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Discontinuous polyimide long fiber reinforced thermoplastic resin matrix composite material and preparation method thereof

A thermoplastic resin and polyimide long technology, which is applied in the field of discontinuous polyimide long fiber reinforced thermoplastic resin-based composite materials and its preparation, can solve problems such as fiber damage, application limitations, and affecting the mechanical properties of composite materials. Achieve high production efficiency, easy operation, and obvious lightweight effect

Inactive Publication Date: 2018-12-07
HANGZHOU INST OF ADVANCED MATERIAL BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The reinforcement mode of traditional inorganic fiber-reinforced thermoplastic composites is mostly short fiber reinforcement, but during the processing of short fiber reinforcement technology, when the fiber is mixed with the resin in the extruder, the fiber will be greatly affected by the shearing action of the screw. The residual length of fibers in the obtained pellets is only 0.2-1 mm, and the residual length of fibers in the products obtained by injection molding will be shorter. In this way, the reduction of the residual length of fibers will greatly affect the mechanical properties of composite materials. Therefore, its application also restricted

Method used

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  • Discontinuous polyimide long fiber reinforced thermoplastic resin matrix composite material and preparation method thereof
  • Discontinuous polyimide long fiber reinforced thermoplastic resin matrix composite material and preparation method thereof
  • Discontinuous polyimide long fiber reinforced thermoplastic resin matrix composite material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] The composition and mass percentage content of a discontinuous polyimide long fiber reinforced thermoplastic resin matrix composite material are as follows:

[0023]

[0024] The preparation steps are as follows:

[0025] 1. Weigh nylon 6 resin, light stabilizer, antioxidant, and lubricant according to mass percentage, and put all the raw materials into a high-speed mixer in the stated order and mix them evenly.

[0026] 2. Put the mixed material in step 1 through the hopper into the twin-screw extruder for melt blending. The melting temperature of each zone is set as: 185°C for zone 1, 195°C for zone 2, 200°C for zone 3, and 200°C for zone 4. 205°C, 205°C in the fifth zone, 205°C in the sixth zone, 200°C in the seventh zone, 190°C at the head, and the screw speed is 237 rpm. The setting temperature of the dipping mold: 235°C for the first zone, 235°C for the second zone, and 230°C for the third zone.

[0027] 3. The nylon 6 melt extruded in step 1 is directly intr...

Embodiment 2

[0029] The composition and mass percentage content of a discontinuous polyimide long fiber reinforced thermoplastic resin matrix composite material are as follows:

[0030]

[0031] The preparation steps are as follows:

[0032] 1. Weigh nylon 66 resin, light stabilizer, antioxidant, and lubricant according to mass percentage, and put all the raw materials into a high-speed mixer in the stated order and mix them evenly.

[0033] 2. Put the mixed material in step 1 through the hopper into the twin-screw extruder for melt blending. The melting temperature of each zone is set as: 205°C for the first zone, 210°C for the second zone, 215°C for the third zone, and 215°C for the fourth zone 215°C, 215°C in the fifth zone, 210°C in the sixth zone, 210°C in the seventh zone, 195°C at the head, and the screw speed is 250 rpm. The set temperature of the dipping mold: 245°C in the first zone, 245°C in the second zone, and 240°C in the third zone.

[0034] 3. The nylon 66 melt extrude...

Embodiment 3

[0036]The composition and mass percentage content of a discontinuous polyimide long fiber reinforced thermoplastic resin matrix composite material are as follows:

[0037]

[0038]

[0039] The preparation steps are as follows:

[0040] 1. Weigh the PC resin, light stabilizer, antioxidant, and lubricant according to the mass percentage, and put all the raw materials into the high-speed mixer in the stated order and mix them evenly.

[0041] 2. Put the mixed material in step 1 through the hopper into the twin-screw extruder for melt blending. The melting temperature of each zone is set as: 215°C in the first zone, 220°C in the second zone, 220°C in the third zone, and 220°C in the fourth zone 220°C, 215°C in the fifth zone, 215°C in the sixth zone, 210°C in the seventh zone, 200°C at the head, and the screw speed is 220 rpm. The set temperature of the dipping mold: 250°C for the first zone, 250°C for the second zone, and 245°C for the third zone.

[0042] 3. The PC melt...

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Abstract

The invention discloses a discontinuous polyimide long fiber reinforced thermoplastic resin matrix composite material and a preparation method thereof. The composite material comprises, by mass, thermoplastic resin 70.0-90.0 wt.%, polyimide long fiber 29.0-9.0 wt.%, light stabilizer 0.1-0.2 wt.%, antioxidant 0.1-0.2 wt.%, and lubricant 0.2-0.8 wt.%. The composite material is prepared into strip pellets having a length of 10+ / -0.2 mm or 25+ / -0.5 mm for injection and compression molding respectively by a melt pultrusion method. The composite material prepared by the technology of the invention has the characteristics of excellent comprehensive mechanical properties and good light weight effect, and is particularly suitable for the manufacture of aircraft parts such as unmanned aerial vehicles and large aircrafts which require high strength and light weight.

Description

technical field [0001] The invention relates to the field of composite materials, in particular to a discontinuous polyimide long fiber reinforced thermoplastic resin-based composite material and a preparation method thereof. Background technique [0002] The development of high-performance lightweight composite materials is one of the most important development directions in the field of composite material manufacturing. The lightweight high-performance resin-based composite material developed by using lightweight inorganic fiber reinforced composite technology can replace steel and aluminum-magnesium alloy materials and is widely used in the production and manufacture of engineering and structural parts. The products developed from this have been widely used in automobiles , rail transportation, shipbuilding, aerospace and national defense and military industry, and become an important pillar material for the country's economic development. Fiber-reinforced plastics are a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L77/02C08L77/06C08L69/00C08L67/02C08L55/02C08L79/08C08J5/06
CPCC08J5/06C08J2355/02C08J2367/02C08J2369/00C08J2377/02C08J2377/06C08J2455/02C08J2479/08
Inventor 汪晓东韩恩林武德珍
Owner HANGZHOU INST OF ADVANCED MATERIAL BEIJING UNIV OF CHEM TECH