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Continuous fiber reinforced thermoplastic prepreg tape braided fabric and continuous fiber reinforced thermoplastic prepreg tape plate preparation method

A technology for reinforcing thermoplastic and continuous fibers, applied in the field of prepreg braid sheet preparation, can solve problems such as difficulty in impregnation, and achieve the effects of solving difficulty in impregnation, reducing energy consumption, and achieving excellent performance

Inactive Publication Date: 2012-08-01
EAST CHINA UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The traditional process of continuous fiber-reinforced thermoplastic composites generally uses continuous fiber braids or fiber cloths as raw materials. It is difficult for the braids to be fully impregnated by high-viscosity thermoplastic melts, which has the disadvantage of difficult impregnation.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] In the step (1), a continuous glass fiber reinforced polypropylene prepreg tape is prepared by using a process method of melt impregnation. During the impregnation process, the resin melt extruded by the single-screw extruder or twin-screw extruder impregnates the continuous glass fiber strands; the temperature of the conveying section of the extruder is 140-160°C, and the temperature of the compression section is 200-210°C. The metering section and impregnation temperature are at 220°C; the adjusting range of the screw speed of the extruder is 10-60r / min; after cooling, a continuous glass fiber reinforced polypropylene prepreg tape is obtained. The resin melt composition includes 100 parts by mass (the same below) of polypropylene resin, 3 to 10 parts of compatibilizer (maleic anhydride grafted polypropylene, MPP), 0.3 to 1 part of antioxidant (antioxidant 1010 : Antioxidant 168=5:3~4), 0.5~1.5 parts of lubricant (ethylene bisstearic acid amide, EBS) and 0.5~1.5 parts ...

Embodiment 2

[0028] The same process steps as in Example 1 were used to prepare the continuous glass fiber reinforced polypropylene prepreg tape and its braided sheet.

[0029] The fiber mass content of the prepreg tape is controlled at 55%, and the main mechanical properties of the continuous fiber reinforced polypropylene prepreg tape braided sheet prepared through the above steps are as follows:

[0030] Bending strength: >550MPa;

[0031] Flexural modulus: >25GPa;

[0032] Notched impact strength: >110kJ / m 2 ;

Embodiment 3

[0034] The specific process is the same as in Example 1, the only difference is that: the continuous fiber carbon fiber reinforced polyphenylene sulfide prepreg tape is prepared by the process method of melt impregnation, and the extruded melt is polyphenylene sulfide resin; The section temperature is 240-260°C, the compression section temperature is 280-290°C, the extrusion metering section and impregnation temperature are 320°C; the extruder screw speed adjustment range is 10-60r / min; The temperature is 320°C.

[0035] The fiber mass content of the prepreg tape is controlled at 50%, and the main mechanical properties of the continuous carbon fiber reinforced polyphenylene sulfide prepreg tape braided sheet prepared through the above steps are as follows:

[0036] Bending strength: >1500MPa;

[0037] Flexural modulus: >120GPa

[0038] Notched impact strength: >220kJ / m 2 ;

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Abstract

The invention relates to a prepreg tape braided fabric plate preparation method, in particular to a continuous fiber reinforced thermoplastic prepreg tape braided fabric and a continuous fiber reinforced thermoplastic prepreg tape plate preparation method. The preparation method comprises the steps: the continuous fiber reinforced thermoplastic prepreg tape with an excellent soaking effect is prepared in a melting soaking manner, a powder soaking manner or other manners at first, so that the defect of difficult soaking can be effectively overcome; then braided fabric is obtained through different braiding manners as required; and finally the plate with excellent performance is prepared through different moulding manners. Meanwhile, the braided fabric can be directly used for reinforcing short or long fiber reinforced thermoplastic composite materials, and can greatly improve the material performance, particularly impact strength.

Description

technical field [0001] The invention relates to a preparation method of a prepreg braided fabric board, in particular to a preparation method of a continuous fiber reinforced thermoplastic prepreg tape braided fabric and a board thereof. Background technique [0002] Continuous fiber-reinforced thermoplastic composites have properties far superior to those of short-fiber and long-fiber-reinforced thermoplastic composites due to the special shape of the reinforcing fibers. They can be used in areas with strict performance requirements and have great potential as load-bearing structural parts. The traditional process of continuous fiber reinforced thermoplastic composites generally uses continuous fiber braids or fiber cloths as raw materials. It is difficult for the braids as a whole to be fully impregnated by high-viscosity thermoplastic melts, which has the disadvantage of difficult impregnation. Contents of the invention [0003] The present invention aims to provide a p...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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Application Information

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IPC IPC(8): B29C70/50B29C70/02
Inventor 周晓东方立郭兵兵陈旭清范传杰林群芳
Owner EAST CHINA UNIV OF SCI & TECH
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