Abstract: The carbon fiber accounted for more than 60% in the raw materials cost of carbon fiber composite core. It is an effective way to cost down by replacing the 12K T700 grade carbon fiber with domestic fibers. This pater selected three domestic 12K T700 grade PAN-based carbon fiber to make carbon fiber composite core, for which the main performance can meet the standard requirements. These domestic carbon fibers can replace the imported Toray T700S carbon fiber with only 70%~80% of the price, which is beneficial to the popularization and application of carbon fiber composite core conductor.

Key words: carbon fiber composite core conductor, domestic T700 grade carbon fiber