Screen printing UV ink and its use (on)

Abstract This article briefly introduced the characteristics, methods of use and precautions of UV inks for screen printing.

Keywords UV ink screen printing

I. Introduction

UV inks have become increasingly popular in many industries for their unique advantages. UV ink has the characteristics of non-volatile solvent, no odor, no stimulation, good leveling, no blocking mesh, fast curing speed, tough cured film, strong water resistance, solvent scrubbing, good adhesion fastness, and vivid colors , To meet the characteristics of thick ink screen printing, it is particularly suitable for use in a number of occasions require a thicker ink to have a good performance in specific occasions, such as foam ink, wrinkle ink and so on. The raw materials for screen printing UV inks are basically raw materials, resins, and the like for producing Other UV inks.

Second, UV screen printing ink types and characteristics

There are many types of UV screen printing special inks, which are briefly described as follows:

1. UV ice ink UV ice ink is a colorless, transparent or colored oily fluid. Under ultraviolet irradiation, the ink layer gradually shrinks to form ice crack patterns of different sizes and has a strong flash effect and three-dimensional effect. The size and shape of the ice flower have a certain relationship with the thickness of the ink layer. The solidified ice has a strong three-dimensional effect, a good flash effect, and a variety of colors. In addition to the printable gold and silver cardboard and the packaging box, it can also print metal. , plastic film, glass and other substrates.

2. UV foaming ink UV foaming ink is used to print PET gold cardboard and high-grade packaging boxes, and can also be printed on PET film, PVC, ABS and mirror metal substrates, such as copper, aluminum, stainless steel, etc., to produce high-grade signs or The panel, with the help of the reflective material of the substrate and the unique pattern of the ink, makes the surface of the print more gorgeous.

3. UV crystal ink UV crystal ink is colorless, odorless, crystal clear, non-volatile, not yellow after curing, printed lines do not spread, transparent like crystal, can be used for a variety of crystal signs, decorative glass, packaging and braille printing, printing Select the ink according to the type of substrate.

4. After the UV expansion ink is rapidly cured by ultraviolet rays, the volume of the coating film can be expanded by 5 to 10 times, and gold and silver powder can be added to increase the ink type. UV-expanded ink prints are brightly colored with a strong sense of relief. Due to its low expansion temperature, it is particularly suitable for materials with poor heat resistance and is an ideal product to replace conventional foaming pastes.

5. UV metal ink UV metal ink is suitable for printing various metals, such as copper, aluminum, stainless steel and other substrates, free of volatile organic solvents. According to the different surface gloss, can be divided into two kinds of high-gloss and matt, suitable for printing high-end labels and meters.

6. UV screen printing glass, ceramics, plastic ink glass, ceramics, plastics are non-absorbent printing materials, so the ink used is also basically the same, this type of ink has no volatile components, no odor, no irritation, cured film has a good Water resistance, scrub resistance, colorful, wear resistance. Suitable for all kinds of glass products, ceramic products, various plastic substrates and certain metal substrates.

When printing, light-curing inks generally do not need to be diluted. If the viscosity is too high, an appropriate amount of photoactive diluent may be added. A reflective plate is provided under the glass to greatly accelerate the curing speed.

7. UV transparent ink UV screen printing transparent ink is transparent, suitable for printing a variety of transparent substrates, its transparency is not affected. Such as printing transparent PET, PVC, ABS and flame treated PP, PE, etc., to produce high-grade plastic signs, billboards, packaging boxes, etc., strong water resistance, solvent scrubbing.

8. UV Disc Ink UV screen printing ink is specially designed for printing hard discs such as CD discs, DVD discs, and PCs. It has high speed of light and solidity, good adhesion, low shrinkage, smooth ink layer, high hardness, and good abrasion resistance. High resolution, colorful, good adhesion between layers, stable printing performance. Generally divided into light, matt, sand surface 3 kinds.

9. UV glass / metal matte ink UV glass / metal matte ink is a screen printing light curing matte ink, the appearance of thixotropy paste. The requirements for the screen are very wide, 150 to 420 mesh screens can be printed, and the grain size is controlled by the mesh. Curing speed, not yellowing. Printable glass, plexiglass, various metals and titanium plates, etc., producing frosted glass or frosted metal signs. The cured film has good water resistance, high hardness and good abrasion resistance. If a special colorant is added, high-grade colored frosted glass or metal plate can be made.

10. UV Refractive ink UV Refractive ink is mainly used for refractive printing, producing high-grade packaging boxes, decorative paintings and so on. Printed substrates require smoothness, cleanliness, and high light reflectance, such as mirrored gold and silver cardboard, aluminized films, and mirror stainless steel. The number of screen meshes above 400 mesh ensures the fineness of the printed pattern.

