Acrylate Adhesive Composition for Optical Component Rework
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Solution Overview
Problem
Existing adhesive compositions for optical components lack sufficient reworkability and optical characteristics, making it difficult to separate and recycle expensive optical components with foreign particles or defects without causing damage.
Innovation Solution
An acrylate-based adhesive composition with a specific monomer ratio and cross-linking agent, forming a copolymer with a weight average molecular weight of 400,000 to 1,000,000, which provides high adhesive strength at room temperature and reduced adhesive strength at elevated temperatures, enabling reliable fixing and easy separation of optical components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional adhesive compositions are used to fix optical components, then fixing properties are achieved, but reworkability is insufficient and optical characteristics deteriorate
Solution Approach 1:
The adhesive composition utilizes temperature-dependent parameter changes in the copolymer structure. At room temperature, the adhesive maintains strong bonding through its polymer chain configuration. When heated to 90°C or higher, the adhesive undergoes parameter changes that reduce its bonding strength, enabling easy separation and reworkability while maintaining optical characteristics.
2Reliability
If adhesive strength is increased for reliable fixing, then fixing reliability improves, but separation and recycling of optical components becomes difficult
Solution Approach 1:
The adhesive bonding strength is made dynamic rather than static. The copolymer structure provides high bonding strength at room temperature for reliable fixing, but this strength dynamically decreases when temperature increases to 90°C or higher. This dynamic property allows the same adhesive to facilitate both reliable fixing and easy separation/recycling without requiring different adhesive materials.
3Illumination intensity
If adhesive composition is optimized for optical characteristics, then transparency is improved, but fixing properties and reworkability balance becomes difficult
Solution Approach 1:
The adhesive uses a composite copolymer structure combining multiple monomer components (first alkyl (meth)acrylate with C16-C22 alkyl group, second alkyl (meth)acrylate with C1-C12 alkyl group, and polar monomer) in specific ratios. This composite material approach allows simultaneous optimization of transparency, fixing properties, and reworkability by leveraging the complementary characteristics of different monomer units within the copolymer chain.
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 acrylate-based adhesive composition ensures high reliability in fixing optical components while allowing for easy rework by reducing adhesive strength at higher temperatures, minimizing damage and maintaining excellent optical characteristics such as transparency.
Implementation Method 1
a copolymer prepared by polymerizing monomers with a cross-linking agent
Implementation Method 2
reduced adhesive strength at elevated temperatures, enabling reliable fixing and easy separation of optical components
Data Source
AI summary
Disclosed is an acrylate based adhesive composition for optical use that includes: a copolymer prepared by polymerizing an alkyl (meth)acrylate (wherein the alkyl is a C16 to C22 linear alkyl group) in an amount of about 1 to about 10 parts by weight, an alkyl (meth)acrylate (wherein the alkyl is a C1 to C12 alkyl group) in an amount of about 70 to about 98 parts by weight, and a polar monomer in an amount of about 1 to about 20 parts by weight; and a cross-linking agent. The cross-linking agent is included in an amount of about 0.5 to 5 parts by weight based on 100 parts by weight of the copolymer.