foilMylar

foilMylar refers to a metallized Mylar film, a thin layer of metal deposited onto BoPET (biaxially oriented polyethylene terephthalate) film to create a flexible, reflective foil. This material combines the mechanical strength and dimensional stability of Mylar with the barrier and reflective properties of a metal coating, typically aluminum.

Manufacturing involves coating a prepared BoPET film with a very thin metal layer, usually by evaporation or sputtering in a vacuum. The metallized layer is commonly on one or both surfaces and is typically 6 to 1000 nanometers thick. The film may be corona treated or laminated with adhesives or other films to form packaging laminates, capacitor dielectrics, or reflective surfaces.

Key properties include high tensile strength, good chemical resistance, and dimensional stability. The metallized surface provides high reflectivity and some barrier to moisture and gases, though the metal layer is thin enough to be permeable compared with solid metal foils. Metallized Mylar offers conformability and lighter weight than foil, but pinholes or edge-cracking can affect performance; some applications rely on lamination or additional coatings to enhance barrier or mechanical performance. In electronics, metallized Mylar is used in film capacitors and other dielectric applications, where the metal layer functions as an electrode on a capacitor film.

Applications span packaging laminates for food and consumer goods, reflective insulation and radiant barriers in construction and appliances, solar and thermal control surfaces, and electronic components. foilMylar is often chosen for its lightweight, flexibility, and combined optical and barrier properties, whereas true metal foils provide superior barrier of gases and moisture.