11. UV three-dimensional raster ink UV stereo grating ink was colorless and transparent, good rheological properties make the printed grating stripe columnar or close to columnar, print stereoscopic effect is realistic. The ink has good adhesion to commonly used substrates such as PVC, PC, PET, and glass. The excellent toughness ensures that the grating stripe is not affected during stamping or bending. The number of screen meshes, the thickness of the photosensitive film and the grating stripe spacing should be determined according to the parameters of the three-dimensional printing image.

12. UV wrinkle ink UV wrinkle ink After irradiation with a specific wavelength of ultraviolet light, the surface of the coating shrinks to form wrinkles. Can print PET gold and silver cardboard, plastic film, metal, glass and other substrates, production of high-end packaging boxes, signs, technology products. The wrinkle size is related to the thickness of the coating. The thicker the coating, the greater the wrinkles. When printing, the size of the pattern can be controlled through the height of the mesh.

13. UV scent ink UV scent ink is a combination of microcapsule technology and UV low-temperature rapid curing process, so that the ink immediately after printing ink drying. The difference from the general flavor ink is that the flavor is encapsulated in a sustained-release capsule, the flavor is not volatile during storage and processing, the flavor of the print is long-lasting (more than one year), and there are various flavors such as orange, lemon, rose, wine Incense, international flavor and so on. Scented ink can be screen printing production of various high-end packaging boxes, gift boxes, fragrance greeting cards, printing children's magazine covers, books, metal signs and so on.

14. UV screen printing four-color dot ink UV four-color dot ink suitable for screening printing paper and plastic substrate, such as PVC, ABS, flame treated PP / PE, gold and silver cardboard. Light-fixed dot inks have excellent transparency, pure color and bright colors, no yellowing after light irradiation, and good dot reproducibility. In addition, there are UV screen printing glass dot ink, suitable for printing a variety of glass painting and metal products, can also print ceramic products.

15. UV Scratch Ink UV Squeegee Ink is free from any volatile organic solvents and odorless when compared to ordinary Scratch Ink inks. It does not block nets during printing, uses UV curing, does not erode on printed substrates, has high production efficiency, and has a high hiding rate. The cured film is tough, has good abrasion resistance, is not easily damaged during packaging and transportation, and can be easily scraped off with nails or coins without residue. It is suitable for printing variety of coupons based on coated paper, glossy paper, PVC, aluminum foil, etc., IP cards, IC cards, lottery tickets and various products that need to be temporarily covered.

16. UV elastic ink UV screen printing elastic ink is used to print a variety of soft and flexible substrates, such as artificial leather, leather, nylon cloth, PVC and other plastic films. During the stretching or washing process, the cured film and the substrate simultaneously expand and contract, and the cured film has excellent tensile resistance and friction resistance. The cured film has good toughness and adhesion fastness, high gloss, and good wear resistance. UV stroke elastic varnish, colorless and transparent paste, with obvious thixotropy, cured film after UV irradiation is flexible, able to withstand stretching, bending and other tension effects. It is used to manually oil the surface of the screen printing oil, and it can also be screen printed to increase the three-dimensional appearance of the screen. Suitable for brushing a variety of soft and flexible substrates such as canvas, leather, PVC and more.

17. UV reflective ink UV reflective ink containing reflective glass beads, mainly used for printing a variety of reflective signs, a variety of metal substrates and PVC, PET, ABS and other plastic films have a good attachment fastness, good wear resistance Reflective effect is significant. Different inks are used for the rigid substrate and the flexible substrate.

18. UV Printed Circuit Board Ink UV printed circuit board inks include three kinds of light-flexible solder resist inks, light-solid solder mask inks, and photo-cured resist inks.

1) Photo-Solid Solder Resist Ink. Dedicated to the manufacture of flexible printed circuit board solder resist pattern or thin film circuit protection coating, light fast, cured film excellent toughness, light, adhesion and heat resistance. Stirring can improve the rheological properties of the ink. Generally, it is not necessary to add thinner. If the viscosity is large, a small amount of special photo-solid diluent can be added.
2) Photo-Solid Solder Resist Inks. It is suitable for manufacturing solder mask patterns of rigid printed circuit boards, with fast photo-solidity, good heat resistance, and strong adhesion, and can meet the requirements of single and double-sided circuit boards. If the viscosity is very high during use, a small amount of special diluent can be added to thin it, but the amount should not exceed 5% of the ink dosage.
3) Light and solid resist ink. UV resist ink is solventless resist ink, fast curing speed, no odor, no net seal during printing, high printing accuracy, acid resistance and alkaline etching solution with pH ≤10, also used for making steel. Or flexible single-sided printed circuit board circuit pattern, can also be used to print high-precision metal etching signs.