How to choose a roller suitable for BOPP synthetic paper printing?

When selecting a roller suitable for BOPP synthetic paper printing, several factors need to be considered to ensure the best printing results. Here are some key points to choose from:

1. The number of lines of the roller

Definition of the number of lines: the number of lines of the roller refers to the number of holes per inch of length, which determines the ink transfer ability of the roller.

Selection principle: In general, the number of lines of the roller should be four or five times the number of cables added to the printed parts. For BOPP synthetic paper printing, the selection of the specific number of lines must also be combined with the actual production of the printed image. If the print requires higher precision and detail expression, you can choose a higher number of lines roller.

2. Engraving Angle of roller

Common engraving Angle: The 60° engraving Angle of the roller is usually used in most printing operations, because the 60° roller has shown its advantages when releasing ink. Although laser-carved rollers can be carved into 30° and 45° structures, 60° angles are more common and applicable.

Selection suggestion: For BOPP synthetic paper printing, if there is no special requirement, it is recommended to choose a 60° engraving Angle of the roller.

3. Ink hole capacity of roller (BCM value)

The ink hole capacity refers to the amount of ink that each ink hole on the roller can hold, usually expressed in BCM (billion cubic microns/inch).

Selection principle: The choice of ink hole capacity depends on the type of print and the required ink layer thickness. For BOPP synthetic paper printing, if the print needs a thicker ink layer, the mesh roller with larger ink hole capacity should be selected; On the contrary, if the printed matter requires a thin ink layer, a mesh roller with a smaller ink hole capacity should be selected.

4. Roller material and surface treatment

Material classification: Mesh roller according to its surface coating or spraying material classification, there are mainly chromium plated mesh roller and ceramic mesh roller two.

Selection suggestions:

Chrome-plated roller: low cost, but the wear resistance is relatively poor, suitable for printing occasions with low wear resistance requirements.

Ceramic roller: with high hardness, high wear resistance, chemical corrosion resistance and other characteristics, although the cost is high, but the service life is long, suitable for high printing quality and stability requirements, such as BOPP synthetic paper printing.

5. Other precautions

Matching with ink supply system: Ensure that the selected roller is matched with the ink supply system of the printing press to ensure smooth ink transfer and stable printing effect.

Maintenance and maintenance: In the process of use, attention should be paid to regular maintenance and maintenance of the roller, to avoid scratching, collision and other damage, in order to extend its service life and maintain a good printing effect.

In summary, when selecting a roller suitable for BOPP synthetic paper printing, it is necessary to consider multiple factors such as the number of lines, engraving Angle, ink hole capacity, material and surface treatment, and make a reasonable choice combined with the actual production situation.