There are several printing methods for fabric printing:

Screen printing is a kind of printing with a wide range of applications. According to the different printing materials, it can be divided into: fabric printing, plastic printing, metal printing, ceramic printing, glass printing, electronic product printing, lottery silk screen printing, advertising decoration silk screen printing, Metal advertising board screen printing, stainless steel products screen printing, light reflector screen printing, silk screen transfer aluminum, screen printing and lacquer screen printing and so on.

Textile printing

Fabric printing refers to the process of forming a pattern on a fabric by printing. Printing methods include: type printing, screen printing, drum type circular screen printing, transfer printing, and multi-color printing and other methods, wherein the screen printing comes from the type printing (including type paper and zinc plate), By manual operation, gradually semi-automated, fully automated, and later peaceful network development to the rotary screen type.

There are several printing methods for fabric printing:

1. Direct Printing of Paints Direct printing is the process of printing directly onto a fabric by printing a prepared paste. This is the simplest and most commonly used process in the printing process. Paint direct printing process generally refers to white or light-colored fabric printing, it is easy to spell color, the process is simple, after printing can be processed by bake, apply a variety of fiber textiles. The paint direct printing process can be classified into Accraming F-type adhesives based on the currently used adhesives. Acrylic adhesives, styrene-butadiene-styrene emulsions, and chitin-bonded adhesives are three direct-printing process labels.

2. The main methods of silk printing silk printing are direct printing, discharge printing, and anti-inking printing. The direct printing method has already been introduced. The method of discharge printing, transfer printing, and osmotic printing will be introduced separately in the following subsections. Here, the anti-inking printing method is mainly introduced.

3. Knitted Underwear Printed Knitted Underwear Printing The main application of direct coating printing process, fabric printing after the double drying or natural drying, to avoid the knitted fabric wet processing easy deformation and wet processing problems difficult. The printing method is mainly based on flat screen printing, and is divided into manual scraping and machine operation. This printing method can adapt to pattern patterns of various composition forms and organizational structures, and is suitable for production needs of small batches and multiple colors.

4. Discharge printing Dispensing printing, also known as stencil printing, refers to the use of discharge agents printed on colored fabrics to destroy some pigments that have been dyed, and thus obtain a variety of patterns and patterns of printing. Dispensing agents are chemicals that decolorize the dyed bottom. Such as: hanging white, stannous chloride and so on. This method can be divided into white (pull white) and pattern is colored (pull) two. The latter dyeing method makes the fabric pattern fine, but the process is complicated and the cost is high.

5. The silk screen burn-in and burn-out system utilizes two kinds of fiber blended fabrics with different acid resistance. After the acid burn-in paste printing and chemical processing, the acid-resistant natural fibers are partially rotted to expose the acid-resistant chemical fiber part, forming a crystal clear The transparent pattern, its special style makes the burnt-out products have a high-grade and beautiful feeling. Burnt-out products are not only beautiful in appearance, but also have excellent internal quality. They are wear-resistant, high-strength, good-cleaning, quick-drying, and non-ironing. They are welcomed by domestic and foreign markets. The research and application of burnt-out technology has prevailed in the textile printing and dyeing industry in recent years.

6. Wool Fabric Printing At present, printed wool fabrics are mainly made of thin plain fabrics or voile fabrics. Most of them are used to make women's shirts, dresses, quilts and skirts. In addition to direct printing, wool fabric printing also includes printing, anti-printing and transfer printing. Wool blend fabric printing also occupies a certain percentage. At present, the embossing of wool fabrics is also popular and is mainly used for woolen sweaters.

7. The velveteen printed diamond printing uses the characteristics of the silk screen printing on the velveteen to obtain a special flash effect, which can emit the natural light in the sunlight.

