Hangzhou FY Textile Digital Printing Co., Ltd
Add: Room 1202A, Building C Bodi Center, Ningwei Town, Xiaoshan District, Hangzhou, Zhejiang, China
Contact us: Solar Bao
There are several ways of textile printing, of which there are two kinds of printing methods that are of great commercial importance: screen printing and roller printing. The third method is heat transfer printing, which is relatively low in importance. The other is rarely used in the production of the textile printing method: wood template printing, wax printing (i.e. wax printing), ikat print and resist printing. Many textile printing factories use screen printing and roller printing to print fabrics. Most heat transfer prints made in the printing plant are also printed in this way.
Screen printing includes the preparation of screen screen. The screen screen used for printing is once made of fine silk, which is called screen printing. Silk screen printing is often used in printing, although the silk screen is no longer used. ) made of nylon, polyester, or metallic silk with fine mesh on a wooden or metal frame. The screen fabric should be coated with an opaque non porous film. There is the pattern, to remove the opaque film, leaving a mesh of mesh, this area is to print the part of the pattern. Most of the commercial screen fabric is first coated with a layer of photosensitive film, and then through the photoreceptor method to remove the patterned film and show the pattern.
Screen printing on the printed fabric. Inside the stamp box, the printing pulp is forced through a scraper (a tool like the wiper on the windshield of a car) to force it to be penetrated from the mesh of the screen. Each color in the printing pattern needs a screen alone, in order to print different colors. 3 color printing requires 3 net frames, and the 3 colors are printed on the fabric. In addition, the pattern of each color must be accurately positioned on the screen, so that the position of the printed pattern is accurate, avoiding the phenomenon of the green stem being printed on the middle of the red petals. Printing to flowers is an industrial term for the accurate printing of all pattern colors on the fabric.
There are three methods to realize screen printing, and the principle of each method is basically the same. The first type of screen printing, which is widely used in 1920s, is still widely used. Until the middle of the 1950s, manual screen printing was the only screen printing method before modern technology gave this process automation. The second method is called automatic screen printing (also known as flat screen printing and automatic flat screen printing). In the middle of the 1960s, there was a further development, and the shape of the screen was developed from manual and automatic leveling to the shape of a circular network. The third methods, called circular screen printing or circular screen printing, are the most widely used screen printing methods at present.
Two, hand screen printing
The handicraft screen printing is commercialized on the long plate (60 yards of table plate). Printing roll of cloth smooth floor in the table, the table surface prior to apply a small amount of viscous material. Then the printing workers are continuously moving the net frame with their hands along the whole plate, and each time a net frame is printed, until all the fabrics are printed. Each frame corresponds to a kind of printing color. The production rate of this method is 50-90 yards per hour.
Commercial screen printing is also widely used to print trimmed clothes. In the printing process of the garment, the garment making process is arranged together with the printing process. Before the clothes are stitched together, the custom-made or unique patterns are printed on the clothes. Because manual screen printing can make large net frames for big flowers, so printing can also print fabrics such as beach towel, new printed apron, curtain and shower curtain.
Manual screen printing is also used for printing Limited, highly fashionable women's clothing and products printed in small quantities for market exploration.
Three. Automatic screen printing
Automatic screen printing (or flat screen printing), in addition to the automation of the process, is the same as the manual screen, so the speed is faster. The printed fabric is conveyed to the screen by a wide rubber belt, but not on the long platform (like a hand screen printing). As with hand screen printing, automatic screen printing is also intermittent rather than continuous. In this process, the fabric is moved to the bottom of the screen, then it stops. The scraper is scraped and printed on the screen. After scraping, the fabric continues to move under the next net frame. The production speed is about 500 yards per hour. The automatic screen screen printing can only be used for the whole fabric, and the tailored pieces are generally not printed in this way.
As a commercial production process, the production of automatic screen printing (flat screen printing) is decreasing due to the use of circular printing with higher production efficiency.
Four, circular screen printing
There are several important aspects of circular screen printing which are different from other screen printing methods. Rotary screen printing and roller printing will be described in the next section, the Department of continuous process, printing fabric by wide rubber band is transported to the continuous movement of the rotary cylinder. In screen printing, the production rate of circular screen printing is the fastest, more than 3500 yards per hour. Use a seamless mesh of porous metal or plastic. The maximum circle is more than 40 inches, so the maximum back size is more than 40 inches. More than 20 colors of the circular screen printing machine has also been produced, the printing method is slowly replacing the roller printing.
