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Transfer printing has several methods such as sublimation, bathophoresis, melting and ink layer stripping. Among them, transfer printing with the sublimation method is the most mature.
The sublimation method is the most commonly used method. It utilizes the sublimation characteristics of disperse dyes, using disperse dyes with a molecular weight of 250-400, a particle diameter of 0.2-2 microns, and water-soluble carriers (such as sodium alginate) or alcohol-soluble. The carrier (such as ethyl cellulose) and the oil-soluble resin are made into ink, and are processed on a transfer printing machine at 200°C to 230°C for 20 to 30 seconds to transfer the disperse dye to synthetic fibers such as polyester and fix it.
The sublimation process generally goes through three processes: Before the transfer process occurs, all the dyes are on the printed film on the paper, the dye concentration in the printed fabric and air gap is zero, and the size of the air gap depends on the structure of the fabric, the yarn count And transfer pressure. In the transfer process, when the paper reaches the transfer temperature, the dye begins to volatilize or sublimate, and the concentration of the paper and the fiber evaporates. When the printed fabric reaches the transfer temperature, the dye adsorption begins on the fiber surface until it reaches a certain degree of saturation. value. Since the transfer of dye from paper to fiber is continuous, the rate of adsorption depends on the rate at which the dye diffuses into the interior of the fiber. In order to enable the dye to be directed and diffused, a vacuum is often applied to the underside of the dyed material to allow the dye to achieve directed diffusion and transfer. After the transfer process, after the dyed product is stained, the dye content on the paper is reduced, and some of the remaining dye migrates to the inside of the paper. The amount of residual dye depends on the vapor pressure of the dye, the affinity of the dye to the paste or transfer paper, and the printing film. thickness of. The sublimation method generally does not require wet treatment, which can save energy and reduce the load on sewage treatment.
The dye in the transfer paper ink layer is selected according to the nature of the fiber. The fabric is first padded with a mixture of a color fixing aid and a paste, and then transferred by hot pressure in a wet state. The dye is transferred from the transfer printing paper to the fabric and fixed, and finally steamed and washed. Wet processing. When the dye is transferred, a large amount of pressure is required between the fabric and the transfer paper.
Melt transfer paper ink layer with dye and wax as the basic components, through the melt press, the ink layer embedded in the fabric, so that part of the ink transferred to the fiber, and then according to the nature of the dye for the corresponding post-processing. When using the melting method, a larger pressure is required, and the dye transfer rate increases as the pressure increases.
The ink layer peeling method uses the ink that can produce strong adhesion to the fiber when exposed to heat, and the whole ink layer can be transferred from the transfer paper to the fabric under a relatively small pressure, and then the fixing process is performed according to the nature of the dye. .
In addition to synthetic fabrics, transfer printing can also be used for the printing of natural fiber pure spinning and blended fabrics. It has the following advantages: Short process flow, finished product after printing, no post-processing process such as steaming and washing; simple equipment, low investment, small footprint, low energy consumption; fine pattern, rich and clear layers, artistic High, strong three-dimensional, not for the general method of printing, and can print photography and painting style patterns; printing colorful, in the sublimation process, the tar in the dye is left on the transfer paper, will not contaminate the fabric; genuine With a high rate, multiple sets of patterns can be printed at one time without the need for flowers; the flexibility is strong, and customers can print them in a shorter period of time after selecting the pattern, and can also be printed on the clothes besides the printed flower heads. Transfer printing on the finished product, such as the top of the clothing collar, cuffs, pockets on the partial printing.
Transfer printing also has its disadvantages. For example, 80% of transfer printing is used for polyester fabrics, 10% for polyester blended fabrics, and 10% for acrylic, nylon, acetate fiber, etc. For natural fiber fabrics, mass production is not yet available. The scope of use is subject to certain restrictions. In addition, a large amount of paper needs to be consumed. In addition to the transfer paper, a backing paper is also required. Therefore, the area of ​​the consumed paper is twice that of the printed fabric, and the disposal of the leftover paper is also a problem. In addition, the production efficiency of transfer printing is relatively low. The output of a transfer printing machine is 3 to 4 m/min, and the high one is only about 8 m/min. It is only applicable to small batches and many varieties.
★ Available lengths: 66 inch, 60 inch
★ It`s available with 7`` rim faucet drillings or without.
★ Can be painted in any colour of your choice.
★ The hard surface is durable, easy to clean and resistant to stains.
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Anping Sunshine Sanitary Ware Co., Ltd. , https://www.sunshinebathtub.com