8. Foam printing fabrics There are many kinds of special printing, foam printing is one of them. Foam printing is characterized by: strong three-dimensional impression, similar to artificial embroidery, soft to the touch, wear-resistant, washable, fastness, good elasticity, and can be widely used in tablecloths, curtains, tea towels, handkerchiefs, pillow covers, clothing, travel Souvenirs and other aspects. It can not only be applied to natural fiber fabrics such as cotton, hemp and silk, but also can be applied to artificial fiber fabrics.

9. Flocking printing electrostatic flocking is a new technology that is currently emerging in the textile industry. It is a product that uses high voltage electrostatic fields to plant short fibers on top of a grey cloth. Flocking products have a simple process, strong three-dimensional effect and low cost, so they are widely used in rubber, plastics, artificial leather, and decorative products, especially for small-batch tourism products. The use of flocking patterns on shoes and hats, children's wear, logos, and apparel will make it look unique.

10. Transfer printing Transfer printing is a printing process that relies on the sublimation of dyes and the effect of dye vapors on the diffusion and affinity of fibers to complete the coloring effect. Transfer printing is a kind of printing and dyeing production method that is more practical in water-free processing. In addition to not using water, one of the main features is the small paper deformation, so you can print fine multi-level patterns and photographic images. Really transfer the picture of the pattern to the cloth. The effect is sometimes better than general anti-discharge printing.

In addition to the above ten kinds of common printing methods, there are some special printing methods, such as: transfer of aluminum foil printing, photoluminescent printing, fluorescent printing, gold, silver powder printing, paint foam printing, color printing, fragrance printing, diamond printing and Pearl printing, etc., printing methods.

Plastic screen printing

Screen printing of plastic parts is one of the secondary mechanics (or reprocessing) of plastic products. The so-called secondary processing is after the plastic injection molding, and then a surface decorative treatment, such as: plastic plating, plastic spraying, plastic hot stamping, plastic screen printing and so on. The secondary processing of plastic products, therefore, is mainly determined by the properties of the plastic itself, such as its relatively uniform dyeability, and the poor lightfastness of the colors. In order to make up for these disadvantages and improve the appearance of plastic products, secondary processing is required.

A wide variety of plastic products, but for the silk screen method, the sheet and flat body with a flat screen printing method; can be developed into a flat curved surface curved screen printing method; special-shaped products are used indirect silk screen method. The differences in the surface properties of plastic products, including the solid resins, additives, and molding methods, are especially the smoothness, polarity, and static electricity of the surface, which is the root cause of the failure of plastic screen printing.

1. PVC screen printing Polyvinyl chloride (PVC) was put into industrial production in 1931. PVC plastic has bright color, not easy to break, acid, alkali, low cost and so on. However, due to the fact that some auxiliary materials that are added during the manufacture of PVC plastics are often toxic, it is inappropriate for PVC products to hold foods. Polyvinyl chloride film variety of colors, commercially available colorful plastic cloth, artificial leather, etc. are mostly PVC products.

2. ABS plastic screen printing ABS resin plastic, is an engineering plastic. In recent years, it has been widely used in televisions, calculators and other products and in many areas of the national economy. ABS plastics are terpolymers of acrylonitrile, butadiene, and styrene. Because ABS plastics are terpolymers, they share the common characteristics of three components. Acrylonitrile can make the copolymer chemically resistant and have a certain surface hardness; butadiene can make polymers have rubbery toughness; styrene can be The polymer has easy processing and shaping properties. ABS plastics have a variety of colors, products have a glossy appearance, low water absorption, good impact strength and surface hardness within a certain temperature range, and good dimensional stability. Most ABS resins still have considerable impact strength at -40°C and exhibit toughness. The service temperature of the products ranges from -40°C to 60°C. ABS plastics have high molecular weight, good physical properties, easy processing, and printing. Suitability is good.

