Properties of (Calcined) Neuburg Siliceous Earth and advantages for users:
- low moisture, low moisture absorption
→ less effort for pre-drying, pre-drying may not be necessary, less polymer degration with hydophobic products
- high fineness, very low sieve residue, excellent dispersion properties, refractive index similar to polymers
→ good transparency, high light transmission in the visible range, very thin film thicknesses possible
- chemical/mineralogical composition
→ infrared barrier
- high brightness and color neutrality, morphology
→ supports pigment dispersion (spacer effect), potential pigment savings
- morphology and choice of different particle sizes
→ low coefficient of friction/anti-blocking, high gloss or matting, low or higher haze, improvement of film processing/manufacturing properties by incrasing modulus
- relatively low specific area
→ almost no adsorption of additives
- polymer-specific adaptation via functionalization
→ higher impect strength, scratch resistance, printability - low CO2-footprint
→ reduction of product carbon footprint of thermoplastic films