Bradvek
{{one source|date=December 2020}}
Bradvek was a form of Tyvek polymer, produced by DuPont.{{cite book
|title= Bank Regulations
|last= Singh
|first= S.k.
|author-link= S.k. Singh
|year= 2009
|publisher= Discovery Publishing House
|location=
|isbn= 978-81-8356-447-2
|page= 25
|url= https://books.google.com/books?id=_FUoBlN8p_EC&dq=Bradvek&pg=PA25}} It was used for printing one of the first polymer banknotes in 1983 for the Isle of Man by the American Banknote Company.