Molding Performance, Elevated – Built for Anti‑Yellowing Excellence

Visual consistency in molded silicone parts is not a luxury – it is a specification. And for components that face prolonged exposure to elevated temperatures, UV light, or aggressive cleaning agents, standard peroxide‑cured compounds often fall short. The IOTA-HTV311 series was engineered to close that gap, offering a high‑anti‑yellowing solution that does not force trade‑offs between clarity, hardness, or throughput.

Starting from a translucent base, this family of six grades (31130 to 31180) covers soft elastomeric to firm rubber‑like textures. Hardness increases systematically from 30 to 80 Shore A, while density ranges from 1.10 to 1.23 g/cm³ – a predictable profile that aids in mold design and shot weight calculation. Notably, the 31140 and 31150 grades achieve tensile strengths of 8.5 MPa, paired with elongations of 550 % and 450 % respectively, making them particularly suitable for dynamic seals and vibration‑damping mounts.

Beyond mechanical data, what sets this series apart is its processing robustness. The compound accepts standard peroxide addition (1.0 % of a 50 % bis‑peroxide) and cures efficiently under 175 °C compression molding. The 5‑minute cure cycle yields consistent physical properties, and the material’s excellent flow behavior ensures complete cavity filling even for intricate geometries – reducing rejections caused by short shots or knit lines.

All grades have passed ROHS, REACH, and FDA testing, which streamlines regulatory documentation for export orders or domestic compliance files. The 20‑kg carton packaging is convenient for both manual feeding and automated weighing systems, while the 18‑month shelf life (below 50 °C, unopened) supports lean inventory planning.

Choosing IOTA-HTV311 means choosing a material that respects your production schedule and your end‑user’s expectations. It delivers the anti‑yellowing effect you want, the mechanical range you need, and the regulatory peace of mind you deserve. Whether you are prototyping a new consumer device or scaling up a high‑volume automotive seal order, this series offers a proven, reliable foundation for success – part after part, batch after batch.