Plastic and Rubber Applications
Optisil plastic and rubber application grades are designed to improve mechanical strength, rigidity and resistance to abrasion. It is used as rheological modifier and functional filler. With cost saving solution and high performance properties, Optisil is the best white reinforcing pigment for plastic and rubber applications.
In plastics, smooth surfaces, dimensional stability, electrical-chemical resistance, improved impact and tensile strength, good processability and moreover are obtained by using Optisil plastic grades. Thanks to its structure, Optisil ensures high degree of hydrophobicity.
Optisil kaolin clays are commonly used in thermoplastic elastomers and rubber insulation on high voltage lines. One of the most uses of kaolin is in PVC cables where improved electrical properties are indispensable.
Chemical Specifacation (%)
| SiO2 | Al2O3 | Fe2O3 | TiO2 | CaO | Na2 | K2O | MgO |
| 52 ± 2 | 45 ± 2 | 0.5 | 0.8 | 0.5 | 0.2 | 0.1 | 0.2 |
Key benefits
Rubber: Insulators, wire-cable, tires, seals, gaskets, o-rings, hose belts
Plastic: PVC flooring and cable, nylon, polyolefins, polypropylen, copolymers, LDPE, EPDM
- High mechanical strength
- High brightness
- Resistance to abrasion
- Smoothness
- High processability
- Low vapour and gas permeability
- Fine particle size
- Reinforce rubber matrix
- Saves electricity
- Saves electricity
- Useful lifespan
- Excellent TiO extender
- Good hydrophobicity
Typical properties
| Items | Optisil PR 50 | Optisil PR 80 | Optisil PR 90 |
| Brightness (R457, min, %) | 90 | 92 | 93 |
| Particle size (≤2μ, %) | 50±5 | 80±2 | 88±2 |
| Residue on 325 mesh (%) | ≤ 0.05 | ≤ 0.003 | ≤ 0.001 |
| Moisture (%) | ≤ 0.5 | ≤ 0.5 | ≤ 0.5 |
| Oil absorption (g/100g) | 50±5 | 60±5 | 60±5 |
| pH | 6.0-8.0 | 6.0-8.0 | 6.0-8.0 |
| Density (g/cm3) | 2.7 | 2.7 | 2.7 |
Packaging
25 kgs multi layer paper/PE bag, 1000 kgs big bag.
Storage
Store in cool, dry and well ventilated areas. For more details, please refer to the material safety data sheet.