Surface Protective Film Structure for Drum Roll Lamination
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Solution Overview
Problem
Existing plastic substrates for flexible displays have low gas barrier characteristics for moisture and oxygen, necessitating a surface protective film to safeguard the thin film encapsulation layer during manufacturing, and existing barrier films are inadequate for continuous attachment by drum roll lamination.
Innovation Solution
A surface protective film with a base layer comprising a first and second anti-static layer, and an adhesive layer, designed to meet the condition (Adhesive Strength A)−(Adhesive Strength B)>0.5gf/in, enabling easy attachment to both glass and a drum pad, facilitating drum roll lamination.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a surface protective film is attached to a drum pad for continuous manufacturing, then productivity is improved, but the drum pad becomes contaminated and adhesive strength decreases
Solution Approach 1:
The patent introduces an intermediate release layer between the adhesive layer and the drum pad. This release layer acts as a mediator that prevents direct contamination transfer between the surface protective film and the drum pad, while still allowing for effective attachment and release during the lamination process
Solution Approach 2:
The patent modifies the surface properties of the release layer by controlling its contact angle to be 40° or more. This parameter change creates optimal adhesion characteristics that allow the film to attach firmly during lamination but release easily afterward, preventing contamination accumulation on the drum pad
2Reliability
If existing barrier films are used to protect the thin film encapsulation layer, then gas barrier characteristics are improved, but the films cannot be continuously attached by drum roll lamination
Solution Approach 1:
The patent divides the protective film into multiple functional layers: a base layer providing gas barrier characteristics, an adhesive layer enabling drum roll lamination, and a release layer preventing contamination. This segmentation allows each layer to fulfill its specific function while working together as an integrated system
Solution Approach 2:
The patent creates a composite film structure combining materials with different properties. The base layer uses barrier materials for gas protection, while the adhesive layer incorporates materials suitable for drum roll lamination processes, creating a composite that achieves both protection and manufacturability
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 film enhances productivity by allowing continuous attachment to the encapsulation layer, reduces drum pad contamination, and extends the service life of the drum pad through maintained adhesive strength during repeated use.
Implementation Method 1
an adhesive layer provided on a surface opposite to a surface of the second anti-static layer on which the base film is provided
Data Source
AI summary
The present disclosure relates to a surface protective film; and a method for manufacturing an organic light emitting electronic device using the same.