How It Works

• Ultra thin PTFE Layer
  • Non-stick surface: The ultra-low surface energy of PTFE makes it inherently resistant to bacterial adhesion and biofilm formation, reducing contamination risks.
  • Gas permeability: Ultra-thin PTFE film allows oxygen, carbon dioxide, and other gases to diffuse freely, while blocking liquid media and microorganisms.
  • Chemical inertness: Completely non-reactive with pharmaceutical formulations and culture media, ensuring reliable test conditions.
• Silicone Rubber Layer
  • Mechanical strength: Provides structural support, ensuring the composite film is easy to handle and securely seals onto culture dishes.
  • Elastic sealing: Adapts to lids, dish rims, or analytical instruments, maintaining tight containment during testing.
  • Light-blocking property: The black silicone is opaque, ensuring that the petri dishes are not affected by light exposure.

Key Advantages of PTFE Silicone Composite Films

• Accurate gas detection: Enables continuous and non-interfering monitoring of O₂ and CO₂ concentration in cultures.
• Enhanced contamination control: Prevents liquid leakage and bacterial adherence to sensors, preserving measurement integrity.
• Reliable sealing performance: Gas-permeable yet liquid-tight, providing dual protection in sensitive applications.
• Extended sensor life: Reduces fouling and maintenance caused by microbial residues.

Applications of PTFE film laminated silicone

• Microbial culture studies in pharmaceutical laboratories
• In-situ oxygen and carbon dioxide monitoring in drug testing
• Bioprocess control and fermentation systems
• Barrier films for packaging and drug delivery safety

Structure and Working Principle of PTFE Silicone Laminates

ESONE septa feature a two-layer composite construction:

TDS of PTFE/Silicone Septa Sealing Material

ESONE cap liner can also use PTFE film laminated with PE Foam

TDS of PTFE/PE Foam Septa Sealing Material