Halogen‑Free Flame Retardancy Meets Process Stability – Discover the IOTA‑HTV 325 Family
When your application demands both fire protection and production efficiency, the IOTA‑HTV 325 series offers a practical solution. This family of solid silicone rubbers carries UL94 V‑0 certification at 1 mm thickness – a widely recognized benchmark for vertical burn testing – giving design engineers a solid foundation for compliance documentation. Importantly, the flame retardant system is halogen‑free, aligning with modern environmental and safety expectations without compromising curing speed or mold release.
The series covers a versatile hardness spectrum: from the soft 40 Shore A (32540) for gaskets and vibration dampers, up to 80 Shore A (32580) for robust supports or insulators. The white grade, 32550W, provides an aesthetic option for visible or light‑colored end products. Each grade exhibits reliable physical properties – tensile strength from 4.5 to 7.0 MPa, elongation from 170% to 400%, and tear resistance up to 20 kN/m – ensuring that parts survive assembly, thermal cycling, and long‑term service.
Processors will appreciate the straightforward cure schedule: 0.5% double‑2,5 peroxide, 175°C, 5 minutes, and 15 MPa compression molding. This standard condition produces reproducible results across batches, reducing trial‑and‑error adjustments. The material’s density (1.38–1.52 g/cm³) remains consistent, aiding in weight calculations for automated metering systems.
Storage is simple – keep cartons unopened in a cool, dry place away from direct sunlight. While the labeled shelf life is 12 months, we suggest using the compound within 6 months for optimal mixing efficiency. If older stock is used, extended mixing time may restore workability, but always confirm final property data. For new projects, our application engineers are ready to support your qualification process – from sample testing to scale‑up.