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Long fiber reinforced high-flow conductive material and preparation method thereof

A conductive material and high-flow technology, applied in the field of long-fiber reinforced high-flow conductive materials and their preparation, can solve the problems of low impact resistance, poor electrical conductivity, easy cracking, etc., to achieve strong electrical conductivity, reduced resistivity, easy to The effect of injection molding

Pending Publication Date: 2021-04-09
厦门唯科模塑科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, the existing ordinary PP+20GF material has poor electrical conductivity, low impact resistance, and easy cracking, so it has certain limitations in use

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0028] The present invention also provides a preparation method of long fiber reinforced high flow conductive material, comprising the following steps:

[0029] S1. Firstly, the carbon fiber is surface-treated, and then the polypropylene, the carbon fiber, the toughening agent and the compatibilizer are weighed respectively according to the weight ratio, and mixed uniformly in a high-speed mixer to obtain a mixed material, then put the obtained mixture into a twin-screw extruder for melting, and then extrude it into a dipping die connected to the head of the twin-screw extruder;

[0030] Further, in a preferred embodiment of the present invention, air is used to oxidize the surface of the carbon fiber in a tubular heating furnace, the oxidation treatment temperature is 600-700° C., and the oxidation treatment time is 1-2 minutes. Untreated carbon fiber has a smooth surface, small specific surface area, low surface activity, and poor adhesion when mixed with polypropylene. Aft...

Embodiment 1

[0036] This embodiment provides a long fiber reinforced high flow conductive material, which includes the following components:

[0037] 72 parts of polypropylene, 10 parts of long glass fiber, 10 parts of carbon fiber, 4 parts of compatibilizer and 4 parts of toughening agent.

[0038] The preparation method of the above-mentioned long fiber reinforced high flow conductive material comprises the following steps:

[0039]S1. Use air to oxidize the surface of the carbon fiber in a tubular heating furnace. The oxidation treatment temperature is 600° C., and the oxidation treatment time is 2 minutes. Then weigh 72 parts of polypropylene, 10 parts of carbon fiber, 4 parts of toughening agent and 4 parts of compatibilizer respectively according to the weight ratio, and mix them uniformly in a high-speed mixer to obtain a mixture. Wherein, the stirring frequency of the high-speed mixer is 6 times, each stirring time is 10 min, and the mixing temperature is 80°C. Finally, the obtai...

Embodiment 2

[0043] This embodiment provides a long fiber reinforced high flow conductive material, which includes the following components:

[0044] 73 parts of polypropylene, 10 parts of long glass fiber, 12 parts of carbon fiber, 2 parts of compatibilizer and 3 parts of toughening agent.

[0045] The preparation method of the above-mentioned long fiber reinforced high flow conductive material comprises the following steps:

[0046] S1. Use air to oxidize the surface of the carbon fiber in a tubular heating furnace. The oxidation treatment temperature is 700° C., and the oxidation treatment time is 1 min. Then weigh 73 parts of polypropylene, 12 parts of carbon fiber, 3 parts of toughening agent and 3 parts of compatibilizer respectively according to the weight ratio, and mix them uniformly in a high-speed mixer to obtain a mixture. Wherein, the stirring frequency of the high-speed mixer is 6 times, each stirring time is 10 min, and the mixing temperature is 80°C. Finally, the obtained...

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PUM

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Abstract

The invention provides a long fiber reinforced high-fluidity conductive material, which comprises the following components in parts by weight: 60-80 parts of polypropylene, 5-15 parts of long glass fiber, 8-15 parts of carbon fiber, 1-6 parts of compatilizer and 1-5 parts of a toughening agent. The long fiber reinforced high-fluidity conductive material has excellent conductivity, toughness and fracture resistance, and is good in product fluidity and easy for injection molding. The invention also relates to a preparation method of the long fiber reinforced high-fluidity conductive material. The method comprises the following steps: carrying out surface treatment on carbon fibers, respectively weighing polypropylene, carbon fibers, a toughening agent and a compatilizer according to the weight ratio, uniformly mixing to obtain a mixture, putting the mixture into a twin-screw extruder, melting, and extruding into an impregnation mold; and dipping the long glass fiber, and then carrying out bracing, cooling, pelletizing and drying treatment to obtain the long fiber reinforced high-fluidity conductive material. The preparation method is simple in preparation process, easy to operate and suitable for industrial production.

Description

technical field [0001] The invention relates to the technical field of polymer materials, and in particular to a long-fiber-reinforced high-flow conductive material and a preparation method thereof. Background technique [0002] Polypropylene is a semi-crystalline thermoplastic. It has high impact resistance, strong mechanical properties, and resistance to various organic solvents and acid and alkali corrosion. It is widely used in industry and is one of the common polymer materials. PP+20GF is a common glass fiber reinforced modified polypropylene material. The performance of PP+20GF is better than that of polypropylene, and it is not easy to deform under high temperature and long-term low load conditions, which makes polypropylene parts have better dimensional stability. [0003] However, the existing common PP+20GF material has poor electrical conductivity, low impact resistance, and easy cracking. Therefore, it has certain limitations in the use process. Contents of...

Claims

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Application Information

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IPC IPC(8): C08L23/12C08L23/08C08L51/06C08K7/14C08K9/02C08K7/06C08J5/06C08J5/04
CPCC08J5/06C08J5/043C08J2323/12C08J2423/08C08J2451/06C08K7/14C08K9/02C08K7/06C08K2201/001
Inventor 庄辉阳傅元梧林永兴陈咏泉
Owner 厦门唯科模塑科技股份有限公司
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