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2022
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07
Technical Implementation of Mirror Safety Film
Mirrors are prone to shattering, and when they fall, they can injure people; broken shards can cut or pierce, easily causing harm. This is why mirror safety film is especially important. Now, let’s take a look at how mirror safety film is engineered.
Mirrors have smooth surfaces and reflect light; they are classified into two types: plane mirrors and curved mirrors. Plane mirrors are the most commonly used, primarily for checking one’s appearance, decorative purposes, and reflecting light sources. They are widely employed in homes, offices, commercial spaces, and industrial settings, making them an essential item in everyday life. Currently, glass mirrors are the predominant material. However, because glass mirrors are quite heavy, they are cumbersome to handle and install. Moreover, mirrors are prone to breaking; if they fall, they can injure people, causing cuts, punctures, or other injuries. Mirror safety film This makes it all the more important, so let’s take a look at how mirror safety film is technically implemented!
Mirror safety films are relatively thick PC‑film mirrors that require significant tension to flatten and adhere. However, excessive tension increases rebound force, and over time the surface tension diminishes, leading to distortion of the mirrored image. Another type is a comparatively thin VMPET film mirror, which exhibits a thermal shrinkage rate of 20% or more and a heat‑shrinkage temperature range of 70–100°C. Its high shrinkage rate and low shrinkage temperature make it prone to wrinkling on the surface due to rapid ambient temperature fluctuations, thereby degrading imaging performance.
Key technical elements of mirror safety film:
The purpose of the mirror safety film is to provide a novel material and manufacturing process for producing reflective mirrors, thereby addressing the safety concerns, handling difficulties, and manufacturing inconveniences associated with conventional mirrors.
The mirror safety film is safe and shatter-resistant; it comprises a PET base layer, a PET mirror surface that includes the PET base layer, and, on the back of this PET base layer, a metal coating followed by an anti-oxidation coating. A scratch‑resistant resin layer is applied to the surface of the PET base layer. A magnesium–aluminum alloy frame is positioned beneath the PET mirror surface, with an adhesive layer coated on the portion of the frame that contacts the PET mirror surface.
Mirror safety film The thickness ranges from 10 to 100 microns, with a transmittance exceeding 90%, haze below 1.5%, shrinkage less than 3%, and clarity greater than 95%. The metallic coating thickness is between 500 and 1000 nanometers.
The manufacturing method for a safety film designed to prevent mirrors from shattering comprises the following steps.
1) Production of mirror safety film: A metallic coating is deposited on the back side of a PET base film under vacuum conditions; an anti-oxidation coating is then applied over the metallic layer; finally, a synthetic resin is spray-coated onto the surface of the PET base film to form a damage‑resistant resin layer.
2) The mirror safety film is manufactured with a magnesium-aluminum alloy frame tailored to the required size and shape of the mirror, ensuring that the frame’s edges are flush, smooth, and free of burrs where they meet the PET mirror surface.
3) The mirror safety film is produced by cutting a PET reflective sheet to size according to the dimensions of the magnesium‑aluminum alloy frame. The cut PET sheet is then stretched in all directions using specialized equipment, with the tensile stress carefully controlled at 2–10 N. After achieving uniform stretching, a high‑strength adhesive—such as a strong double‑sided tape with a tensile strength exceeding 14 N/cm²—is applied to the edges of the magnesium‑aluminum alloy frame. The working temperature during PET‑film application is maintained between 15 and 35°C; positioning time is 20–30 minutes, and curing takes 24–36 hours.
Mirror safety film It is shatterproof, lightweight, highly safe, easy to carry, and convenient to use; even if broken, it will not cause injury. In addition, the mirror safety film is resistant to acids, alkalis, and oxidation, and is less prone to fogging or black oxidation spots, making it suitable for harsh environments such as bathrooms and chemical processing facilities. Moreover, the production process for this shatterproof mirror safety film is simple, space‑efficient, and energy‑saving, with no adverse impact on the environment.
The above outlines the technical implementation of mirror safety film. For more information, please feel free to contact us!
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