3. Polyethylene and Polypropylene Plastics Screen Printing Polyethylene (PE) Plastics: Polyethylene plastics are widely used and can be manufactured into various finished products by extrusion, injection, and other molding processes. The polyethylene molecule is a long chain of methylene groups containing a certain amount of pendant groups. The more and more side groups in the polymer chain, the lower the crystallinity of the polymer. That is, the higher the density of polyethylene, the more unfavorable the surface finish. Polyethylene is not clear in many solvents, but when the temperature exceeds 70°C, the polyethylene can be dissolved in a small amount in solvents such as toluene and amyl acetate. The nature of polyethylene provides conditions for surface finishing. The plastic can be soaked with a heating solvent to swell the surface and destroy part of the crystallization to increase the adhesion of the ink film on the plastic surface. The mixture of fuming sulfuric acid, concentrated nitric acid, chromic acid and sulfuric acid can slowly act on polyethylene at room temperature; sulfuric acid and nitric acid can quickly destroy polyethylene at 90-100°C; use heavy lead potassium, sulfuric acid and distilled water The mixed liquid, soaked in polyethylene plastic at 70~75°C, is beneficial to enhance the adhesion of the ink film on the plastic surface.

Polypropylene (PP) Plastics: Polypropylene has been one of the important varieties of plastics for many years. Suitable for all molding methods. Can do all kinds of pipe, all kinds of box and film, fiber and so on. Industrial polypropylene has a high degree of spatial regularity, a high degree of crystallinity, and an isotropic index in the range of 89 to 95%. It also contains a small amount of amorphous atactic and low crystalline macromolecular block macromolecular chains. The melting point is in the range of 170 to 175°C, the glass transition temperature isotactic polymer is -13~0°C, and the syndiotactic polymer is O°C. Concentrated nitric acid and fuming sulfuric acid are capable of attacking polypropylene. At higher temperatures, they can be dissolved in aromatics and chlorinated hydrocarbons. At room temperature, they can only swell. Acids and esters also have some dissolution effects on them, and as the content of isotactic polymers increases, the solvent resistance increases accordingly.

In general, polyethylene and polypropylene are high-molecular materials with high crystallinity and low surface tension and non-polar molecular structures. There is no polar group such as carbon group, carboxyl group or hydroxyl group in their molecular structure, and the surface finish of polypropylene is easier to be compared with polyethylene.

4. Screen printing of plastic parts for electronic products Electronic products, especially radio products such as radios, tape recorders, televisions, etc., have very high requirements for appearance. The designers of the art design attach great importance to the appearance and decoration of the products. However, the current technology used for exterior decoration in our country is limited, which limits the thinking of the artists and enables them to pass only the size of the products and the use of various lines. The plastic itself is limited. The color to change the appearance of the product. Since the development of plastic screen printing has brought convenience to the decoration of electronic products, plastic screen printing of various electronic products in China has been widely used in recent years.

5. Screen Printing of Plastic Signage In recent years, plastic signage and plastic molding components for silkscreen graphic characters have developed rapidly. For example, the screen printing on polyvinyl chloride rigid board (PVC board), polycarbonate, ABS, plexiglass, modified polystyrene plastic parts, has been widely used, and achieved a good decorative effect and economy benefit.

6. Screen printing of soft and hard plastic parts Screen printing of 1 plastic hose. There are several methods of printing plastic hoses, the main method of which is thermal transfer printing. The thermal transfer method uses sublimation dye ink or other materials to print the image on the transfer paper first, and then paste it together with the substrate and heat it from the back of the transfer paper to sublimate the paper surface dye. Graphic transfer to the substrate. After the plastic hose is surface-treated, it is passed between the sun gas and the transfer paper from the hose and a heated iron plate. The heated iron plate pushes the transfer paper to the hose and heats up the transfer. After transfer, the hose enters the drying device and the drying temperature is generally about 65°C. 2 soft plastic screen printing. Soft plastics are used to make toys, such as inflatable cartoon toys. When the production is usually first on the soft sheet plastic screen printing pattern, then cut, hot synthesis type. The thickness of the material used is generally 0.8~3.0mm. If screen printing with more than two colors is performed, most of the plastics will expand and contract, resulting in color misregistration between the second color and the first color. This trapping error causes the product to lose its original value and cannot be placed on the shelf as a good product. For this reason, multi-color printing can only be achieved with long presses that can hold flexible plastics. For long printing, the substrate should be fixed with an adhesive. It is worth noting that toy printing must use non-toxic and harmless inks in accordance with relevant standards. 3 Screen printing of hard plastic products. Hard plastic products are two kinds of hard plates and molded products. Tickets, signs, instrument dials, cosmetic containers, etc. are all made of hard plastic.

