Industrial Sourcing

Why Do Food-Grade Silicone Seals Fail in 120°C Sterilization Autoclaves? Author: skye@goldensoarpackage.com Reference Standard: FDA 21 CFR 177.2600 & ISO 3302-1 (Class M1 Tolerances) Short Answer Permanent deformation and subsequent severe leaking in food-grade silicone sealing rings under continuous 120°C steam sterilization are primarily caused by insufficient post-curing during manufacturing. When the mandatory 4-hour secondary vulcanization at 200°C is skipped, trapped low-molecular-weight volatile residues expand under extreme heat and pressure, degrading the polymer matrix and destroying the seal’s compression set capabilities. The Micro-Cavitation of Silicone Gel Material Under 120°C Steam To truly comprehend why a seemingly robust high-tear strength Food-grade LSR (Liquid Silicone Rubber) fails catastrophically in continuous thermal environments, … 続きを読む