URGENT...Printing on Polypropylene Bags

[Parker 1]

I need to print an order of Polypropylene Bags Tomorrow.
I need a ink that will cure at very low Temps (under 270).

[brandon]

There is a catalyst for plastisol inks that will help you out. But be careful and test first. I am sure all of the ink companies make the same thing. Sorry, at home with a root canal. Ugh...

[ericheartsu]

we added the catalyst, and still had our belt speed super high

[blue moon]

I need to print an order of Polypropylene Bags Tomorrow.
I need a ink that will cure at very low Temps (under 270).

add nylonbond and run them just enough to be flashed. NB will make them solidify on their own over few days. You might get away with 250 or so this way.

pierre

[Inkworks]

Some companies have a low-temp plastisol that works fine out of the bucket, but it can be pricey. Failing that, nylon additive as some have mentioned.

[ScreenFoo]

Got lucky last week--did 600, catalyzed ink as mentioned, turned down the heat till the chamber was around 320, and ran them through rather slow.

I'd be rather interested in hearing from anyone who reps the companies that make these.  There are several types of PP manufactured, and the melting points range from 266-340F.  I've gotten bags that started balling up well under 300F.

[JBLUE]

Wilflex performance. Cures at 280. That is what I use. Spendy but so is replacing F'd up bags.

[3Deep]

We run regular plastisol one nice stroke and off to the dryer, I speed the belt up just enough the bags are hot and the ink is cured...I look at these bags as a one time thing no washing just grab an go, we print them for a doctors office every other month.

Darryl

[Inkworks]

Got lucky last week--did 600, catalyzed ink as mentioned, turned down the heat till the chamber was around 320, and ran them through rather slow.

I'd be rather interested in hearing from anyone who reps the companies that make these.  There are several types of PP manufactured, and the melting points range from 266-340F.  I've gotten bags that started balling up well under 300F.

the bags I've done go through at about 260-280 for about 1 minute dwell. 320 would shrivel them down to almost nothing.

[abchung]

For synthetic printing, we use Sericol Nylobag.
To speed up the drying, we just flash at low temp.
Just be careful when stacking because the ink can still be wet in the inside.

http://www.fujifilmsericol.co.uk/ff/pi_sheets/PIforWEB23_5_00/Nylobag%20NB.pdf

[tonypep]

We always keep a LCA (low cure additive) for this. Reduce dryer temp by 100 degrees. Does'nt have a pot life

[mk162]

tony, who's low cure additive do you use?  I am not sure I've seen it at my regular ink supplier.

[tonypep]

Excalibur LCA PF (Phthalate Free) from the Lancer group. Tell my friend Brannon to stock it. Its a well kept secret for some reason.

[ScreenFoo]

Got lucky last week--did 600, catalyzed ink as mentioned, turned down the heat till the chamber was around 320, and ran them through rather slow.

I'd be rather interested in hearing from anyone who reps the companies that make these.  There are several types of PP manufactured, and the melting points range from 266-340F.  I've gotten bags that started balling up well under 300F.

the bags I've done go through at about 260-280 for about 1 minute dwell. 320 would shrivel them down to almost nothing.

Chambers at 320--bags got right around 300--had to hit 320 before they puckered around the print.  Good bags, got lucky.
Had an order last year I could not do anything with.  Even at 250 they started to pucker.  The quality of the polypropylene, and how it's manufactured directly affects it's melting point, I can tell you that much.

Anthony:  Great tip, that nylobag looks like the ticket from the spec sheet. 

[royster13]

I think most ASI suppliers print these bags with air dry inks......Maybe the Nazdar folks can chime in on this subject...