How does BOPP thermal synthetic paper work?

The working principle of BOPP thermal synthetic paper is mainly based on the characteristics of its thermal coating. This paper is coated with a special layer of "thermal paint" (thermochromic layer) on high-quality base paper, which contains chemicals capable of thermal reactions.

Specifically, the working principle of BOPP thermal synthetic paper can be summarized as the following steps:

1.Thermal coating composition: Thermal coating is mainly composed of colorless dyes (dark dyes), color development agents, sensitizers, fillers, adhesives, stabilizers and lubricants. Among them, colorless dyes are colorless at room temperature, but they have heat-sensitive characteristics and can change color at specific temperatures; Color developing agents are used to react with colorless dyes to produce visible colors.

2.Heating reaction: When the BOPP thermal synthetic paper encounters a heat source (such as the print head of a thermal printer), the high temperature generated by the print head causes a chemical reaction between the colorless dye and the color developer in the thermal coating. This reaction causes the colorless dye to change into colored compounds, which can display information such as text, graphics or barcodes on the surface of the paper.

3.Color rendering and preservation: With the transfer of heat and the chemical reaction, the colorless dye in the thermal coating gradually transforms into a colored state, forming a clearly visible print content. However, it should be noted that the color rendering on thermal paper is not very stable and is susceptible to environmental factors (such as light, humidity, temperature, etc.) and fading. Therefore, when selecting BOPP thermal synthetic paper, it is necessary to consider its preservation performance and durability.

In summary, the working principle of BOPP thermal synthetic paper is to achieve the rapid printing of information such as text, graphics or bar codes through the biochemical reaction of the chemical substances in the thermal coating under heating conditions. However, due to the instability of its color rendering handwriting, it is necessary to pay attention to avoid the influence of environmental factors in the process of use and preservation.