Tekra Fundamentals - What is Mylar® Film Made Of?

What is Mylar® Film Made Of?

Mylar® polyester film is made of polyethylene terephthalate (PET) and manufactured by Mylar® Specialty Films (formerly DuPont Teijin Films™).  First, molten polyethylene terephthalate (PET) polymer is extruded onto a chill roll drum to form film. The film is then biaxially oriented by being stretched first in the machine direction (MD) and then in the transverse direction (TD). This orientation is accomplished by passing the film over rollers that run at increasingly faster speeds (MD orientation), and then feeding it into a stenter frame where it is pulled at right angles (TD orientation). This stretching rearranges the PET molecules into an orderly structure, which substantially improves the film’s mechanical properties. Finally, the film is heat set to stabilize it. This ensures the film will not shrink again until exposed to its original heat set temperature.

What Is Mylar® Film?

Mylar® is one of the world’s most recognized and widely used polyester films.  Because of its popularity, the term “Mylar” is often used when referring generally to plastic film.  However, Mylar® is actually the name of a popular PET film brand that belongs to the family of polyester brands from Mylar® Specialty Films (formerly DuPont Teijin Films™) which also includes Melinex®.  Mylar® is a biaxially-oriented polyethylene terephthalate (BoPET), meaning it is stretched in two directions to give it exceptional tensile strength. 

Tekra Offers Mylar® Film Rolls and Sheets

Tekra offers Mylar® PET film rolls and sheets in a variety of thicknesses (0.5 mil to 14 mil) and widths, and we actively stock several Mylar® film types including:

  • Very Clear
  • Super Clear
  • Hazy

Tekra is an authorized distributor of Mylar® Specialty Films (formerly DuPont Teijin Films™), and we offer product innovation, market knowledge and technical expertise.   We welcome the opportunity to better understand your polyester requirements, and will provide both technical & commercial guidance for matching the right film to your specifications.

Feel free to contact Tekra at 1-800-448-3572 to discuss your Mylar® polyester film needs.  

polyethylene terephthalate structure

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