Calcium Carbonates significantly increase the rigidity of polystyrene, allowing a significant reduction in sheet size while maintaining the top load.
The high thermal conductivity of Niğtaş Calcium Carbonate products accelerates extrusion, sheet and thermoforming processes. Hard calcium carbonate particles provide the advantages of lower shrinkage and improved forming. The addition of calcium carbonate to the polymer matrix reduces the amount of viscoelastic material in the formulation. Thus, it reduces typical viscoelastic behaviors such as mold swelling and sharkskin.
In general, the modification of thermoplastics with calcium carbonate offers the opportunity to significantly improve production performance, depending on machine equipment and processing conditions.
- PS Sheet
- XPS Sheet
- Disposable cups, plates

| Fields of Applications | Products |
| PS Sheet | Nigtas 95k – GLS 926 – Nigtas 65K- Nigtas 1FK – Nigtas 1K – Nigtas 2K – Nigtas 3K – Nigtas 120 – Nigtas 95 |
| XPS Sheet | Nigtas 65K – Nigtas 1FK – Nigtas 1K – Nigtas 2K – Nigtas 3K – Nigtas 120 – Nigtas 95 |
| Disposable cups, plates | Nigtas 1 – Nigtas 2 – Nigtas 3 – Nigtas 5 |



