Shanghai Garment polyester fabric printing process printing, please find free proofing Shu Yi

Shanghai Garment polyester fabric printing process, please find Shu Yi free proofing printing apparel printing step first step, the fabric is dyed monochrome horses, the second step, the pattern printed on the fabric. Note the second step of the printing paste containing dye can damage the background of strong bleach, so use this method to produce blue and white dot pattern fabric, garment printing [] This process is called white discharge. When the bleach does not it reacts with dye mixed in the same color paste (vat dyes are of this type), it can be color pull printing. Therefore, when a suitable yellow dye (eg vat dyes) are mixed with color bleach together, you can print out the yellow dot pattern on blue fabric. Because the garment printing background is the way to use the piece dyeing dyed, if the background is printed with the Montreal printing up compared to the background color should be rich and much deeper. This is the main purpose of using garment printing. Clothing printed fabric through roller printing and screen printing printed, but can not be printed by thermal transfer printing. As compared with direct printing, drawing printed fabric high production costs, but also must be very careful and accurate control of the use of the reducing agent required. Using this approach garment printing fabric, better sales, higher price level. Sometimes, the reducing agent used in this process can cause damage to the printing pattern of the fabric or destroyed. If the two sides of the same color background of fabric (as is the piece dyeing), but the pattern is that the background is not white or the same color, you can confirm the discharge printing fabric; carefully check the pattern of negative, will revealing traces of the original background (the reason for this phenomenon is the destruction of dye chemicals can not fully penetrate to the reverse side of the fabric). Direct printing Direct printing is a white fabric or directly on already pre-dyed fabric printing in. The latter referred to overprint. Much deeper, of course, color prints than dyed background. Number of common printing methods are direct printing. If the fabric background is white or mostly white, and prints from the back looks better than positive light color, then we can determine which is directly printed fabric (Note: Due to strong penetration of printing paste, so thin this method can not determine the fabric). If the positive and negative shades of the same fabric background (as is the piece dyeing), and prints much deeper than the background, so this is an overprint fabric. Transfer printing transfer printing means by the transfer sheet to the dye transfer printing process of the fabric. It is based on a number of characteristics of sublimation disperse dyes, selected 150 ℃ ~ 230 ℃ sublimation disperse dyes, slurry is prepared by mixing it with the "color ink", according to the requirements of different designs, the "color ink" printed transfer paper, and then close contact printed patterns of transfer paper and fabric, in the case of controlling a certain temperature, pressure and time, dyes from printing paper transferred to the fabric, after diffusion into the interior of the fabric, so as to achieve coloring purposes. Sublimation transfer printing method, a swimming shift method, several methods fusion method and an ink layer separation method. Among them, the most mature sublimation transfer printing. This sublimation method is the most common method, properties of disperse dyes by sublimation, a molecular weight of 250 to 400, a particle diameter of 0.2 to 2 microns disperse dyes and water-soluble carrier (e.g. sodium alginate) or alcohol carrier ( such as ethyl cellulose), oil soluble resin printing ink, for 20 to 30 seconds in the 200 ℃ ~ 230 ° C transfer printing machine, so that disperse dye transfer to polyester and other synthetic fibers and fixation. Sublimation law generally go through three processes: the process takes place before the transfer, all dyes are printed on paper film, printed fabrics dye concentration is zero and the air gap, the size of the air gap depends on the structure of the fabric, yarn and the transfer of pressure. During the transfer, when the paper reached the transition temperature, the dye began to volatilization or sublimation, and between the paper and the concentration of volatile fibers which, when printed fabrics to achieve transition temperature, the fiber surface began the dye absorption, until it reaches a certain saturation value. Due to transfer dye from the paper fibers are ongoing, the adsorption rate depends on dye diffusion rate inside the fibers. To make dye diffusion can be directed, often evacuated at the dyed side, so that the dye reaches directional diffusion transfer. After the transfer process, after the dyed colored dye content decreased paper, part of the remaining dyes migrate into the interior of the paper, the amount of residual dye depends on the vapor pressure of the dye, dye affinity pulp or transfer paper and printing film thickness. Sublimation law generally does not require wet processing, can save energy and reduce the load on sewage treatment. Swimming shifting method transfer paper ink layer dye selected based on properties of the fiber. After fixing the fabric first aid and burnt material composed of a mixture of a padding process, then in the wet state by hot-migration, so that the dye is