Metal-Salt Laminated Glass Interlayer for Moisture-Resistant Adhesion
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional laminated glass interlayer films face challenges in achieving both high moisture resistance and moderate adhesive force, with adhesive force variations due to water content changes and difficulties in adjusting adhesive strength using metal salts like potassium and magnesium.
Innovation Solution
The interlayer film contains a thermoplastic resin, specifically polyvinyl butyral, with controlled distribution of magnesium and potassium salts, ensuring a specific ratio of potassium to thermoplastic resin intensity through TOF-SIMS measurements, maintaining a balanced adhesive force and moisture resistance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Force
If alkali metal salt or alkaline earth metal salt is added to weaken adhesive force, then adhesive force between interlayer film and glass plate is reduced, but moisture resistance is lowered
Solution Approach 1:
The invention changes the chemical composition parameters by using specific metal salts (alkali metal, alkaline earth metal, or rare earth metal salts) at controlled concentrations (0.01-10 wt%) to adjust adhesive force while maintaining moisture resistance. The specific parameter changes involve selecting appropriate metal cations and controlling their content to achieve the desired balance between adhesive force and moisture resistance.
Solution Approach 2:
The invention creates a composite interlayer film material combining polyvinyl butyral resin with metal salts and plasticizers. This composite structure allows the metal salts to modify adhesive properties while the resin matrix maintains moisture resistance, achieving a synergistic effect that resolves the contradiction between reduced adhesive force and maintained moisture resistance.
2Force
If compound containing potassium and compound containing magnesium are used in combination to adjust adhesive force, then adhesive force modulation becomes difficult, but moisture resistance can be maintained
Solution Approach 1:
The invention simplifies the composition by limiting metal salt options to alkali metal, alkaline earth metal, or rare earth metal salts with specified concentrations (0.01-10 wt%). This parameter control approach makes adhesive force adjustment more predictable and easier to manage while maintaining moisture resistance, avoiding the complexity of combining multiple specific compounds like potassium and magnesium salts.
3Force
If interlayer film water content changes, then adhesive force to glass plate varies, but moisture resistance should be maintained
Solution Approach 1:
The invention introduces metal salts (0.01-10 wt%) as stabilizing agents that buffer the effect of water content changes on adhesive force. These metal salts modify the chemical environment in a way that maintains consistent adhesive properties even when water content varies, thereby improving compositional stability while allowing some water content flexibility.
Data Source
Figure 1~3
Figure 4
AI summary
There is provided an interlayer film for laminated glass which is high in moisture resistance and has a moderate adhesive force. In the interlayer film for laminated glass according to the present invention, when a process composed of sputtering and measurement by TOF-SIMS is performed n times and n Rations of Ion Intensity of Potassium/Ion Intensity of Thermoplastic Resin obtained from the first to n-th sputtering and measurement processes are collected to calculate an average value1 ≤ n ≤ 10 of 10 values of Ratio1 ≤ n ≤ 10 measured within a range of 1 ≤ n ≤ 10 and an average value1 ≤ n ≤ 150 of 150 values of Ratio1 ≤ n ≤ 150 measured within a range of 1 ≤ n ≤ 150, the average value1 ≤ n ≤ 10 is more than 1.1 times the average value1 ≤ n ≤ 150·