Glass fiber reinforced PBT (Poly Butylenes Terephthalate) combination special for large thin-wall part and preparation method thereof

A composition and glass fiber technology, applied in the field of glass fiber reinforced PBT composition and its preparation, can solve problems such as affecting the appearance of products, rough surface, dullness, etc., achieve high surface finish, low molding shrinkage, and eliminate warpage Effect

Inactive Publication Date: 2011-05-18
SHANGHAI SUNNY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the warping deformation of PBT plastic parts is more prominent, especially large thin-walled parts, which has become the main problem of PBT market sales
[0003] In addition, due to the poor dispersion of glass f

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1~4 and comparative example 1

[0030] The grade of PBT is Nantong Xingchen 1100A, which is ordinary grade and has a viscosity of 1.05 dl / g.

[0031] Table 1: Raw material ratio (weight percent %)

[0032] raw material name

[0033] Compatibilizer

[0034] First, put the above-mentioned components except glass fiber into the high-mixer according to the ratio in Table 1 and mix them for 5 minutes, then discharge; then, add the above-mentioned mixed raw materials into the twin-screw extruder for processing, and the glass The side feeding port is forced to feed, the screw rotation speed is 180-600 rpm, and the processing temperature is 220-240 ° C. After melt extrusion, granulation and packaging, the glass fiber reinforced PBT composition is obtained.

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PUM

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Abstract

The invention discloses a glass fiber reinforced PBT (Poly Butylenes Terephthalate) combination special for a large thin-wall part and a preparation method thereof, the PBT combination comprises the following raw materials in percentage by weight: 60-90 percent of PBT, 0-25 percent of glass fiber, 1-5 percent of compatilizer, 0-20 percent of talcum powder, 0-20 percent of micro beads, 0.1-1 percent of antioxidant and 0.1-0.5 percent of lubricant. According to the invention, the problem of serious warping of the glass fiber reinforced PBT is solved by taking general PBT as a main raw material and adopting a method of double-modifying the PBT through adding minerals into the short glass fiber, and the prepared PBT combination has the advantages of low warping degree, high gloss, high flowability and excellent mechanical property, and is very suitable for the large thin-wall part.

Description

technical field [0001] The invention relates to the field of polymer materials, in particular to a glass fiber reinforced PBT composition specially used for large thin-walled parts and a preparation method thereof. Background technique [0002] As one of the five major engineering plastics, polybutylene terephthalate (PBT) is widely used in electronic appliances, automobiles, mechanical equipment and precision plastics due to its good physical and mechanical properties, good electrical properties, and easy molding and processing. in the instrument industry. With the development of electronics, electrical and automobile industries, the development of PBT has broad prospects. However, the warping deformation of PBT plastic parts is relatively prominent, especially large thin-walled parts, which has become the main problem of PBT market sales. [0003] In addition, due to the poor dispersion of glass fiber in the glass fiber reinforced system, it will cause serious floating f...

Claims

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Application Information

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IPC IPC(8): C08L67/02C08K13/06C08K7/14C08K3/34C08K7/28C08K7/24
Inventor 徐东东杨涛
Owner SHANGHAI SUNNY
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