transferred from the transfer printing paper to the fabric and fixed, the final steaming, washing and other wet processing. When the dye transfer, between the fabric and the transfer paper need to have greater pressure. Melting method transfer paper ink layer dye and wax as a basic ingredient, by melt pressure, the ink layer is embedded in the fabric, so that part of the ink transferred to the fiber, and then make the appropriate post-processing according to the nature of the dye. When using the melting method, the larger the pressure needed, the dye transfer efficiency improves with increasing pressure. The ink layer after lift-off method using the case of thermal energy to produce strong adhesion ink fibers at small pressure can make whole ink layer from the transfer paper transferred to the fabric, and then make the appropriate solid color processing according to the nature of dyes . In addition to the transfer printing suitable for synthetic fabrics, but can also be used for natural fiber spinning pure and blended fabric printing. It has the following advantages: a short process, and India after the finished product, do not need steaming, washing and other post-processing; equipment is simple, small investment, small footprint, low energy consumption; fine pattern, the level of rich and clear, artistic high, three-dimensional sense of strong, as the reach of the general method of printing and can print photography and painting style pattern; printing colorful, in the sublimation process, dye tar residue in the transfer paper is not soiled fabrics; Authentic rate, when transferring a printed multi-color pattern can but need not to spend; flexibility, customer selected pattern can be printed out after a short period of time in addition to the printed fabric horse head outside, but also in clothes the finished re-transfer printing, such as T-shirt collar, cuffs, pockets of local printing. Transfer printing there are shortcomings, such as transfer printing of 80% for the polyester fabric, 10% for polyester blended fabric, 10% for acrylic, nylon and acetate fiber and other fabrics, natural fiber fabric for mass production yet, use subject to certain restrictions. Also need to consume a lot of paper, in addition to the transfer paper, but also need the backing paper, so the consumption of paper is printed fabric area twice, for the remaining paper handling is also a problem. There are lower transfer printing production efficiency, yield a transfer printing machine 3 to 4 m / min, the higher is also only 8 m / min or so, only suitable for small quantities of many varieties. [2] screen printing screen printing clothing basic principle: The screen plate of unique technology, combined with photographic exposure of the photoresist, which makes the pattern to be printed mesh minister turned part, non-pattern portion is in the closed state. When printing, silk screen role since the squeegee squeegee, so that by the silk screen printing pigment paste 孔顺利 penetrate into the fabric surface, so printing material printed on the clothes, thereby completing the printing process. Due to market factors, will cause the fabric color and fabric varieties Diversity (1) Clothing water paste printing: only for white or light-colored T-shirt printing or other garment printing, printing paint ratio is reasonable as long as you can do it soft, color fastness! But sometimes, there will be some inevitable shortcomings, because the main ingredient is water modulation water slurry, water, and is a colorless, transparent liquid, is unlikely to cover the darker fabric , it is difficult to do the printing on dark fabrics. (2) clothing mortar printing: a darker shirt printing or other garment printing, printing in the selection of material, try to choose high-elastic Lycra mortar printing, the aim is to increase the printing site fastness and elasticity, making it pull extension, prints the site easy to crack. Disadvantages: Such printing material, because of its resin component factors, determines that it can not have water paste printing so soft hand. Pros: You can express in any one color on dark fabrics text you want, and can do three-dimensional super, especially in terms of the printed cartoon images, you can do dynamic. NOTE: In the mortar inside the appropriate modulation of some foam material, to be stir evenly, you can do three-dimensional effect and imitation flocking foam snowflake effect. (3) Solid ink printing thermal clothing: heat-ink printing, the material is very delicate and full of elasticity, this ink resin particle diameter relatively fine, good elasticity India, the general effect was slightly better than the market's glue, color fidelity than the high, and feel also relatively soft mortar. The disadvantage is that the cost is slightly higher than the mortar printing, it is generally only the big brands for demanding high-end apparel printing, as well as characters such as a color dot printing. Garment screen printing Comprehensive advantages: plate cost is relatively low, the printing process is simple, convenient, tight for some time, a small number of apparel printing and processing of orders to better highlight the advantages of her speed to catch the goods. The screen printing process, widely used in fields such as T-shirt printing, shirt printing, advertising shirts printing. Such as the use of special pulp can also print out: discharge printing, printing penetration, bronzing, flocking, plate printing, printing and other printing process silica.