Product Structure of PTFE PE Composite Foam

The PTFE/PE laminated series consists of a skived PTFE film laminated to PE foam and solid PE backings, available in a range of thicknesses.

This dual-layer design leverages the inert and durable characteristics of PTFE film with the cushioning properties of a foam backing to ensure both chemical protection and mechanical sealing.

Studies and reviews in packaging science and polymer materials consistently highlight PTFE as one of the most chemically inert and thermally durable polymers, making it well-suited for specialized sealing applications. When combined with a foam backing, PTFE-based composites not only improve sealing performance but also extend container life by preventing leaks and contamination. Compared to single-material liners, PTFE/foam laminates offer superior sealing reliability under mechanical stress and diverse environmental conditions.

TDS of PTFE Composite Film with LDPE Foam

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