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

Advantages

This film is characterized as a relaxed amorphous material, allowing it to be uniformly stretched in all directions without exhibiting stress whitening, which makes it an effective barrier against gases and liquids. It boasts a high purity level, is non-porous, and free from pinholes. Our Cast Films provide excellent drapability and conformability, along with outstanding dielectric properties. ESONE offers these films in both clear (unpigmented) and colored options, including red, blue, white, yellow, and tan. Additionally, surfaces suitable for cementing and bonding are available.

Specification of PTFE Casting Film

Our PTFE Casting Film is available in a range of thicknesses from 0.005 to 0.127mm (0.25 to 5mil) (5um to 127um) and can be produced in widths up to 60 inches (1524 mm). This variety in thickness and width allows for tailored solutions to meet specific application requirements.

Filler: 1. No filler. 2. Silica. 3. Others

Coating：1. No coating. 2. PFA coating. 3. FEP coating

Color: Half Transparent, Red, Blue, Black, Green, Copper and others

Applications of Cast PTFE Film

ESONE’s PTFE Casting Film is ideal for use in various industries where chemical resistance, low friction, and thermal stability are critical. Common applications include:

• Chemical Processing: Used in equipment and containers that handle aggressive chemicals.
• Food Processing: The high purity and non-porous nature make it safe for food contact applications.
• Electrical Insulation: Due to its excellent dielectric properties, it is suitable for insulating electrical components.
• Vacuum Bagging mold release: suitable for the upper end temperatures required in the fabrication of high performance composites for the aerospace industry.
• Outdoor Applications: Its durability and resistance to environmental factors make it suitable for outdoor use where exposure to the elements is a concern.