Solvent-free laminating in which the printing ink is haloed.
Printing ink is “stained”
In the implementation of solvent-free composite process, the phenomenon is not a common anomaly (but once encountered, the consequences may be very serious), there does not seem to be a fixed or standardized terminology, some people figuratively referred to as “ink and glue miscible”, some people call it “ink is haloing “.
1, the problem case (Figure):
(1) Problem samples 1: after compounding the red ink edges produce halo phenomenon, replace the red ink, the phenomenon disappeared.
(2) Problem sample 2: green ink and adhesive “miscible”, replace the green ink, the phenomenon disappears.
Cause analysis:
This is a physical phenomenon. Solvent-free adhesive formula design, will contain some permeability of the components, when it comes into contact with the ink, if the ink also contains components that are easily dissolved in the component, it will cause the second dissolution of the ink, resulting in the formation of “halo” (or “miscible”). phenomenon).
Solution:
This printing ink is “miscible” phenomenon, generally by adjusting the ink to solve the problem.
Key words:
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