Aromatic Liquid Crystal Polyester Resin Anti-Static Filler
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Solution Overview
Problem
Wholly aromatic liquid crystalline polyester resins used in electronic products often suffer from appearance defects and reduced mechanical and electrical insulating strength due to foreign materials, dust, or resin powder during the injection process, leading to increased manufacturing costs and reduced price competitiveness.
Innovation Solution
A wholly aromatic liquid crystalline polyester resin compound incorporating an electrically conductive filler, such as carbon black, carbon fiber, or carbon nanotubes, with a surface resistance of 10^7 to 4x10^11 Ω/sq, which prevents foreign materials from adhering and enhances mechanical and electrical properties, while also providing electromagnetic wave shielding.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If foreign material removal equipments such as clean room are used to prevent appearance defects, then product quality is improved, but manufacturing cost increases
Solution Approach 1:
The patent applies the 'Blessing in disguise' principle by converting the harmful static electricity that attracts foreign materials into a beneficial anti-static property. By incorporating electrically conductive fillers (carbon black, carbon fiber, metal powder, or conductive inorganic powder) at concentrations of 1-50 wt%, the resin compound develops surface resistance between 10^5-10^12 Ω/sq, which prevents static charge accumulation and thereby repels foreign materials during injection molding, eliminating the need for expensive clean room facilities.
2Manufacturing precision
If electrically conductive filler is added to prevent appearance defects, then product quality is improved, but electrical insulating strength deteriorates
Solution Approach 1:
The patent applies the 'Parameter changes' principle by precisely controlling the concentration of electrically conductive fillers within 1-50 wt% and adjusting surface resistance to fall within 10^5-10^12 Ω/sq. This parameter optimization creates a balance where the resin compound has sufficient anti-static properties to prevent foreign material adhesion while maintaining adequate electrical insulating strength for electronic product applications. The liquid crystalline polyester resin matrix also contributes to maintaining mechanical and electrical properties despite filler incorporation.
3Productivity
If resin compound is processed using injection to improve productivity, then manufacturing efficiency is improved, but foreign materials attach to products causing appearance defects
Solution Approach 1:
The patent applies the 'Preliminary action' principle by pre-incorporating electrically conductive fillers into the resin compound before the injection molding process. This preliminary addition of conductive agents ensures that the resin compound already possesses anti-static properties prior to processing, preventing foreign material adhesion during injection molding. As a result, high productivity through injection processing is maintained while appearance quality is protected from defects caused by foreign material contamination.
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 use of the conductive filler in the resin compound prevents appearance defects, maintains high mechanical and electrical insulating strength, and allows for effective electromagnetic wave shielding, improving manufacturing efficiency and product quality.
Implementation Method 1
a wholly aromatic liquid crystalline polyester resin compound comprising: a wholly aromatic liquid crystalline polyester resin having a melting point of 300 to 450 °C. and an electrically conductive filler... the wholly aromatic liquid crystalline polyester resin compound has a surface resistance of 10^7 to 4×10^11 Ω/sq
Implementation Method 2
When the wholly aromatic liquid crystalline polyester resin compound is used in manufacturing an electronic product causing electromagnetic waves, the effects of shielding electromagnetic waves may be obtained
Data Source
AI summary
A wholly aromatic liquid crystalline polyester resin compound and a product are disclosed. The disclosed wholly aromatic liquid crystal polyester resin compound includes a wholly aromatic liquid crystal polyester resin and an electroconductive filter.