Continuous filament reinforced plastic impregnation uniformity evaluation method

A technology of reinforced plastics and continuous fibers, which is applied in the field of qualitative evaluation of the impregnation effect of continuous fiber prepreg tapes, can solve the problems such as the impregnation degree characterization method is not given, and achieve the effect of complete impregnation and direct calculation methods

Inactive Publication Date: 2013-06-19
EAST CHINA UNIV OF SCI & TECH
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  • Abstract
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  • Application Information

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Problems solved by technology

[0004] Produced by Vetrotex Blended yarns can be used to manufacture fiber-reinforced thermoplastic resin prepreg tapes and pellets that are better impregnated, that is, the thermoplastic resin is melt-spun first, then mixed with other fibers, and then the pellets are prepared by heating and melting. The apparent impregnation degree of pellets is good, but the patent does not give a characterization method for the degree of impregnation

Method used

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  • Continuous filament reinforced plastic impregnation uniformity evaluation method
  • Continuous filament reinforced plastic impregnation uniformity evaluation method
  • Continuous filament reinforced plastic impregnation uniformity evaluation method

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Embodiment 1

[0038] The method for evaluating the impregnation uniformity of continuous fiber reinforced plastics includes the following steps:

[0039] (1) Take the impregnated sample, and cut a section of the sample. During the cutting process, prevent the sample from cracking; the sample is a cylindrical structure, the cross-sectional shape of the sample is circular, and the length of the cut sample is 10mm.

[0040] (2) Wet-grind the sample on the grinding machine with water abrasive paper from coarse to fine under running water, and then polish it with polishing fabric and polishing paste on the polishing machine until the cross-sectional shape of the sample is clearly visible under the microscope;

[0041] The sandpaper is 300#, 500#, 800# respectively.

[0042] If necessary, use an ultrasonic cleaner to clean the surface of the sample to remove the residual polishing paste.

[0043] (3) Place the sample under an optical microscope for microscopic inspection;

[0044] Place the pr...

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Abstract

A continuous filament reinforced plastic impregnation uniformity evaluation method includes a first step of taking an impregnation sample and cutting off a section of the sample, wherein sample cracking needs to be prevented in the cutting process, a second step of placing the sample on a plate grinding machine, carrying out wet grinding on the sample under flowing water through utilization of rough-thin waterproof abrasive paper in sequence, and placing the sample on a polishing machine to polish through utilization of polishing fabric and polishing paste until the section of the sample can be clearly seen under a microscope, a third step of placing the sample under the optical microscope for microscopic examination, a fourth step of taking pictures of the section of the sample, and a fifth step of carrying out statistical calculation and estimation. The continuous filament reinforced plastic impregnation uniformity evaluation method can enable continuous filament to be uniformly scattered and completely impregnated, and can also carry out qualitative evaluation on the continuous filament reinforced thermoplastic resin composite materials, and has the advantages of being simple and direct.

Description

technical field [0001] The invention relates to a method for evaluating the impregnation uniformity of continuous fiber-reinforced plastics, in particular to qualitatively evaluating the impregnation effect of a continuous fiber prepreg tape prepared by impregnation by a melt impregnation method. Background technique [0002] Thermoplastic composite materials are high-performance new materials that have made breakthroughs in recent years. They have remarkable characteristics such as high strength, high stiffness, dimensional stability, low warpage, long service life, and excellent creep resistance. Since the melt viscosity of thermoplastic resins generally exceeds 100 Pa.s, it is difficult to obtain good impregnation of continuous fibers. Solving how to obtain products with good impregnation effect is the key of this technology. [0003] Chinese patent CN101474868B discloses a preparation device and its application related to continuous fiber reinforced thermoplastic resin ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/84G01N1/32G01N1/34
Inventor 周晓东郭兵兵
Owner EAST CHINA UNIV OF SCI & TECH
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