Re: Materials for machines. Was MDF for machines

Hello,

Sintra is one trademark name of an EXPANDED PVC foam that sign makers
use...

Hope this helps.

Ballendo

--- In CAD_CAM_EDM_DRO@y..., "Tom Eldredge" <harmonyt@r...> wrote:
> Signmakers use white pvc sheets a lot, sold under different names.
A half
> inch sheet of pvc that signmakers use would be a very versatile and
> available material for things like router tables. I have used this
stuff for
> signs I have made, but I forget the names it is sold under. Don't
remember
> much expasion problems with pvc. Signmakers?
>
> Tom E.
>
> ----- Original Message -----
> From: Tom Murray <thomasm923@a...>
> To: <CAD_CAM_EDM_DRO@y...>
> Sent: Wednesday, June 27, 2001 9:38 PM
> Subject: [CAD_CAM_EDM_DRO] Re: Materials for machines. Was MDF for
machines
>
>
> > --- In CAD_CAM_EDM_DRO@y..., ballendo@y... wrote:
> > > P.P.S. Another possibility is a "chemical grade" sheet plastic.
> > Don't
> > > use plain polycarbonate(Lexan, Tuffek are two trade names), as
the
> > > hydrocarbons of the dielectric will weaken and "craze" it...
> > Acrylic
> > > might also work, and PVC sheet seems a (good)possible
alternative.
> > >
> > > I suspect that the plastic alternative panels will not have
> > > the "stiffness" of the trespa or phenolic, so consider this when
> > you
> > > are deciding.
> >
> > PVC is a pretty good choice in regards to chemical resistance,
> > however a good plastic to consider is Delrin (also known as
Acetal).
> > From what I've seen it is pretty stiff and it is resistant to a
lot
> > of chemicals. Another plus - it is relatively inexpensive. I can
> > check on it's resistance to dielectric fluid if someone can tell
me
> > what is in it.
> >
> > -Tom Murray
> >
> >
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