7. The screen printing surface of the instrument panel The surface material of the panel may be metal, various plastics, and paint. The appropriate ink is used to print some text and graphics on the panel, indicating some functions of the instrument and equipment, and also beautifying the panel. Screen printing text and graphics require clear, good adhesion, wear resistance, but also requires soft and elegant colors, giving people a sense of beauty. Here we mainly discuss how to use screen printing process to improve the quality of the panel.

8. The screen printing polyester label with color polyester labels is a new type of label that has rapidly developed in China in recent years. Because it has the advantages of colorful, decorative, easy to paste, simple manufacturing methods, low cost, etc., it is welcomed by the majority of users, and quickly obtained in high, medium and low-grade electronic products, household appliances, and stationery. Popular applications. At present, there are many specialized factories in the country that produce such signs. However, because the production processes of these factories are all designed in accordance with the needs of high-volume label processing, it is impossible for those polyester brand products with many varieties and small quantities to be viewed either in terms of processing technology or production cost. adapt. Here is a process technology that uses screen printing to print colored polyester labels for reference in the production of small-lot, multi-colored colored polyester signage producers.

Metal screen printing

The wide range of metal screen printing can be used to print various kinds of logo roots, panels, signs and metal moldings. Most of them are decorated with direct printing. There is no significant difference in screen printing techniques. However, metal products are durable goods. The surface decoration requirements are higher and more durable. Therefore, the surface treatment, such as surface coating, electroplating, and anode Oxidation or mechanical hair (bristle pattern, drawing) and so on. When printing, make sure the surface is clean, so be sure to wear gloves during work. If the treated surface contains grease, fingerprints, dust, etc., it must be washed with solvents such as trichloroethylene, thinner, and gasoline. In addition, according to the surface properties of the metal, select suitable printing inks, such as amino baking paint and epoxy baking paint, and use amino and epoxy-based thermosetting inks; nitrocellulose varnish and other natural drying coatings. Solvent-evaporable or oxidative-drying inks may be used, but solvents or thinners must be used with caution to prevent damage to the paint, and a layer of varnish is added after printing to improve gloss and protect the entire surface; the metal plating surface is also Can use thermosetting ink printing, but pay attention to the difference between the thermal expansion coefficient of the plating layer and the metal, in order to control the heating temperature, to avoid the difference in expansion coefficient caused by the cracking of the coating; anodized aluminum plate will form a layer of uniform oxide layer (thick about 2 ~ 10μm), with a larger surface area, can improve the adhesion of the coating (ink), in addition, there is the performance of the adsorption of dyes, can use the proliferation of ink or dip dyeing method of making labels.

1. Corrosion placards are a traditional signage. They are used as grit-blasting oxidizing paint markings for instrumentation panels. They are used as corrosion and baking labels for vehicle and ship licences, equipment numbers and nameplates of various machine tools. They are used in harsh industrial environments. The copper plated front plate for electromechanical products is used as a porcelain oxide lacquer plate for surface decoration of instruments and electronic instruments, as well as high-cursor plates. The graphics on these labels were all visualized by photochemical methods using liquid photosensitive adhesives (protein gel, bone glue, gelatin, polyvinyl alcohol glue, etc.). Although this method has the advantage of small graphics and text distortion, there are many defects in the production process, such as low production efficiency, high labor intensity, and high energy consumption. The use of screen printing methods to visualize texts can increase production efficiency by several times and save a lot of auxiliary materials and energy. Below, the reader is specifically introduced to the graphic and silkscreen printing process of corrosion signs.

