Thermosetting Plastics
Mineral Fillers for Thermoset Composites
Overview
Thermosetting plastics — including phenol formaldehyde, urea formaldehyde, melamine formaldehyde, and unsaturated polyester resins — rely on mineral fillers for mechanical performance, cost efficiency, and controlled flow in compression and transfer molding applications. Raviraj Minerals supplies both reinforcing and extending mineral grades for thermoset compounders.
Calcium Carbonate
Calcium carbonate is used as an extending filler in phenolic, melamine, and polyester thermoset molding compounds. It improves flow, reduces shrinkage during cure, and lowers raw material cost without compromising surface quality or dielectric properties of the finished part.
- Improves mold flow in compression and transfer molding
- Reduces cure shrinkage and warpage in thermoset parts
- Lowers formulation cost without compromising surface quality
- Compatible with phenolic, melamine, urea formaldehyde, and polyester systems
- Provides smooth surface finish in compression-molded articles
Talc Powder
Talc in thermoset molding compounds improves dimensional stability, stiffness, and heat resistance of cured parts. Its plate-like particles act as a barrier to moisture and gas, improving the dielectric properties and weathering resistance of thermoset electrical components.
- Improves dimensional stability and stiffness of thermoset parts
- Enhances heat resistance for electrical switchgear and industrial parts
- Acts as a moisture barrier — improves dielectric performance
- Suitable for phenolic compression molding compounds
Need a custom mineral solution?
Our technical team can help you identify the right mineral grades for your Thermosetting Plastics application.
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