ATH
Mineral: ATH
ATH (aluminium tri hydrate, chemical formula Al(OH)3) is an intermediate product of aluminium production, characterised by:
- High purity
- High whiteness
- Relatively low density of 2.4g/cm3 compared to other mineral fillers, which are typically at 2.7g/cm3
- Medium Mohs hardness of 3
- Decomposition around 200°C, releasing water
Basic properties
| Property | Value | Unit |
| Moisture | < 0.4 | [%] |
| pH | 9 | [-] |
| Hardness (Mohs) | 3 | [-] |
| Refractive index | 1.57 | [-] |
| Electrical conductivity | 60 | [µS/cm] |
| L.O.I. | 34.5 | [%] |
| Density | 2.4 | [kg/ dm3] |
Application specific Products:
| Product | Grade | D50
[µm] |
OA
[g/ 100 g] |
| Portaflame SG | 63 | 23 | 18 |
| 200E | 90 | 10 | |
| 220E | 120 | 9 | |
| 55 LV | 15 | 16 | |
| 100 LV | 33 | 11 |
Production location(s): Maastricht (NL), Poviglio (IT), Balaruc (FR), Brassington (UK) and Geertruidenberg (NL).
Application: used in aluminium sandwich panels to make these flame retardant
Functionality: Safety.
In case of using Polyethylene as core material, the use of Portaflame SG63 or Portaflame SG100LV is advised.
The difference between the Portaflame SG63 and the Portaflame SG100LV here is the lower oil absorption value of the Portaflame SG100LV (11 g/100g) compared to the oil absorption of the Portaflame SG63 (18 g/100g), mainly due to the particle size distribution (PSD).
The PSD of the Portaflame SG63 is quite narrow with a D-50 of approx. 20 um and a topcut of approx. 60 um, whereas the PSD of the Portaflame SG100LV is more flat, with a D-50 of approx. 33 um and a topcut of 125 um. The lower Oil Absorption value of the ATH-filler will have an effect on the compounding viscosity (lower) and the final MFI (higher) of the PE-composite.
Safety