2. Screen printing aluminum oxidation dye sign aluminum oxidation sign, the surface is hard and smooth, wear-resistant and durable. After the aluminum oxidation plate and the panel are closed by oxidation, there is an oxide film on the surface to make the surface hard and smooth. Screen printing with ordinary inks often has poor adhesion, which should be particularly noticeable. To solve this problem, it is necessary to first solve the problem of silk screen printing ink and operation. The use of alumina screen printing inks is the key to solve the problem of adhesion and firmness of the ink film in alumina screen printing. This kind of ink is different from general inks. It adheres firmly to aluminum plates and also has good lightfastness. It is the ideal ink for screen printed aluminum anodizing signs.

3. Screen printing convex color aluminum logo plate features concave and convex signs painted in the recess, it has good abrasion resistance, but also has a three-dimensional effect, used for mechanical nameplates and company plaques. The traditional method is to manually paint in the corroded cavity (or use a syringe needle to inject paint), and then trim it by hand to remove the edge paint. This method is not only time-consuming, inefficient, and requires operators to have skilled skills. Moreover, the signs produced are often unclear on the surface of the cards, the writing is distorted, and the quality is very unstable. Therefore, it is limited to the production of a number of small, small number of colors, quality requirements are not high, the pattern is very simple sign.

4. Screen printing sandblasting oxidation embedding paint aluminum sign silk screen sandblasting oxidation inlay paint sign process, is a traditional sign making process. The appearance of these products is silver-white, with high surface hardness and good wear resistance.

5. Screen printing wood from alumina plate water white alumina plate is a new type of sub-photon surface plate that has recently appeared in China. This sign has a milky white appearance, smooth and smooth surface, no concavity and convexity, with resistance to hot and humid, salt spray, mold resistance, but also has a strong light, abrasion resistance, resistance to organic solvents and other characteristics, suitable for frequent cleaning Machines and machines that work in harsh environments. What is even more commendable is the fact that silk screened alumina white plate has fewer production processes, high work efficiency, and basically no “three wastes”. Its consumption of manpower and energy (including water and electricity) does not exceed one-third of the traditional corrosion signs.

6. Aluminium oxidation color sign aluminum plane anodized signage is one of the varieties of signage, and it is widely used. It has beautiful, bright, high hardness, good wear resistance and other characteristics. In the past, aluminum sheet blanking, mechanical polishing, chemical polishing, and oxidation were performed; indirect screen printing, thick coating of zinc and bismuth, and alkyd varnish were used for protection printing; coloring was performed using a dyeing paste. Regardless of the screen printing or dyeing process, this process has the disadvantages of multiple materials, complicated processes, low resistance to printing, poor resolution, and high cost. Under the current conditions, it is possible to compile a set of new processes with simple processes, good quality, and high efficiency. The new process uses direct printing of non-toxic diazo-type photoresists to screen printing plates. The practice has proved that it can achieve the requirements of fast plate making, high resolution, high printing resistance, and low material consumption. In addition, the process of printing protective lacquer, dyeing, and unfinishing printing materials can be combined into one, namely self-made water-based dyeing printing materials, which can be directly dyed and color-coded one after another without the need for color cylinders. This greatly simplifies the entire process and operating procedures and enables new methods for planar oxidation dyeing signs.

7. High-gloss three-dimensional relief aluminum plate With the continuous development of production technology, people's physical and spiritual living standards, people not only have higher and higher requirements for the function of the product, but also put forward higher requirements for the product's modeling and performance. . In particular, with the development of the domestic and foreign market economy and the continuous expansion of foreign trade, people's demands for product functions and quality are increasing. In order to improve the market competitiveness of products, high-end three-dimensional relief signs have been widely used.

