Editing BoPET (section)

== History ==
BoPET film was developed in the mid-1950s,<ref name=Izard>Izard, Emmette Farr, [https://image-ppubs.uspto.gov/dirsearch-public/print/downloadPdf/2534028 "Production of polyethylene terephthalate"], U.S. patent no. 2,534,028 (filed: 1948 May 13; issued:  1950 December 12).</ref><ref>Adams, John Francis Edward; Gerber, Kenneth George; Holmes-Walker, William Anthony, [http://pdfpiw.uspto.gov/.piw?Docid=03177277&homeurl=http%3A%2F%2Fpatft.uspto.gov%2Fnetacgi%2Fnph-Parser%3FSect2%3DPTO1%2526Sect2%3DHITOFF%2526p%3D1%2526u%3D%2Fnetahtml%2FPTO%2Fsearch-bool.html%2526r%3D1%2526f%3DG%2526l%3D50%2526d%3DPALL%2526S1%3D3177277.PN.%2526OS%3DPN%2F3177277%2526RS%3DPN%2F3177277&PageNum=&Rtype=&SectionNum=&idkey=NONE&Input=View+first+page "Process for the production of biaxially oriented polyethylene terephthalate film"], U.S. patent no. 3,177,277 (filed: 1957 May 10; issued: 1965 April 6).</ref> originally by [[DuPont (1802–2017)|DuPont]],<ref name=Izard/> [[Imperial Chemical Industries]] (ICI), and [[Hoechst AG|Hoechst]].

In 1953 [[Buckminster Fuller]] used Mylar as a skin for a [[geodesic dome]], which he built with students at the [[University of Oregon]].<ref>{{citation | title=Fuller Directs Installation Of Dymaxion-Type Dome| publisher=[[Oregon Daily Emerald]]|date=April 10, 1953| url=https://oregonnews.uoregon.edu/lccn/2004260239/1953-04-10/ed-1/seq-7.pdf }}</ref>

In 1955 [[Eastman Kodak]] used Mylar as a support for photographic film and called it "ESTAR Base".<ref name="KodakESTAR">{{cite web |title=Kodak HCF Film/ESTAR Base |url=https://www.kodak.com/uploadedFiles/Corporate/Industrial_Materials_Group/E4058_HCFFilm.pdf |website=www.kodak.com |publisher=[[Eastman Kodak Company]] |access-date=2018-08-24 |date=April 2015}}</ref> The very thin and tough film allowed {{convert|6000|ft|adj=on}} reels to be exposed on long-range [[Lockheed U-2|U-2]] reconnaissance flights.<ref>''Eyes in the Sky'', Dino A. Brugioni 2010, Naval Institute Press, {{ISBN|978 1 59114 082 5}}, pp. 102, 115.</ref>

In 1964, [[NASA]] launched [[Project Echo#Echo 2|Echo II]], a {{convert|40|m|ft|0|adj=on}} diameter balloon constructed from a {{convert|9|μm|in|adj=on}} thick boPET film sandwiched between two layers of {{convert|4.5|μm|in|adj=on}} thick aluminium foil bonded together.<ref>Staugaitis, C. & Kobren, L. (1966) "Mechanical And Physical Properties of the Echo II Metal-Polymer Laminate (NASA TN D-3409)", NASA Goddard Space Flight Center.</ref>