Why do good floppy disks go bad?

[Paul Koning]

> On Apr 8, 2016, at 3:11 PM, Tom Gardner <t.gardner at computer.org> wrote:
> 
> Sorry, to a EE they are all epoxies, but:
> 
> "BINDER: A polymer such as polyester-polyurethane used to bind magnetic
> particles together and adhere them to the base film in the manufacturing of
> magnetic media."
> http://www.fujifilmusa.com/shared/bin/Magnetic_Media_Terminology.pdf
> 
> "Polyester polyurethane is the workhorse of polyurethane films. It offers
> excellent strength and long-term stability"
> http://www.apiusa.com/polyesterpolyure.html 
> 
> I think properly cured all binders used are pretty stable.

That may be, but if so, there are some big name vendors who do not know "properly".

	paul