8. Screen printing plate cards are a product produced by many signage factories. The plaque is mainly made of metal materials. It requires solemn, obvious, and decorative qualities. Among traditional metal plaques, square plaques, especially brass, corrosion, and black lacquer, are the most common. With the constant change of people's aesthetic point of view, the gradual development of the commodity economy also has new and different requirements for the quality of the plaque. As the sign industry introduced screen printing technology, it not only promoted the development of screen printing technology, but also provided technical means for the sign industry to develop new products. Silk screen printing new type electroplating plaques is the product of the combination of sign plating and screen printing. Its basic method is to make clear patterns on the copper plate by silk screen printing, to protect and cover the non-graphic areas with the ink layer, and to conduct electroplating of the copper, nickel, and chromium systems on the silver-silvered part of the pattern, and then perform mechanical shaping and protection processing.

9. Imitation Metal Etch Screenprint Imitation metal etched printed products have a visual metal etching effect. In order to achieve the above effect, the surface of the substrate should have a mirror gloss. The substrates were printed on the substrate with clear ink to form an ink coating with irregularities to form a frosted glass-like rough surface, and a combination of rough surfaces with sharp contrast resulted in a concave printed surface and a convex printing effect on the mirror surface. The stronger the contrast, the better the imitation etching effect. The effect of the unevenness is proportional to the thickness of the ink coating. The ink contains a high solid content, so if you use a low-mesh printing plate, the effect will be better. In this technique, a gel ink of propylene emulsion (solids content 50%) was initially used, and after it was dried, a heat treatment at 180°C was performed. Therefore, substrates are limited to heat-resistant metals and glass, and hard plastics and papers cannot be used. Because of the use of high-viscosity gel inks such as acrylic emulsions and the temperature during operation, the stability of the ink viscosity is extremely poor, and the quality of the product fluctuates greatly. Since UV drying inks have been used in screen printing, there has been great flexibility in printing processes and techniques. The UV ink is 100% curing type, and the ink can be hardened by ultraviolet irradiation for 3 to 5 seconds, during which the surface temperature is about 100°C. If a water-cooled UV irradiator is used, the temperature can be reduced to about 60°C, so the type of substrates can also be increased. The aluminum foil with mirror gloss, vapor deposition paper, vaporized vinyl chloride film, and evaporated polyester film can be used. Print on other materials.

10. Silk screen conical dial silk screen conical dial method: First, the graphics will be printed on the transfer rubber, and then the conical parts will be mounted on a special self-made fixture, and then rolled from the transfer rubber, so that the graphic Transfer to a conical part.

11. Imitation Porcelain Oxidation Signs Imitation Porcelain Anodized Signs are glazed on the surface and have a soft luster. They have good resistance properties, high hardness and wear resistance, good thermal insulation and electrical insulation, good hiding power, and The ideal adsorption capacity is the decoration of instrumentation, especially high-end machines. However, during the production process, chromium-containing gases escape, so the operating equipment should be equipped with good ventilation and ventilation equipment to avoid poisoning. The surface pretreatment method of the imitation porcelain oxidation sign is basically the same as that of the screen printing sandblast oxidation embedding paint sign, except that the imitation porcelain oxidation corrosion sign generally does not need chemical polishing but direct oxidation. Imitation porcelain oxidation corrosion signs, imitation porcelain oxidation dye signs, and imitation porcelain oxide print signs are generally punched prior to oxidation. The process of oxidizing the imitation porcelain oxidation oxidation sign is the same as that of the sandblasted oxidation embedding paint. The imitation ceramic oxidation dyeing sign process is the same as the screen printed aluminum oxidation color sign.

