Thin Sheet Glass Composite Desiccant Coating Storage
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Solution Overview
Problem
Thin glass films rolled up on rolls are prone to stress corrosion cracking due to tensile stress, leading to self-propagating microcracking, which existing stabilization methods fail to adequately address, especially during storage and handling.
Innovation Solution
A method involving coating one or both sides of the thin glass film with a fluid coating material containing a desiccant, which binds to form a solid polymeric layer, thereby reducing mechanical stress and preventing water absorption that contributes to stress corrosion cracking, using a desiccant to absorb water and prevent crack progression.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If thin glass film is rolled up on rolls for storage and handling, then ease of operation and storage is improved, but stress corrosion cracking occurs due to tensile stress leading to reduced reliability
Solution Approach 1:
A protective coating is applied to the thin glass film before rolling and storage to preemptively protect against stress corrosion cracking. The coating acts as a cushioning layer that reduces tensile stress on the glass surface during handling, preventing crack initiation and propagation before they can occur.
Solution Approach 2:
The thin glass film is combined with a protective coating material to form a composite structure. This composite provides both the mechanical properties of glass and the protective characteristics of the coating material, which resists stress corrosion and protects the glass surface during rolled-up storage and handling operations.
2Ease of operation
If thin glass film is kept under tension during storage, then ease of operation is improved, but crack propagation accelerates due to stress corrosion leading to reduced durability
Solution Approach 1:
The protective coating is applied beforehand to cushion the glass film against tensile stress during storage. This pre-protective measure allows the glass to be stored under tension without accelerated crack propagation, significantly extending the acceptable storage duration while maintaining ease of operation.
3Reliability
If water molecules interact with strained bonds at crack tips, then stress corrosion cracking progresses, but this is a natural chemical process that cannot be prevented without additional protective measures
Solution Approach 1:
A protective coating is applied to the thin glass film to form a composite structure that prevents water molecules from reaching and interacting with strained bonds at crack tips. This coating layer acts as a barrier, blocking the chemical interaction between water and glass that drives stress corrosion cracking, thereby improving reliability without significantly increasing complexity.
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 method significantly extends the storage time of thin glass films under tension by preventing stress corrosion cracking, maintaining the glass's integrity and reducing the risk of breakage during storage and handling.
Implementation Method 1
using a desiccant to absorb water and prevent crack progression
Implementation Method 2
coating one or both sides of the thin glass film with a fluid coating material containing a desiccant
Implementation Method 3
coating one or both sides of the thin glass film with a fluid coating material containing a desiccant, which binds to form a solid, preferably polymeric layer
Data Source
Figure 1~2
Figure 3a
Figure 3b~3c
AI summary
The invention relates to a method of storing a thin sheet glass film (10). According to the invention, the thin sheet glass film (10) is held at two sides, at least one side of the thin sheet glass film (10) is coated over its entire surface with a fluid coating material (20) comprising at least one drying agent, the coating material (20) sets to form a solid polymeric coating, and the coated thin sheet glass film (10) is rolled up for storage.