English
The functions of each raw material when extrude uPVC profiles
| Type | Effect |
| Calcium Carbonate | gloss, stiffness |
| Aluminum hydroxide | fire rating |
| Dolomite, Talcum | gloss, stiffness |
| Carbon black | weathering |
| Type | Effect |
| Antioxidants | stabilize PVC against degradation |
| UV-stabilizers | additional protection against sunlight |
| Optical brighteners | compensates absorption of blue light by the polymer |
| Flame retardants | rarely used, as PVC is flame retardant itself |
