Resin Composition Reflective Board Heat Resistance
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Solution Overview
Problem
Conventional resin compositions comprising liquid crystal polyester and titanium oxide filler suffer from inadequate dispersibility of the filler, leading to decreased reflectance and potential decomposition under high temperatures, resulting in abnormal appearances during soldering processes in LED light-emitting apparatuses.
Innovation Solution
A resin composition with a specific formulation of liquid crystal polyester and titanium oxide filler, where the aluminum content is converted to aluminum oxide content (A % by weight) and the volume average particle diameter (B μm) satisfy the conditions A ≥ 0.1 and A/B² ≤ 25, ensuring improved dispersibility and heat resistance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If liquid crystal polyester and titanium oxide filler are used to create high reflectance, then reflectance is improved, but filler dispersibility is insufficient leading to decreased reflectance
Solution Approach 1:
The invention changes the chemical composition parameters of the titanium oxide filler by controlling the Al2O3 content (0.01-5 wt%) and TiO2 content (95-99.99 wt%), and adjusts the particle size parameters (0.1-10 μm volume average diameter) to achieve optimal dispersibility and reflectance in the liquid crystal polyester matrix
Solution Approach 2:
The invention creates a composite material system consisting of liquid crystal polyester resin combined with specifically formulated titanium oxide filler containing controlled amounts of Al2O3, where the composite achieves both high reflectance and excellent filler dispersibility through the synergistic combination of materials with optimized parameters
2Productivity
If liquid crystal polyester and titanium oxide filler are contacted under high temperature for long periods, then processing is completed, but decomposition of liquid crystal polyester occurs
Solution Approach 1:
The invention performs preliminary action by adding heat-resistant agents and UV absorbers to the resin composition before the high-temperature processing step, and by pre-optimizing the titanium oxide filler composition with controlled Al2O3 content to create a stable system that resists decomposition during subsequent mounting and soldering processes
Solution Approach 2:
The invention introduces heat-resistant agents and UV absorbers as intermediary substances that mediate between the liquid crystal polyester and the high-temperature environment, protecting the polyester from thermal decomposition during mounting and soldering operations
3Ease of manufacture
If conventional resin compositions are used for reflective boards, then basic functionality is achieved, but abnormal appearance occurs during soldering due to vaporization of decomposed components
Solution Approach 1:
The invention applies beforehand cushioning by incorporating heat-resistant agents and UV absorbers into the resin composition prior to high-temperature processing, and by optimizing the titanium oxide filler composition to stabilize the liquid crystal polyester, thereby preventing thermal decomposition and the subsequent abnormal appearance (bulging) during soldering operations
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 solution provides a reflective board with enhanced reflectance and heat resistance, preventing abnormal appearances during high-temperature processes, thus improving the luminance and reliability of light-emitting apparatuses.
Implementation Method 1
high reflectance is required for reflective boards so as to improve the luminance of light-emitting apparatuses
Implementation Method 2
liquid crystal polymers, specifically liquid crystal polyesters are widely considered for the resin material
Data Source
AI summary
The present invention provides a resin composition comprising a liquid crystal polyester and a titanium oxide filler, wherein when a value obtained by converting the content of aluminum in the titanium oxide filler to the content of aluminum oxide is A (% by weight) and the volume average particle diameter of the titanium oxide filler is B (μm), A and B satisfy the formula (I): A≧0.1 and the formula (II): A/B2≦25, a reflective board obtained by molding the resin composition, and a light-emitting apparatus comprising the reflective board and a light-emitting element. According to the resin composition of the present invention, a reflective board having high reflectance and high heat resistance can be obtained. Furthermore, a light-emitting apparatus which is excellent in properties such as luminance can be obtained by using the reflective board.