High-strength carbon fiber reinforced halogen-free flame-retardant PA66 (Polyamide 66) composite material and preparation method

A high-strength carbon fiber and composite material technology, which is applied in the field of high-strength carbon fiber-reinforced halogen-free flame-retardant PA66 composite material and its preparation, can solve the problems of difficult processing, large dependence on environmental humidity, and large performance damage, and achieve comprehensive performance. High, excellent appearance, high mechanical performance effect

Inactive Publication Date: 2013-03-13
SHANGHAI SUNNY
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In terms of antistatic modification of nylon materials, adding a low molecular weight antistatic agent is the most common antistatic measure. This modified material mainly uses the moisture adsorbed by the antistatic agent on the surface of the material to reduce the surface resistivity, so the durability is poor, and it is not durable. Washing is highly dependent on the humidity of the environment. Some foreign scholars compound a certain amount of metal salt sol in the polymer containing ether bonds, and the metal ions cooperate with the ether bonds of th

Method used

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  • High-strength carbon fiber reinforced halogen-free flame-retardant PA66 (Polyamide 66) composite material and preparation method
  • High-strength carbon fiber reinforced halogen-free flame-retardant PA66 (Polyamide 66) composite material and preparation method
  • High-strength carbon fiber reinforced halogen-free flame-retardant PA66 (Polyamide 66) composite material and preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1-4

[0023] A preparation method of high-strength carbon fiber reinforced halogen-free flame-retardant PA66 composite material, comprising the following steps:

[0024] (1) Prepare materials according to the components and contents in Table 1. The resin viscosity of PA66 is 2..7, and the resin viscosity of PA6 is 2.4. The halogen-free flame retardant is a nitrogen-phosphorus composite flame retardant, and the phosphorus content 24-28%. Carbon fiber is polyacrylonitrile-based carbon fiber, and its tensile strength is >500kg / mm 2 , tensile modulus > 250G·Pa, graft type toughening modifier is ethylene-octene graft copolymer. The antioxidant is compounded by HD98 and 168 in a weight ratio of 1:1, and the lubricating and dispersing agent is silicone.

[0025] (2) Put the above-mentioned raw materials into a high mixer and mix them for 3-5 minutes before discharging to obtain a mixture, then control the processing temperature of the twin-screw extruder at 230-250°C, the screw speed at ...

Embodiment 5

[0032] A method for preparing a high-strength carbon fiber reinforced halogen-free flame-retardant PA66 composite material, the method comprising the following steps:

[0033] (1) prepare materials according to the following components and weight percentage content:

[0034]

[0035]

[0036] (2) Put the above raw materials into the high mixer and mix them for 3-5 minutes, then discharge to obtain the mixture, add carbon fiber from the side feeding port, and then control the processing temperature of the twin-screw extruder to 230-250°C, and the screw speed to 180 -600 rpm, put the mixture in a twin-screw extruder to extrude and granulate to obtain the product.

[0037] Both PA66 and PA6 are ordinary injection molding grade resins, the resin viscosity of PA66 is 2.4-3.2, and the resin viscosity of PA6 is 2.2-3.0. The halogen-free flame retardant is a nitrogen-phosphorus composite flame retardant compounded by OP1312 and MPP, wherein the phosphorus content is 24-28%. Th...

Embodiment 6

[0039] A method for preparing a high-strength carbon fiber reinforced halogen-free flame-retardant PA66 composite material, the method comprising the following steps:

[0040] (1) prepare materials according to the following components and weight percentage content:

[0041]

[0042] (2) Put the above raw materials into the high mixer and mix them for 3-5 minutes, then discharge to obtain the mixture, add carbon fiber from the side feeding port, and then control the processing temperature of the twin-screw extruder to 230-250°C, and the screw speed to 180 -600 rpm, put the mixture in a twin-screw extruder to extrude and granulate to obtain the product.

[0043] Both PA66 and PA6 are ordinary injection molding grade resins, the resin viscosity of PA66 is 2.4-3.2, and the resin viscosity of PA6 is 2.2-3.0. The halogen-free flame retardant is OP1240 nitrogen-phosphorus compound flame retardant of Ryan Company, wherein the phosphorus content is 24-28%. The carbon fibers are m...

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Abstract

The invention relates to a high-strength carbon fiber reinforced halogen-free flame-retardant PA66 (Polyamide 66) composite material and a preparation method of the high-strength carbon fiber reinforced halogen-free flame-retardant PA66 composite material. The composite material comprises the following components: 20 to 60 parts of PA66, 15 to 50 parts of PA6, 10 to 25 parts of halogen-free flame retardant, 10 to 30 parts of carbon fiber, 2 to 12 parts of grafting type toughened modifier, 0.2 to 1 part of antioxidant, and 0.2 to 1 part of lubricating dispersant. The preparation method comprises the following steps in sequence: mixing all the raw materials mentioned above for 3 to 5 minutes by a high-speed mixer, except the carbon fiber; discharging to obtain the mixture; controlling the processing temperature of a twin-screw extruder to 230 to 250 DEG C, and controlling the revolutions of the screws to 180 to 600 rotation per minute; transferring the mixture into the twin-screw extruder; feeding the carbon fibers from the side; and extruding and pelleting, so as to obtain the high-strength carbon fiber reinforced halogen-free flame-retardant composite material. The high-strength carbon fiber reinforced halogen-free flame-retardant PA66 composite material is developed based on the special requirements on static resistance and flame retardant of the materials under the requirements of the electric appliances to the electromagnetic screening. Compared with the prior art, the high-strength carbon fiber reinforced halogen-free flame-retardant PA66 composite material has the advantages that the surface resistance is up to 10<3> to 10<6> ohms, the electromagnetic shielding performance and halogen-free environmental protection meet UL-94V0 standard, the mechanical strength is high, the appearance is nice, the comprehensive performance is outstanding, and the gap in the field of like products in China is filled.

Description

technical field [0001] The invention relates to the preparation of a halogen-free flame-retardant reinforced nylon composite material, in particular to a high-strength carbon fiber reinforced halogen-free flame-retardant PA66 composite material and a preparation method thereof. Background technique [0002] Polyamide has good mechanical strength and rigidity, good wear resistance and other advantages, and is widely used in automotive parts, mechanical parts, electronic and electrical fields, etc., becoming the first of the five engineering plastics, replacing traditional metal materials in many applications . In terms of antistatic modification of nylon materials, adding a low molecular weight antistatic agent is the most common antistatic measure. This modified material mainly uses the moisture adsorbed by the antistatic agent on the surface of the material to reduce the surface resistivity, so the durability is poor, and it is not durable. Washing is highly dependent on t...

Claims

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Application Information

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IPC IPC(8): C08L77/06C08L77/02C08K13/06C08K9/00C08K7/06C08J5/06
Inventor 张强郭建鹏金幸王尹杰
Owner SHANGHAI SUNNY
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