Sazhuoke Wet Spinning Machine Series Carbon Fiber Precursor PAN Fiber Synthesis Small Experimental Equipment

Carbon fiber is widely used in fields such as aerospace, new energy, and advanced manufacturing due to its high strength, high modulus, and high temperature resistance. As the core precursor of carbon fiber, the production of polyacrylonitrile (PAN) fiberThe preparation process directly determines the performance of the final carbon fiber.

Wet spinning is one of the mainstream technologies for preparing PAN fibers, which forms a highly oriented and low defect fiber structure through solvent dissolution, phase separation molding, and multi-stage post-treatment steps, laying the foundation for subsequent pre oxidation and carbonization.

The following is a brief introduction to the wet spinning process:

Wet spinning focuses on solution phase transition and achieves fiber shaping through diffusion exchange between solvents and non solvents. The main process includes:

1. Spinning solution preparation: PAN polymer is dissolved in a specific solvent to form a uniform spinning solution;

2. Spinning molding: The solution is extruded through the spinneret and enters the coagulation bath, where it solidifies into primary fibers;

3. Post treatment process: including steps such as water washing, stretching, drying, etc., to optimize fiber structure and properties;

4. Solvent recycling: Recycling the coagulation bath solvent to enhance the environmental friendliness of the process.