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Gogson
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Join Date: Nov 2010
Posts: 3

BOPP Curving

11/16/2010 2:50 AM

Hello,

I would like to ask for help in area of possible reasons for curling of BOPP matherial after it is printed with UV collors and covered with wather based varnish.

Can anyone help me?
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PWSlack
Guru
United Kingdom - Member - Indeterminate Engineering Fields - Control Engineering - New Member

Join Date: Jan 2007
Location: In the bothy, 7 chains down the line from Dodman's Lane level crossing, in the nation formerly known as Great Britain. Kettle's on.
Posts: 32175
Good Answers: 839
#1

Re: BOPP CURVING

11/16/2010 5:33 AM

"BOPP matherial"?

"UV collors"?

"Wather"?

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lyn
Guru

Join Date: Oct 2008
Posts: 42355
Good Answers: 1693
#2

Re: BOPP Curving

11/16/2010 11:49 AM

If you are only coating one side, it's probably due to shrinkage during wather (water) evaporation.

How about some meaningful information.
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Gogson
Participant

Join Date: Nov 2010
Posts: 3
#3

Re: BOPP Curving

11/17/2010 4:55 AM

Thank you for first replays.

The matherial is IML bopp matherial 60 and 75 micronTreoffan EUH

Collors are on 1 side UV flexo

Varnish we tried UV and wather based (we encountered problems with both).

Curing of inks: UV with chill drums on other side to prevent overheating

Curing of Varnish: UV same as collors, wather based with hot air

Please do help, its a huge burden not to know why 20% of products curle...

Regards,
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Gogson
Participant

Join Date: Nov 2010
Posts: 3
#4

Re: BOPP Curving

11/26/2010 9:58 AM

Looks like I was too eager at start that I will get help...
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