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Production and improvement of carbon deposition during thermosensitive printing

Production and improvement of carbon deposition during thermosensitive printing

(Summary description)In the background With thermal printing is widely used in retail, gaming, finance, logistics, clothing, medical and other fields, in order to meet a variety of applications, and the coating formula of the thermal medium is different, sometimes due to unreasonable or reasonable thermal medium coating thermal print head and printer design is not used, resulting in thermal medium molten material can not be very good the absorption to produce carbon (Sludge), heat bonded in the print head body, which affect the print quality and even destruction of the thermal print head.

Production and improvement of carbon deposition during thermosensitive printing

(Summary description)In the background

With thermal printing is widely used in retail, gaming, finance, logistics, clothing, medical and other fields, in order to meet a variety of applications, and the coating formula of the thermal medium is different, sometimes due to unreasonable or reasonable thermal medium coating thermal print head and printer design is not used, resulting in thermal medium molten material can not be very good the absorption to produce carbon (Sludge), heat bonded in the print head body, which affect the print quality and even destruction of the thermal print head.

Information

In the background

With thermal printing is widely used in retail, gaming, finance, logistics, clothing, medical and other fields, in order to meet a variety of applications, and the coating formula of the thermal medium is different, sometimes due to unreasonable or reasonable thermal medium coating thermal print head and printer design is not used, resulting in thermal medium molten material can not be very good the absorption to produce carbon (Sludge), heat bonded in the print head body, which affect the print quality and even destruction of the thermal print head.

- carbon generation mechanism

If the thermal paper is heated and colored, if the absorbency is not good, the thermal paper will leave the high temperature heating body while the melt will cool and solidify, part of it will be taken away by the paper tape and the other part will stick to the heat sensitive printhead (TPH) and accumulate carbon deposit. A schematic diagram of carbon production is shown as shown in Figure 1.

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- carbon deposition phenomenon

In the printing process of the thermosensitive printer, black or white carbon deposition will be produced on the print head, which will lead to the heat of the printing head.

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Feasibility study report

The paper prints white or white lines with poor contact. The phenomenon of carbon accumulation is shown in Figure 2 and undesirable pattern 3.

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The normal print print product after 3 carbon carbon poor print schematic proofs

- influencing factors

In accordance with the degree of influence from large to small, the following are:

The characteristics of thermosensitive medium, thermal printing head structure, printer structure, printing energy, pressure, ambient temperature and humidity, etc.

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In the improvement of carbon deposition

We can reduce carbon deposition by adjusting the structural structure of the thermosensitive printing head to make carbon easier to discharge.

Accumulation. However, the main source of carbon deposition is still the characteristics of the thermal medium, in order to compare the differences between different media.

We have conducted a comparative experiment on carbon deposition at home and abroad, and the results of 3 representative paper experiments are shown in Table 2.

Table 1 carbon deposition compared with 3 different kinds of paper

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According to the comparison results of Table 2, under the same Inca test conditions, different thermosensitive media produce obvious carbon deposition differences:

Therefore, carbon deposition has a great relationship with the coating of thermosensitive paper, the organic and inorganic composition of the thermosensitive layer and the coating process. By 3

The test results of the paper show that the difference of the different heat sensitive paper is very big, which shows that the improvement space is also great.

Improving the structure of the thermosensitive printing head and adjusting the printing condition can reduce the carbon deposition, but can not completely eliminate the product from the root.

Carbon, so it is necessary to improve the heat sensitive paper.

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