Clothing culture knowledge: fur printing technology

Fur printing is the use of dyes or paints, with the help of plates, through the physical and chemical reactions, the formation of color patterns on the fur process, such as rabbit skin, Rex rabbit skin, suede, Sheep skin, etc. can be imitation leopard cat, leopard, tiger Etc. Orchids and other plant patterns, can be used for making collar, hats, clothing, trim and so on. These printing products are popular in domestic and foreign markets. Fur printing machine printing and hand printing, this article focuses on manual printing, the tools used in printing, push (or scraper) and brush. Plate production needs to be large metal frame or plastic frame or wooden frame stretched nylon filament (or polyester silk) net, the pattern in the mesh Wang hollow mesh, no pattern painted polyurethane. Printing, the paste is scratched through the mesh and printed on the fur, in order to reduce costs, you can also use tinplate, zinc plate, plastic plate and other materials carved hollow plate. Printing, the printing plate covered in fur, brush dipped in paste, brushing on the printing plate, you can get the desired pattern on the fur pattern. Printing board specifications depending on the product circumstances, a large printing plate similar to the size of fur mat (120cm * 62cm), but also the size of a rabbit skin board for single-sheet printing. Imitation tiger pattern when the first need to dye the ground, the preparation of a single color paste, Imitation leopard have to dye the ground, to be equipped with two kinds of paste, two plates (Fahua board, black circle board) Or about color, leaves green or black, whether it is the center color, or outer ring color, the color of the material composition of the dye () or paint, paste, additives, hair maintenance agents, color agents and fixing agents . 1, printing category 1.1 direct printing 1.1.1 Screen Printing Low-damp dyes, such as oxidation dyes, TIPPINGDYES, BRUSHINGDYES, are applied to the fleece by double-sided or veneer. 1.1.2 The printing plate will be printed on the plate covered in hair or skin on the board, with a good slurry with a brush on the fur brush can be. 1.2 fade printing plate to cover the hair on the fade liquid (H2O2) ammonia, hair maintenance agent, additives formulated) brushing on the hair, that is, the desired pattern. 1.3 pull white printing 1.3.1 with acid dyes with LOWACENEDYES, LOWACENEASSISTBH, LEVELA, formic acid, water dubbed the dye solution, the temperature 60-65 degrees Celsius, time 2h. 1.3.2 The printing plate covered in the dyed hair. BLEACHLCN-1 or LCN-3110g. Formic acid 400ml water 500ml Brushing white liquid brushing or sprayed on the hollow board. 1.4 glossy blanket leather printing in the matte leather surface, the liquid (direct dyes, metal complex dyes, resins, etc.) with a brush or spray method of printing. 1.5 Rolling stamping through the flower board or embossing machine in the leather surface with uneven patterns (with or without rules), such as crocodile pattern, such as Zi-pattern. 1, 6 transfer printing first with printing paste printed on paper, printing into a transfer paper, and then the front of the transfer paper and the leather surface in close contact with a certain temperature, pressure, pressure for a certain period of time, so that the paper The flower on the transfer to the leather surface. 2, dye screening When printing dyes should generally consider the following points: (1) Dye color mixing performance When printing, you must choose the performance close to the dye spell color, that the skin fiber affinity and diffusion rate similar to the effective control of shade. (2) leveling performance Relatively speaking, a dye in the skin fiber affinity greater diffusion rate is lower, poor mobility, inevitably cause leveling agent to solve the problem of leveling. When printing, this problem is not significant, as long as the choice of leveling dye on the line. (3) Various fastness indicators Acid dyes, oxidative dyes, TIPPINGDYES and BRUSHINGDYES have different printing effects on wool. If acid dyes are used, dyes can not diffuse inside of inverted fibers due to temperature and other conditions, and only Adsorption on the surface of wool fibers, the fastness index simply can not talk about it, it should not be used, oxidation dyes, such as TIPPINGDYES can be combined with wool fibers at low temperatures, suitable for fur printing. (4) Dyeing dye dyeing performance Liu dye can be printed dark, on the contrary, only printed light-colored, neutral dye component, which in combination with the skin fiber amino bond in addition to rely on the salt, but also rely on hydrogen bonds And van der Waals forces, so you can use it to print dark colors. In summary, the best for leather printing with direct dye or liquid gazella dyes. For hair printing can only use ammoniated dyes, TPPINGDYES, BRUSHINGDYES. 