Scrim Material

[rsingler]

So here are the actual fabric weights, using a lab scale accurate to .0001 g, and a fabric sample of about 250 cm²
(1 sq. meter is 10,000 cm²):

The next question for @tbone1004 is, "is the 'filter' the soft fluffy stuff, or the thin windows of pressed fused polypro?"
The fused windows are smaller in the 50 g sample, but if they're not the filter portion, then the fluffy filter area is more of the total area in that sample, and the fluffy portion looks more like the JJ material, despite being of lighter weight.

If my supposition that it's the "non-window" portion (the grid) that does the work, I'd either be tempted to try the "50"/37.8g or "60"/55.3g fabrics, or look for another bunch of samples). The weave in the "42"/49.4g fabric looks less consistent.

If it's the "windows" that do the actual filtering, then the 49.4g fabric is closest to JJ, on top of appearing to have more windows. But I'm suspecting the opposite is how it works.

@tbone1004 ??

 

[tbone1004]

@rsingler maybe on @Luis H 's next zoom call we can go into the full differences of how this stuff is made but the unbonded or "fluffy" bits are what is filtering. The diamonds are not actually press fused but are fused via a hot oil calendaring process and is to hold the fabric together. Huge amounts of information on this though and many different bonding patterns based on the tensile strength requirement, this is just the generic cheap stuff. Hell if you really wanted to be cheap you can just as easily use weed barrier from home depot as it's the same stuff but I'll have some samples for you after a meeting in a few weeks now that I know the rough basis weight.

 

[Dsix36]

Did this tread ever figure it out exactly?

 

[DepthCharge]

Ok, so we are 25 years into commercially available rebreathers, but as of now, I still can't do a quick google and get a definitive answer to - what material do manufacturers use for their scrims in the scrubber, so I can just go to a supplier and buy a roll or whatever.
We have, scotch pads (ok for a while) cut down Inspo scrims, vacuum cleaner bags etc. suggested but has anyone ever got a clear - buy a roll of this XYZ sheet, manufactured by ABC ltd. and is the exact material you need.

Is this some mystery trade secret or what?

I've been using a plastic screen in my inspo. Home depot has one that is called pet proof or something like that. Thicker than regular screen. You can cut about a hundred from a roll.works great

 

[macado]

Did we ever figure the best material out? I have plenty of rEvo scrims I can re-use but I have a need for skim material for upcoming project. I could just buy additional rEvo or JJ skims I guess.

 

[greeniguana]

Did we ever figure the best material out? I have plenty of rEvo scrims I can re-use but I have a need from skim material for upcoming project. I could just buy additional rEvo or JJ skims I guess.

The best, I don't know, but I have been using leftover covid mask liner material to make circles for my choptima scrubber.

 

[Tracy]

The best, I don't know, but I have been using leftover covid mask liner material to make circles for my choptima scrubber.

Have been using?
How often are you changing these things? They last for years.

 

[greeniguana]

Have been using?
How often are you changing these things? They last for years.

I throw them away when I dump out sorb!

I made probably 200-300 out of half of a pack of the material, which was less than $15 back during covid. Ill send you some if you want :^)