Mineral: Nepheline Syenite
Nepheline syenite can be characterised by:
- High purity
- Absence of free crystalline silica (free of labelling)
- Relatively low refractive index, making it a transparent filler in various binders
- High inertness in various media
- Easy wetting
- Transparency for UV-radiation (i.e. suitable for UV-curing processes)
|Refractive index||1.51 – 1.53||[-]|
[g/ 100 g]
Production locations: Havelock (CA)
Nepheline syenite will improve the mechanical properties of the plastic part and can make its surface harder therefore improving the durability.
Advantage over quartz and cristobalite and certain feldspar grades: nepheline syenite grades are free of labelling, and can therefore be used as an alternative when labelled grades of other mineral fillers are no longer allowed or wanted.