Resin Composition for Flexible Display Adhesion
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing adhesive resins for flexible display devices face challenges in achieving reliable adhesion and discharge stability, particularly in forming uniform layers with high adhesiveness and suitable viscosity for folding and bending operations.
Innovation Solution
A resin composition comprising a (meth)acrylate oligomer with a glass transition temperature of 110°C to 140°C, a (meth)acrylate monomer, a urethane (meth)acrylate oligomer, and a photoinitiator, with a shear viscosity of 8 mPa·s to 50 mPa·s, applied using inkjet printing or dispensing methods to form an adhesive member with 180° peel strength of 300 gf/25 mm to 1500 gf/25 mm, ensuring excellent adhesion reliability and discharge stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If existing adhesive resins are used for flexible display devices, then adhesion can be achieved, but discharge stability and uniformity are poor
Solution Approach 1:
The patent adjusts the glass transition temperature of the (meth)acrylate oligomer to a specific range (110°C to 140°C) and controls the shear viscosity of the resin composition (8 mPa·s to 50 mPa·s) to achieve both reliable adhesion and stable discharge. This parameter optimization resolves the contradiction between adhesion reliability and discharge stability.
Solution Approach 2:
The patent creates a composite resin composition containing multiple components: (meth)acrylate oligomer, (meth)acrylate monomer, urethane (meth)acrylate oligomer, and photoinitiator. This composite formulation synergistically improves both the discharge stability and adhesion reliability, overcoming the limitations of existing single-component adhesive resins.
2Area of stationary object
If adhesive resin is applied to members of various shapes, then coverage can be achieved, but coatability is poor
Solution Approach 1:
The patent optimizes the shear viscosity parameter to 8 mPa·s to 50 mPa·s, which enables the adhesive resin to flow and conform to various member shapes while maintaining uniform coating. This viscosity control resolves the contradiction between achieving comprehensive coverage and maintaining ease of manufacturing through good coatability.
3Strength
If high adhesion is achieved, then bonding strength increases, but viscosity for application becomes unsuitable
Solution Approach 1:
The patent carefully balances the glass transition temperature of the oligomer (110°C to 140°C) and the shear viscosity (8 mPa·s to 50 mPa·s) to achieve high adhesion while maintaining suitable application viscosity. This dual parameter optimization resolves the contradiction between bonding strength and viscosity control.
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 resin composition provides an adhesive member with enhanced adhesion reliability and discharge stability, enabling reliable operation of flexible display devices during folding and bending, with stable discharge and uniform application.
Implementation Method 1
at least one photoinitiator
Data Source
AI summary
A resin composition includes: at least one (meth)acrylate oligomer having a glass transition temperature of about 110°° C. to about 140° C.; at least one (meth)acrylate monomer including a (meth)acryloyl group; at least one urethane (meth)acrylate oligomer, and at least one photoinitiator. The resin composition has a shear viscosity of about 8 mPa·s to about 50 mPa·s, which is measured by a JIS Z8803 method at a temperature of about 25° C.