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RE: [PSUBS-MAILIST] Sodium Polyacrylate



Joe,

This same material is available in pellet form.  Some resourceful home-built rebreather divers take a handful of the pellets and place in a discard lady’s stocking and tied-off.  This bundle is then placed in one of the counterlungs where it soaks up the goobers that result from condensed respiration that collects over a 1 or 2 hour dive.

R/Jay

 

Respectfully,

Jay K. Jeffries

Andros Is., Bahamas

 

Natura nihil fit in frustra

- Nature does nothing in vain

 

 

 

-----Original Message-----
From: owner-personal_submersibles@psubs.org [mailto:owner-personal_submersibles@psubs.org] On Behalf Of Joseph Perkel
Sent: Wednesday, September 06, 2006 8:26 PM
To: personal_submersibles@psubs.org
Subject: RE: [PSUBS-MAILIST] Sodium Polyacrylate

 

 

It would appear that this problem is both a common and significant enough

annoyance to warrant precisely what George is proposing...prototype and

testing. Unless someone has found an "off the shelf solution" which Carstens

posts lead me to believe, are probably non-existent or at least not

effective for this application.

 

So for my part I'd like to contribute data such as this MSDS link on this

substance...

 

http://www.sciencestuff.com/msds/C2688.html

 

As a medical professional, my mind leans toward watching out for exposure

hazards  I have seen the crystals on my daughter on occasion, and there is

some hoopla out there about it's use in diapers but, this stuff appears

pretty benign. Most anything is pretty bad for you these days.

 

The water absorbent properties seem too good to ignore for further study.

Still....I would take care to make sure it stays out of the air by using it

in crystal and not powder form.

 

Joe

 

 

 

 

>From: MerlinSub@t-online.de

>Reply-To: personal_submersibles@psubs.org

>To: <personal_submersibles@psubs.org>

>Subject: RE: [PSUBS-MAILIST] Sodium Polyacrylate

>Date: 06 Sep 2006 21:41 GMT

> 

>I just staring my test with the Co2 scrubber

>partly filled with Silikagel cristalls.

> 

>regards Carsten

> 

>"Smyth, Alec" <Alec.Smyth@compuware.com> schrieb:

> > George,

> >

> > If you build a prototype dehumidifier I'll be happy to test it for you

> > in the sub. I think condensation accounts for a lot of the maintenance

> > load, as everything basically ends up soaking wet.

> >

> > thanks,

> >

> > Alec

> >

> >         -----Original Message-----

> >         From: owner-personal_submersibles@psubs.org

> > [mailto:owner-personal_submersibles@psubs.org] On Behalf Of George

> > Slaterpryce

> >         Sent: Wednesday, September 06, 2006 3:24 PM

> >         To: PSUBS Mailing List

> >         Subject: [PSUBS-MAILIST] Sodium Polyacrylate

> >

> >

> >         Ok, I can't find a pre-fab Hummidity filter made with this stuff

> > anywhere online... I know that they are made... but my google-fu is not

> > strong on this search.

> >

> >         SO...

> >

> >         I thought about how you might make one.

> >

> >         First and foremost, used product will have to be switched out

> > from time to time, so the main filter component will have to be easy to

> > get to and switch out.

> >

> >         Second to promote condensation and from there condensation

> > inside the filter unit itself it'll have to be slightly cooler than the

> > enviroment outside the filter... Problem... small refrigiration units

> > are expensive (energy use wise)

> >

> >         So, what I think one should do is to use a pipe with a fan on

> > the intake side and a normal air filter on the outflow side. that

> > inbetween the intake and outflow has a copper coil with a simple

> > fountain (12vdc) pump that pushes rubbing alchohol through the pipe at

> > speed. Probably accellerated via a kort like nozzle off the pump. It

> > wouldn't cool well enough for a air conditioner, but it should promote a

> > cool atmosphere inside the filter which would promote water to condense

> > within the filter. In the center of the coil which is inside the pipe

> > would be a tissue bag full of sodium polyacrylate. That once used can

> > simply be pulled out and replaced.

> >

> >         I'm thinking of taking a break from BugEye II to prototype this.

> > Anyone interesting in providing a testbed if I do?

> >

> >

> >         George H. Slaterpryce III

> >         www.captovis.com

> >

> > The contents of this e-mail are intended for the named addressee only.

>It contains information that may be confidential. Unless you are the named

>addressee or an authorized designee, you may not copy or use it, or

>disclose it to anyone else. If you received it in error please notify us

>immediately and then destroy it.

> >

> 

> 

> 

> 

> 

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