Silicone Adhesive Film for Optical Panels
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Solution Overview
Problem
Existing adhesive protective films for optical display panels, such as acrylate or urethane acrylate-based films, exhibit high peel strength over time, leading to damage and deformation when removed, and have unstable physical properties under harsh conditions, which is detrimental for thinner and more flexible displays.
Innovation Solution
A silicone-based adhesive protective film composed of a mixture of silicone resins, a crosslinking agent, and a curing catalyst, with specific formulations and ratios, that maintains low peel strength, minimal change in peel strength over time, and low dissolution rate, ensuring minimal damage and deformation upon removal and improved storage stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If acrylate or urethane acrylate-based adhesive protective films are used, then initial adhesion is achieved, but peel strength significantly increases over time causing damage and deformation upon removal
Solution Approach 1:
The patent changes the chemical composition parameters of the adhesive by using silicone resin instead of acrylate or urethane acrylate, and by controlling the molecular weight distribution and functional group ratios of the silicone resin to maintain stable peel strength over time
Solution Approach 2:
The patent uses a composite adhesive system comprising silicone resin combined with specific additives and modifiers to achieve both low initial peel strength and minimal increase over time, creating a multi-component formulation that balances adhesion and release properties
2Duration of action of stationary object
If adhesive protective films are attached for long-term storage, then protection is provided, but physical properties change and cause deterioration in processability
Solution Approach 1:
The patent optimizes the molecular weight distribution and functional group composition of the silicone resin to ensure minimal physical property changes during long-term storage at elevated temperatures and humidity
Solution Approach 2:
The patent designs the adhesive protective film as a temporary protective solution that maintains its properties throughout the manufacturing and assembly process, then easily releases without damage, effectively serving its purpose for the required duration only
3Strength
If peel strength is reduced for easy removal, then damage risk decreases, but adhesion protection capability may be compromised
Solution Approach 1:
The patent carefully adjusts the functional group ratios and molecular weight parameters of the silicone resin to achieve the optimal balance between adhesion strength for protection and low peel strength for easy removal without damage
Solution Approach 2:
The patent creates different adhesive characteristics at the interface with the display panel versus the release film, achieving strong protection at the panel interface while maintaining easy release at the film interface through selective adhesion properties
Data Source
AI summary
A silicone-based adhesive protective film and an optical member including the same are provided. A silicone-based adhesive protective film is formed of a composition including a silicone resin, a crosslinking agent, and a curing catalyst, and the silicone-based adhesive protective film has a peel strength of about 3 gf/inch or less with respect to a glass plate at 25° C., and a modulus of about 0.5 MPa to about 7 MPa at 25° C.