Fur printing technology | |
Source: China polypropylene network - China Fiber Network's website added: amy69 Add time: 2009-7-23 | |
The suede printing is a process of forming a color pattern on the fur by means of a dye or a coating, by means of a printing plate, such as a rabbit skin, a rabbit skin, a suede skin, a sheep shearing skin, etc., such as a leopard cat, a leopard, a tiger. Patterns such as movements or plant patterns can be used to make collars, hats, garments, trims, etc. These printed products are very popular in the domestic and foreign markets. The suede printing machine prints and the hand prints. This article focuses on hand-printing. The tools used are mainly printing plates, push rolls (or scrapers) and brushes. The printing plate needs to be stretched with a nylon metal (or polyester silk) mesh on a large metal frame or a plastic frame or a wooden frame. The textured portion of the mesh is hollowed out and the polyurethane is not patterned. 1, printing category 1.1 direct printing 1.2 Fading printing The printing plate is covered on the hair quilt, and the fading liquid (made of H2O2) ammonia water, hair-preserving agent and auxiliary agent) is applied to the hair quilt to obtain the desired pattern. 1.3 pull white print 1. 4 smooth leather printing on the smooth surface of the leather surface, the liquid (direct dye, metal complex dye, resin, etc.) is printed by brush or spray method. 1.5 Rolling printing produces uneven patterns (regular or irregular) on the leather surface through flower boards or embossing machines, such as crocodile lines and clear lines. 1,6 transfer printing is first printed on the paper with printing paste, printed into transfer paper, and then the front side of the transfer paper and the leather surface are closely attached, under a certain temperature, pressure, pressure for a certain time, make paper The flower shape on the top is transferred to the leather surface. 2. Screening of dyes When choosing a printing dye, generally consider the following points: 3, the screening of paste The printing paste has a very close relationship with the printing effect. The selected paste should meet the following requirements: the paste and the dye, the compatibility of the auxiliary agent is better; the dispersibility of the paste in the water is large; the moisture content of the paste is small; The adhesion of the material to the fiber is good; the paste should have a moderate wettability; the easy washability of the paste is better. In the printing paste, a certain amount of paste needs to be added, and its function is to transfer chemical materials such as dyes and auxiliary agents to the skin to prevent the pattern from permeating. When the color is fixed, the paste is easily washed away. There are many varieties of printing paste, and it is necessary to optimize the paste which can meet the requirements of the printing process. In the dyeing, water is a dispersion medium of the dye, and in the printing, the paste becomes a dispersion medium of the dye, so the paste is dispersed and aggregated, resulting in uneven printing. Also consider the nature of the paste, which should not react with acids, oxidants, etc. At present, commonly used pastes include starch and its products, gums, sodium alginate, cellulose derivatives and the like. During the test, only starch, gum arabic, SX glue, thickener 44, etc. were compared. The thickener 44 has been used as an oxidative dye printing paste, and the paste does not react with the oxidizing agent, and the printing effect is good, but after the printing is fixed, the paste is difficult to wash off. This paste can be applied, but it is a waste of labor. The SX adhesive is tested, the printing effect is good, and it does not react with the oxidant and the dye. After the printing is fixed, the paste is easily washed away, and is suitable for the oxidation dye printing. Acacia gum (peach gum) is used for BRUSHING DYES printing. It has uniform color and excellent printing effect. It does not lose its viscosity when it meets acid. Because it is expensive, it is practically not used. 4, printing steps 4.1 Material selection According to the sample and user requirements, select the raw material skin that meets the requirements of the process and user for imitation. For example, the yellow wolf skin is like water scorpion, the dry scorpion skin is like water scorpion, and the appearance of the hair should be imagined. The rabbit skin and sheep shearing skin can be like leopard flowers. The raw material skin is selected for printing, and the raw material for rough selection should be selected. For the fur which is depilated, the needle is disorderly, the hair is rough, the carapace, the turtle skin, the broken board, the rotten board, etc. Excluded. 4.2 Raw skin preparation 4.3 Printing is the key process of imitation, and the quality of printing determines the imitation effect. The imitation of the leopard, the center color is deeper than the background color, and the outer ring is black, which needs to be printed on the board. Chemical materials include oxidation dyes, SX glue, penetrants, hair retention agent MF-3, ammonia water and hydrogen peroxide. Before printing, use a brush to smooth the hair. First print the center color and then print the outer ring black. The scraping material should be even and then dried. 4.4 In addition to the deeper hair color of the pulp, the problem of washing and degreasing in water is not big, but when the base color of the hair is white, the washing of the suede is particularly important to prevent contamination of the background. 4.5 saw sawdust (wood raft) 4.6 Printing Precautions (1) After the printing paste is prepared, it is necessary to add an appropriate amount of preservative, otherwise it will be rancid and deteriorated after being left for too long. |
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