Shenzhen Turing New Material Co., Ltd.
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Product Details
Chopped carbon fibers are made by cutting continuous carbon fiber filaments into short pieces using a fiber cutting machine. Their basic properties mainly depend on the properties of their raw material—continuous carbon fiber filaments. Short fibers have advantages such as uniform dispersion, diverse feeding methods, and simple processes, and can be applied in special fields where continuous carbon fiber filaments are not suitable.
Origin
In 1880, American inventor Thomas Edison first carbonized bamboo fibers into filaments to serve as the luminous filaments in electric light bulbs, pioneering the use of carbon fiber (Carbon Fiber, abbreviated as CF). The pioneer in using carbon fiber as a structural material was represented by an American company. In 1959, using pitch fibers as raw material, after carbonization at a high temperature of several thousand degrees, they obtained carbon fiber with an elastic modulus of approximately 40 GPa and a strength of about 0.7 GPa. In 1965, the company extended the same raw material at a high temperature of 3000°C to develop filamentous high-elastic graphitized fiber, with an elastic modulus of about 500 GPa and a strength of approximately 2.8 GPa.
In 1961, Dr. Otomo Shindo from a Japanese research institute, using Polyacrylonitrile (abbreviated as PAN) as raw material, obtained carbon fiber with an elastic modulus of 160 GPa and a strength of 0.7 GPa after oxidation and carbonization processes at several thousand degrees.
In 1962, the Japanese company Nippon Carbon Co. produced low modulus (L.M.) carbon fiber using PAN as raw material. They also developed high-strength CF using PAN fiber as raw material, with an elastic modulus of approximately 230 GPa and a strength of about 2.8 GPa, and by 1966, they achieved a monthly mass production scale of 1 ton. At the same time, they also developed high elastic modulus CF with a carbonization temperature above 2000°C, having an elastic modulus of about 400 GPa and a strength of approximately 2.0 GPa. The production of PAN-based carbon fiber reached 6,500 tons per year in 1992 and exceeded 10,000 tons per year by 2000.
Although the demand for carbon fiber gradually expanded, after the end of the Cold War in 1991, the usage in military applications shrank. Additionally, due to the economic depression, the balance between supply and demand was lost, and the industry was impacted. However, the production of Boeing's new B777 aircraft, coupled with the expansion of applications in civil engineering, construction, automobiles, and composite materials, led to a gradual and steady growth of the carbon fiber industry.
Characteristics
Carbon fiber is a fibrous carbon material. It is a new type of material with many valuable electrical, thermal and mechanical properties: it has higher strength than steel, lower density than aluminum, stronger corrosion resistance than stainless steel, higher temperature resistance than heat-resistant steel, and can conduct electricity like copper. Carbon fiber is mainly made into carbon fiber-reinforced plastic, a kind of composite material, for application.
Chopped carbon fiber
Each carbon fiber is composed of thousands of smaller carbon fibers, with a diameter of approximately 5μm to 8μm. At the atomic level, carbon fiber is very similar to graphite, consisting of layers of carbon atoms arranged in a hexagonal pattern. The difference between carbon fiber and graphite lies in the connection between the layers. Graphite has a crystalline structure with loose connections between layers, while carbon fiber does not have a crystalline structure and the connections between layers are irregular, which can prevent slipping and enhance the strength of the material.
The density of general carbon fiber is 1750kg/m³. It has high thermal conductivity but low electrical conductivity, and its specific heat capacity is also lower than that of copper. When heated, carbon fiber becomes thicker and shorter. Although the natural color of carbon fiber is black, scientists can dye it into different colors.
Applications
The main application fields of chopped carbon fibers include:
Military industry: Used in the manufacturing of rockets, missiles, radars, spacecraft shells, motor boats, industrial robots, automobile leaf springs, drive shafts, etc.
Construction: Carbon fiber reinforced cement, conductive coatings, anti-static floors, etc.;
Electrothermal field: Conductive paper, electric heating plates, conductive surface felt, needle-punched felt, conductive mats, etc.;
Shielding materials: manufacturing shielding smoke, shielding curtain walls, etc.;
Thermal insulation materials: carbon fiber reinforced refractory blanks and bricks, carbon fiber reinforced ceramics, etc.;
New energy field: wind power generation, friction materials, fuel cell electrodes, etc.
Sports and leisure products: golf clubs, fishing gear, tennis rackets, badminton rackets, arrow shafts, bicycles, rowing boats, etc.
Reinforced modified plastics: nylon (PA), polypropylene (PP), polycarbonate (PC), phenolic (PF), polytetrafluoroethylene (PTFE), polyimide (PI), etc.;
Body substitute materials: artificial ligaments, etc.
Carbon fiber has the flexibility of ordinary textiles and can be processed into fabrics, felts, mats, tapes, papers and other materials. In traditional use, except for being used as thermal insulation materials, carbon fiber is generally not used alone. It is mostly added as a reinforcing material to resins, metals, ceramics, concrete and other materials to form composite materials. Carbon fiber-reinforced composite materials can be used as aircraft structural materials, electromagnetic shielding and static elimination materials, body substitute materials such as artificial ligaments, as well as in the manufacture of rocket casings, motor boats, industrial robots, automobile leaf springs and drive shafts, etc.
From 1994 to around 2002, with the academic research from short-fiber carbon fiber to long-fiber carbon fiber, the technology and products of using carbon fiber to make heating materials gradually entered the military and civilian fields. At present, there are many cases of using long-fiber carbon fiber to make State Grid cables in China. At the same time, carbon fiber heating products, carbon fiber heating products, and carbon fiber far-infrared physiotherapy products are also entering more and more ordinary people's homes.
Chopped carbon fiberMain technical indicators:
Carbon content: greater than 95%
Tensile strength: 3500MPa
Tensile modulus: 228GPa
Density: 1.75g/cm³
Resistivity: 1.0-1.6Ωcm
Fiber diameter: 7μm
Cross-sectional shape: circular
Bulk density: 0.4g/cm³
Standard length: 1mm-100mm
Resin-containing type / Resin-free type
Factory displa
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Notes on Receiving Goods
All products in our store are strictly inspected by professionals before being shipped. Please make sure to inspect the goods before signing the express delivery form. If the courier does not agree to inspect the goods first before signing, you should unpack and check the goods immediately after signing while the courier is present. If there is any problem, please contact us immediately through the sender's phone number on the express delivery form. A normal signature confirmation (including signatures by family members, doormen, etc.) will be regarded as the goods being intact. We will not compensate for any damages, missing items, etc. reported after that.
Return and Exchange Service
The return and exchange service period of our store is within 7 days, calculated based on the time when the customer signs for the package on the courier receipt. If customers find issues such as quality problems or missing items when inspecting the goods during courier delivery, we will bear the round-trip shipping costs for unconditional returns and exchanges. If you purchase a product that is not suitable for you or that you do not like, you can return or exchange it provided that the product and its accessories are brand new and do not affect secondary sales. For returns or exchanges caused by personal reasons, the round-trip shipping costs shall be borne by you. If you need to return or exchange the goods, please leave the seller's Wangwang ID in the returned package for verification, to facilitate faster and more effective processing of related matters for you.
After-sales Service
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