The hottest digital heat transfer technology impro

2022-07-26
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Digital heat transfer technology improves the coding level of flexible packaging

flexible packaging is the most important category in the packaging industry, and the output value of flexible packaging products exceeds more than half of the packaging industry

various paper, plastic, paper plastic, plastic plastic and plastic aluminum soft bags 3 The personnel training package is widely used to package leisure food, dry goods, baked goods, candy, chocolate, sliced frozen fresh food, frozen food, coffee, tea, powdered food, bagged medicine, hardware parts and other commodities

in order to ensure the safety of food and drugs, printing the production date, product batch number and other real-time information on the flexible packaging of food and drugs has become an important part in the production process of food and drugs. Real time information enables manufacturers to track products when needed and provide protection when products are recalled on a large scale. It can be said that coding technology has become an important part of the modern quality system

introduction to flexible packaging coding technology

the traditional flexible packaging coding technology relies on relief printing and uses the words on the word frame to create images. The image is mechanically imprinted or rolled onto the film surface

common relief printing technologies include hot coding, wet ink and one touch dry ink wheel coding. Chinese plastic machinery enterprises have expanded their development in emerging markets of extruders in recent years

in recent years, continuous inkjet printing system (CIJ) has also been applied in flexible packaging. The inkjet printer inks through the print head to print a variety of data on primary packaging and cartons, including simple date codes, logos, bar codes and serial numbers

the traditional relief printing technology and the continuous inkjet printing system have their own advantages, but they also have many shortcomings. For example, the traditional hot carbon tape printer and ink wheel printer cannot print in real time, and need to manually update the date and batch number, which limits the traceability; In printing, there is no standard logo, bar code or rotating image printing method, and each printed character needs a word grain. In production, the warm-up time is required before the operation of the hot carbon tape printer, and the cooling time is required to change the information, which will prolong the production time. Once the word size is not aligned accurately, the packaging film will be broken. This book includes the analysis of the composite material market and material potential. In addition, the printed results cannot be read due to the wear or loss of word particles, and the length of hot carbon ribbon is relatively short. The average length of domestic carbon ribbon is only 100 meters; The ink on the ink wheel printer needs time to dry or may produce stains. The stains need to be cleaned with special cleaning liquid. In addition, most ink wheels need to be preheated (it takes up to 30 minutes to heat the ink wheel before printing), and they need to be cooled before changing the printing content

the continuous inkjet printer has the advantages of wide application range and simple operation, but the font, character options, identification or bar code functions are limited, the printing quality is average, the printing direction must be consistent with the moving direction of the substrate, and the print head needs to be cleaned regularly, the filter needs to be replaced regularly, and the floor, machine, conveyor belt, etc. contaminated by ink need to be cleaned. The special ink and solvent used usually contain harmful substances, Ventilation, exhaust, etc. may be required

the latest laser and digital heat transfer printer can greatly improve the problems existing in the traditional printer. In particular, the digital heat transfer printer can not only improve the coding quality, but also improve the traceability of products and the reliability and flexibility of equipment. It is suitable for all kinds of soft packaging materials

technical advantages of digital heat transfer printing

technological innovation usually means that new technologies can bring higher product quality, faster production speed, lower production cost, more reliable operation performance and higher product added value

the digital heat transfer printer is mainly composed of a print head, a print ribbon and a controller. The print head usually contains 8 to 12 dots per millimeter or dots per inch (DPI), which can be quickly and continuously switched to transfer ink from the ribbon to the film to print images. Due to the use of digital means, the code printer can print in real time, and can very quickly change the batch number and date information for intermittent and continuous packaging

the heat transfer printer mainly uses two types of print heads: flat head type and bevel type. The flat head print head belongs to the earlier technology. Although the cost is low, the resolution and printing speed of the printed image are not ideal; The bevel print head technology is new, which can provide faster printing speed and higher resolution. Some newly launched heat transfer printers mostly use bevel print heads, such as Marken's smartdate and 18 series heat printers

the heat transfer ribbon is usually a three-layer structure composed of a back coating, a PET film and an ink layer

