This invention discloses a
cigarette filter rod and its preparation method, belonging to the field of cigarette auxiliary materials technology. Acetate
fiber is fed into a
molding machine, opened to form an acetate
fiber core, and particulate matter is incorporated into the outer side at a concentration of 1.6 mg / mm. The
cigarette filter rod adopts a 15mm+15mm binary
composite structure, with the 15mm segment being a pure acetate
fiber segment and the other 15mm segment incorporating particulate matter. Then, a laminating
machine is used to bond the inner wall of the outer paper layer and the inner protective layer together. Finally, the acetate fiber core is rolled,
cut, and dried to obtain the
cigarette filter rod. The addition of particulate matter in the cigarette filter rod significantly reduces the content of
heavy metals in inhaled
smoke without affecting the taste. The composite of the hydrophobic and breathable inner protective layer and the outer paper layer improves the hydrophobicity of the cigarette filter rod, making it less prone to
cracking. Furthermore, it effectively reduces the content of harmful substances and free radicals in the
smoke, making it
safer, and also improves the storage stability of the cigarette filter rod in humid and dark environments.