while also absorbing any penetrations, ensuring long-term moisture prevention without desiccant saturation
2Ease of operation
If a plastic base material is used for sealing, then flexibility is improved, but moisture barrier properties deteriorate under bending stress
Solution Approach 1:
The invention uses a thin metal foil layer (5-20 μm) that provides excellent moisture blocking while maintaining flexibility. The foil can withstand bending stresses during installation without compromising its moisture barrier function, unlike thicker plastic materials
Solution Approach 2:
By combining metal foil with protective and hygroscopic resin layers, the invention creates a composite base material that maintains both flexibility for installation and superior moisture barrier properties even under bending stress
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 base material effectively blocks moisture ingress, maintains device dryness, and retains flexibility even under stress, ensuring long-term moisture protection and ease of handling.
Implementation Method 1
the metal foil blocks permeation of most of moisture
Implementation Method 2
a hygroscopic resin layer in which a desiccant is dispersed
Implementation Method 3
the desiccant is an agent of a type that chemically captures moisture by reaction with water
Implementation Method 4
adjacent two of the metal foil, the protective resin layer, the hygroscopic resin layer, and the inner surface resin layer are bonded to each other with a dry laminate adhesive
Data Source
Figure 1~3
Figure 4~6
AI summary
A base material for mounting an electronic device, the base material including a metal foil and a protective resin layer, in which the protective resin layer is provided on a surface of the metal foil on one side, a surface of the metal foil on the other side is a surface on a side on which the electronic device is mounted, and a hygroscopic resin layer is provided on the surface of the metal foil on the other side.