In the food processing industry, silicone gaskets have become key components for equipment sealing due to their high temperature and corrosion resistance. However, their hygiene standards and cleaning specifications directly affect food safety and must strictly follow industry requirements.
Hygienic standard requirements
Food-grade silicone gaskets must be certified by FDA or LFGB to ensure that the material is non-toxic and has no migration risk. During the production process, the surface of the gasket must reach a food contact grade finish to avoid microbial residue. In addition, the porosity of the silicone gasket should be ≤0.5% to prevent grease or impurities from penetrating into the interior. Regularly test the content of heavy metals (lead, cadmium, etc.) to ensure compliance with the national standard GB 4806.11-2016.
Key points of cleaning specifications
Daily cleaning : Remove the silicone gasket immediately after use, wipe the surface with a neutral detergent (pH 6-8) and a soft cloth to avoid scratching the structure with a steel wool ball.
Deep disinfection: Treat with 75% alcohol or 100℃ steam for 10 minutes every week to kill potential pathogens. High temperature resistant silicone gaskets can withstand short-term high temperature sterilization at 150℃.
Dry storage: Place in a ventilated and dry place after cleaning to avoid aging caused by direct ultraviolet rays.
Precautions
Do not use chlorine-containing or strong acid cleaners to avoid destroying the molecular stability of silicone gaskets. If the gasket is found to be discolored, deformed or has decreased elasticity, it must be replaced immediately. It is recommended to conduct professional testing every 6 months to ensure that the silicone gasket continues to meet hygiene standards.
Through scientific management and standardized operation, silicone gaskets can not only extend the service life of equipment, but also build an important line of defense for food safety. Enterprises should establish a ledger system to fully record the cleaning, disinfection and replacement cycle of each batch of silicone gaskets to ensure production compliance.