What is the structure of automotive explosion-proof and heat-insulating film?
2 Answers
Automotive explosion-proof and heat-insulating film consists of seven layers in its product structure: wear-resistant outer layer, safety base layer, heat-insulating layer, UV-blocking layer, pressure-sensitive adhesive layer, easy-application adhesive grinding layer, and transparent substrate. These layers collectively provide comprehensive functions such as explosion-proofing, sun protection, UV isolation, and anti-glare. Although the automotive explosion-proof and heat-insulating film appears as a thin layer to the naked eye, high-quality films actually feature a complex multi-layer structure with extremely sophisticated production processes. The explosion-proof film is a metal membrane installed on the upper part of pressure vessels to prevent explosions, serving as a safety device also known as a rupture disc or bursting disc. When the internal pressure exceeds a certain limit, the membrane ruptures first, thereby reducing the internal pressure and preventing explosions, making it widely used in pressure vessels.
Let me share the structure of automotive explosion-proof and heat-insulating films based on practical experience. It's essentially a multi-layer stack, much like a sandwich: the outermost layer is a scratch-resistant coating that prevents daily abrasions, such as key scratches leaving no marks; the middle layer is the core, made of PET polyester material infused with metal particles or ceramic components—this layer absorbs and reflects heat, keeping the car interior from becoming unbearably hot in summer; the innermost layer is an adhesive with slight tackiness, applied directly to the window glass. The key design here ensures the film holds shattered glass in place during a collision to prevent injuries. Additionally, there's a UV-protective layer to safeguard skin and prevent interior fading. Having applied it several times, I recommend films with nanotechnology for better heat insulation, which helps save on air conditioning costs. Installation requires a dust-free environment to avoid bubbles obstructing visibility, and regular cleaning with a soft cloth maintains clarity. Periodically check edge seals to prevent adhesive degradation and aging.
