7 Apr
2016
7 Apr
'16
10:46 p.m.
On 04/07/2016 10:06 PM, Tom Gardner wrote:
And it's not likely the binder, fully cured
epoxies are also very
stable. Note disks do not have the tension problem that tape has.
There, I have to respectfully disagree. Floppy disks do not use an
epoxy binder, but usually a polyurethane-based one. (Most are
proprietary formulations). Hard disk coatings usually use an
epoxy-phenolic binder, but they're not on a flexible substrate.
Polyurethane isn't forever and tends to be somewhat hygroscopic.
--Chuck