Product information
Nature’s own fire retardant
This unique natural mixture of minerals is also known as HMH. It is a proven fire retardant filler in a wide range of polymers and rubbers such as polyethylene (PE), polypropylene (PP), polyvinyl chloride (PVC), ethylene-propylene diene monomer (EPDM) and nitrile rubber (NBR).
The combination gives a unique product in which specific properties can be optimised by selected mining and processing to fit a variety of applications.
Unique fire retardant properties
UltraCarb has a unique 3-stage fire-retardant mechanism. Whereas the classical endothermic flame retardant fillers act by releasing water in a single action process, our premium product works as follows:
- Water is released at temperatures of ~220°C (thermal decomposition)
- CO 2 release at temperatures of ~330°C
- At temperatures of ~560°C, particles accumulate at the surface of the burning polymer to form a stable cementitious char. This char inhibits the combustion process and thus the propagation of the fire through burning droplets.
The platy, high surface area particles of our halogen-free mineral provide excellent properties when you use these as a functional filler in polymers. The products’ high heat absorption protects polymers from rapid thermal degradation and the formation of combustible products.
UltraCarb standard grades
| Primary Hydromagnesite | Primary Huntite |
|---|---|
| LH3 | 1250 |
| LH15 | 1251 (stearate surface treated) |
| LH15C (stearate surface treated) | 1253 (proprietary surface treated) |
| LH15X (proprietary surface treated) | 1290 |
| 1291 (proprietary surface treated) |
UltraCarb packaging
Our UltraCarb product range is available in paper sacks, big bags or in bulk.
Stearate surface treatment improves wetting and reduces the agglomeration in the compound; proprietary surface treatments are beneficial as an external lubricant, act as a processing aid for extrusion and improve the LOI in EVA.
