In the previous article, we mentioned 2 problems that often occur when pre-coating film is used. In addition, there is another common problem that often bothers us-low adhesion after laminating.
Let’s examine the possible causes of this problems
Reason 1: The ink of the printed matters is not completely dry
If the ink of the printed matter is not completely dry, the viscosity may decrease during lamination. Undried ink may be mixed in the pre-coated film during the lamination process, resulting in a reduction in viscosity
So before laminating, make sure that the ink is completely dry.
Reason 2: The ink used in printed matter contain excess paraffin, silicon and other ingredients
Some ink may contain excess paraffin, silicon and other ingredients. These ingredients may affect the viscosity of the heat laminating film, resulting in a decrease in viscosity after coating.
It’s suggested to use Eko’s digital super sticky thermal lamination film for this kind of presswork. Its super strong adhesion can easily solve this problem.
Reason 3: Metallic ink is used
Metallic ink often contain large amounts of metal particles that react with the heat lamination film, causing a reduction in viscosity.
It’s suggested to use Eko’s digital super sticky thermal lamination film for this kind of presswork. Its super strong adhesion can easily solve this problem.
Reason 4: Excessive powder spraying on the surface of the printed matter
If there is too much powder spraying on the surface of the printed matter, the thermal laminating film may be mixed with the powder on the surface of the printed matter during lamination, thereby reducing the viscosity.
So it’s important to control the amount of powder spraying.
Reason 5: The moisture content of the paper is too high
If the moisture content of the paper is too high, it may release water vapor during lamination, causing the viscosity of the thermal lamination film to decrease.
Reason 6: The speed, pressure, and temperature of the laminating are not adjusted to appropriate values
The speed, pressure, and temperature of the laminating will all affect the viscosity of the pre-coated film. If these parameters are not adjusted to appropriate values, it will be detrimental to the viscosity control of the pre-coated film.
Reason 7: The thermal lamination film has passed its shelf life
The shelf life of the thermal laminating film is usually about 1 year, and the use effect of the film will decrease with the time of placement. It is suggested to use the film as soon as possible after purchase to ensure better results.
Post time: Nov-23-2023