surface coating can improve the adhesion of ink and the resistance of ribbon to chemical substances and environmental factors. The ink layer is a mixture of wax, resin and pigment, which is used to stick to the film surface to print images; The 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, and the melting point and the energy of the print head that needs to transfer the ink to the substrate are relatively low, which is mainly used for paper materials; Hard ink is composed of synthetic chemicals and pigments with high melting point. It requires high energy of the print head to transfer the ink to the substrate. It is mainly used for polyethylene or in low temperature environment; The combination of wax and resin can make the ink layer have the advantages of both inks, realize high-speed printing, and form good adhesion on most packaging films, which is suitable for most application fields

generally speaking, the adhesion of heat transfer ink is directly proportional to the cost. The higher the adhesion of ink, the higher the cost

digital heat transfer printing suppliers generally provide intermittent, continuous and other different types of equipment to cooperate with vertical forming filling sealing production line (VHHs) or horizontal forming filling sealing machine (HFFs). For example, Marken's smartdate2/3 and 18 series heat transfer machine coding machines have intermittent and continuous types. In addition, the latest intermittent continuous integrated equipment models are available

on the intermittent packaging line, when the film is stationary, the print head bracket moves on the packaging film. The stepping rate of the print head carriage motor is directly related to the linear motion of the carriage, and the time length of point energization is determined according to the linear speed; On the continuous and immediate reversing proportional valve oil supply packaging line to the other chamber of the oil cylinder, pictures and texts are printed when the packaging film moves. The length of time the point is powered on is determined by the ribbon speed, which is controlled by the data provided by the high-speed synchronizer. The control box determines which points will be powered on and when. Compared with traditional thermal carbon printer, ink wheel printer or continuous ink jet printer, digital thermal transfer printer has technical advantages and practical benefits

first of all, the digital heat transfer printer does not use words, so there is no need to arrange and adjust small words, thus avoiding the risk of words falling into food or breaking the film, and there is no cost of replacing words; Secondly, digital heat transfer printing can provide high-quality coding effect. The maximum resolution of coding image can reach 300 dpi, and the printing quality is consistent and stable; It can print special characters and bar codes, pre store a large number of graphics or special characters in the library, and automatically change the code without shutdown or human error, so as to maintain a high level of production capacity; Real time information can be printed to improve product traceability, which is particularly important today when food and drug safety is increasingly emphasized

affordable digital heat transfer technology

although digital heat transfer coding is the latest identification technology, it is not unattainable. In fact, digital heat transfer coding machine is a product that ordinary users can also afford. At the same time, it is also a reliable technology. So far, Marken has installed more than 40000 heat transfer printers worldwide, making it not only unique in the laser printer market, but also a leader in the field of digital heat transfer printers

at present, there are not many manufacturers that can provide digital heat transfer printer. However, since Marken successfully launched digital heat transfer equipment in the world, the huge market has attracted some inkjet machine manufacturers such as weidijie to launch corresponding products

following smartdate2/3 and 5 series, Marken launched 18 series of low-cost heat transfer printer in November2006, thus forming a complete product series in the digital heat transfer printer market. Users can choose the heat transfer printer suitable for their own needs according to the coding quality, production speed and materials used

take maken 18 series heat transfer code printer as an example. This series of equipment uses wax/resin ribbon, which is suitable for printing on many films, with very high adhesion and printing quality, while maintaining low cost. Its print head is 32mm, the print resolution is 8 points/mm, and 200dpi. The printer supports printing of special fonts, bar codes and identifications, as well as variable data printing of warranty dates. Its image memory can also pre store up to 100 images, and the maximum color band length can reach 500 meters

it is worth mentioning that the 18 series heat transfer printer supports USB interface. Customers can change the coding content by using only a small USB disk, making the field operation more simple and flexible

18 series heat transfer printing has intermittent type 18i and Continuous Type 18C. The 18i intermittent code printer prints an image by moving the print head when the packaging material stops, while the ribbon remains stationary during printing; 18C continuous code printer is used to print when the packaging material moves, and the color band moves at the same speed as the packaging material

although the current digital heat transfer printer is more expensive than the traditional heat printer and ink wheel printer, its excellent coding quality, real-time coding function and flexibility in font, icon and barcode printing meet the strict requirements of today's food and drug packaging, raise the coding level of flexible packaging to a new level, and provide the most ideal flexible packaging identification solution at present

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