Screen printing in various industries
We are a big printing company in Shenzhen China . We offer all book publications, hardcover book printing, papercover book printing, hardcover notebook, sprial book printing, saddle stiching book printing, booklet printing,packaging box, calendars, all kinds of PVC, product brochures, notes, Children's book, stickers, all kinds of special paper color printing products, game cardand so on.
For more information please visit
http://www.joyful-printing.com. ENG only
http://www.joyful-printing.net
http://www.joyful-printing.org
email: info@joyful-printing.net
Screen printing
Many people refer to screen printing as "screen printing", perhaps for the Silk Screen Printing word source, but the word "screen" has been misled as a special means of printing silk and silk, in fact, in the early days of screen printing for textiles. Printing, and the mesh used in the screen is made of natural silk cloth, which is also related to the English SILK word, and then inherits the words of screen printing. According to the theory, screen printing should be called “stencil printing”. Because the ink is printed through the printing plate, the printing area is divided. We can say that the painter sprays the company name and the car number on the body. It can't be called screen printing, but it can be called "hole printing". Because the plate with holes dominates the distribution of paint, the lines of lines and characters are often also used by stencil tools instead of screen tools. work.
Back to the earliest use of the hole plate, it may be the printing lines on the silkworms of the Western Han Dynasty, some are gold, silver, and dyed patterns. At that time, the silk screen mold of the letterpress was also used. Under a stamping rule, the letterpress printing was printed. The mold stained ink was printed on the cloth one by one. In addition, the hollowed-out impression was used to print the printed matter one by one on the cloth in a stencil manner to form the dyeing project of the cloth. This may be the earliest era of screen printing. Screen printing was also used away from the process a hundred years ago, especially in the textile dyeing and printing process, to the small amount of paper printing. Today, digital plate-making technology is used to make the plate-making machine and the printing machine into one. It becomes a low-cost and high-efficiency fast and small-volume printing method, such as Riso ideal industry, Duplo Lippo's “digital fast printing”. The machine adopts a roller type mesh cloth, and a wax paper plate scraper set which is supplied with ink and squeezed ink to the outside is installed in the roller. The stencil of the plate material is a kind of "stencil paper" which is coated with wax and ink-proof on Japanese paper and cotton paper. It is used as a printing machine plate to cover the roller mesh cloth. For decades, the wax paper is Using a hand-made steel stylus and lettering on the Knife-faced steel plate, the stencil-proof surface of the ink-resistant stencil is pierced to produce a stencil-printed plate of ink-ink. Therefore, in schools and government offices over thirty years or earlier, Many copies of printed documents, materials, and brochures are also printed using the "printing plate" printing method of the engraved steel plate. This hole plate is also one of the screen printing methods, and it is only under the prevailing manual or phototype printing of lithography. Gradually fade out of the eastern document printing industry (there seems to be no wax paper printing in the West, even the mining town is also printed with the typeface printing), and Japan's ideal industry has put the digital printer into a very extreme range, not only using the 600x600dpi resolution of the heat The imaging head, on the stencil printing plate, is required to penetrate the plate printing part necessary for forming the stencil. It is very feasible on most black and white printing, but the image and the version are not enough to be monochromatic. Plus a set of colors Unit, for its own plate-making ability and network connection capability, as long as the size of a small photocopier is small, it can be 7,200-10,800 A3 printing capacity per hour, which is enough to take away the fast printing machine market. 90%, only a limited number of high demand markets. The test papers for cram schools, schools, and entrance exams provide a very convenient way of digital stencil printing, and the cost is low. The cost of dozens of printed copies is also very limited. This digital printer provides a very favorable printing space for the stencil (screen), but when it comes to color printing, the ideal industry has to go to the HC5500 series, which is printed by inkjet color. This is the resolution of the fast printing machine. The lack of bottlenecks and overprinting accuracy.
