The improvement of the structure of CFC preform is mainly related to the manufacturing technology.

In terms of the types of carbon fiber bundles used for the CFC, the carbon fiber bundles can be divided into 1K, 3K, 6K, 12K and other specifications.

In terms of the length of carbon fiber used for CFC, carbon fiber can be divided into short-cut carbon fiber, short fiber felt, long fiber felt, and non-woven fabric, etc.

In terms of the manufacturing process of CFC, carbon fiber can be divided into carbon cloth layer, 2D carbon fiber puncture with carbon cloth lamination, and the current popular needling carbon fiber preform. Its structure changes again with the different angle of needling.

In terms of the dimension of the CFC preforms, it can be divided into various structures, such as 1D, 2D, 2.5D and 3D. And the structure of the CFC has changed with the change of the felt-making technology in the textile industry.

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