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'[TECH]:: How to make a ... (mainly plastic related'
2008\08\04@141049 by Bob Blick

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On Mon, 4 Aug 2008 13:47:28 -0400 (EDT), spam_OUTpiclistTakeThisOuTspamian.org said:

> One of my hobbies is working with acrylic.  What I like about the stuff
> is
> that you don't glue pieces together.  You place two bits together and
> inject a solvent between them and it unbinds the long chain molecules,
> lets them mingle and then evaporates.  You wind up with a seamless (with
> practice) join that makes the two parts one solid piece.

The only problem is the evaporation part - I hate grabbing the can and
finding it empty, when it was half full last time I used it!

TAP plastics is fun, I have one on my commute route and it's fun to
browse in the $0.10 bin.

Cheerful regards,

Bob


--
http://www.fastmail.fm - And now for something completely different…

2008\08\04@144227 by piclist

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On Mon, 4 Aug 2008, Bob Blick wrote:
> The only problem is the evaporation part - I hate grabbing the can and
> finding it empty, when it was half full last time I used it!

Oh yeah.. and the fact it's insanely toxic and you shouldn't touch it or
breathe the fumes.

--
Ian Smith
http://www.ian.org

2008\08\04@160930 by John Ferrell

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What is the solvent?

John Ferrell    W8CCW

"All that is necessary for the triumph of evil is for good men to do
nothing." -- Edmund Burke
http://DixieNC.US

{Original Message removed}

2008\08\04@162238 by Bob Blick

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>From the can, which smells nasty even when screwed tightly shut:

"Contains Methylene Chloride, Trichloroethylene and Methyl Methacrylate
Monomer"

-Bob

On Mon, 4 Aug 2008 16:09:29 -0400, "John Ferrell"
<.....johnferrellKILLspamspam@spam@earthlink.net> said:
> What is the solvent?
>
> John Ferrell    W8CCW
>
> "All that is necessary for the triumph of evil is for good men to do
> nothing." -- Edmund Burke
> http://DixieNC.US
>
> {Original Message removed}

2008\08\04@181016 by Apptech

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> >From the can, which smells nasty even when screwed
> >tightly shut:
>
> "Contains Methylene Chloride, Trichloroethylene and Methyl
> Methacrylate
> Monomer"

Methylene Chloride is a known (ie generally claimed)
carcinogen.

Trichloroethylene th same, plus for good measure a liver
poison absorbed through the skin. We used to splash it
around for cleaning and it was a standard dry cleaning fluid
for many years.

MM my brain has no comments on (no doubt Gargoyle has) , but
I've no doubt  it will be a match for the other two as well
:-).

Stand clear - preferably up wind.

This is almost certainly typical

       http://selectproducts.com/ftpfiles/weld4.pdf

Says:

This material is an aspiration hazard and defats the skin.
The ingredients are toxic by inhalation and ingestion and
may be absorbed through the skin. Exposure by these routes
may cause central nervous system depression, liver and
kidney damage and may sensitize the heart muscle. Methylene
Chloride may interfere with the oxygen carrying capacity of
the blood. Methylene Chloride and Trichloroethylene are
possible human cancer hazards based on test results with
laboratory animals. Methylene Chloride has been listed as a
potential carcinogen by IARC and NTP. Trichloroethylene has
not been identifed as a carcinogen by IARC, NTP, ACGIH or
OSHA. Methylene Chloride is not believed to pose a
measureable risk to man when handled as recommended.  Under
some circumstances, mutagenic changes have been observed
with Methyl Methacrylate in animal studies. Precautions
should be taken to avoid unnecessary exposure to this
cement.


YMMV.
But YMMNV.


____________

       http://msds.chem.ox.ac.uk/ME/methyl_methacrylate.html




       Russell



2008\08\05@131458 by Al Shinn

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Now THAT was a really clever bit no doubt from their marketing dept -
That solvent cement used to be supplied in little glass bottles - I
still have a couple of them from probably more than ten years ago -
still half full! Still works fine! AND, way easier to open with my POOR
old arthritic hands (whine)!
The story when I asked about the horrible self emptying cans was that
there was too much breakage with the LITTLE glass bottles and besides,
the stuff goes bad after awhile anyway. Yeah, right!

--

Looking forward,
Al Shinn

On Mon, 4 Aug 2008, Bob Blick wrote:
>The only problem is the evaporation part - I hate grabbing the can
>and finding it empty, when it was half full last time I used it!



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