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Method for testing shear dispersion performance of glass fibers in thermoplastic plastics

A thermoplastic and glass fiber technology, applied in the field of shear dispersion performance testing of thermoplastic glass fibers, can solve the problems of high cost, long evaluation period, and inability to reflect the shear dispersion performance of glass fibers in a timely, effective and accurate manner. Achieve accurate evaluation and overcome the effect of evaluation cycle

Active Publication Date: 2015-07-22
JUSHI GRP CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the general operation is that GFRTP manufacturers judge the shear dispersion performance of glass fiber in thermoplastics by comparing the extruder screw loss, production efficiency and product performance after long-term production: if the extruder screw loss is small, the production High efficiency and good product performance indicate that glass fiber has good shear dispersion performance in thermoplastics; if the extruder screw loss is large, production efficiency is low, and product performance is poor, it indicates that glass fiber has poor shear dispersion performance in thermoplastics
[0004] At present, the method of testing the shear dispersion performance of glass fiber in thermoplastics in the industry is mainly to determine the shear dispersion performance of glass fiber in thermoplastics by comparing the loss of extruder screw, production efficiency and product performance after long-term production. , the evaluation period is long, the cost is high, and the evaluation results are easily disturbed by external factors, which cannot reflect the shear dispersion properties of glass fibers in thermoplastics in a timely, effective and accurate manner.

Method used

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  • Method for testing shear dispersion performance of glass fibers in thermoplastic plastics
  • Method for testing shear dispersion performance of glass fibers in thermoplastic plastics
  • Method for testing shear dispersion performance of glass fibers in thermoplastic plastics

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Raw materials: glass fiber: Jushi Group Co., Ltd., ER13-2000-988A; Jushi Group Co., Ltd., ER13-2000-910; thermoplastics: polypropylene (PP), Sinopec, F401, melt properties: 230 ° C load is 2.16 Under the condition of kg, the melt index is 4.02g / min;

[0032] Test conditions: temperature is 23°C, relative humidity is 50%.

[0033] Test steps:

[0034](1) According to the melt characteristics of the glass fiber to be tested and the thermoplastic to be tested, adjust the twin-screw extruder to a screw combination with appropriate shear force, and increase the temperature range of the twin-screw extruder to 210-230°C ;

[0035] (2) Put the thermoplastic in a vacuum drying oven, set the baking temperature to 80° C., and the baking time to 2 hours. After the thermoplastic slices are dried, add them to the main feeding device of the twin-screw extruder , the rotating speed of setting main screw rod is 200rpm, and the yarn feeding amount of main screw rod is 8000tex, and the...

Embodiment 2

[0045] Raw materials: glass fiber: Jushi Group Co., Ltd., ER13-2000-988A; Jushi Group Co., Ltd., ER13-2000-910; thermoplastics: polypropylene (PP), Sinopec, F401, melt properties: 230 ° C load is 2.16 Under the condition of kg, the melt index is 4.02g / min;

[0046] Test conditions: temperature is 23°C, relative humidity is 50%.

[0047] Test steps:

[0048] (1) According to the melt characteristics of the glass fiber to be tested and the thermoplastic to be tested, adjust the twin-screw extruder to a screw combination with appropriate shear force, and increase the temperature range of the twin-screw extruder to 210-230 ℃;

[0049] (2) Put the thermoplastic in a vacuum drying oven, set the baking temperature to 80° C., and the baking time to 2 hours. After the thermoplastic slices are dried, add them to the main feeding device of the twin-screw extruder , the rotating speed of setting main screw rod is 150rpm, and the yarn feeding amount of main screw rod is 6000tex, and the...

Embodiment 3

[0060] Raw materials: glass fiber: Jushi Group Co., Ltd., ER13-2000-988A; Jushi Group Co., Ltd., ER13-2000-910; thermoplastics: polypropylene (PP), Sinopec, F401, melt properties: 230 ° C load is 2.16 Under the condition of kg, the melt index is 4.02g / min;

[0061] Test conditions: temperature is 23°C, relative humidity is 50%.

[0062] Test steps:

[0063] (1) According to the melt characteristics of the glass fiber to be tested and the thermoplastic to be tested, adjust the twin-screw extruder to a screw combination with appropriate shear force, and increase the temperature range of the twin-screw extruder to 210-230 ℃;

[0064] (2) Put the thermoplastic in a vacuum drying oven, set the baking temperature to 80° C., and the baking time to 2 hours. After the thermoplastic slices are dried, add them to the main feeding device of the twin-screw extruder , the rotating speed of setting main screw rod is 300rpm, and the yarn feeding amount of main screw rod is 10000tex, and th...

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Abstract

The invention provides a method for testing the shear dispersion performance of glass fibers in thermoplastic plastics. The testing method comprises the following steps: granulating thermoplastic plastics and glass fibers by a dual-screw extruder in a stipulated testing environment, and recording a current value I of a host machine of the dual-screw extruder after granulation stabilization at random; firing obtained plastic granules, cooling to room temperature, and measuring the reserved length L of the glass fibers at random points by an optical microscope; and evaluating the shear dispersion performance of the glass fibers in the thermoplastic plastics according to the arithmetic mean value of the current of the host machine and the arithmetic mean value of the reserved length of the glass fibers. The testing method provided by the invention overcomes the defects that a traditional method is long in evaluation cycle and high in cost, and the evaluation result can be interfered easily by external factors, and can be used for quantitatively evaluating the shear dispersion performance of the glass fibers timely, effectively and accurately.

Description

(1) Technical field [0001] The invention relates to a method for testing the shear dispersion performance of glass fibers, in particular to a method for testing the shear dispersion performance of thermoplastic glass fibers, which can be used for quantitative evaluation of the shear dispersion performance of glass fibers in thermoplastics. (2) Background technology [0002] With the advancement of science and technology and the development of society, people pay more and more attention to composite materials with excellent performance. Among them, glass fiber reinforced thermoplastics (hereinafter referred to as GFRTP) can replace wood and steel to a certain extent, and are widely used in industry, Transportation, construction, electrical appliances and other aspects occupy an extremely important position in production and life. The continuous high-end of the market has put forward stricter requirements for the GFRTP industry. Under the shearing action of the extruder screw,...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N33/38G01N33/44
Inventor 张志坚杨扬陆建明章建忠费振宇
Owner JUSHI GRP CO
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