What is PTFE Film?
PTFE (Polytetrafluoroethylene) film is a versatile material made from the polymerization of tetrafluoroethylene (TFE) monomers. Commonly known by the brand name Teflon, PTFE films are highly valued in many industries for their excellent chemical resistance, high-temperature tolerance, and non-stick properties. These thin sheets of PTFE have applications ranging from industrial manufacturing to food processing, medical devices, and electronics.
The inherent properties of PTFE, such as low friction, durability, and insulating characteristics, make it ideal for use in environments where conventional materials might degrade or fail. For example, PTFE films are used in sealing applications, electrical insulation, and as protective barriers against harsh chemicals. This article explores the various types of PTFE films, their distinct properties, and the applications that benefit from them.
Stay tuned as we delve deeper into the world of PTFE films, breaking down each classification and helping you understand how they are shaping industrial practices today.
Types of PTFE Films
PTFE films come in several varieties, each tailored to meet specific performance requirements. Depending on factors such as material modifications, fillers, and processing methods, PTFE films exhibit a range of properties that make them suitable for different industrial and commercial applications. Let’s explore the most common types of PTFE films in detail.
Specialized PTFE cutting film for PCB boards:
1. Performance index: Polytetrafluoroethylene (PTFE) has the feature of high temperature resistance, the working temperature reaches 260℃. In a wide frequency range of dielectric constant and dielectric loss are very low, and the penetration voltage, bulk resistivity and arc resistance are high, is the ideal material for PCB.
2. Industry Applications:
a. Compared with traditional 4G and other communications technologies, 5G needs to meet the full spectrum access, high-frequency band and even millimeter-wave transmission, high spectral efficiency of the three basic performance requirements, so the device raw materials also put forward higher performance and upgrade needs;
b. Because PTFE material has excellent electrical performance index, so it is very suitable for copper cladding board insulation layer.
| item | unit | standard | index |
| density | g/cm | GB/T 1033.1-2008 | 2.13-2.25 |
| tensile strength | MPa | GB/T 1040.3-2006 | ≥30 |
| elongation at break | % | GB/T 1040.3-2006 | ≥100 |
| dielectric strength | kv/mm | GB/T 1040.3-2006 | ≥100 |
| dielectric constant | / | 10G | 2-2.1 |
| loss tangent | / | 10G | <0.001 |
Specialized PTFE film for hydrogen energy batteries
Hydrogen fuel cell stacks consist of multiple monobloc cells laminated in series. The monomer cell is composed of bipolar plates with film electrodes (MEA-catalyst, proton exchange film, carbon paper/carbon cloth). A number of monomers embedded between the seals, the front and rear end plates after compression with a screw fastening tether, that is, constitute a fuel cell stack.
Polytetrafluoroethylene (PTFE) has stable chemical properties, excellent high-temperature resistance, and certain adhesive barrier and overlay function, so PTFE wide rotary cut film is chosen as the reaction carrier in the preparation of film electrode for hydrogen fuel cell.
PTFE film for LCD flat panel
1. Mainly used in the electronics industry, especially in the flat panel display industry, as a kind of consumables are widely used, such as TFT-LCD, COG, SMT, PDP and other processing and production process, its mechanism is to use ACF-Bonding hot press to drive IC with heat and pressure sticking in the glass, Teflon film can play a role in high temperature resistance, impact resistance, etc., to prevent the PCB segmentation and particles caused by glass breakage. It prevents the glass from breaking due to PCB segment difference and particles. This product is commonly used in flat panel display manufacturing (FPD), anisotropic conductive film (ACF) affixed (pre-pressing engineering section PreBonding) and COF/LCD connection, TCP/LCD connection and other processes (this pressure) to use this product can effectively prevent the conductive adhesive overflow and contamination of the substrate and the surrounding environment, and effectively protect the glass substrate purity.
2. Application : cell phone screens, computers, tablet PCs, LCD TVs and other equipment LCD display screen.
Technical index:
|
item |
unit |
standard |
index |
|
density |
g/cm |
|
2.13-2.25 |
|
tensile strength |
MPa |
QB/T 3267-1999 |
≥25-68 |
|
elongation at break |
% |
QB/T 3267-1999 |
≥50-350 |
|
hardness |
D |
|
50-55 |
|
surface resistance |
Ω |
|
1×1012 |
|
volume resistivity |
Ω.cm |
|
1×1018 |
PTFE wire and cable wrapping special film
1.Application:Wire and cable winding and wrapping, mainly used for electrical cable internal bunching, core to core shielding, outer layer insulation and its sintering.
2. Product list: B ultrasonic wire, audio wire, radio frequency wire, capacitor dielectric, wire insulation, busway, electrical instrumentation insulation, insulation sealing liner, winding sintered wire, electrical insulation.
Technical index:
|
item |
unit |
standard |
index |
|
density |
g/cm |
|
2.13-2.25 |
|
tensile strength |
MPa |
QB/T 3267-1999 |
≥30-45 |
|
elongation at break |
% |
QB/T 3267-1999 |
≥250-380 |
|
hardness |
D |
|
50-55 |
|
surface resistance |
Ω |
|
（白色）1×1012（黑色）1×106 |
|
volume resistivity |
Ω.cm |
|
1×1018 |
PTFE Release film
1. Use: Polytetrafluoroethylene (PTFE) release film has very good release properties, particularly uniform thickness, low coefficient of friction, stable chemical properties, excellent resistance to high/low temperature characteristics, with a certain degree of adhesive blocking, overlay function, good insulating properties, high flexural temperature and flexural life, electronic grade purity, high dielectric strength and other advantages. Commonly used in mold release materials.
2. Applications：Polytetrafluoroethylene (PTFE) release film is widely used in aerospace, printed circuit boards, flexible circuit boards, electrical and electronic, new energy, chemical, pharmaceutical and other fields.
How to Choose the Right PTFE Film
Selecting the right PTFE film for your application depends on various factors, including the specific requirements of the environment, the type of chemical exposure, and the temperature range.
Considerations for Selection
When choosing PTFE films, consider factors such as:
Temperature range: Ensure the film can withstand the operating temperature of your application.
Chemical exposure: Choose a film with the appropriate level of chemical resistance based on the substances the film will be exposed to.
Mechanical stress: Consider whether you need a flexible, modified PTFE film or a more rigid virgin or filled PTFE film.
By understanding the types and properties of PTFE films, you can make informed decisions that enhance performance and durability in your specific applications. Stay tuned as we continue to explore how PTFE films are shaping industrial practices today.
