Protective Film Blocking Layer Prevents Adhesive Contamination
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Solution Overview
Problem
Existing protective films for display devices fail to prevent external contaminants from adhering to the panel protective film and often expose adhesive materials during transport, leading to contamination of transport means and potential damage to the panel.
Innovation Solution
A protective film configuration comprising a panel protective film with a first and second protective film, each with adhesive layers and a blocking layer that prevents adhesive material from contacting the panel and transport surfaces, ensuring the adhesive remains attached to the films during delamination and transport.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If adhesive layers are used to attach protective films to the panel, then the protective films can be securely attached during transport and processing, but the adhesive material may contact and contaminate the panel and transport surfaces
Solution Approach 1:
A release film is introduced as an intermediary layer between the adhesive layer and the panel/transport surfaces. The release film has a release coating that prevents adhesive material from contacting and contaminating the panel while maintaining secure attachment during transport and processing. The release film acts as a mediator that allows the adhesive to bond strongly to the protective film while preventing contact with the panel.
Solution Approach 2:
The protective film assembly is segmented into multiple functional layers: the protective film itself, the adhesive layer, and the release film with release coating. This segmentation allows each layer to perform its specific function - the adhesive provides attachment strength while the release film prevents contamination, resolving the contradiction between strong attachment and contamination prevention.
2Length of moving object
If the protective film is made thin to reduce device thickness, then the device can be more compact, but the protective film becomes more susceptible to damage and contamination
Solution Approach 1:
The protective film assembly uses a composite structure combining the thin protective film with the release film layer. This composite structure maintains the thin profile for device compactness while the release film provides additional protection and contamination prevention, enhancing the reliability of the overall protective system.
Data Source
AI summary
A protective film includes a panel protective film, a first protective film disposed on a surface of the panel protective film and covering the surface of the panel protective film, the first protective film having a surface and an opposite surface facing the panel protective film, and a second protective film disposed on an opposite surface of the panel protective film and covering the opposite surface of the panel protective film, the second protective film having a surface facing the panel protective film and an opposite surface opposed to the surface of the second protective film, wherein the first protective film includes a first film layer, a first adhesive layer disposed on the opposite surface of the first film layer, and a blocking layer disposed on an opposite surface of the first adhesive layer along an edge of the first adhesive layer.