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3M PPS Cups and Liners

#1
Just ordered a starter set of these. The lids have a filter screen in them.

1. Are these a good product/technique?

2. Does the filter screen need to be removed to spray SPI products?

Thanks,
 

Barry

Paint Fanatic
Staff member
#3
I have never had so many PIA calls trying to figure out the cause of problems in metallic basecoats and spraying of clear and now the first thing I ask is do you have a screen in your cup? Yes, then give it to someone you don't like.

It was so bad on the batch where a new manufacturer made them that one warehouse said they had 2 pallets of returns setting in their warehouse.
Than it was announce they were coming out with a new design.

There is a long thread on here going back where you can read all about it.
 

Barry

Paint Fanatic
Staff member
#5
Could very well be true as the first design was fine, then sometime last spring or early summer they as I was told had a different manufacturer make them and thats when the crap hit the fan. Of course NEVER an admission of fault so later in summer announced a new design on its way.
 
#6
I have never had so many PIA calls trying to figure out the cause of problems in metallic basecoats and spraying of clear and now the first thing I ask is do you have a screen in your cup? Yes, then give it to someone you don't like.

It was so bad on the batch where a new manufacturer made them that one warehouse said they had 2 pallets of returns setting in their warehouse.
Than it was announce they were coming out with a new design.

There is a long thread on here going back where you can read all about it.
I couldn't find any reference in the search on this products. thxs
 
#7
there are two options for screens if you look hard enough, they have a 125 screen and a 200 screen and they are easy enough to remove for heavy metallics or filler primers. (the numbers are how many holes are in a 1" square)

I have a feeling those china cups we are trying that come with a cup in each box might have been made by the original manufacturer, even though the ring for the cup is smaller, the liners feel thicker.

My worry was they are moving to a different type of connection to the adapter and would retire the originals, I think that is the window the copycats were waiting for.
 
#8
I left the screens in when I was spraying epoxy on my cab, I figured it was different than those little strainers that go in a regular cup as it was flat with more surface area. About midway through the second coat it started to plug as I was spraying the floor. I quickly found out they ripped out easily and Ive never left one in since. I figure if I strain when filling then no more is needed.

I think this is the thread in question http://www.spiuserforum.com/index.php?threads/new-disposable-cups-from-3m.5782/
 
#9
I have never had so many PIA calls trying to figure out the cause of problems in metallic basecoats and spraying of clear and now the first thing I ask is do you have a screen in your cup? Yes, then give it to someone you don't like.

It was so bad on the batch where a new manufacturer made them that one warehouse said they had 2 pallets of returns setting in their warehouse.
Than it was announce they were coming out with a new design.

There is a long thread on here going back where you can read all about it.
Haven't looked lately but at the time that new 3m design disappeared!, gone off the internet! It was a vented design, no liners.
I ended up switching to the Sata RPS. The filters are separate and you can leave them out. Every thing should be strained before the cup gets filled so I mostly leave the filters out. I prefer a vented system, but that's my preference.
 
#10
Those screens and filters in the cup are the first thing I look for and they hit the trash. They are way more of a problem then they are good. I have seen metallics and pearls get loaded in them and all the flushing in the world seems to do no good put clear thru it and you will see specs of pearl and metallic in your clear, you will pull your hair out until you remember you left it in. So the best thing to do is toss it.
 
#11
Wow, talk about timely.. Sprayed epoxy today with no problems. Will do sealer and metallic silver base tomorrow. Guess what gets removed from my PPS cups first thing in the morning. Have to agree, if you run it through a filter as you are filling the cup, dont see much point in the internal filter.
 
#16
I have "old style" pps on LPH400, Pro-lite and LPH80 and have never experienced any flow issues. I wonder if this is a theory that just gets propogated by people rather than a real problem?
 
#17
I have "old style" pps on LPH400, Pro-lite and LPH80 and have never experienced any flow issues. I wonder if this is a theory that just gets propogated by people rather than a real problem?
The only time we "had" to take the filter out was when I was mixing 35 grams of .006 flake to 28 ounces of intercoat clear. We had some surfacer primer just sit on the filter too, and catalyzed polyurethane that was getting too set up to spray anyway. Seemed for the most part, we were fine when the cup was full, but the less weight you have in fluid the harder it was to get thru. Those were real spraying problems that might have arose from using way too much flake since we tried not to spray 15 coats, and whats the sense of trying to do a heavy surface primer to block if you want to thin it so much? But adjusting paint would have probably changed the results.
 
#18
I have "old style" pps on LPH400, Pro-lite and LPH80 and have never experienced any flow issues. I wonder if this is a theory that just gets propogated by people rather than a real problem?
How would one know if there was an issue if they haven't tried the new style? I did see an improvement in fan size. But, it could be psychosomatic.
 
#19
How would one know if there was an issue if they haven't tried the new style? I did see an improvement in fan size. But, it could be psychosomatic.
Because if I set up the gun with a full liner and it sprays in a particular manner, and it sprays in the same manner when the liner is almost empty, how can there be a flow restriction? If there were, I would get dry spray.
 
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