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How do I stop warpage after laminating?
Hi there,
I’m laminating prints using a hot laminator but there seems to be a lot of stress on the final film which means it just rolls up & I’m worried if I mount this then the edges will peel away.
Any ideas how to stop this? Am I laminating too hot/cold or running it too fast through the machine? Current setting is 105oC.
ta,
J
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7 Replies
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sounds like it is too hot mate.
Also, has your print dried for 24 hours or so?
Hot laminating a print that has not ‘cured’ will cause an issue I’m told…
I don’t hot laminated myself, so I’m only repeating something second hand
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Hi J
We laminate cold so not sure about the heat but it may be that there is too much tension on the laminate. Try releasing the brake a little.
Hope that helps.
Cheers. Nick.
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Thanks for that, I’ll have a play on some dummy samples tonight & see if I can sort it out.
Many thanks 🙂
J
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Hi,
I have done both hot and cold laminating before, this sounds like you are using to much tension.What thickness laminate are you using?
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we hot laminate but only at 45oC enough to take to mottling out of the laminate. never had any problems with curling or shrinkage that way.
Ian
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Hi James,
you have a heat and tention problem. For a normal laminate you should run at about 50oC. For a cast laminate you should only run at about 30-35oC. Try to have as little tention as possible because if you have a lot of tention on the laminator that then transfers onto the print.Try setting the tention very light so that you can turn the bar with the laminate on it with your hands and feel just a little resistance. If you find that the laminate is creasing or wrinkling then you my not be setting up properly or the nip on the rollers needs reset. A good laminator doesn’t need much tention if any at all. -
Hi James,
What type of laminate are you using? cold pressure sensitive or hot laminating / low melt film?
What material are yo trying to laminate?
Chris
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