How to improve the adhesion of ink on tag coated paper?

To improve the adhesion of the ink on the tag coated paper, you can start from the following aspects:

First, choose the right ink

1.Matching: Ensure that the selected ink and the tag coated paper have a good match. Different types of inks have different adaptability to different substrate materials, so it is important to choose the ink suitable for coated paper.

2.Resin content: Resin is the central material of ink bonding material, which directly affects the fixation fastness. For coated paper, you can choose an ink with moderate resin content and strong viscosity to improve adhesion.

Second, optimize the printing process

1.Layout cleaning: Before each printing, ensure that the layout is clean and free of dust, dirt and other debris. Professional cleaning agents and soft cloths can be used to clean to ensure that the ink can be evenly and firmly attached to the coated paper.

2.Printing pressure and speed: Adjust the printing pressure and speed to the best state. Excessive pressure will damage the surface of coated paper and affect the adhesion; Too little pressure may lead to poor ink adhesion. At the same time, printing speed is too fast or too slow may also affect the uniformity and adhesion of the ink.

3.Drying time: Adjust the drying time of the ink according to the characteristics of the ink and the material of the coated paper. Ensure that the ink is fully cured on the coated paper to improve adhesion.

Third, pretreatment of coated paper

1.Surface treatment: Because the surface of the coated paper is smooth and the ink absorption ability is poor, the surface finish can be improved by grinding, polishing and other methods, so as to increase the combination between the ink and the coated paper. At the same time, it can also be considered to use chemical treatment methods, such as corona treatment, plasma treatment, etc., to change the polarity of the surface of the coated paper, so that it is easier to combine with the ink.

2.Decontamination treatment: The use of decontamination agent to remove oil, fingerprints and other pollutants on the surface of coated paper to ensure that the ink can be firmly attached to the clean paper.

Fourth, add additives

1.Adhesive: Add an appropriate amount of adhesive to the ink to enhance the adhesion of the ink to the coated paper. The adhesive can chemically react or physically adsorb the surface of the coated paper to improve the fixation effect of the ink.

2.Leveling agent: The addition of leveling agent helps the ink spread evenly on the coated paper, reduce the generation of bubbles and pinholes, and further improve the adhesion of the ink.

Fifth, other precautions

1.Ink quality: Ensure that the quality of the ink used is reliable and avoid the use of expired or deteriorated ink.

2.Environmental control: Keep the temperature and humidity of the printing shop appropriate to avoid the impact of extreme weather on the printing process and ink adhesion.

3.Regular maintenance: Check and maintain the printing equipment regularly to ensure that the equipment is in good condition to avoid poor printing caused by equipment problems.

To sum up, improving the adhesion of the ink on the tag coated paper requires comprehensive consideration of ink selection, printing process optimization, coated paper pretreatment, additive addition and environmental control. By taking the above measures, the adhesion of the ink on the coated paper can be significantly improved, thus improving the quality and stability of the printed matter.