Author: Site Editor Publish Time: 2026-01-13 Origin: Site
With the widespread application of functional film materials in the electronics, optoelectronics, and composite materials industries, release film, as a key auxiliary material, has a direct impact on product manufacturing efficiency and final quality. PET and PE release films are currently the two most widely used types. This article will provide an in-depth comparison of various aspects, including physical properties, thermal stability, processing performance, and applicable scenarios, to provide a scientific reference for companies when selecting release liners.
To purchase or wholesale high-quality PET or PE release films, please contact professional release paper supplier Revolve CF at: HarveyXu@revolve-cf.com or: https://www.revolve-cf.com.
PET (polyethylene terephthalate): A thermoplastic polyester with excellent mechanical strength, dimensional stability, and high-temperature resistance. PE (Polyethylene): Divided into LDPE, HDPE, and LLDPE, it offers excellent flexibility and ease of processing, but relatively low heat resistance and strength.
PET raw material costs are higher than PE, but production capacity is stable.
PE's production process is mature, resulting in lower costs and suitable for high-volume, general-purpose applications.
PET is difficult to degrade but has a high recyclability rate.
PE is easier to recycle, but is more susceptible to aging and brittleness in film form.
The following table summarizes the key physical and processing properties of PET and PE release films:
| Performance Index | PET Release Film | PE Release Film |
| Tensile Strength | High, approximately >150 MPa | Medium, approximately 10–30 MPa |
| Thermal Stability | High, temperature resistant up to 150°C or above | Low to Medium, approximately 70–100°C |
| Flatness | Excellent, suitable for high-speed die-cutting | Average, prone to curling |
| Thickness Uniformity | Very good, error <±1μm | Average, with large error |
| Peel Force Stability | Stable, suitable for precision die-cutting | Slightly weak, suitable for medium to low peel force requirements |
| Transparency | Highly transparent | Can range from transparent to translucent |
The above data is for reference only. Actual parameters vary depending on the film type and coating. For specific product specifications and technical information, please contact professional release paper supplier Revolve CF.
Precision die-cutting (e.g., mobile phones, tablets, camera modules)
Carbon fiber prepreg lamination
Optical electronics (e.g., LCD lamination)
Hot press molding and lamination
Tape release substrate (e.g., double-sided tape)
Label and self-adhesive printing industry
Wire and cable coating
Release layer for building waterproofing materials
In carbon fiber prepreg and molding processes, PET release film is more suitable for hot pressing due to its heat resistance and dimensional stability. PE release film, on the other hand, is often used in the medium- and low-temperature pre-layup phase as a protective and insulating layer.
PET release film is typically coated with silicone oil, which allows for precise control of coating uniformity and release strength, making it suitable for demanding coating or lamination processes. PE release film can also be coated, but due to the substrate's low melting point, process control is more difficult, and deformation and uneven coating are prone to occur.
PET release film offers excellent stiffness and flatness, making it suitable for high-speed die-cutting and automated laminating systems.
Due to its soft nature, die-cutting process parameters must be adjusted to avoid lamination deviations or wrinkles.
PET material has excellent moisture resistance and is less susceptible to aging and deformation during long-term storage.
PE is susceptible to aging in high-temperature and high-humidity environments and should be stored away from light and heat.
For applications requiring high-temperature lamination or high dimensional stability → PET release film is recommended.
For applications requiring only medium- and low-temperature separation or temporary protection → PE release film is a more cost-effective option.
If customers have specific peel force requirements (such as light peel, medium peel, or heavy peel), we recommend choosing PET release liner with silicone coating, which offers more precise peel force control and better repeatability.
For high-volume products with moderate performance requirements, PE release liner offers significant price advantages.
For precision processes or end products, PET release liner's stability reduces yield loss, making it a more ideal choice.
The above comparison leads us to the following conclusions:
PET release liner is suitable for high-end, precision, and high-temperature applications, offering comprehensive performance but at a higher cost.
PE release liner is suitable for general applications such as isolation and packaging, offering excellent cost-performance, but with certain limitations.
When selecting a release liner, companies should comprehensively consider multiple factors, including the operating environment, processing method, performance requirements, and cost budget. If necessary, they can collaborate with technical release liner suppliers to customize a specialized release liner solution based on application needs.
For more technical information or to purchase PET/PE release liners, please contact:
Email: HarveyXu@revolve-cf.com
Website: https://www.revolve-cf.com
Revolve CF, your trusted supplier of high-performance release liners.
