Composition of the Explosion-Proof Film: Different Materials, Different Functions

Explosion-proof film is widely used in various aspects of our lives. These films are present in many everyday scenes, including high light transmission films, building films with thermal insulation and energy-saving properties, and films with health and antibacterial features. Despite their varied functions, the primary purpose of all explosion-proof films is to protect people's health and safety.

While explosion-proof films may appear similar, their composition and materials can differ significantly, resulting in varying performance characteristics. Though they look like a thin layer of film, the composition of explosion-proof films is quite complex.

Generally, the structure of explosion-proof film is composed of basic materials such as a PET safety base layer, an anti-wear layer, composite adhesive, and a high-transparent PET release film. Depending on the functional requirements, additional layers like a heat insulation layer, a color film, and a UV absorption layer may be included. Each material layer serves a specific purpose to enhance the film's overall functionality.

1. Safety Base Layer:

The safety base layer is the foundational material for all explosion-proof films. It is transparent and possesses very strong impact resistance, effectively filtering out glare from the environment. Generally, the anti-glare function is achieved through this layer.

2. PE Synthetic Fiber Layer: 

This crucial layer is directly related to safety. The explosion-proof function is primarily provided by this layer. High-quality explosion-proof film features strong toughness, and the adhesive used can securely hold broken glass together. This prevents secondary damage to passengers caused by glass fragments during accidents. Additionally, its impact resistance is very strong.

3. Transparent Adhesive Layer: 

The transparent adhesive layer primarily enhances the light transmission of the explosion-proof film while maintaining effective light passage. When applied to automobiles, it is recommended to avoid explosion-proof films with a light transmittance of less than 70%. For window films, particularly those on the front side windows, a light transmittance of more than 85% is ideal. This level of transparency ensures that the side window film does not require holes and does not obstruct the driver's view. At night, it can reduce the strong glare from headlights of cars behind, making driving more comfortable. Additionally, it ensures good visibility when driving, turning, and reversing on rainy nights.

4. HC Wear-Resistant Layer: 

The explosion-proof film must endure constant friction from various sources, making scratch resistance one of its essential properties. This layer is exceptionally tough and wear-resistant, protecting the film from daily wear and tear. It prevents scratches on the film's surface, ensuring clear visibility and maintaining the glass in a like-new condition.

5. Insulation Layer: 

This layer selectively reflects infrared and ultraviolet rays from sunlight to provide heat insulation. The thermal insulation performance of a car film depends on its reflection and absorption capabilities. The stronger its ability to reflect and absorb these rays, the higher its heat insulation rate.

6. Ultraviolet Absorbing Layer: 

Although ultraviolet (UV) rays make up only 3% of sunlight, they can cause significant damage, such as fading items and aging plastic and rubber components. Excessive UV exposure can also increase the risk of skin cancer. A high-quality explosion-proof film includes an ultraviolet absorbing layer, which absorbs UV rays that pass through the heat insulation layer. This effectively protects individuals indoors from harmful UV radiation and helps preserve furniture and other interior decorations, slowing their aging process.

There is no inherent standard for the material of explosion-proof membranes, but "visible security" is the goal pursued by consumers and manufacturers. The high-quality explosion-proof film can give us a satisfactory sense of security.