Fiber and film industry

Filtration of polyacrylic for the production of carbon fiber precursors

Manufacturing High-Quality Carbon Fiber

A PAN precursor (polyacrylonitrile precursor) is the essential raw material for the production of high-quality carbon fibers.

It is a polymer fiber produced through spinning processes that is converted into high-strength carbon fibers during the subsequent process steps of stabilization (oxidation) and carbonization.

To achieve the required high tensile strength, stiffness, and process reliability, PAN precursor fibers must be free of even the finest impurities and gel particles.

The LENZING ViscoFil backwash filter system is ideally suited for filtering the PAN spinning dope, thereby ensuring the highest quality of the final product.

Spinneret service life and final product quality.

During the production of PAN precursor fibers, blockages in the spinnerets regularly require manual intervention. When changing filters and spinnerets, employees are exposed to process chemicals, while production interruptions reduce equipment availability.

In addition, insufficiently removed fine particles and gels cause quality defects in the PAN precursor fibers. These defects adversely affect the mechanical properties and quality of the carbon fibers produced in subsequent processes.

Continuous operation, closed system.

Reliable filtration of impurities and gel particles from the PAN spinning solution using an automatic backwash filter system improves the quality of the final product and maximizes the service life of the spinnerets.

The long service life of the filter media enables continuous plant operation, reduces production downtime, and minimizes manual interventions that expose employees to process chemicals.

The solution: LENZING ViscoFil