Screen printing has the largest printable size in the printing mode. Luzer's plate-making machine can reach a huge size of 3.5×9 meters. The printed ink can be printed as long as it is a fluid paste. Very rough dye-printed anti-print paste, to very expensive nano pigments, gold and silver, fluorescent, pearlescent ink, may also be more expensive to nano silver paste, gold paste and rare metal crucible printing. Today, I want to say that the screen version can print some bizarre prints, which is not unusual or news. In many printing presses and printing equipment, the printing size of the machine is increased, which often means that the weight of the printing roller increases, and the weight of the roller increases geometrically, that is, the roller twice the diameter has a weight of 4 times and the diameter. At 3 times, the weight of the roller is 9 times increased, and in the screen printing, whether it is platform or roller printing, there is no weight change in this aspect, which is most unexpected, if a tent of six meters x six meters To print a 50 cm number or mark, then only the screen printing is the most convenient, directly put the plate on the canvas position to be printed, use a scraper to scrape the ink on the back of the plate, so that the ink passes through the plate and The pores of the layout anti-printing film reach the printed canvas, and it is not necessary to prepare a large-sized printing machine because of the large size of the printed body. The printing material is thick, thin, hard, soft, curved, and concave and convex. The screen is very adaptable. In many cases, screen printing is used for visual color printing. But more and more screen printing is used for glazing. The glazing printing process of the twilight coating, like a lot of printed matter, firstly uses matte plastic to make the matte surface, and then uses the UV bright paint to print on the processed part that needs bright light to form a bright light and a contrasting picture. The version is one of the means of glazing.
1. Screen printing in paper printing
In medium and small size papers and general cultural, commercial and packaging printing, it can be said that it is impossible to compete in peace and flexo printing, but in the printing of huge size posters, it takes advantage of plate making, like posters for buses. It is also convenient to use the direct projection plate making of the enlarged mesh, or to use the negative film projection to make the plate. Even the huge direct inkjet photosensitive plate making such as 3.5×9 meters, even using the LED light source of UV to make the photosensitive plate on the mesh. The method can be printed on the paper medium, so the large size is more than 2 meters to the huge size. The advantage of screen printing is difficult to replace by other editions, but now it also encounters the challenge of inkjet printing, in 50 copies. With 100 copies printed in small quantities, low inkjet cost and fast aging, and posters of less than 2 meters, the giant leaf lithographic printing press has also replaced this market. In Europe, there is a screen printing and printing factory, which introduces KBAR-205. A small amount to a large number of poster printing, a four-color line UV-cured screen printing posters, gradually replaced.
As for screen printing on medium or small size posters or special inks, such as fluorescent ink, metal ink for glitter, high-yellow pearl ink, perfume ink coated with capsules, warm ink, two-liquid capsule Ink, etc., because the material particles are large, and some of them are under the printing pressure, these capsules will rupture and lose their effectiveness, or block into the gravure and Anilox Roller holes. Only screen printing can allow the printing of coarse particles. Passing under a little pressure, this is also the specialty of screen printing. Some wallpapers can be printed using a roller-type screen, which can be used to print thicker and thicker inks without seams. Printing thicker materials on the surface of the wallpaper can make the wallpaper more three-dimensional, even printing foamed materials. When heated, it produces a great three-dimensional texture. A lot of paper prints need to be printed with scratches, which cover the scratchable silver ink layer. It is also most suitable for roll screen printing attached to the flexo press, once enough to cover the thickness and concentration to prevent the password from being seen through.
2, plastic surface printing
In the past, solvent-based inks were mostly used in screen printing and pad printing. Pad printing is mainly used for small areas or surfaces with large tortuosity, while screen printing is suitable for flat or slightly curved surfaces. Plastic bottles and plastic drums can also be printed by rotating the printing surface and the screen. Now due to environmental factors, UV-cured inks have been used, which can greatly reduce the impact of solvents on environmental protection. At present, some IMD mold-mounted printing, if you want to thicker ink color can be screen printing, and then moved into the mold of the plastic injection machine, once shot with the label together to present this is conducive to recycling. Credit cards used in credit cards, IC cards, RFID cards, etc., can be screen printed, at least some glazing or signature, white base and scratch-resistant lines above, must be screen printing. Acrylic kanban text, color graphics, advertising light box, signboard, standing POP advertising, some are acrylic, plastic, pearl, pen, as long as the surface treatment is good UV screen printing can be produced. The instrument panel of the vehicle and the machine tool can also be printed in a multi-color, multi-layer, or even a luminous screen. In order to increase the ink color, two-sided printing can be used to display the color thickness and the shading rate. Some plastic trademarks also use flexo and screen printing mixed printing to express the advantages of screen printing color.
