Käyttölisäaineisiin

Käyttölisäaineisiin, known in English as functional additives or processing aids, are substances intentionally added to materials, typically plastics or polymers, during their manufacturing process. Their primary purpose is to improve the processability of the material or to enhance the properties of the final product. These additives are not usually intended to remain as a permanent part of the finished material's structure or significantly alter its fundamental composition but rather to facilitate production or impart temporary beneficial characteristics.

Common examples of käyttöliisäaineisiin include lubricants, which reduce friction between polymer chains and processing equipment, making extrusion or molding smoother. Anti-blocking agents prevent plastic films from sticking together, while slip agents reduce the coefficient of friction on the surface of plastic products. Plasticizers, though sometimes considered a permanent additive, can also function as processing aids by increasing flexibility and reducing melt viscosity. Other categories might include anti-static agents or mold release agents, all designed to aid in the manufacturing steps. The selection and amount of käyttöliisäaineisiin used depend heavily on the specific polymer, the processing method, and the desired outcome for the end product. They are crucial for efficient and effective manufacturing in many industries.