Substrate Secrets 
Recent Posts
- ANTEC Conference
- Not too technical
- Extrapolation, Comparison and Use of Polymer Melt Viscosity Data using curve fit data
- Melt disturbance onset from increasing line speed
- Viscosity driver of coextrusion melt disturbance
- Coextruding films without defects
- PVC-PET shrinkage and shrink labels
- The impact of polymer density on substrates
- FDA approval of a film
- Curl of coextruded films
Recent Comments
- rakatin on Substrate surface quality
- Eldridge Mount on Temperature profile on a chill roll
- Jimmy on Temperature profile on a chill roll
- Eldridge Mount on Reply to Jimmy's question
- juan on Dimensional stability considerations
Most Commented On
- Matte surfaces (4)
- Differences in film properties and manufacturing methods used to produce them (2)
- Dimensional stability considerations (2)
- Reply to Jimmy's question (2)
- Temperature profile on a chill roll (2)
Archives
Blog
Link This | Email this | Blog This | Comments (0)
Q & A matte-film printing
Here is a question posted as a comment on the Matte Film post:
Why is it too difficult to print rotogravure designs in matte PET, and why does matte PET have two sides with matte finish? I've tried printing on Mitsubishi MOTR, and it's too hard.
My answer:
I would suspect that printing on a matte surface with gravure roll would be difficult because the wetting of the ink to the surface would be more difficult, due to trapped air in the matte surface behind the ink, and this may prevent the suction needed to pull the ink from the cells making the ink transfer more difficult, i.e. it is easier to pull the ink off the matte surface than from the gravure cell. You might be able to lower the surface tension of the ink to make it easier to pull from the cell.
As to the double-sided matte PET, it is likely that the PET film is a single-layer product and not coextruded and that the matte technology is "in" the film as opposed to being "at" the surface as would be the case with a coextruded product which would allow a differential surface. Ask your supplier if the film is coex, and if so, for a one-side matte film.
Q & A matte-film printing
December 23, 2007
Here is a question posted as a comment on the Matte Film post:Why is it too difficult to print rotogravure designs in matte PET, and why does matte PET have two sides with matte finish? I've tried printing on Mitsubishi MOTR, and it's too hard.
My answer:
I would suspect that printing on a matte surface with gravure roll would be difficult because the wetting of the ink to the surface would be more difficult, due to trapped air in the matte surface behind the ink, and this may prevent the suction needed to pull the ink from the cells making the ink transfer more difficult, i.e. it is easier to pull the ink off the matte surface than from the gravure cell. You might be able to lower the surface tension of the ink to make it easier to pull from the cell.
As to the double-sided matte PET, it is likely that the PET film is a single-layer product and not coextruded and that the matte technology is "in" the film as opposed to being "at" the surface as would be the case with a coextruded product which would allow a differential surface. Ask your supplier if the film is coex, and if so, for a one-side matte film.
Posted by Eldridge M. Mount on December 23, 2007 | Comments (0)
Advertisement
Advertisements