3. Screen printing of large plates
These materials are made of metal plates for direct printing and printing. They can also be printed with anti-corrosion inks. The metal plates are etched and etched. The UV inks are also widely used in metal plates and marble plates. As for the printing of wood boards, Directly printed on the surface of the wood is easy to absorb and adhere. If it is used to process the enamel film, it is mainly printed with UV and solvent ink. If the tiles are not glazed, the tiles can be directly screen printed or transferred to print. At present, the world's glass printing has increased a lot, mainly to add a lot of functional features such as defogging hot line printing, anti-glare windows and gradation dots on the window glass frame, and these thick black screen printing ink films are mainly to prevent Under the glass, according to the glue, it has been decomposed by outdoor ultraviolet rays for many years, and it has printed black shading, which can guarantee the rubber life of one or twenty years. Further, there are many functions for printing on photovoltaic glass, but the cleaning and adhesion treatment of the glass surface is important.
In the small-sized metal plate nameplate, there are many printed with screen printing. It is also possible to add stamps such as voltage, power consumption wattage, manufacturing date, batch number, etc. before the finished product is installed. It is also a very feasible method to use screen printing on wooden boards, leather or other decorations and texts on handicrafts. Gift industry products such as rackets, clubs and brand names on the clubs are also printed directly using screen printing. As for other decorative screen printing, such as food, chocolate label, available food materials, food coloring, screen printing can be used to reduce the manual hand-painted way.
4. Screen printing of transfer paper and sublimation materials
Since the surface of some materials should not be printed directly by screen or stencil printing, such as the peripheral ring print of a bowl and the concave hemispherical decoration in the bowl, if the transfer paper is used for wet-moving transfer positioning, Kiln burning will be easier. The part of the sports equipment is directly screen printed by the factory in the plane, and the arc type and the cylindrical surface are not suitable for direct printing. It is very easy to use the transfer method. Today, some people use the transfer paper on the body to make a tattoo sticker, and pressurize the adhesive transfer or sublimation transfer. When necessary, the transfer paper is heated to transfer the pigment to the sublimation. On the printing material, the product can maintain a good print and the variable elasticity of the grain, because if the direct printing is fixed, it cannot be changed, and the surface of the uneven surface cannot be uniform. The transfer paper printed on the transfer paper has a release layer which can be immersed in water. After the water is soaked, the ink layer can be separated from the transparent adhesive layer to form a thin transfer film which can be freely moved. Other decorations such as bicycle columns, motorcycle fuel tanks, tool boxes, or other various machines and vehicles can also be decorated by means of transfer. Like ceramic printing, there are many colors of glaze, some are expensive, such as pure gold, and there is also discoloration in ceramics. There are many reasons for this color reproduction, especially the temperature of glaze sintering, which is related to the reproduction of color. It will change greatly, so only the special person who can control the coloring material and the kiln firing temperature can do this color reproduction work.
5. Screen printing of textiles
This is a long-standing and widely used printing method, some of which are direct printing of pigments and dyes, but also printing anti-dyeing pastes or other anti-staining materials. But there are also screen printing inks that are only surface-attached, like T-shirts, or travel bags, and prints on tool bags, which are not dyed into the fibers. Most of the silk dyehouses in Kyoto are drawn by hand, while the plain dyed fabrics are not screen printed. Only the patterned fabrics can be printed. Milan, Italy, many women's fashion fabrics, cloth and tie materials use printing and dyeing, then the use of the screen version of the flat screen or cylinder type screen printing. If the long roll of the cloth is made by a roller screen printing machine, it is very reasonable to make seamless printing, but this type of screen printing plate with a width of 1 meter to 2 meters is not only easy to make, but also light. It is a plate with fine meshes that is very expensive. It is definitely not a price that can be afforded by a small amount of printing. Therefore, only a large number of productions can be used for the production of seven or eight-color roller screen printing machines. For textile printing, it is also possible to make continuous seam printing on the whole piece of cloth. Generally, there is a diagonal work table with a long strip of cloth attached. If each print is printed ten times in a 60 cm frame, printing The inclined workbench must be more than 6 meters, and the frame must be positioned at the bottom and the left or right positioning card, one at a time, printed ten times, then changed plate, color change printing, and finally all printed The color of the version is completed, and then the cloth is precisely moved to the place to be printed, and then the next 6 meters is printed. This can be printed as a small batch of long-length cloth. A large number of T-shirts can be printed in disc-shaped printing units, ranging from six to twelve colors at a time. The bottom T-shirt holder can be rotated accurately and printed at an angle from color to color. At the end, all colors can be printed and then removed. T-shirt. A small amount of thermal transfer is available, and there are now many direct inkjet methods. Textiles can be printed directly using gravure and screen rollers. The width is up to 2.4 meters. The production capacity is very amazing. The price of textile dyes is very high. It must be light, washable and weather resistant after printing. The roller type large-size mesh cloth is made of metal perforation, but the metal screen plate is connected by double-sided taper mesh holes, and has anti-backflow effect on printing, and these fine meshing mesh matching technologies make these The roller mesh is both fragile and expensive, and the cost of printing presses and printing is also rising. Many fabrics, canvases, and apparel related industries have small pieces and large pieces of fabrics, which can also be printed by screen printing, but they become a production process on production lines such as sports equipment, dolls, luggage, etc., and the printing industry only The supply of materials is related, but there is almost no business in the business.
