Quite an interesting read. The first and only plastic bike ever to be made - said to be stronger than steel because of its design.
Full document here: http://www.firstflightbikes.com/newpage5.htm
Read the document - honestly sounds like bs... Can withstand a beating with a sledgehammer, can hold the weight of a fully loaded car on top of it, can withstand high temperatures.... has self lubricating properties and never requires maintenance - with a plastic chain......
And another one that actually made it into production: