Conductive Liquid Crystalline Polymer Composition
AssigneeTicona LLC
InventorYoung Shin Kim
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Abstract
A liquid crystalline polymer composition that is thermally and/or electrically conductive and has a reduced tendency to create a static electric charge during a molding operation is provided. More particularly, the composition contains carbon fibers distributed within a liquid crystalline polymer matrix. Through the use of carbon fibers having relatively high purity, high temperature sizing agent, and/or various process parameters, molded parts can be produced having excellent characteristics while minimizing the amount of carbon fibers contained within the polymer matrix.
Claims20
A molded part that comprises a polymer composition, the polymer composition comprising carbon fibers distributed within a liquid crystalline polymer matrix that constitutes from about 25 wt. % to about 95 wt % of the composition, wherein the molded part exhibits a surface resistivity of about 1×1014 or less as determined in accordance with IEC 60093 and/or a dielectric constant of about 5 or more as determined at a frequency of 10 MHz.
A method for forming a liquid crystalline polymer composition within an extruder, the extruder containing at least one rotatable screw within a barrel, wherein the screw has a total length and diameter and wherein a feed section and melt section located downstream from the feed section are defined along the length of the screw, the method comprising:
- supplying a liquid crystalline polymer to the feed section of the extruder;
- supplying carbon fibers to the extruder at a location downstream from the feed section where the liquid crystalline polymer is supplied;
- the carbon fibers comprising a sizing agent, the sizing agent comprising an aromatic polymer;
- and
- blending the fibers and the liquid crystalline polymer within the extruder to form a liquid crystalline polymer composition.
Dependencies are inferred from the claim text.