[vcf-midatlantic] rubber rejuvenation

[Andy Meyer]

Gummi-Pflege

literally "rubber care"


On Fri, Oct 16, 2020, 6:43 PM corey cohen via vcf-midatlantic <
vcf-midatlantic at lists.vcfed.org> wrote:

> There is a special spray that is made for printer platen/rollers.  It does
> a pretty good job of putting them back into working order.  I’ve use it on
> multiple TI silent ASR restorations, the machines are circa 1973/74.
>
> There is rubber treatment that BMW makes for their convertibles that helps
> with rubber seals around convertible tops and windows.  I forget exactly
> what is it called but it’s something like “Gummipledge”.
>
> Cheers,
> Corey
>
> corey cohen
> uǝɥoɔ ʎǝɹoɔ
> Sent from my iPhone
>
> > On Oct 16, 2020, at 8:55 AM, Jason Perkins via vcf-midatlantic <
> vcf-midatlantic at lists.vcfed.org> wrote:
> >
> > My experience is that once the plasticizer in the rubber "goes off" and
> the
> > whole thing turns to goo, there's not much that can be done.
> >
> > I've tried boiling rubber drive belts... it helps a little but not enough
> > for them to work properly.
> > I've got automotive "belt dressing" that makes the belt kind of sticky,
> it
> > can help a little but on small belt drives doesn't do much.
> > I've soaked rubber gaskets in leather treatment oils, which swells them
> up
> > somewhat, but not bad to their original shape. It does make them more
> > flexible.
> >
> > If you had rubber that has turned hard as a rock, I'd wonder if it's
> > possible to absorb new plasticizer into it? What I've seen as the rubber
> > "dries out" it also shrinks, distors, and cracks. Making it soft again
> > won't fix this.
> >
> > If the rubber is still the correct shape, but is gooey, I wonder if
> there's
> > a chemical process that could pull the extra plasticizer out?
> >
> > I'd love to see the process how these rollers were made in the first
> place.
> > I imagine it's similar to what the modern rubber roller rebuild places
> do.
> >
> > Thanks,
> >
> >> On Thu, Oct 15, 2020 at 2:29 PM Jeffrey Jonas via vcf-midatlantic <
> >> vcf-midatlantic at lists.vcfed.org> wrote:
> >>
> >> Many thanks to everyone for their replies.
> >> Degnan is right: I never specified my situation.
> >> I have many rubber items that need restoration:
> >> tape drive rollers, printer/platen rollers,
> >> rubber stampers, sandal soles, etc.
> >>
> >> The rubber feet on equipment is the bane of my existence :-(
> >> I usually just replace them.
> >> The most annoying failure mode is when they LIQUIFY
> >> and slime everything UNDER IT :-0
> >> Next worst: when just ONE is missing.
> >>
> >> -- Jeff Jonas
> >>
> >
> >
> > --
> > Jason Perkins
> > 313 355 0085
>