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Anti-warp glass fiber reinforced polycarbonate composition with high rigidity and toughness and good appearance

A technology of high rigidity and toughness, polycarbonate, applied in the field of glass fiber reinforced polycarbonate composition with high rigidity, good appearance and anti-warpage, which can solve unfavorable production and cost control, need to improve warpage resistance, and demanding raw materials and other problems, to achieve the effect of improving warpage and surface appearance, improving injection fluidity, excellent rigidity and toughness

Inactive Publication Date: 2009-09-23
KINGFA SCI & TECH CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The defect of the composition is that the toughness is insufficient, the warpage resistance needs to be improved, especially the high glass fiber content of 30-40%, and the requirements for the required raw materials are harsh, which is not conducive to actual production and cost control

Method used

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  • Anti-warp glass fiber reinforced polycarbonate composition with high rigidity and toughness and good appearance
  • Anti-warp glass fiber reinforced polycarbonate composition with high rigidity and toughness and good appearance
  • Anti-warp glass fiber reinforced polycarbonate composition with high rigidity and toughness and good appearance

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0018] In this part, A1-A5 are used to represent Comparative Examples 1-5, and B1-B5 are used to represent Examples 1-5.

[0019] According to Table 1, mix the components except the glass fiber in a high-speed mixer for 2-3 minutes, and then extrude and granulate at 230-260°C. During this process, long glass fibers or short The cut glass fiber is fed to the extruder in proportion. The granulated pellets were dried and then injection molded into standard specimens at a temperature of 280°C. The mechanical properties were tested according to ASTM standards, as shown in Table 2.

[0020] The degree of warpage deformation and appearance are judged by the company's internal self-defined test method:

[0021] (1) Determination of warpage deformation: Under the same injection molding process conditions, different materials are injected into parts with a length of 50cm x width 5cm x thickness 2.0cm, and after being placed at room temperature for 24 hours, the distance from the horizo...

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Abstract

The invention discloses an anti-warp glass fiber reinforced polycarbonate composition with high rigidity and toughness and good appearance, which comprises the following components by weight percentage: 30 to 89.5 percent of polycarbonate resin, 5 to 20 percent of copolyester resin, 5 to 40 percent of alkali-free glass fiber and the balance of assistant. The composition has high rigidity and toughness, has effects on obviously improving the warping degree of injection-molded parts and the surface appearance and can be applied to the fields of precision machinery parts, office equipment parts, computer socket connectors, automobile bracket structural members, and the like.

Description

technical field [0001] The invention relates to the field of polymer composite materials, in particular to a glass fiber-reinforced polycarbonate composition with high rigidity, toughness, good appearance and anti-warping. Background technique [0002] Due to its excellent mechanical properties, electrical properties and dimensional stability, glass fiber reinforced polycarbonate materials are widely used in precision mechanical parts (structural parts and appearance parts of various precision instruments such as cameras and video recorders), office equipment parts Components (heat-resistant structural parts of printers, copiers, and scanners), computer connectors, automotive bracket structural parts, etc. In these application fields, thin-walled injection molding and excellent appearance are required to meet the requirements of precision parts. Therefore, it is often encountered that injection molded parts have large warping deformation and "floating fibers" on the surface....

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L69/00C08L67/02C08L67/08C08K13/02C08K9/04C08K7/14C08J5/08
Inventor 何继辉欧阳晓岳徐布衣刘思杨
Owner KINGFA SCI & TECH CO LTD
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