Radiation Curing Seminar
Phil Vara
Fri, 27 Jun 1997 20:32:45 -0700
September 10-11: 6th Annual Advanced Radiation (UV/EB) Curing
Marketing/Technolgy Seminar. Marriott Hotel, Newark Airport, Newark, NJ.
Sponsored by Armbruster Associates Inc., Contact David Armbruster, 43
Stockton Road, Summit, NJ 07901. Phone 908 277 1614, FAX 908 277 1573,
Email drdavearm@worldnet.att.net
--
?_
carbon fiber
kmetaverso@aol.com (Kmetaverso)
27 Jun 1997 06:59:11 GMT
To: Alex Mass, c/o ACME Inc
I e-mailed you previously about some of the c-fiber you have
(braided socks, cloth, tape, etc) and was wondering if you have
any way of milling it. We've decided to abandon the fabric-layup
process and instead we want to be able to mix in a milled or even
flaky material, since we mix our own goops.
So...can you mill the stuff to some sort of spreadable consistency,
like fur or short hair? I was thinking maybe grinding it literally
between
two cement blocks or something, but I used up all my cloth and
tape already and I don't have any more orders or use for it right now,
but in the future, I'd like to be able to incorporate it into my
fabrication.
How much would you charge to ship me 3 to 5 ounces of
of ground-up c-fiber, maximum fiber length about one inch (2.5 cm)?
Yours Truly,
Kris Metaverso
(909) 399 9706
634 Sycamore Ave,
Claremont, California 91711
USA
Re: How can I dissolve cured polyurethane foam?
Andrew Warden and Julianne Halley
Sat, 28 Jun 1997 10:53:07 -0700
John wrote:
>
> Hello,
>
> I recently used some expanding foam insulation (Mono-Foam brand) in an
> attempt to fill in a cavity between some laminated wood flooring
> material and the underlying concrete sub-floor. Unfortunately, I used
> too much foam. This resulted in a noticable bulge where the cavity
> once was.
>
> I was hoping that someone here may be able to tell me if there is any
> way to dissolve the foam once it has been cured. The ideal chemical
> would break down the PU foam without damaging the wood flooring.
John,
I would suggest (If you can get it) MEK (Methyl Ethyl Ketone). Unfortunately, this will
also dissolve the polymer in your floor polish/wood coating. This is also a hazardous
material (in Australia anyway) and you would be well advised to wear protective gloves
(NOT latex ones) while you use this stuff. Hope this helps.
Regards,
The Judge
--
*** The greatest man is he who can achieve the greatest thing and not feel the need to
breathe a word about it. *** The Judge
Re: How can I dissolve cured polyurethane foam?
Gina Tomasino and Chris Kierans
Fri, 27 Jun 1997 22:00:24 -0700
I am sorry to say it (maybe I am wrong), but if you want to get rid of
the bulge your best bet would be to remove the floor, remove the excess
foam with a hand grinder or similar tool and replace the floor.
There are some very strong "solvents" that will soften the foam, but it
sounds to me as though you have quite a bit of it between the wood
flooring and the concrete sub-floor and these solvents probably wouldn't
do you much good. E.g. even if you had something that worked, you'd
have to get rid of the solvent afterwards ;-)
In plants and facilities where urethane foam is processed or
manufactured they soak machinery components in some pretty nasty
compounds such as DMF (dimethyl formamide?) or NMP (n-methyl
pyrrolidone) (90% sure I got the chemical names right). NMP is sold
industrially by BASF and maybe other chemical companies. Processors
(i.e. companies who use PU chemistry say for insulating, seating, etc.)
might soak machinery components that are gummed up with foam to clean
them. But as I said, these chemicals are pretty nasty, all they do is
soften the foam leaving a mass of gummy residual "gunk" and would not be
used to dissolve away a large quantity of foam. Also I would think it
extremely unlikely that these chemicals are available as a consumer
item.
If all you want to do is remove small specks or blobs that may be
sticking to the floor, you might try Polystrip or some commercial paint
removers, but I am not promising anything. You might want to call the
people at Mono - who knows do they have an 800 number or a web site :-)
- and ask their advice.
One other thing, shooting urethane chemicals "blindly" into a cavity may
be asking for trouble in another way: for instance if there was any
water in the gap, e.g. if the concrete was excessively damp, the foam
would likely be of very poor quality, would expand too much, and would
not adhere to the substrate (concrete).
In my opinion, any chemical solvent, even if you could get your hands on
a sample, is asking for more trouble, and you'd be better off removing
the bulging foam physically.
Regards,
Chris Kierans
John wrote:
>
> Hello,
>
> I recently used some expanding foam insulation (Mono-Foam brand) in an
> attempt to fill in a cavity between some laminated wood flooring
> material and the underlying concrete sub-floor. Unfortunately, I used
> too much foam. This resulted in a noticable bulge where the cavity
> once was.
>
> I was hoping that someone here may be able to tell me if there is any
> way to dissolve the foam once it has been cured. The ideal chemical
> would break down the PU foam without damaging the wood flooring.
>
> Any suggestions would be greatly appreciated.
>
> Thank you,
>
> John Zivkovic
> jonn@*spamoff*oanet.com
