Foamed PVC Sheet Additives
Foamed PVC sheets are widely used in construction, decoration, and advertising thanks to their light weight, smooth surface, and insulating properties. Achieving these qualities requires a precise combination of specialized additives, each playing a critical role in the final performance
Calcium-zinc or lead stabilizers prevent thermal degradation and ensure long-term color stability during processing. Acrylic processing aids together with foam regulators provide proper fusion and melt strength, enabling a uniform cellular structure. The core of foamed sheet production is the foaming agent, which releases gas during processing to reduce density and create a consistent foam texture
To improve lubrication and surface quality, a blend of polymer waxes and external lubricants such as K175 is used, minimizing friction and giving the sheet a smooth finish. Fillers such as calcium carbonate not only lower production costs but also increase rigidity and dimensional stability. For enhanced whiteness and weather resistance, titanium dioxide (TiO₂) and, when needed, optical brighteners are incorporated. In some formulations, antioxidants and complementary stabilizers are added to improve durability and service life
Foamed PVC sheets are a clear example of how multiple additives must work in synergy to deliver a high-quality product