Carbon Fiber Layup - Conformal Peel Ply?

[RKT]

I am doing wet layup in a covoluted mold using "porous teflon coated glass
peel-ply" between the lamnate and the breather. The peel-ply material is not
at all conformal and the pleats/overlaps are interfering with resin takeup.

Is there any other POROUS peel-ply material that is more conformal, better
drape? Is there some kind of porous coating that could be sprayed on the
laminate to perform the same function that could later be removed with
solvent?

[Richard Riley]

On Sat, 28 Feb 2004 08:51:32 -0500, "RKT" > wrote:

:I am doing wet layup in a covoluted mold using "porous teflon coated glass
:peel-ply" between the lamnate and the breather. The peel-ply material is not
:at all conformal and the pleats/overlaps are interfering with resin takeup.
:
:Is there any other POROUS peel-ply material that is more conformal, better
:drape?

Are you vacuum bagging the layup?

If so, cut your teflon glass on the bias, 45 degrees to the threads.
Then stretch it out one direction, then the other, to break the
teflon. You'll find it conforms much better. Then use small pieces
and overlap them, it will need to be able to expand along the overlaps
as the bag pulls everything down. Do the same overlap with the
bleeder.

If not, don't bother with the peel ply at all.

:Is there some kind of porous coating that could be sprayed on the
:laminate to perform the same function that could later be removed with
:solvent?

No.

[Roger Halstead]

On Sat, 28 Feb 2004 10:50:56 -0800, Richard Riley
> wrote:

>On Sat, 28 Feb 2004 08:51:32 -0500, "RKT" > wrote:
>
>:I am doing wet layup in a covoluted mold using "porous teflon coated glass
>:peel-ply" between the lamnate and the breather. The peel-ply material is not
>:at all conformal and the pleats/overlaps are interfering with resin takeup.
>:
>:Is there any other POROUS peel-ply material that is more conformal, better
>:drape?

I use plain old Dacron...I've tried various weaves from coarse to
fine. Too coarse and it can be a bear to get off. Too fine and it may
not be strong enough to pull off. I've also used Nylon with good
success. (I'm using Dow Derakane Vinyl Ester Resin)

Roger Halstead (K8RI & ARRL life member)
(N833R, S# CD-2 Worlds oldest Debonair)
www.rogerhalstead.com
>
>Are you vacuum bagging the layup?
>
>If so, cut your teflon glass on the bias, 45 degrees to the threads.
>Then stretch it out one direction, then the other, to break the
>teflon. You'll find it conforms much better. Then use small pieces
>and overlap them, it will need to be able to expand along the overlaps
>as the bag pulls everything down. Do the same overlap with the
>bleeder.
>
>If not, don't bother with the peel ply at all.
>
>:Is there some kind of porous coating that could be sprayed on the
>:laminate to perform the same function that could later be removed with
>:solvent?
>
>No.

[Cy Galley]

Have you tried cutting the peel ply on the bias?

"Roger Halstead" > wrote in message
...
> On Sat, 28 Feb 2004 10:50:56 -0800, Richard Riley
> > wrote:
>
> >On Sat, 28 Feb 2004 08:51:32 -0500, "RKT" > wrote:
> >
> >:I am doing wet layup in a covoluted mold using "porous teflon coated
glass
> >:peel-ply" between the lamnate and the breather. The peel-ply material is
not
> >:at all conformal and the pleats/overlaps are interfering with resin
takeup.
> >:
> >:Is there any other POROUS peel-ply material that is more conformal,
better
> >:drape?
>
> I use plain old Dacron...I've tried various weaves from coarse to
> fine. Too coarse and it can be a bear to get off. Too fine and it may
> not be strong enough to pull off. I've also used Nylon with good
> success. (I'm using Dow Derakane Vinyl Ester Resin)
>
> Roger Halstead (K8RI & ARRL life member)
> (N833R, S# CD-2 Worlds oldest Debonair)
> www.rogerhalstead.com
> >
> >Are you vacuum bagging the layup?
> >
> >If so, cut your teflon glass on the bias, 45 degrees to the threads.
> >Then stretch it out one direction, then the other, to break the
> >teflon. You'll find it conforms much better. Then use small pieces
> >and overlap them, it will need to be able to expand along the overlaps
> >as the bag pulls everything down. Do the same overlap with the
> >bleeder.
> >
> >If not, don't bother with the peel ply at all.
> >
> >:Is there some kind of porous coating that could be sprayed on the
> >:laminate to perform the same function that could later be removed with
> >:solvent?
> >
> >No.
>

[RKT]

Yes, I am vacuum-bagging. No, I have not tried cutting on the bias and
stretching. Didn't even think of that...

I will try your suggestions. Thank you all for the help.

"Cy Galley" > wrote in message
news:fAm0c.422521$I06.4707963@attbi_s01...
> Have you tried cutting the peel ply on the bias?
>
> "Roger Halstead" > wrote in message
> ...
> > On Sat, 28 Feb 2004 10:50:56 -0800, Richard Riley
> > > wrote:
> >
> > >On Sat, 28 Feb 2004 08:51:32 -0500, "RKT" > wrote:
> > >
> > >:I am doing wet layup in a covoluted mold using "porous teflon coated
> glass
> > >:peel-ply" between the lamnate and the breather. The peel-ply material
is
> not
> > >:at all conformal and the pleats/overlaps are interfering with resin
> takeup.
> > >:
> > >:Is there any other POROUS peel-ply material that is more conformal,
> better
> > >:drape?
> >
> > I use plain old Dacron...I've tried various weaves from coarse to
> > fine. Too coarse and it can be a bear to get off. Too fine and it may
> > not be strong enough to pull off. I've also used Nylon with good
> > success. (I'm using Dow Derakane Vinyl Ester Resin)
> >
> > Roger Halstead (K8RI & ARRL life member)
> > (N833R, S# CD-2 Worlds oldest Debonair)
> > www.rogerhalstead.com
> > >
> > >Are you vacuum bagging the layup?
> > >
> > >If so, cut your teflon glass on the bias, 45 degrees to the threads.
> > >Then stretch it out one direction, then the other, to break the
> > >teflon. You'll find it conforms much better. Then use small pieces
> > >and overlap them, it will need to be able to expand along the overlaps
> > >as the bag pulls everything down. Do the same overlap with the
> > >bleeder.
> > >
> > >If not, don't bother with the peel ply at all.
> > >
> > >:Is there some kind of porous coating that could be sprayed on the
> > >:laminate to perform the same function that could later be removed with
> > >:solvent?
> > >
> > >No.
> >
>
>