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looking for info on stabilizing wood for small projects, my =
understanding is that the wood is placed in a vacuum chamber to remove =
moisture and air while submerged in the resin then the chamber is =
returned to normal atmospheric pressure and the resin is forced into the =
cells of the wood ??
what sort of vacuum would be required?? How long would it be necessary =
to be held in the vacuum ?? Would this resin be a two part resin and =
hardener? Whether this is a feasible project to undertake or not I would =
like to have a good understanding of the process. any info would be =
appreciated. Sam
--=20
[email protected]
Remove the 55 - 55 to reply
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<DIV><FONT face=3DArial size=3D2>looking for info on stabilizing wood =
for small=20
projects, my understanding is that the wood is placed in a =
vacuum=20
chamber to remove moisture and air while submerged in the resin then the =
chamber=20
is returned to normal atmospheric pressure and the resin is forced into =
the=20
cells of the wood ??</FONT></DIV>
<DIV><FONT face=3DArial size=3D2>what sort of vacuum would be required?? =
How long=20
would it be necessary to be held in the vacuum ?? Would this resin be a =
two part=20
resin and hardener? Whether this is a feasible project to undertake or =
not I=20
would like to have a good understanding of the process. any info would =
be=20
appreciated. Sam<BR>-- <BR><A=20
href=3D"mailto:[email protected]">[email protected]</A><BR>=
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the 55 - 55 to reply</FONT></DIV></BODY></HTML>
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"joe2" <[email protected]> wrote in message
news:[email protected]...
>
> Sam Wrote:
>> looking for info on stabilizing wood for small projects, my
>> understanding is that the wood is placed in a vacuum chamber to remove
>> moisture and air while submerged in the resin then the chamber is
>> returned to normal atmospheric pressure and the resin is forced into
>> the cells of the wood ??
> Depending on where you are going with your project, there is something
> called CPES, clear penetrating epoxy sealer. Not cheap! Part a and b,
> mix equally, has the consistence of diesel fuel. It penetrates the wood
> and replaces the water in the cells with two-part epoxy, basically
> making the wood (almost) forever.
Well, not really. You have to have dry wood to start with. That's where
the vacuum comes in. The reason you can't "replace" the water in wood is
that up to 30% of the wood's weight is water bound to cellulose at the
molecular level. The stuff inside the cells is long gone before the wood
starts to shrink as this begins to leave.
Theory behind the vacuum is that the water leaves so quickly that the
structure doesn't have time to collapse. Sort of like some of the methods
used in http://nautarch.tamu.edu/class/anth605/File6.htm specifically the
acetone and alcohol-ether dehydrations. The only vacuum method discussed
is the Silicon Oil Treatment, and it doesn't seem it's a home job at all.
The acrylics, since they're soluble in water - Polycril, for instance - will
do fairly well on their own at bulking the surface fiber. Turners use it.
They also use PVA glue to accomplish pretty much the same thing. Here,
however, the idea is if the first crack can't start because the surface is
fully glued, it can't grow into a split.
Sam Wrote:
> looking for info on stabilizing wood for small projects, my
> understanding is that the wood is placed in a vacuum chamber to remove
> moisture and air while submerged in the resin then the chamber is
> returned to normal atmospheric pressure and the resin is forced into
> the cells of the wood ??
> what sort of vacuum would be required?? How long would it be necessary
> to be held in the vacuum ?? Would this resin be a two part resin and
> hardener? Whether this is a feasible project to undertake or not I
> would like to have a good understanding of the process. any info would
> be appreciated. Sam
> --
> [email protected]
> Remove the 55 - 55 to reply
Depending on where you are going with your project, there is something
called CPES, clear penetrating epoxy sealer. Not cheap! Part a and b,
mix equally, has the consistence of diesel fuel. It penetrates the wood
and replaces the water in the cells with two-part epoxy, basically
making the wood (almost) forever. It is used extensively for
restoration and boat building because it encapsulates any existing rot,
solidifies it and makes it workable again, and makes new wood resistant
to the marine environment. A Vacuum is not needed with CPES.
http://www.smithandcompany.org/CPES/
--
joe2