BoPET

[5] BoPET film was developed in the mid-1950s,[6][7] originally by DuPont,[6] Imperial Chemical Industries (ICI), and Hoechst.

[11] The manufacturing process begins with a film of molten polyethylene terephthalate (PET) being extruded onto a chill roll, which quenches it into the amorphous state.

To make handling possible, microscopic inert inorganic particles, such as silicon dioxide, are usually embedded in the PET to roughen the surface of the film.

The result is much less permeable to gases (important in food packaging) and reflects up to 99% of light[citation needed], including much of the infrared spectrum.

For some applications like food packaging, the aluminized boPET film can be laminated with a layer of polyethylene, which provides sealability and improves puncture resistance.

[citation needed] Other coatings, such as conductive indium tin oxide (ITO), can be applied to boPET film by sputter deposition.

Metallized boPET film, 32 layers of ~14 μm thickness each
Chemical structure of polyethylene terephthalate
NASA's Technology Transfer Office at Stennis Space Center worked with a New Orleans seafood packaging company to develop a container to improve the shipping longevity of seafood, primarily frozen and fresh fish, while preserving the taste. A NASA engineer developed metalized heat resistant polybags with thermal foam liners using an enhanced version of the metalized mylar commonly known as "space blanket material," which was produced during the Apollo era.