Tv Stand,Led Tv Stand,Wall Mount Tv Stand,Tv Stand With Mount DUOBUY TECHNOLOGY SHANDONG CO., LTD. , https://www.doubuytech.com
First of all, from the point of view of the definition of RFID, intelligence refers to radio frequency circuits composed of chips, antennas, etc., while labels are printed by the label printing process to make commercially available coats of radio frequency circuits. From a printing point of view, the emergence of RFID will bring higher gold content to traditional label printing. The RFID chip layer can be packaged and printed with materials such as paper, PE, PET, and even textiles to make self-adhesive stickers, paper cards, tags, or other types of tags. The chip is the key to RFID and is determined by its special structure. Can not withstand the pressure of the printing press, so, in addition to inkjet printing, it is generally used to print the surface layer, and then with the chip layer composite, die-cutting process.
1. Printing method
Printing is mainly based on screen printing. This is mainly because the printing quality of screen printing in integrated circuit boards, membrane switches, etc. cannot be achieved by other printing methods. In RFID printing, conductive ink is used, and printed conductive The preferred screen for the ink is a nickel foil perforated screen. It is a kind of high-tech wire mesh. It is not a wire mesh woven from general metal or nylon wire, but a foil mesh drilled from nickel foil. The mesh is hexagonal and can also be formed by electrolytic forming. Hole shape. The entire surface of the mesh is even and thin, which can greatly improve the stability and precision of imprinting. It is effective for printing high-tech products such as conductive inks, wafers, and integrated circuits. It can resolve the circuit line interval of 0.1 mm and the positioning accuracy can be improved. 0.01mm.
2, the application of conductive ink
Conductive ink is a kind of special ink. It can add conductive carrier to UV ink, flexographic water-based ink or special offset ink to make the ink conductive.
Conductive inks are mainly composed of conductive fillers (including metal powders, metal oxides, non-metals, and other composite powders), linkers (mainly synthetic resins, photosensitive resins, low-melting-point organic glasses, etc.), additives (mainly dispersants, and adjustments). Agents, thickeners, plasticizers, lubricants, inhibitors, etc.), solvents (mainly aromatics, alcohols, ketones, esters, alcohol ethers, etc.), conductive inks are a type of functional ink, mainly in printing. There are carbon paste, silver paste and other conductive inks. Carbon paste ink is a liquid type thermosetting ink. It has the function of protecting copper foil and conducting current after film curing. It has good conductivity and low resistance. It is not easy to oxidize, stable performance, acid, alkali and chemical solvents. The erosion; has strong wear resistance, anti-wear, good thermal shock resistance and other characteristics. Silver paste ink is a one-component ink composed of ultra-fine silver powder and thermoplastic resin. It can be used on PET, PT and PVC sheets. It has strong adhesion and hiding power, low temperature curing, and controllable conductivity. And a very low resistance value. In addition, conductive nanometer carbon ink is added to the conductive ink made of ink, and conductive ink can also be made of metal powder (such as silver powder) into nanometer silver powder. This conductive ink is not only a printed film. Thin and uniform smooth, excellent performance, but also can save a lot of material.
In RFID printing, conductive inks are mainly used to print RFID large lines, replacing traditional metal foils produced by foil or etching methods. It has two main advantages. First of all, the traditional metal foil made by the foiling method or etching method has a complicated process and a long time for the production of the finished product. The application of the conductive ink to print the antenna is a high-speed printing method, which is efficient and fast, and is a printed antenna. The fastest and cheapest method of choice in the circuit.
Today, conductive inks have begun to replace etched antennas in various frequency bands, such as the ultra-high frequency bands (860 MHz to 950 MHz) and the microwave frequency band (2450 MHz), and antennas printed with conductive ink can be compared to conventionally etched copper antennas. In addition, conductive inks are also used to print sensors and circuit printed in RFID. Secondly, the traditional metal foils produced by foil-pressing or etching methods consume wasted metal materials at a high cost, while the raw material cost of conductive inks is lower than traditional metal antennas, which is of great significance for reducing the production cost of RFID. .
3, unique process requirements
In the RFID printing industry, there are unique requirements for the production process, and high yield, thick paper printing, and composite processing should be paid attention to.
In terms of high yields, since the value of RFID itself is many times higher than that of ordinary printed labels, the high yield of printed materials is particularly important while bringing high profits to the company. In particular, many products require multi-color UV ink printing, glazing, and gluing. Most of the large-volume labels are also processed by roll-to-roll printing or no-interface printing (through-pass), due to a large number of processing operations. Big difficulty in screening the finished product.
For thick paper printing, in the paper jamming process, it must be noted that the equipment must have good printability for 350-gram-thick paperboard, and the tension of the paper-tape should be kept stable in the paper-card printing to ensure that the accumulated overlay error is minimized. Therefore, if each frame is overlaid accurately, but the space between the frames has a large error, it will cause troubles for the compounding and die-cutting process after RFID printing. As for composite machining, it is a key process in RFID processing. It not only requires that the size between each label does not change due to tension change, but also for film materials, it also needs to consider the degree of increase in label spacing caused by tensile deformation, and to do Appropriate adjustments.
RFID screen printing technology: not a beautiful coat under the ordinary label
There is a big difference between RFID production and traditional label printing. At present, China's traditional label printing technology has a very high level. There is no lack of experienced companies in the trademark printing industry, but also produces many beautifully designed and high-quality products. , But for RFID, some people think that it has nothing special, as long as it is covered with a plain label on a beautiful coat, which is not difficult for high-quality label printing companies, but simply adding a beautiful coat RFID, for its high added value will cause significant losses. So what are the characteristics of RFID printing compared to traditional label printing?