TSB
screen printing => Ink and Chemicals => Topic started by: Sbrem on October 18, 2019, 09:22:31 AM
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Hey all, what are folks using for this nowadays? We used to do them years ago, but had to apply a primer first to get ink to stick to them. We just ASI them now, rather than bother with it. But, a customer of ours who owns a couple of businesses we print for, picked up 2500 bags, with a pocket on on side that he wants to put his wife's pizza shop logo onto. Any suggestions? I'd dig, but I'm buried...
Steve
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Any of One Stroke's ELT series inks. We use the ELT-X for better opacity.
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Steve - do you need a primer still?
What version of the bags are they?
If standard Polypropylene bags, any of the many low cure inks on the market will work fine.
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Steve - do you need a primer still?
What version of the bags are they?
If standard Polypropylene bags, any of the many low cure inks on the market will work fine.
Well, it's easier to order them from an ASI supplier when we sell them, because of our previous experience with them. I'm not even sure we still have any of that primer anymore, we got rid of a lot of chemicals when we moved last year. These are insulated (shiny foil) bags from Hit Promotional Products, no style number. Made in China, and that's about it as far as knowing what kind of polypropylene they may be. I'll check to see if we have any low-cure inks on the shelf.
Steve
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They will never be washed so cure is not a issue.
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They will never be washed so cure is not a issue.
But I would think that adhesion (or lack thereof) and abrasion come into play the way that bags get handled.
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They will never be washed so cure is not a issue.
But I would think that adhesion (or lack thereof) and abrasion come into play the way that bags get handled.
That is certainly my concern as well.
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I put nylonbond in my inks.
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I put nylonbond in my inks.
So I've read, but there isn't any nylon in polypropylene (I don't think, I'm not a chemist). We do have some for jackets of course, so I will have to check it out if other folks have it working for them. Thanks all.
Steve
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I put nylonbond in my inks.
So I've read, but there isn't any nylon in polypropylene (I don't think, I'm not a chemist). We do have some for jackets of course, so I will have to check it out if other folks have it working for them. Thanks all.
Steve
Perhaps the Nylobond also helps on the adhesion on this material. No specific knowledge of that fact here, but it also can help lower temp curing if a heat based ink is used.
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I have used air dry inks on these many times. It has worked great for us.
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which specific inks?
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I use nazdar 9600 and 7200 series. I have used both on these several times with no issues.
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I put nylonbond in my inks.
So I've read, but there isn't any nylon in polypropylene (I don't think, I'm not a chemist). We do have some for jackets of course, so I will have to check it out if other folks have it working for them. Thanks all.
Steve
I only do small jobs in house, all 1 color. I have IR dryer, no air with 6' of heat. I just zip them through the dryer so they are dry to the touch and they are not melted. The ink should be very hard after 2 days. No problems at all.
Peter
Perhaps the Nylobond also helps on the adhesion on this material. No specific knowledge of that fact here, but it also can help lower temp curing if a heat based ink is used.
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Throw me in with the under-cure route. I did originally use Nylobond and that helps so you don't melt the bag and get a full cure that can't scratch off. Changed to doing an under-cure at 295F in a gas dryer. 5 degrees or so under bag melt temp and only 25 degrees off full cure temp.
This way no additive, no scrap ink, use plastisol which is quickest.
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We have some low temp plastisols here, so we're going to give them a shot as suggested. I think we'll also look at the One Stroke ELT that was mentioned; I have read about them before.
Steve