A thermosensitive recording composite material and its production process

Abstract

The invention provides a heat-sensitive recording composite material and a production process thereof. The heat-sensitive recording composite material sequentially comprises a carrier, a middle coating and a thermosensitive recording layer, wherein a protective layer is arranged on the thermosensitive recording layer, and the protective layer is a BOPET film. According to the heat-sensitive recording composite material and the production process thereof, the BOPET thin film with the special performance is used for protecting a heat-sensitive color developing layer, solvent resistance, scratchresistance and the like are obviously improved, the production process is simplified, and production cost is greatly reduced.

Description

technical field [0001] The invention belongs to the technical field of heat-sensitive recording materials, and in particular relates to a heat-sensitive recording composite material and a production process thereof. Background technique [0002] Thermal recording materials are widely used in manufacturing, logistics, supermarkets and other industries to print digital printing materials with variable information such as barcodes, two-dimensional codes, characters, numbers, and patterns. At present, there are mainly two kinds of heat-sensitive recording materials, one is to coat heat-sensitive coating on the surface of paper, called heat-sensitive paper; the other is to coat heat-sensitive coating on the surface of plastic film, called heat-sensitive film. [0003] Thermal paper is used in normal temperature and humidity environment, and thermal film is mainly used in low temperature and humid environment. The common feature of these two types of thermal recording materials is...

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Problems solved by technology

[0003] Thermal paper is used in normal temperature and humidity environment, and thermal film is mainly used in low temperature and humid environment. The common feature of these two types of thermal recording materials is that a thermal coating is applied on the surface of the substrate, and the thermal coating directly exposed to the external environment, its structure diagram is shown in figure 1 , figure 1 Middle, 11. Protective layer; 12. Thermosensitive recording layer; 13. Undercoat layer; 14. Carrier material, figure 1 It shows that the existing heat-sensitive recording material is first coated with a primer layer 13 on the carrier material 14, dried, then coated with a heat-sensitive recording layer 12, and then coated with a protective layer 11 after drying. The performance of the protective layer 11 determines the heat-sensitive material. Record the quality of the material. If the protective layer is too thick, it will affect the printing quality. If it is too thin, the protective performance will be poor. However, since the thickness of the protective layer must not be greater than 2μm, it is difficult to achieve a smooth surface. The life of the print head has a great influence

[0004] According to the requirements of the use environment, the heat-sensitive color-developing layer must have the performance of moisture resistance, scratch resistance, ethanol gasoline and other organic solvents, but because the material of the heat-sensitive color-developing layer itself is afraid of water, it is easy to deteriorate when exposed to water, which affects the shelf life , which puts forward higher requirements on the formula design of the heat-sensitive color-developing layer, paint manufacturing and coating process, and further increases the manufacturing cost

In the production process of heat-sensitive recording materials, it is often necessary to design a multi-layer structure such as a primer layer, a heat-sensitive coating layer, and a protective coating. The formulation cost is high and the coating process is complicated.

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