How to prevent medical silicone O-rings from cracking after high-temperature sterilization?

In medical devices, silicone O-rings undertake the core sealing function to prevent liquid and gas leakage. High-temperature sterilization (steam sterilization, hot air sterilization) is an essential procedure to ensure the biosafety of medical supplies.

Many medical institutions are troubled by the cracking and deformation of silicone O-rings after repeated high-temperature sterilization. Such defects not only compromise the sealing performance of medical equipment, but also bring potential medical safety risks. Fortunately, this problem can be effectively solved by choosing high-quality customized medical-grade silicone O-rings.

Premium medical silicone O-rings are manufactured from medical-grade molded silicone rubber. This formula is free of low-molecular volatile substances. It resists molecular chain breakage under repeated sterilization cycles, including 134°C steam sterilization and 180°C hot air sterilization, maintaining stable elasticity and long-term sealing performance.

Meanwhile, the whole production process strictly complies with ISO 10993 biocompatibility standards. With zero vulcanizing agent residue and passing odor-free testing, these O-rings avoid secondary pollution to the medical environment and fully meet clinical application requirements.

In terms of production technology, we adopt secondary vulcanization at 180℃ for 2 hours to thoroughly remove low-molecular substances inside the silicone parts, greatly improving anti-aging capability.

The cross-section design of sealing O-rings must perfectly match the grooves of medical devices. This prevents uneven stress caused by dimensional deviations during high-temperature sterilization, which is a key factor in avoiding cracks.

Before delivery, all products undergo multiple simulated high-temperature sterilization tests. They can withstand up to 500 cycles of repeated sterilization without defects such as cracking, deformation or thermal expansion.

The key to crack-resistant performance after high-temperature sterilization lies in medical-grade raw materials and rigorous process control.

If you are a medical device manufacturer or medical institution in need of silicone sealing parts resistant to repeated high-temperature sterilization, please feel free to contact us via email or phone.

Kindly advise your sterilization method, equipment model and dimensional requirements. We will offer customized solutions with complete medical certifications and support free sample testing, helping you fully resolve O-ring cracking issues.