Method of multi-station flexographic printing including anilox roll with low surface energy zone
View Patent ↗An anilox roll with low surface energy zone includes a cylinder having a curved contact surface, an ink transfer zone formed on a first portion of the curved contact surface, and a low surface energy zone formed on a second portion of the curved contact surface. The ink transfer zone includes a plurality of cells configured to transfer ink. The low surface energy zone includes a hydrophobic surface with a contact angle of at least 75 degrees and a surface roughness of less than 100 micrometers.
1. A method of multi-station flexographic printing comprising:
printing a first image on a substrate using a first flexographic printing station, wherein the first flexographic printing station includes a first fountain roll, a first flexographic plate, and a first anilox roll for transferring ink from the first fountain roll to the first flexographic plate; and
printing a second image on the substrate using a second flexographic printing station, wherein the second flexographic printing station includes a second fountain roll, a second flexographic plate, and a second anilox roll for transferring ink from the second fountain roll to portions of the second flexographic plate, the second anilox roll including:
an ink transfer zone formed on a first portion of a curved contact surface of the second anilox roll; and
a low surface energy zone formed on a second portion of the curved contact surface of the second anilox roll, the second portion of the curved contact surface being separate from the first portion of the curved contact surface;
wherein the ink transfer zone includes a plurality of cells configured to transfer ink from the second fountain roller to a corresponding portion of the second flexographic plate, and
wherein the low surface energy zone comprises a hydrophobic surface with a contact angle of at least 75 degrees and a surface roughness of less than 100 micrometers to inhibit transfer of ink from the fountain roller to a corresponding portion of the second flexographic plate.
2. The method of claim 1 , wherein the hydrophobic surface includes a low surface energy coating.
3. The method of claim 1 , wherein the hydrophobic surface includes a plurality of microscopic structures.
4. The method of claim 1 , wherein the hydrophobic surface includes a smooth surface having a low surface roughness.
5. The method of claim 1 , wherein the hydrophobic surface includes a low surface energy coating and a plurality of microscopic structures.
6. The method of claim 1 , wherein the hydrophobic surface includes a low surface energy coating with a smooth surface having a low surface roughness.
7. The method of claim 1 , wherein the plurality of cells disposed in the ink transfer zone are formed in a first coating.
8. The method of claim 7 , wherein a second coating is disposed over the plurality of cells formed in the first coating.
9. The method of claim 1 , wherein each cell is configured to hold a volume of 0.5 BCM of ink or less.
10. The method of claim 1 , wherein each cell is configured to hold a volume of 1.0 BCM of ink or less.
11. The method of claim 1 , further including printing one or more subsequent images on the substrate using corresponding subsequent flexographic printing stations, wherein each subsequent flexographic printing station includes a corresponding fountain roll, a corresponding flexographic plate, and a corresponding anilox roll for transferring ink from the corresponding fountain roll to the corresponding flexographic plate, the corresponding anilox roll including an ink transfer zone formed on a first portion of a curved contact surface of the corresponding anilox roll and a low surface energy zone formed on a second portion of the curved contact surface of the corresponding anilox roll.