o produce fiberglass (FRP) gratings, fillers are often used to enhance certain properties of the final product, such as mechanical strength, dimensional stability, cost efficiency, and thermal resistance. The type and amount of filler depend on the manufacturing process and performance requirements.
Common Types of Fillers Used in Fiberglass Gratings:
1. Calcium Carbonate (CaCO₃)
- Form: Powder
- Purpose:
- Reduces raw material costs
- Improves surface finish
- Enhances dimensional stability
- Usage: Commonly used in polyester resin systems for general-purpose FRP gratings
2. Aluminum Trihydrate (ATH – Al(OH)₃)
- Form: Fine powder
- Purpose:
- Acts as a flame retardant
- Reduces smoke emission
- Improves fire resistance (used in fire-rated FRP products)
- Usage: Especially useful in applications requiring low flammability, such as public buildings or transportation infrastructure
| Filler Type | Main Function | Typical Use Case |
|---|---|---|
| Calcium Carbonate | Cost reduction, surface finish | General purpose FRP gratings |
| Aluminum Trihydrate | Flame retardant, smoke suppression | Fire-resistant gratings |