A kind of liquid crystal polyester molding composition and its application

Abstract

Disclosed are a liquid crystal polyester molded composition and application thereof. The composition comprises the following components: 30-100 parts of liquid crystal polyester, 0-30 parts of other thermoplastic polymers, and 0-70 parts of reinforcing filler. On the basis of the total weight of the liquid crystal polyester molded composition, the weight content of fluorine is 50-2,000 ppm, and the weight content of magnesium is 0.1-500 ppm. According to the present invention, the content of fluorine in the liquid crystal polyester molded composition is controlled within the range of 50-2,000 ppm, and the content of magnesium is controlled within the range of 0.1-500 ppm, thereby effectively improving the autologous fiber ability of the liquid crystal polyester. Moreover, induced autologous fiber arrangement of fluorine has the directional disorder characteristic. Synergistic combination of the two elements can significantly reduce the difference of thermal expansion in vertical and horizontal directions while enabling the liquid crystal polyester molded composition to have excellent rigidity. Therefore, workpieces prepared from the liquid crystal polyester molded composition as the material of an exhaust blade are thin in wall, light in weight and low in noise, can significantly improve usage stability of the exhaust blade, prolong the service life in severe environment, and are not liable to wear, age or deform.

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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