Adhesion to UV-Curable Powder Coat

Article From: Products Finishing, ,

Posted on: 6/1/2002

Question: I am a printing shop supervisor searching for a UV ink which can be printed on a metal substrate powder coated with a polyester.

Question:

I am a printing shop supervisor searching for a UV ink which can be printed on a metal substrate powder coated with a polyester. Is there such an animal? Would a UV ink stick to a UV powder coat? C.N.

Answer:

First, I must tell you that I am a paint expert not an ink expert. Having said that, I really see no great differences between most materials used in the coatings and printing industries; for the most part, the resins and pigments are the same. I realize that the pigment volume concentrations and the additives are different. Since they are different, so are the viscosities. However, the UV-curable resin could be the same for coatings and inks. I usually say the resin doesn’t care if it’s in an ink or a coating. It will still cure when exposed to UV radiation.

With the aforementioned facts in mind, let me answer your questions. Yes, there are UV-curable inks commercially available and they have been for some time. I just read an article on the subject. That’s the good news. The bad news is that I didn’t keep the magazine and can’t give you a reference. Second, UV-curable ink will stick to a UV-curable powder coating. That is provided that the UV-curable powder coating does not contain a slip agent (slip agents are used to improve mar resistance) on the surface. If so, the slip agent would act as an interference coating and nothing would stick to it without some kind of pretreatment.

 

Comments are reviewed by moderators before they appear to ensure they meet Products Finishing’s submission guidelines.
blog comments powered by Disqus


Learn More

Zones

Supplier Categories


More Technology. Expert Support. Better Solutions. Finishing Technologies by Finishing Brands
Kremlin by EXEL North America
Global Finishing Solutions

Suppliers | Products | Experts | News | Articles | Calendar | Process Zones

The Voice of the Finishing Industry Since 1936 Copyright © Gardner Business Media, Inc. 2014

Subscribe | Advertise | Contact Us | All Rights Reserved