What is flexo printing with uv ink?
author: Uvink
2022-12-22
What is flexo printing with uv ink?Flexographic printing is a printing process that
has developed rapidly in recent years. The image and text part of the printing plate is
higher than the non image and text part, and has flexibility, which can better express
the subtle level and contour of the image and text part. In addition, it applies to a wide
range of printing materials. In addition to traditional paper, some non absorbable printing
materials, such as plastic film, aluminum foil composite paper, cellophane, can also be
printed by flexography.When using UV ink for flexographic printing, in addition to
the problems of coloring, curing and adhesion,attention must also be paid to the influence
of ink components on the viscosity and rheology of the ink,so as to obtain better
printability and stability.
What is flexo printing with uv ink?The flexographic printing process determines that
the UV ink used should not have a high viscosity. Traditional flexographic printing inks are
solvent based and water-based. A large amount of solvent or water is needed to adjust
the viscosity. Because a large amount of solvent is used, most flexographic printing inks
are similar to Newtonian fluid in rheological properties, which will lead to ink sedimentation
and instability. Therefore, appropriate thixotropy of flexographic printing inks can prevent
pigment flocculation and sedimentation.
What is flexo printing with uv ink?UV flexographic printing ink uses active thinner to
reduce the viscosity of the system, so its viscosity may be higher than that of solvent
based flexographic printing ink on the whole. Although the viscosity of UV flexographic
printing ink is lower than that of screen printing and offset printing ink, the addition of
pigments will improve the viscosity, especially when the wetting, dispersion and stability of
pigments are not well handled. In addition, pigments play a more important role in the rheology of ink,
and appropriate thixotropy is beneficial. This is because when the molecular cross-linking inside the ink
reaches a certain degree and pseudoplasticity occurs, the viscosity of the ink system without pigment
dispersion stabilizer will drop sharply on the high-speed ink roller, but when it leaves the ink roller and
enters the printing part with relatively low speed, the viscosity will rise rapidly, and the wetting effect on
the substrate surface is too poor, Not suitable for printing. The ink containing appropriate dispersion
stabilizer has a certain stability, and its viscosity is not high. After high shearing, the viscosity
rises slowly, and the printing adaptability is good.
has developed rapidly in recent years. The image and text part of the printing plate is
higher than the non image and text part, and has flexibility, which can better express
the subtle level and contour of the image and text part. In addition, it applies to a wide
range of printing materials. In addition to traditional paper, some non absorbable printing
materials, such as plastic film, aluminum foil composite paper, cellophane, can also be
printed by flexography.When using UV ink for flexographic printing, in addition to
the problems of coloring, curing and adhesion,attention must also be paid to the influence
of ink components on the viscosity and rheology of the ink,so as to obtain better
printability and stability.
What is flexo printing with uv ink?The flexographic printing process determines that
the UV ink used should not have a high viscosity. Traditional flexographic printing inks are
solvent based and water-based. A large amount of solvent or water is needed to adjust
the viscosity. Because a large amount of solvent is used, most flexographic printing inks
are similar to Newtonian fluid in rheological properties, which will lead to ink sedimentation
and instability. Therefore, appropriate thixotropy of flexographic printing inks can prevent
pigment flocculation and sedimentation.
What is flexo printing with uv ink?UV flexographic printing ink uses active thinner to
reduce the viscosity of the system, so its viscosity may be higher than that of solvent
based flexographic printing ink on the whole. Although the viscosity of UV flexographic
printing ink is lower than that of screen printing and offset printing ink, the addition of
pigments will improve the viscosity, especially when the wetting, dispersion and stability of
pigments are not well handled. In addition, pigments play a more important role in the rheology of ink,
and appropriate thixotropy is beneficial. This is because when the molecular cross-linking inside the ink
reaches a certain degree and pseudoplasticity occurs, the viscosity of the ink system without pigment
dispersion stabilizer will drop sharply on the high-speed ink roller, but when it leaves the ink roller and
enters the printing part with relatively low speed, the viscosity will rise rapidly, and the wetting effect on
the substrate surface is too poor, Not suitable for printing. The ink containing appropriate dispersion
stabilizer has a certain stability, and its viscosity is not high. After high shearing, the viscosity
rises slowly, and the printing adaptability is good.
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