How to avoid ink drop during printing of BOPP synthetic label paper?

To avoid ink drop during printing of BOPP synthetic label paper, the following measures can be taken:

1、 Optimize the compatibility between ink and materials

Choose specialized ink:

For the printing of BOPP synthetic label paper, select specialized ink types such as chlorinated polyolefin composite ink or UV plastic ink, which usually have good adhesion and printing adaptability.

Ink and coating matching:

If the surface of BOPP synthetic label paper has a coating, ink that matches the coating resin should be selected to ensure that the resin in the ink can firmly fuse with the resin in the coating and avoid ink detachment.

Ink quality:

Use high-quality ink and avoid using expired or inferior ink, which may result in poor printing quality, including ink loss.

2、 Improve printing process conditions

Corona treatment:

Perform corona treatment on BOPP synthetic label paper to increase its surface energy and improve ink adhesion. Corona treatment should be carried out regularly, especially when the surface energy of the material fades over time.

UV drying:

If UV ink is used for printing, it should be ensured that the energy of the UV lamp is sufficient, and there is no aging phenomenon in the lamp tube and reflector. At the same time, adjust the output power of the UV lamp reasonably to avoid material deformation and decreased ink adhesion caused by excessive irradiation.

Printing pressure:

Adjust the printing pressure to an appropriate range to ensure that the ink can be fully transferred to the label paper, while avoiding excessive pressure that may cause distortion of the text or ink to be squeezed out of the edges.

Ink layer thickness:

Properly control the thickness of the ink layer to avoid insufficient drying or ink accumulation caused by excessive ink layer thickness, resulting in ink loss.

3、 Strengthen material quality control

Surface coating:

Ensure that the surface coating quality of BOPP synthetic label paper is good, as poor coating may cause extensive ink peeling.

Material flatness:

Choose BOPP synthetic label paper with good flatness to avoid color difference and ink drop caused by poor reproduction of printing dots due to differences in material flatness.

Material tension:

During the printing process, maintain the stability of material tension to avoid uneven tension that may cause deviation during printing, affecting the accuracy of overprinting and ink adhesion.

4、 Other precautions

Dust removal treatment:

Before printing, the BOPP synthetic label paper should be treated with dust removal to avoid the formation of white spots or ink loss during printing due to dust on the material surface.

Storage environment:

Ensure that BOPP synthetic label paper is stored under suitable humidity and temperature conditions to avoid environmental factors affecting the printing performance and ink adhesion of the material.

Regular maintenance:

Regularly maintain and upkeep printing equipment to ensure its good condition and avoid poor printing quality and ink loss caused by equipment malfunctions.

In summary, by optimizing the matching between ink and materials, improving printing process conditions, strengthening material quality control, and paying attention to other related matters, the ink drop phenomenon of BOPP synthetic label paper during printing can be effectively avoided.