Mylar® is a registered trade name for a polyester film, polyethylene terephthalate, with high dielectric properties, used in tape form as insulation and shield backing.
Mylar® is a registered trade name for a polyester film made of polyethylene terephthalate, a synthetic compound with high dielectric properties. Supplied in the form of a thin tape, it combines strong electrical insulating ability with mechanical toughness and thermal stability, which is why it is so widely used in wire and cable construction. The material is abbreviated as MY and M in specifications.
In cable, Mylar® tape is wound over conductors or cores to provide electrical separation and to back metallic foil shields that reject electromagnetic interference. Its thin profile allows effective insulation and shielding without adding significant diameter, supporting compact, high-performance constructions for data, audio, and video applications.
Because the dielectric properties of Mylar® help preserve signal integrity, its presence in a cable often reflects attention to clean electrical performance. The material is a common element in constructions designed to maintain consistent characteristics over a run.
Because the dielectric properties of this polyester film help preserve signal integrity, its presence in a cable often reflects attention to clean electrical performance, making it a common element in constructions designed to hold consistent characteristics over a run.
At Windy City Wire, an understanding of materials like Mylar® polyester film supports the selection of low-voltage cable engineered for reliable signal performance. Recognizing how this film contributes to insulation and shielding helps customers appreciate the construction quality behind commercial communication and AV cable.
Mylar®, abbreviated MY and M; a registered trademark of its manufacturer