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Digital thermal transfer printer
- May 31, 2018 -

Technological innovation usually means that new technologies can bring higher product quality, faster production speeds, lower production costs, more reliable handling performance and higher product added value.

Digital thermal transfer printer is mainly composed of print head, print ribbon and controller. The printhead usually contains 8 to 12 dots per millimeter or 200-300 dots per inch (DPI). These points can be turned on and off in rapid succession,this transfers the ink from the ribbon to the film to print the image. By digital means, coders can print "in real time", also batch number and date information can be changed very quickly for intermittent and continuous packaging.

Thermal transfer printers use two types of print heads: flat and near-edge. Among them, the flat print head is a earlier technology. Although the cost is low, the resolution and the printing speed of the print image are not ideal. The near-edge print head technology is new and can provide faster print speed and higher resolution. Some recently introduced thermal transfer printers mostly use near-edge printheads, such as Marken's SmartDate and 18 series thermal printers.

The thermal transfer ribbon is usually a three-layer structure consisting of a backside coating, a PET film, and an ink layer.

The surface coating improves the adhesion of the ink and improves the resistance of the ribbon to chemical and environmental factors. The ink layer is a mixture of wax, resin, and pigment used to print images on the film surface, while an electrostatic coating (usually silicone) can lubricate and reduce static electricity to protect the print head.

Ink is divided into "soft ink" and "hard ink". Soft ink is mainly composed of wax and pigment. The melting point and the energy of the print head that needs to transfer the ink to the substrate are relatively low, and are mainly used for paper materials. Hard ink consists of high-melting-point synthetic chemicals and pigments, requiring the print head to have high energy to transfer the ink to the substrate, mainly for polyethylene or in low temperature environments;Combining the wax and the resin allows the ink layer to have the advantages of both Soft ink and Hard ink, high speed printing, and good adhesion on most packaging films, and is suitable for most applications.

In general, the adhesion of the thermal transfer ink is proportional to the cost, the higher the ink adhesion, the higher the cost.

Digital thermal transfer suppliers will generally provide intermittent, continuous, and other types of equipment to accommodate vertical form-fill-seal lines (VHHS) or horizontal form-fill-seal machines (HFFS) such as Marken's SmartDate 2 / 3, 18 series heat transfer coder has intermittent, continuous type. In addition, there are also the latest batch-continuous integrated device models to choose from.

Digital thermal transfer printers have technical advantages and practical advantages over conventional Hot Stamp ribbon Coder, Ink Roller coder or continuous inkjet coders.

First of all, digital thermal transfer printers do not use Brass letter, so there is no need to align and adjust small Brass letter, thereby avoiding the danger that Brass letter falling into the food or breaking the film, and there is no cost in the change of Brass letter; Secondly, digital thermal transfer printer can provide high-quality coding effects. The resolution of coded images can reach up to 300dpi, and the print quality is consistent and stable. Special characters and barcodes can be printed, and a large number of graphics or special characters can be pre-stored in the gallery, automatically change the code without downtime or human error, thereby maintaining a high level of production capacity; can print real-time information, improve product traceability, which is particularly important in today's increasingly focused on food and drug safety.