Ceramic screen printing

Decorative patterns on ceramics have long been used in blown, hand-painted, rubber-stamped, and copper plated and offset decals. In recent years, with the application of screen printing in the ceramic industry, decorative patterns on ceramics are more three-dimensional. After firing, the enamel is thick and very bright, and looks as if it was painted with a enamel paint. The pattern is much finer than the one using the blown spray method, and the production efficiency is also improved a lot. Since the screen printing has many advantages as described above for the decoration of ceramics, its application range is wider day by day.

Screen printing of glass

Glass screen printing is the use of screen printing plates, the use of glass glaze, decorative printing on glass products. Glass glaze is also called glass ink and glass printing material. It is a paste-like printing material that is mixed and stirred by coloring material and linking material. The coloring material consists of inorganic pigments and low-melting fluxes (lead glass powder); the linking material is commonly referred to as linoleum oil in the glass screen printing industry. After printing, the glass products are placed in a stove and fired at a temperature of 520 to 600° C. The glaze printed on the glass surface can be consolidated on the glass to form a colorful decorative pattern. If you use silk screen printing with other processing methods, you will get better results. For example, by polishing, engraving, etching, etc., the glass surface is processed before or after printing, and the printing effect can be doubled.

1. Glass etching screen printing

For a long time, the etched decoration of glass products is to heat-coat the wax layer and other reinforcement materials on the glass surface as a resist layer. Then the patterns on the coating are etched with needles, knives, etc. to expose the glass surface, and then This part is etched with hydrogen fluoride. This process has continued to be used by manufacturers, but its processing methods are time-consuming, laborious, and inefficient. The silk screen etching process makes the etching and decoration of glass products simple, time-saving, and labor-saving. Glass etching screen printing, hot and cold printing two methods. Thermoplastic etching screen printing is the preparation of paraffin wax, asphalt, stearic acid and other adhesives, adding a small amount of anti-corrosion powder modulation anti-corrosion printing materials, through the hot-printed silk screen, according to the design of the pattern, the printing material scraped To the glass surface, the formation of a resist film. The part of the resist film exposed to glass is the pattern that needs to be etched. Etching is performed with fluorfluoric acid. After etching, the resist printed on the glass is rinsed with boiling water. Glass stencil etching can also be performed using cold stamping methods. Anti-corrosion printing material can use special asphalt paint and anti-corrosion powder, and can also buy commercially available ink-resistant ink. After the printing is completed, the hydrofluoric acid corrosion can be performed until the resist film is completely dried. Hot stamping is suitable for the etching of continuous, tetragonal pattern patterns on two sides, and cold stamping is applied to the etching of individual patterns.

2. Glass ice silk screen printing

Ice flower commonly known as orange peel, it is actually a very small low-melting glass particles. The fine glass particles have high lead content, and are colored and colorless. The color hue can be red, yellow, blue, green, white, etc., and can also be used to prepare intermediate shades. Screen printing ice decoration, elegant and elegant, mostly used for architectural glass decoration and art glass decoration, such as advanced glassware, lamps and other decoration. Silk screen glass ice decoration, first in the glass surface silk screen color or colorless glass flux layer (flux), and then sprinkle ice glass particles on the glass flux layer. By sintering at 500 to 590° C., the flux layer and the ice flower particle layer on the glass surface are eutecticized to produce an embossed effect. For example, if the silk screen is printed with a colored flux, and the micro-ice is transparent, the flux layer of the glass ice pattern is discolored by the high-temperature eutectic, and a transparent, embossed relief pattern is formed on the glass surface.

3. Frosted screen printing of glass

Frosted glass is on the product glass and adheres to a certain size of glass glaze powder. After baking at a high temperature of 580~600°C, the glass glaze coating is melted on the glass surface and shows a different color from the glass body. A decorative method. Adhesion glass glaze powder can be brushed with a brush, roller roller can also be coated. Through the screen printing process, you can get a frosted surface of the floor pattern. The method is: on the surface of a glass product, a pattern of a pattern formed by a flux is screen printed. After the pattern pattern to be printed is dried, the frosted surface is processed again. Then, after baking at high temperature, the frosted surface without pattern pattern will be melted on the glass surface, and the surface of the screen printing pattern will not be melted on the glass surface due to the effect of the fluxing agent. After baking, the transparent floor pattern is revealed through the translucent sand surface, forming a special decorative effect. Frosted screen printing flux agent, composed of ferric oxide, talcum powder, clay, etc., was ground with a ball mill and had a fineness of 350 mesh. The adhesive was blended before screen printing.