6, electronic industry printing
Since the printing circuit board began to enter more than 40 years ago, it can be said that printing technology has created the industry such as printed circuit board, and today some printing companies that have not entered the electronics industry, such as the use of screen, flexo, inkjet and other technologies, It can also print conductive inks, which will form a new batch of electronic industry printing peers. PCB printed circuit board industry, the earliest anti-corrosion photosensitive film forming technology, copper wire corrosion technology outside the copper wire, are used in printing letterpress, gravure plate making technology, and later using the photosensitive printing anti-corrosion film process, changed to Screen printing to print anti-corrosion inks, forming screen printing all the way to the production of printed circuit boards, today is not just a single layer of thick PCB printed circuit boards, such as mobile phones, digital cameras, must be in the limited space of the body, put down multiple layers A flexible circuit board that can be wound, and the re-expansion of this technology can be produced by non-corrosive type, printed conductive materials by printing techniques, and circuits and other functions such as silver, aluminum, carbon, etc., which are available in the future. Printed electronic communication equipment manufactured into simple semiconductors, memory, resistors, and capacitors has become an inexpensive consumer electronic product. For example, if you rent a mobile phone in another country, you can call the mobile phone. After you use it, you don't have to refund the money. Naturally, you don't need a deposit. You can throw it away! Photovoltaic solar non-crystalline germanium battery, film circuit, thin film battery, printed in IC hybrid circuit. To form tiny circuits and semiconductors, capacitors, and resistors, it is necessary to accurately print the thickness and line width on the IC chip. Like Foxconn, a subsidiary of Hon Hai, the membrane button switch printed on the two-sided film by screen printing, the conductive line, the carbon contact point on both sides of the button, and the empty spacer layer separated by the contact points on both sides, plus the necessary color on the button surface, Markings are all done using the screen printing process. It is only Foxconn that has a production output of several billion yuan a year.
7. Screen printing of communication equipment
In addition to the above circuit board and panel decoration, the color and personalized decoration on the outside of the mobile phone often rely on screen printing and rewriting or IMD in-mold shooting. The most embarrassing RFID card, also known as the communication product, uses the radio frequency to cause the card antenna loop to receive the signal and energy, then open the information on the IC chip, and use the screen printing conductive antenna to emit the signal to complete the data capture identification action. I believe that functional devices like RFID cards will have more and more diverse communication developments.
8. Screen printing of optoelectronic products
Used in small mobile phone screens, some use flexo printing technology, while medium and large size LCD panels produce TFT optical switches and grating grids using fine screen printing, including the production of OLEDs and PLEDs without TFT in the future. Screens are used to produce and distribute barriers and color filters, but more and more filter sets are being replaced by inkjet processes, including conductive traces and isolation gates. CD and DVD prints, some use all screen printing, but also screen printing without horizontal printing.
Back to the screen application in electronics, optoelectronics, communications or other industries
It is used in electronics, optoelectronics, telecommunications, or other industries to distribute materials or obstructions of different functions. It has been changing in the process, if one day uses E Paper electronic paper, E Ink electronic ink, net The distribution of the printing materials is also very natural. Because of the large mesh and low pressure printing principle, the slim capsules will not be crushed and broken. Some foaming materials, magnetic materials, conductive inks, screens still have the convenience of use, mainly the distribution of materials, it is naturally possible to further develop opportunities.
It is undeniable that the printing function of screen printing on color printing and on color filters is gradually being replaced by inkjet technology, especially for large posters and a small amount of printing, but screen printing is popular as Apple i phone. Next, the screen printing machine for printing screens, one hundred and one hundred orders at a time, can be seen that some industries rely heavily on screen printing machines. The printing precision is often between 2u and 5u. Not only the precision of the printing machine is high, the tension and precision of the mesh are also high, and the printing process can meet the requirements of different electronic, circuit and communication. Great use.