Nepheline Syenite

Mineral: Nepheline Syenite

Nepheline syenite can be characterised by:

• High purity
• Absence of free crystalline silica (free of labelling)
• Brightness
• 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)

 

Basic properties

Property	Value	Unit
Hardness (Mohs)	6	[-]
Refractive index	1.51 – 1.53	[-]
Density	2.6	[kg/ dm3]

 

Products:

Product	Grade	D50 [µm]	Tappi [-]	OA [g/ 100 g]	pH [-]	Moisture [%]
HiFill N	800	7.6	88.7	30.0	10.4	0.10
	400	3.5	90.0	33.0	10.4	0.16
	300	2.6	90.5	35.0	10.5	0.18
	200	1.5	92.0	34	10.5	0.20

 

Production locations: Havelock (CA)

Application: Nepheline Syenite is used in a gel coat formulation to improve the abrasion resistance of the surface of the molded part.

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.

Functionalities: Durability