A kind of carbon fiber reinforced nylon composite material and preparation method thereof
A nylon composite material and carbon fiber technology, which is applied in the field of carbon fiber reinforced nylon composite materials, can solve the problems of affecting dimensional stability and processing fluidity, the decline of impact resistance, and the inability to achieve a rigid-tough balance, etc., to improve applicability and practicability , Improve impact resistance and ensure high rigidity
Active Publication Date: 2022-07-12
GUANGZHOU KINGFA CARBON FIBER NEW MATERIALS DEV
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Problems solved by technology
Carbon fiber itself is a high-modulus and high-strength material, and its addition will greatly increase the rigidity of the material, but the increase in the rigidity of the material will lead to a decrease in the impact resistance of the material, and the balance of rigidity and toughness cannot be achieved. The conventional method is to add various additives, but as we all know, increasing Additives will affect dimensional stability and processing fluidity
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Embodiment 1~8 and comparative example 1~10
[0045] Preparation of carbon fiber reinforced nylon composites:
[0046] S1. Mix the nylon resin and the auxiliary agent evenly, add it into the twin-screw extruder, connect the impregnation device at the die head of the extruder, the temperature of the extruder is 200~260℃, and the temperature of the die head is 260~280℃;
[0047] S2. Plasticized by twin-screw extruder, the high-temperature mixture melt is transported to the die, and the carbon fiber is transported to the die through the traction device for forced impregnation;
[0048] S3. The fully impregnated carbon fiber is pulled out, cooled and shaped, diced, and the particle length is 6~25mm;
[0049] S4. Put the above-mentioned particles into the injection molding machine, and set the injection molding process parameters to prepare the carbon fiber reinforced nylon composite material; the injection molding process parameters are shown in Table 1.
[0050] The specific formula (percent by weight) of table 1 embodiment...
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Abstract
The invention discloses a carbon fiber reinforced nylon composite material and a preparation method thereof. The carbon fiber reinforced nylon composite material includes the following components by weight percentage: nylon resin 50% to 75%; auxiliary agent 0% to 10%; carbon fiber 20% to 40%; in the carbon fiber reinforced nylon composite material, the carbon fiber retains the length Its distribution is calculated by weight percentage, including the following components: less than 1200um 15%~25%; 1200um~1800um 65%~75%; more than 1800um 5%~10%. The prepared carbon fiber reinforced nylon composite material has excellent impact resistance while enhancing rigidity, achieves the balance of rigidity and toughness, and increases the applicability and practicability of the nylon material.
Description
technical field [0001] The invention relates to the technical field of thermoplastic composite materials, in particular to a carbon fiber reinforced nylon composite material. Background technique [0002] Carbon fiber (CF for short) is a new type of fiber material with high strength and high modulus fiber with a carbon content of more than 95%. It is a microcrystalline graphite material obtained by carbonization and graphitization by stacking organic fibers such as flake graphite microcrystals along the fiber axial direction. Carbon fiber is "soft on the outside and rigid on the inside", which is lighter than metal aluminum, but stronger than steel, and has the characteristics of corrosion resistance and high modulus. It is an important material in national defense, military industry and civilian use. It not only has the inherent intrinsic properties of carbon materials, but also has the soft processability of textile fibers. It is a new generation of reinforcing fibers. ...
Claims
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IPC IPC(8): C08L77/02C08K13/04C08K7/06C08K3/04C08K5/20C08J5/04
CPCC08J5/042C08K3/04C08K5/20C08K7/06C08K13/04C08J2377/02C08K2201/003C08K2201/004C08L77/02
Inventor 黄险波陈大华范欣愉蒲颖孙雅杰李晓拓刘玲宋威
Owner GUANGZHOU KINGFA CARBON FIBER NEW MATERIALS DEV