Surface Protection Film Adhesive Layer Composition for Flexible OLED Manufacturing
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing surface protective films for flexible optical devices face challenges with low gas barrier properties and contamination due to the migration of plasticizers, which affect adhesive strength and residue issues during the manufacturing process of organic light-emitting electronic devices.
Innovation Solution
A surface protective film with a base layer and an adhesive layer composed of a cured material including a urethane polymer, an acryl-based polymer, and a curing agent, featuring (meth)acrylate monomers with alkyl groups of 10 or more carbon atoms, hydroxyl groups, and silicone units, ensuring low adhesive strength at room temperature and maintaining strength at elevated temperatures, while minimizing residue and peel strength.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a plasticizer is added to a urethane-based adhesive to reduce adhesive strength, then low adhesive strength is obtained, but surface contamination occurs due to plasticizer migration
Solution Approach 1:
The patent removes the plasticizer component from the adhesive composition entirely, extracting the harmful element that causes migration and contamination while seeking alternative ways to achieve the desired low adhesive strength through different chemical components and formulations
Solution Approach 2:
The patent changes the chemical parameters of the adhesive by using specific urethane polymers with controlled molecular weights, viscosity ranges, and functional group compositions to achieve low adhesive strength without relying on plasticizers, thereby eliminating migration issues
2Strength
If the adhesive strength is reduced for easy removal, then low peel strength is achieved, but adhesion may be insufficient at high temperatures
Solution Approach 1:
The patent creates different local properties within the adhesive system by combining urethane polymers with specific functional groups that provide temperature-resistant adhesion while maintaining overall low peel strength, allowing the adhesive to exhibit different characteristics at different temperature conditions
Solution Approach 2:
The patent uses composite adhesive formulations combining urethane polymers with specific functional groups and co-polymers to achieve a balance between low peel strength for easy removal and sufficient adhesion stability at high temperatures during the manufacturing process
3Reliability
If the surface protective film is left unattended under high temperature and high humidity, then adhesive strength may increase causing residue, but removal is needed to prevent contamination
Solution Approach 1:
The patent removes plasticizers from the adhesive formulation, eliminating the component that migrates and causes residue under high temperature and humidity conditions, while maintaining adhesive stability through alternative polymer compositions
Solution Approach 2:
The patent designs the adhesive to provide temporary protection during the manufacturing process with controlled adhesion that allows clean removal, treating the surface protective film as a disposable element that serves its purpose and is then easily removed without leaving residue
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 achieves low adhesive strength for easy removal with low peel strength, maintains adhesion at high temperatures, and reduces residue, enhancing the productivity and quality of organic light-emitting electronic devices by preventing contamination and damage.
Implementation Method 1
an adhesive layer provided on one surface of the base layer, wherein the adhesive layer includes a cured material of an adhesive composition including a urethane polymer; an acryl-based polymer; and a curing agent
Data Source
AI summary
The present application relates to a surface protective film, a method for preparing a surface protective film, and a method for manufacturing an organic light emitting electronic device.