Plastic and Rubber Applications

Optisil plastic and rubber application grades aredesigned 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.