Post-machining Method Of Carbon Fiber

After the pre-oxidation and graphitization, the carbon fibers are subjected to post-treatment, including surface treatment, hydrogen cyanide treatment and sizing packaging. Among them, surface treatment is the most important. Its purpose is to remove surface impurities, form micropores or etch grooves on the fiber surface, and enhance performance. Let’s talk about its post-machining method.  

After the above steps are completed, the packaging is completed according to the customer’s requirements. Post-machining is not a critical step in the production of carbon fiber, but if done well, it can add a lot of color to the product.

Surface Treatment

There are three types of surface treatment: gas phase oxidation method, liquid phase oxidation method and electrolytic oxidation method. The gas phase oxidation method is carried out in a tube furnace, and the temperature is controlled at 350°C to 600°C. When used properly, its shear strength can more than double.

However, this method is difficult to implement, so it is rarely used; the liquid-phase oxidants commonly used in liquid-phase oxidation are HNO3 and H2SO4. Treating with 15% sodium chlorocarbonate 40% sulfuric acid solution at the reflux temperature of the liquid for 10min can greatly improve the strength; the electrolytic oxidation method is to put carbon fiber at the anode and graphite at the cathode, and add nitric acid, sulfuric acid, sodium hydroxide and other electrolytic solutions , this method is simple and easy for industrial operation.

Hydrogen Cyanide Treatment

When carbon fiber is pyrolyzed at high temperature, it may produce highly toxic hydrogen cyanide, which is harmful to human body. It is usually absorbed by catalytic decomposition method, combustion method and copper sulfate absorption method.  

Sizing

Sizing can make the carbon fiber play a protective role in winding, weaving and other operating processes, and prevent the occurrence of fluffing and splitting. The glue can choose gelatin. In order to make the performance of carbon fiber more superior, toughening agents, Penetrant, softener and other reagents.  

China Be-cu Prototype Material Technology Co., Ltd. specializes in the production of carbon fiber products. Every detail is strictly controlled. Welcome to order. After the pre-oxidation and graphitization, the carbon fibers are subjected to post-treatment, including surface treatment, hydrogen cyanide treatment and sizing packaging. Among them, surface treatment is the most important. Its purpose is to remove surface impurities, form micro manufacturing pores or etch grooves on the fiber surface, and enhance performance. Let’s talk about its post-machining method.

ISO 9001 certified. BE-CU Prototype Offering CNC machining carbon fiber and other manufacturing services for carbon fiber marterial. Various capabilities include notching, labeling, drilling carbon fiber, grinding, laser cutting carbon fiber, finishing, plating, marking, CNC milling carbon fiber and turning carbon fiber.We stock high quality 3k carbon fiber sheet in a variety of thickness, types and finish. Its a great material used in applications where light weight and strength are needed such as drones. Unlike other workshops, we have no min order and are often filling orders with a single part. We also don’t make you pay for the full sheet and you only get charged for what is used. With a large selection of material, you should find everything you need to make your project come to life. We are also able to handle larger production runs and provide a competitive pricing. If we don’t have the material or finish you require, we are more the willing to look at bringing it in for you.

What Is Carbon Fiber?Carbon fiber is made of polyacrylonitrile (PAN) (or pitch, viscose) and other organic fibers by carbonization (removal of most elements except carbon) by pyrolysis method under inert gas at high temperature above 1,000 °C. Inorganic polymer fibers with a carbon content of more than 90%.