What is the difference between 1k carbon fiber and 3k carbon fiber?
Carbon fiber is a fiber material with a carbon content greater than 90%. It has similar characteristics to other carbon fiber materials, such as high-temperature resistance, acid resistance, corrosion resistance, electrical conductivity, and thermal conductivity. In addition, it has flexibility that other carbon materials do not have, and it can be made into various products after being combined with metal, resin, ceramics, etc. Carbon fiber models and specifications can be divided into 1K, 3K, 6K, 12K, 24K, etc. according to the number of K.
So which is better, 1K carbon fiber or 3k carbon fiber?
Let's first understand the meaning of the K number, which refers to the number of monofilaments in a bundle of carbon fibers. 1K means that there are 1000 monofilaments in a bundle of carbon fibers, and 3K means that there are 3000 filaments. Carbon fiber precursors are very slender, with a diameter of only one-twentieth that of hair, and are rarely used alone. Often, thousands of them are combined into a bundle, woven into cloth, or made into other processed parts such as pipes, called 1k (3k ) carbon fiber cloth, 1k (3k) carbon fiber tube, the K number has no direct relationship with the quality, but only the thickness of the texture on the visual sense.
The properties of 1K and 3K are the same. For example, the strength is 3.5GPa, the modulus is 220GPa, and the elongation is 1.6%. The difference is the linear density. Because the texture of 1K carbon fiber is denser, it is more complicated to manufacture and the price is higher. It is rare in the market and is mainly used for surface decoration. 3K has a wide range of applications. It can not only cover auto parts and gas cylinders for decoration, but also make high-speed rail components, manipulators, and transmission shafts to achieve lightweight.