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(1) Lubrication
Internal lubrication: reduce the viscosity of the melt, improve the processing fluidity, reduce energy consumption (e. g. injection moulding, extrusion).
External lubrication: prevent the melt from adhering to the mould, reduce precipitation and scaling, and improve mould release.
(2) Surface modification
Improvement of gloss: make the surface of products smoother and brighter (e. g. PVC film, sheet).
Anti-scratch: added to engineering plastics (e. g. ABS, PC) to reduce surface scratches.
(3) Dispersing additives
Help pigments and fillers to disperse evenly (e. g. colour masterbatch, functional masterbatch).
(4) Anti-adhesion
Prevent film and sheet from sticking between layers (e. g. PE cling film, BOPP film).
(5) Abrasion resistance
Improve the abrasion resistance of engineering plastics (e. g. nylon, POM).