3, the sieve made of paste Printing paste and printing effect is very closely related to the choice of paste to meet the following requirements: paste and dye, additives better compatibility; paste dispersion in water to be large; paste moisture content is smaller; paste The adhesion of the material to the fiber is better; the paste should have a moderate wettability; the paste is easy to wash. Printing paste, the need to add a certain amount of paste, its role is to dye, additives and other chemical materials passed to the skin to prevent the pattern infiltration. When fixing, the paste is easy to wash away. More printing paste varieties, must be optimized to meet the printing process requirements paste. In dyeing, water is the dye dispersion medium, and printing, the paste that is the dye dispersion medium, so the paste dispersed and gathered, resulting in uneven printing. At the same time also consider the nature of paste, it should not react with acids, oxidants and so on. At present, the commonly used paste starch and its products, gum, sodium alginate, cellulose derivatives. During the experiment, only starch, gum acacia, SX glue, thickener 44 and other comparative tests. Starch granules amylose and amylopectin two components, before the chain molecules, the latter for the branched-chain molecules, which are the basic elements of glucose in a glucose. However, the two are different in nature, amylopectin is not easily hydrolyzed, can be suspended in water, and heated to swell to become a highly viscous suspension. Amylose is easily hydrolyzed. After heated to become a colloid expansion, viscosity and permeability than amylopectin. Among the different starches, the content of amylopectin is quite different. The content of amylopectin in wheat starch is 15%, the content of amylopectin in potato is 1% -2%, most of amylopectin is amylopectin. Because the starch molecular end with hidden ligand, it has reducibility, when the degree of polymerization is high, the reduction is not obvious, such as reducing the degree of polymerization of the polymer, the reducing increased. When the hair is oxidized by the printing, such as the use of starch paste, will play an oxidant, such as the use of starch paste, will play an oxidant, such as the use of starch paste, redox reaction will inevitably consume a large amount of oxidants affect the dye and The combination of fibers, even pale color. Therefore, the use of oxidized dye printing, starch paste should not be used. Thickener 44 has been used as oxidation dye printing paste, the paste does not react with the oxidant, the printing effect is good, but printing fixation, the paste is difficult to wash off. This paste can be applied, just washing labor. SX glue on the test, the printing effect is good, do not react with oxidants and dyes, printing paste fixing paste easily washed away, suitable for oxidation dye printing. Gum arabic (peach gum) for BRUSHINGDYES printing, uniform color, printing effect is excellent, the case of acid without losing the viscosity, due to expensive, in fact, not much application. 4, printing steps 4.1 Selection of materials According to sample and user requirements, select the raw materials meet the process and user requirements for imitation. For example, the yellow wolf skin imitation mink, marmot mink imitation, from the appearance of wool to imagine, Rex rabbit skin, sheepskin sliver skin can be imitation leopard flowers. Raw material selection of the right side of the skin can be printed, raw material for roughing but also for selection, on the hair removal needle, needle hair disorder, knot hair, dry coke hair, turtle skin, broken board, rotten board and other defects to the fur Be removed. 4.2 original skin preparation 4.2.1 pretreatment Fur used in printing, often fur color varies shades, colors and to be imitated fur color larger, so the hair before printing need to be processed, such as the drift needle or fade. The first treatment of fur with formaldehyde (re-tanning) before bleaching, the skin can resist the role of hydrogen peroxide. 4.2.2 Dyeing Background For natural white or faded fur, it must be dyed or dyed to a color similar to that of the fur to be imitated. 4.3 printing is the key process of imitation, printing quality is good or bad, determines the imitation effect. Imitation leopard, the central color than the background color to deep, the outer ring is black, need a set of printing and dyeing. Chemical materials have oxidation dyes, SX glue, penetrant, Moisturizer MF-3, ammonia and hydrogen peroxide. Need to use a brush before printing hair, first printing center color black outer ring, scraping material to be uniform, and then dry. 4.4 In addition to the deep pulp of the pulp was printed, washing water slurry is not the problem, but the fur color is white fur printing, in addition to washing, pay special attention to prevent contamination of the background. 4.5 End sawing (wood bran) Drum with sawdust and brightener and other rotating drum, the hair is loose, bright and in addition to floating color. 4.6 Printing Precautions (1) printing paste with a good, to join the right amount of preservative, or place too long will be spoiled spoilage. (2) The preparation of the paste can not be too thin, leaving room for adding proper dye water, that is to say, if the paste is very thin, it will be even thinner when it is added into the dye water and can not be printed. (3) When the paste, dye and other materials are all added later, such as the generation of bubbles, defoamers can be added. (4) If there are two plates need color, you should pay attention to the position of the two plates to prevent the pattern from misplaced. After printing for the first time to dry after chromatography, to prevent pollution. (5) printing, the best push by hand operation, to prevent mistakes or uneven force, so as to avoid inconsistencies in the pattern depth.