What factors affect the ink adhesion of wax-based carbon tape?

The ink adhesion of wax-based carbon tape is affected by a variety of factors, which can be summarized as follows:

First, the nature of the ink itself

1.Ink formula: The ink formula in the wax based carbon strip is the key, including the type and content of wax, the type and content of pigment, the proportion and nature of dispersant, solvent and other components. Unreasonable formulations may lead to decreased ink adhesion. For example, the choice and proportion of resin in the ink will directly affect its wettability and adhesion to the substrate.

2.Ink state: The physical state of the ink such as viscosity and drying speed will also affect its adhesion. Too thin or too thick ink may not be conducive to its adhesion to the substrate. In addition, too much solvent residue in the ink will also affect its curing effect, thereby reducing adhesion.

Second, the surface properties of the substrate

1.Surface tension: The surface tension of the substrate is an important factor affecting ink adhesion. If the surface tension of the substrate is lower than the surface tension of the ink, it is difficult for the ink to form a firm adhesion layer on the surface of the substrate. Increasing the surface tension of the substrate, such as through pretreatment (such as sanding, cleaning, etc.) or coating primer, can improve the adhesion of the ink.

2.Surface cleanliness: Impurities such as oil and dust on the surface of the substrate will prevent the direct contact between the ink and the substrate, thereby reducing the adhesion. Therefore, it is necessary to ensure the cleanliness of the substrate surface before printing.

Third, environmental conditions

1.Temperature and humidity: The temperature and humidity of the printing shop also have an impact on the adhesion of the ink. Generally speaking, as the relative humidity increases, the adhesion of the ink will initially increase but then decrease. Therefore, it is necessary to control the appropriate temperature and humidity conditions to ensure the adhesion of the ink. As for the waxy carbon strip, it is sensitive to temperature because of the waxy material in its composition. Too high or too low temperature may affect its adhesion effect.

2.Drying conditions: drying temperature and time are also key factors affecting ink adhesion. Proper drying temperature and time can promote the curing and adhesion of the ink. If the drying is insufficient or excessive, it may lead to a decrease in ink adhesion.

Fourth, printing process

1.Printing pressure: The size of the printing pressure directly affects the transfer and attachment of the ink on the substrate. The proper printing pressure helps the ink to form a uniform coating on the substrate and enhance its adhesion.

2.Printing speed: The speed of printing will affect the drying time and adhesion effect of the ink. Too fast a printing speed may cause the ink to be destroyed by subsequent operations before it is fully dried, thereby reducing adhesion.

In summary, the ink adhesion of wax-based carbon tape is affected by many factors such as the nature of the ink itself, the surface properties of the substrate, environmental conditions and printing process. In order to obtain good adhesion effect, it is necessary to consider these aspects comprehensively and take appropriate measures to optimize.