Liquid crystal polyester molding composition and application thereof

Abstract

The invention discloses a liquid crystal polyester molding composition and application thereof. The liquid crystal polyester molding composition is prepared from the following components: 30 to 100 parts of liquid crystal polyester, 0 to 30 parts of other thermoplastic polymers and 0 to 70 parts of enhanced packing; based on the total weight of the liquid crystal polyester molding composition, the weight content of a fluorine element is 50ppm to 2000ppm and the weight content of a magnesium element is 0.1ppm to 500ppm. According to the liquid crystal polyester molding composition, the content of the fluorine element in the liquid crystal polyester molding composition is controlled within a range of 50ppm to 2000ppm and the weight content of the magnesium element is controlled within a range of 0.1ppm to 500ppm, so that a fiber self-formation capability of the liquid crystal polyester can be effectively improved; self-formed fibers are induced by the fluorine element to be arrayed and have a direction disordered property; the two elements are synergistically combined so that the liquid crystal polyester molding composition has good high-rigidity performance and the difference of thermal expansibility in vertical and horizontal directions can be remarkably reduced; the liquid crystal polyester molding composition is used as an exhausting blade device material and a prepared product has the advantages of thin walls and light weight; the utilization stability of an exhausting blade device can be remarkably improved; the service life is prolonged in a severe environment; the exhausting blade device has the characteristics of uneasiness of being abraded, aged and deformed, small noises and the like.

Description

technical field [0001] The invention relates to the field of special engineering plastics, in particular to a liquid crystal polyester molding composition and its application. Background technique [0002] As a high-performance special engineering plastic, thermotropic liquid crystal polyester (TLCP) has excellent mechanical properties, good thermal processing fluidity, creep resistance and high dimensional stability, high and low temperature resistance, chemical corrosion resistance, and Aging resistance, self-reinforcement, self-flame retardancy and electrical insulation properties are widely used in the fields of electronic and electrical components, especially in the field of exhaust blade device parts with high environmental requirements, such as high temperature, heavy dust, air Computers, TVs, air conditioners, communication products, optoelectronic products, consumer electronics products, automotive electronic equipment, switches, medical equipment, heaters, air cond...

AI Technical Summary

Problems solved by technology

Patents CN204299902U and CN204125918U mentioned that liquid crystal polymer has the advantages of thin wall and light weight as the application material of fans, but as a new utility patent, its performance shortcomings have not been optimized

Due to the anisotropic properties of liquid crystal polyester, it has the characteristics of single orientation in the processing flow direction, so it has completely different properties in the flow direction and vertical flow direction, especially the thermal expansion of the workpiece has a large difference in the vertical and horizontal directions. As a result, in the process of use under high temperature conditions, due to the difference in thermal expansion coefficient, the shape of the blade will change during the long-term use process, which will affect the exhaust effect and stability of use, although the amount of deformation is relative to other materials. It is extremely small, but it will still affect the stability of the precision exhaust blade parts

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