In the field of modern commercial display and architectural decoration, Flexible LED Film—also known as flexible LED crystal film screen—is gradually replacing traditional LED displays with its ultra-high transparency, lightweight and flexible structure, and innovative visual presentation. It has become increasingly popular in shopping window displays, building glass façades, exhibition installations, and automotive glass advertising.

Among these layers, the PET base film is the core of the entire structure. Its stable physical properties and high light transmittance directly determine the overall display quality and service life of the screen.

Basic Composition and Characteristics of PET Material

PET (Polyethylene Terephthalate) is a high-molecular polymer belonging to the polyester family. It is synthesized through a polycondensation reaction between terephthalic acid (TPA) and ethylene glycol (EG), and is known for its excellent mechanical properties, optical performance, and chemical stability. PET has been widely used for many years in industries such as beverage bottles, optical films, electronic products, and precision packaging.

1. Material Structure

PET is a linear polymer with tightly arranged molecular chains and a controllable degree of crystallinity. The compact molecular structure gives the material excellent transparency and surface smoothness, while the partially crystalline regions provide high strength and good heat resistance.

2. Optical Properties

The visible light transmittance of PET film can reach over 90%. This characteristic gives Flexible LED Film a natural advantage when applied to glass — even when the screen is powered off, the glass maintains its original transparency and clarity.

3. Mechanical Properties

PET film has excellent tensile strength and tear resistance, offering high flexibility that allows it to bend easily without breaking. This makes it ideal for installation on curved or irregularly shaped glass surfaces.

4. Environmental Stability

PET has excellent UV resistance and high-temperature resistance（long-term resistance to 70-120°C）. It remains stable under prolonged sunlight exposure and high-temperature environments, resisting yellowing or aging.

Structural Design of the PET Substrate in Flexible LED Film

• PET Transparent Base Film: As the primary supporting layer, providing structural strength and optical transparency.
• Conductive Circuit Layer (ITO or Silver Nanowire, etc.): Responsible for transmitting electrical signals while maintaining high conductivity and transparency.
• LED Emitting Layer: By advanced micro-packaging technologies (such as COB, SMD, or Micro-LED) to achieve high-brightness display performance.
• Protective Layer (Scratch- and Moisture-Resistant Coating): Protects the circuitry and LED chips, enhancing weather resistance and waterproof performance.
• Adhesive Layer: Enables seamless attachment to glass surfaces, ensuring firm bonding without bubbles after installation.

Among these layers, the PET base film as the core of the entire structure. Its stable physical properties and high light transmittance directly determine the overall display quality and service life of the screen.

Advantages of PET Flexibility in Glass Applications

PET material not only offers high transparency, but also demonstrates excellent flexibility and ductility, giving Flexible LED Film unique advantages in various glass-based installations:

1. Adaptability to Various Installation Environments

Whether applied to flat glass, curved shop windows, or large architectural curtain walls, the PET substrate can conform closely to the surface without creases or cracking. Compared with traditional LED module structures, which are bulky and rigid, the PET material significantly enhances adaptability and design freedom.

2. Easy Installation

Thanks to its ultra-lightweight structure (only about 1–1.5 kg per square meter), the film can be directly attached to the inner or outer side of glass without the need for complex steel framing. This simplifies construction, shortens installation time, and reduces overall project costs.

3. Aesthetic Appeal and Safety Combined

After installation, the transparent PET film has minimal impact on the building’s appearance. When turned off, the glass remains clear and unobstructed; when turned on, the display delivers vivid and bright visuals without affecting indoor lighting. In addition, PET functions as a safety laminate, helping to reinforce the glass and prevent shattering in case of impact.

Supplier of Flexible LED Film

Shenzhen Zhongxian Beixin Technology Co., Ltd. is a high-tech company that is located in Shenzhen, Guangdong Province, specializing in the research and development, production, marketing, and professional services of LED application products and providing various LED display integrated solutions for control rooms, commercial advertising, architectural industries, stadiums, churches, and many other applications.
If you need a high-quality LED display, please feel free to contact us. You can click on the product to contact us. (https://www.leyardleddisplay.com/contact-us/)

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