Scrim Material

[davehicks]

The scrim does an excellent job and keeps any water that gets into the can out of the sorb too. Seeing how the scrims are inexpensive and don't need changing that often I'm ok with them. Use what works for your unit.

It just seems like another consumable that could eliminated by a more thoughtful design choice.

My unit is a Kiss Spirit and has integrated steel mesh at the bottom of each canister and a mesh insert for the top.

Years ago the sorb was so dusty everyone used scrims, but i dont ever see enough dust in the sorb i buy now to merit it.

 

[grantctobin]

It just seems like another consumable that could eliminated by a more thoughtful design choice.

My unit is a Kiss Spirit and has integrated steel mesh at the bottom of each canister and a mesh insert for the top.

Years ago the sorb was so dusty everyone used scrims, but i dont ever see enough dust in the sorb i buy now to merit it.

KISS literally sells their scrim for your unit.

 

[davehicks]

KISS literally sells their scrim for your unit.

So what? I don't use it or need it which was the point of my post.

 

[TimPB]

Stumbled across a thread whilst browsing at old posts on CCRx about this very topic.

Theres a few suggestions like vacuum cleaner filter bags and even Bounty paper towels, but the qualitative lab filter paper looked an interesting possibility.

The AP ones for my inspo are cheap enough and last well (unless you drop them in a muddy puddle) that I'll stick to using those, but hope someone finds this useful.

 

[Dave1w]

I have not used scrims in 15 years of ccr diving. I don't see a need for them. Molecular 797 sorb is just not dusty like some old brands of 4-8 sorb were.

I've had dusty 797 as well.

 

[tbone1004]

the picture @rsingler posted is spunbond polypropylene, oval bond pattern, unsure of the basis weight. someone with an accurate drug scale could measure to get gsm. This is the same type of material used in things like puppy pads, baby diapers, and reusable shopping bags.
@grantctobin has sent me a picture which was meltblown polypropylene often seen in things like filtration.
A combination of the two is typically sandwiched meltblown called SMS and is used as a breathable water barrier as the polypropylene is hydrophobic and the pore size of the meltblown is small enough that the water struggles to break its surface tension to pass. It will without enough head pressure but it holds it back fairly well. This is similar to the type of material used in the very early Cis-Lunars.

If I can get an accurate basis weight from it there are plenty of US sources and the material is extraordinarily cheap. Was supposed to get a sample from Fathom but haven't received it yet. Maybe @MattK911 can go to get one for me so we can find an easy source. If I can get an accurate OD I can probably get a friend to die cut a pile of them for very cheap. Material cost will be about $0.02/disc and the only other cost is labor to die cut them which is also basically free. Someone could sell them for a dime and be making 200% profit and paying someone $20/hr.

 

[davehicks]

I've had dusty 797 as well.

What brand?

 

[J-Vo]

some sidewinder users are rotating scrubbers too.

^^^this^^^ Just have to swap the heads after the dive.

 

[Dave1w]

What brand?

Mol Products. all depends on how it was shipped or stored

 

[rsingler]

Here are the results from the Amazon spunbond polypropylene fabric samples.
Hope @tbone1004 can comment.
My wife will weigh the JJ-Scrim fabric in the lab tomorrow and I'll let you know the weight (and how accurate the claimed weight is for the samples).