4. Screen printing ion exchange coloring of glass

The tinted glass can be obtained by exchanging sodium ions in the silver and the glass, and then reducing it to a metallic colloid. In the transparent glass plate, only the portion to be colored was printed with the screen ink containing silver ions. After the firing, only the printed portion turned from yellow to brown. Different firing conditions will change the color tone and density. Since there is no reflection difference between the non-colored portion and the colored portion, there is no unnatural feeling at all, just as the glass is melt-colored. The coloration of the characters and marks on the glass and the heat-resistance of the rear window glass of the car, as well as the brown color represented by the simple scale of the experiment, were obtained in this way. The screen printing ink (printing material) of this decoration process is mostly composed of silver carbonate, copper sulfate (burned powder), iron dioxide, talcum powder, etc., and a small amount of zinc powder is used as a catalyst.

5. Silk screen contact control panel

In designing the microwave oven temperature program, a switch combined with a microcomputer was used. This kind of switch is different from the usual mechanical switch. It is a switch printed on a glass plate. It has no moving parts and no bumps. It is very smooth, easy to remove, and can be opened and closed by touching with the hand. The surface of the control panel is covered with a conductive film, and the periphery thereof is screen-printed with a ceramic ink for decoration and character display. Its advantages are resistance to mechanical wear, chemical resistance, and easy decontamination. In addition, in order to color the glass during the design, the organic paint can be printed on the back surface. Since the back surface cannot be directly contacted, the durability is strong, and the selection of the ink is also large.

6. Glass surface matting screen printing

The glass surface matting ink (made in Belgium) was printed on a soda-lime glass plate with a screen printing plate and washed for several minutes. The effect was similar to that of brown glass. Fluoric acid is usually used to etch glass. This is dangerous. The ink does not contain strong acids and the operation is relatively simple. The extinction effect and etching are similar.

7. Screen printing of electrothermal demisting device

In order to prevent the condensation of water vapor in the rear window glass of automobiles, more and more electrothermal demister devices have been printed. The screen printing method is to apply silver paste to a line on a smooth glass and fire the glass while bending the glass. When the rear window is fogged and fogged, let the lines heat up through the current, increase the temperature of the glass surface, and remove the moisture. When this electrothermal defogging device is energized, some automobiles are not automatically switched on by manual switching, but are automatically powered off. The sensor of this automatic device is a screen-printed electrode on a thin plate glass with a saw-toothed electrode, and a layer of moisture-sensitive body is covered on the electrode. The power ratio of the humidity is automatically controlled to turn on and off the power.

8. Screen printing of liquid crystal display elements

The liquid crystal digital display element is about 10μn apart. The two thin glass sheets are sealed around and injected into the liquid crystal, sealed and sealed. On these two glass surfaces, the silk screen is printed with “8” shaped transparent conductive strands. This “8” character consists of seven parts, which can be partially increased in voltage to show the number (0~5). The process of making this "8" pattern is first of all on a field glass with an entire electrically conductive strand. The idle ink is only screen printed on the "8"-shaped portion and then etched with acid to remove it. Printed portion of conductive strands. Screen printing in the manufacture of electronic products In the production of electronic products, screen printing has become an essential process. Such as the product shell decoration, printed circuits, thick film integrated circuits, solar cells, electricity; Ju, capacitance, piezoelectric elements, photosensitive elements, thermal elements, liquid crystal display elements, etc., are used in varying degrees in the production process Screen printing process.