Five. Roller printing
Drum printing, like newspaper printing, is a high-speed technology that produces more than 6000 yards of printed fabric per hour. This method is also called mechanical printing. In roller printing, patterns are printed on the fabric by carving copper rollers or rollers. The copper roller can be engraved with very delicate fine lines, so it can be printed very carefully and softly. For example, the fine, dense peg Liz swirl floral printing is a type of pattern printed through a roller printing. We should design artwork and canister carving pattern designers exactly the same, each color each need a carving roller. (in the textile industry specific printing process, five roller printing, six roller printing, etc. is often used to represent five or six color roller printing. Roller printing is the least large batch printing process, and the output continues to decline every year. If the production of each pattern is not very large, this method is not economical. In most cases, the cost of the drum preparation and the adjustment of the equipment is high and the consumption is long, making it less economical to use this method. However, roller printing is often used for printing with very fine line patterns, such as Pezli scroll print and many main printed patterns printed in many seasons.
Depending on the size of the cylinder engraving printing machine and printing pattern. Most printing machine can be configured for maximum circumference 16 inch barrel, that is to say size cannot be more than 16 inches of circular printed patterns. The cylinder width should be slightly larger than the width of the printed fabric to fabric including selvage within is completely on the printed pattern. Once it is ready, the printing roller can be used almost unrestricted, and there is no problem to print millions of yards of fabric.
Six, screen printing and printing after roller printing
Once the fabric is printed through a screen or a roller, the color is positioned on the cloth, and further treatment is needed to fix the color. A dye used as a dye for printing must be combined with the fiber. The boiling point of printing fabric in the temperature close to or sometimes more than water (high pressure steam) for fixing this step is called steam steaming. After steaming, the fabric through the soap bath to remove other substances used in printing paste and paste in the formula. Finally, the fabric passes through several water washing and drying processes. A large amount of water and heat are needed in the printing process.
In printing, if the pigment is used instead of the dyestuff, the fabric needs to undergo the dry heat treatment up to about 210 degrees Celsius, so that the resin of the fixing coating is solidified. This step is called baking, and no longer needs further processing. Printing with pigments instead of dyes can save a lot of water and energy.
The textile industry usually calls the dyestuff printed fabric called the wet seal cloth, and the pigment printed fabric is called the dry printing cloth. This is because the wet seal cloth needs steam steam, and the subsequent washing is part of the whole process. On the other hand, the printing cloth only needs dry and hot baking as part of the coloring process, without water washing.
Seven. Heat transfer printing
The principle of heat transfer printing is a bit similar to the shift printing method. In the process of heat transfer printing, first print the patterns on the paper with disperse dyes and printing ink, then store the printed paper (also known as transfer paper) for textile printing. Textile printing, heat transfer printing machine, the transfer paper and printing face stuck together, at about 210 DEG C (400t) under the condition of the machine, in such a high temperature, the dye sublimation transfer paper and transfer to the fabric, complete the printing process, does not need further processing. This process is relatively simple and does not require the necessary expertise in the production of roller printing or circular screen printing.
Disperse dyes is the only dye sublimation, in the sense of csgia.net is the only heat transfer printing dye, so the process can only be used in affinity for this kind of dye fiber fabric, including acetate fiber, acrylic fiber, polyamide fiber series (nylon) and polyester fiber.
During the heat transfer printing, the textile printing plant will buy the printing paper from a highly specialized printing paper manufacturer. The printing paper can be printed on the basis of the requirements of the figure designer and the customer (the present pattern can also be used for the printing of the transfer paper) o
Heat transfer printing can be used for printed clothes (such as edge printing, chest pocket embroidery, etc.). In this case, special designs are used. Thermal transfer printing as a method of complete fabric printing from the printing process in talent shows itself therefore, eliminates the need to use, huge and expensive drying machine, steaming machine, washing machine and stretching machine. The printing paper can be tested before printing, which eliminates the inaccuracy and other defects. Therefore, there are few secondary products in the heat transfer printing fabric.
The production speed of continuous heat transfer printing is about 250 yards per hour.
Eight, jet printing and its development prospect
Jet printing of the dye is small droplet and stay in the exact position of the fabric, used to spray nozzle and dye pattern formation can be controlled by the computer, and can obtain accurate and complex pattern repeat.
Jet printing eliminates the delay and cost increase caused by engraving drum and screen making, which is a competitive advantage in the fast changing textile market. The jet printing system is flexible and fast, and can quickly transfer from one pattern to another. Printing fabric tension (that is to say, not because of tension to the fabric surface, pattern distortion) will not be rolling, thus eliminating the raising of fabric or raising potential problems. However, this process can not print fine patterns, and the outline of the pattern is blurred.
Now the jet printing is almost all used for carpet printing. It is not an important process for textile printing. However, by virtue of the research and development of mechanical and electronic control technology, this situation may change. At present, several jet printing machines have been put into textile printing, including the millitron jet printing machine developed by millilin and its company.
Hangzhou FY Textile Digital Printing Co., Ltd
Add: 4th Floor Gaoshida, Xinhua Village, Ningwei Town, Xiaoshan District, Hangzhou, Zhejiang, China
Contact us: Solar Bao