Application of the hottest UV curing ink in inkjet

Application of UV curing ink in inkjet printing

UV curing has been widely used in inkjet printing machines. UV curing ink has three characteristics: energy-saving drying, extensive printability to substrate, and high-speed curing can shorten the time of subsequent processes. For UV curing on inkjet printing machine, in addition to the above characteristics and the characteristics of digital processing, the manufacturing technology and control technology of inkjet printing head are constantly improving. Now the main applications are:

(1) printing of variable data such as identification

(2) wide image printing with few copies

(3) printing of substrate for non ink absorbing packaging

inkjet printing is completed by ink absorption of printing substrate, and UV inkjet printing machine is completed by high-speed polymerization and curing of photopolymerization ink. According to this feature, UV inkjet printing machine can meet a variety of needs, and use digital processing to meet production

1. Application of UV curing technology in inkjet printing

inkjet is a real non-contact printing, which has the effect of inking any substrate. In order to complete printing, UV curing ink can improve the shortcomings of inkjet

1) inkjet printer for marking

UV ink cured at high speed without infiltration and evaporation. Since it is non-contact, it has long been used to evaluate the pendulum impact energy value of thin film samples with this energy in terms of marking and other printing. The printing contents include commodity name, batch number, production date, barcode, address and other variable data, as well as anti-corrosion patterns and decorative graphics

printing machines for the above purposes use continuous and on-demand piezoelectric methods. Continuous printing expands the printing object due to multi spray and multi-color. As UV ink, it is not four-color printing, but focuses on spot color, using black, white, yellow, red, etc

2) graphic printer

UV inkjet printer for graphics uses pigment ink with excellent adhesion to achieve high image quality output by four-color overprint. UV inkjet printers for graphic printing were launched in 2000. Due to the large area, the printing for this purpose used to be mainly silk printing or electrostatic printing. For pop purposes such as large-area billboards, wallpapers, window billboards, hanging curtains, car interior decoration, etc., due to the small number of copies of printing, there is less restriction on ink and substrate, so it can give full play to the advantages of UV inkjet

oily ink will bring environmental pollution due to solvent volatilization, coupled with the constraints of a variety of plastic printing materials, and UV is the way to overcome the above two points and change to this aspect as soon as possible. The biggest contradiction is to deal with large-area printing materials, such as soft or hard plastics, non-woven fabrics, polyethylene, cloth silk, synthetic paper, etc. Take UV ink for example. In order to obtain the best image quality, different materials should use the corresponding ink

the graphic printing machine that fixes the printing head and relies on the high-speed transmission of the printing substrate to realize high-speed has been introduced. According to the assembly of printing head and lamp, the arbitrariness of printing format is obvious. Packaging and printing for samples and trial sales, or the application of similar silk printing, and combined printing with offset printing are gradually being applied

the use of multi-color narrow width printers has been popularized in the printing of non ink absorbing materials such as CDs, cards, trademarks, etc. Because the type of substrate is limited, It is very important to adapt to the ink with a wide range of uses that "the high viscosity of thermoplastic resin puts forward strict requirements for the impregnation method.

2. The composition of hardware and printing method

the composition of hardware is based on the consideration of movable part and fixed part, and the printing method is different.

(1) the position accuracy when the printing substrate is large and the action distance is long;

(2) the synchronization of inking and UV irradiation;

(3) The order and quality of inking in various colors

(4) distance adjustment between printing substrate and printing head

(5) printing speed

3. Most printing machines preset a variety of corresponding substrates to improve arbitrariness and expand scope

1) configuration of printing head and lamp

considering the relationship between curing time and wide width printing, the irradiation device adopts the structure of linkage with the printing head. The configuration of print head and lamp is different for descriptive action and printing action. For the roller feed type, the printing substrate to be moved on the roller can be configured in various ways

from the point of view of printing process, there are methods of curing after printing monochrome and irradiating with the printed full-color ink in turn, as well as methods of curing in a package after printing full-color, etc. the choice of which can effectively protect and prolong the service life of the experimental machine itself depends on the printing parts

2) print head

the print head on the UV inkjet printer has achieved good results until now. The new material industry in our province has a relatively complete range of continuous and piezoelectric types that can widely design the allowable range of ink

because of the high viscosity range of UV ink, the graining performance must be adjusted at any time, such as the transmission frequency used, the target droplet volume, and the ejection speed. The stability and quality of the main droplet and the inhibition of follow-up are very important. This kind of control is needless to say for image printing, but it is of high value for circuits. In order to improve the printing speed, many printing heads are often assembled, so the transmission technology of aggregation mode is very important