Myra's definition
Mylar comes from English mylar. In Wikipedia, polyester film has been merged with BOPET (biaxially oriented polyethylene terephthalate). Mylar, melinex and hostaphan are common trade names in Europe and America. In China, polyester film is more called polyester film or polyester film.
history
BoPET film appeared in 1950s and was originally developed by DuPont, ICI and Hearst. Kodak used it as film support in 1955. The Echo-2 balloon satellite launched by NASA in 1964 has a diameter of 40 meters and its shell is made of polyester film. It consists of two layers of aluminum foil with a thickness of 4.5 microns and polyester film with a thickness of 9 microns.
Characteristics of Myra
Myra has some characteristics that make it suitable for commercial applications.
insulativity
Allow light to pass through
strong
chemical stability
reflectivity
sealed
Blocking odor
How did Myra make it?
1. The molten PET is extruded onto a cooling surface such as a roll to form a film.
2. The film is stretched in two directions, and a special machine is used to stretch the film in two directions at one time. More often, it is stretched in one direction first, and then in the transverse orthogonal direction. At this time, drum heating will make this process easier.
3. Finally, the film is heat-set at 200 degrees under tension.
4. Pure polyester film is very smooth and will automatically stick together after being rolled up, so it can be coated with a layer of inorganic substances, such as gold, aluminum or other metals by evaporation.
App application
Biaxially stretched polyester films such as Myra can be used in food industry to make flexible packaging, and metal foil BoPET composite can delay food oxidation and flavor loss, such as coffee packaging bags and convenience food packaging. BoPET can also be coated on paper and cloth for book packaging and file preservation. Thin films brighten the surface of objects and provide some protection. Myra can also be used as insulating materials, such as electrical insulation and heat insulation. For example, a first-aid blanket made of metal foil BoPET can keep the body temperature of shock patients. Myra materials also play an important role in solar energy, shipping, aviation and scientific research?
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