Thermal transfer and thermal transfer printing process introduction!

The main process of transfer printing:

First, use the computer to separate the patterns. Then, pass the pattern through the high-precision Swiss-made MDC electric engraving machine, Seiko carved first-class quality transfer printing roller (gravure)
The use of electronic engraving roller and ink, the pattern is printed on the special paper, that is, thermal transfer printing paper transfer printing paper after a certain period of time, temperature and pressure control, the pattern is printed on the cloth Finally, the use of printed cloth seams Made a variety of exquisite home textile products, clothing, travel supplies, etc., into thousands of families decorate people's lives!

The advantages and applications of transfer printing:

The transfer printing has the characteristics of lightfastness, washing resistance, strong color fastness, and rich colors. It can be used for the printing of clothing, home textiles (curtains, sofas, tablecloths, umbrellas, shower curtains, bags) and other products. There are hundreds of flowers and fabrics available for selection in the company.

There are several ways to transfer printing?

1. Sublimation method

This is the most commonly used method, using 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 a water-soluble carrier (such as sodium alginate) or an alcohol-soluble carrier (such as B The base cellulose) and the oil-soluble resin are made into an ink and processed on a transfer printing machine at 200 to 230° C. for 20 to 30 seconds to transfer the disperse dye to the synthetic fiber such as polyester and fix it.

2. Swimmer

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.

3. Melting method

The ink layer of the transfer paper is based on dyes and waxes. The ink layer is embedded in the fabric by melting and pressing to transfer some of the ink to the fibers, and then the dyes are subjected to a post-treatment according to the properties of the dyes. When using the melting method, a larger pressure is required, and the dye transfer rate increases as the pressure increases.

4. Ink layer peeling method

Use the ink that can produce strong adhesion to the fiber when exposed to heat, and the entire ink layer can be transferred from the transfer paper to the fabric under a relatively small pressure, and then a corresponding fixing treatment is performed according to the nature of the dye.

Sublimation transfer printing process

Various styles, colors and patterns required by customers are adopted in computer design--Computer separation--Engraving plate-making--wheel gravure printing and heat transfer paper--thermal transfer processing to polyester fiber Fabrics, TC fabrics, long-fluff fabrics, artificial leather and other different materials, the process printing than the traditional screen printing and dyeing, in the rich pattern of the degree, the level of clarity, the color of the bright, realistic degree and environmental protection , Washable, light and feel have greatly improved, is currently the world's most respected and the product to the gentrification of the popular printing and dyeing process!

Sublimation transfer printing principle
Transfer printing refers to the printing process of transferring dyes to fabrics through transfer paper. It is based on the sublimation characteristics of some disperse dyes, selects the disperse dyes sublimated at 150~230°C, and mixes them with the paste to make “color ink”. Then according to different design requirements, the “color ink” is printed to Transfer paper (this is a special kind of paper, it is called transfer paper), and then transfer the printed pattern printed paper and fabric closely, under the control of a certain temperature, pressure and time, the dye from the printing paper Transfer to the fabric, through the diffusion into the fabric inside, so as to achieve the purpose of coloring.
The sublimation method utilizes the sublimation characteristics of disperse dyes, using disperse dyes with a molecular weight of 250 to 400, a particle diameter of 0.2 to 2 microns, and a water-soluble carrier (such as sodium alginate) or an alcohol-soluble carrier (such as ethyl cellulose), oil The ink is made of a soluble resin and is treated on a transfer printing machine at 200 to 230°C for 20 to 30 seconds to transfer the disperse dye onto a synthetic fiber such as polyester and to be fixed. 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 fiber forms volatilization. When the printed fabric reaches the transfer temperature, the dye adsorption begins on the fiber surface until Reach a certain 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 dyeing process, after the dyed material is dyed, the dye content on the paper is reduced, and some of the remaining dye migrates to Inside the paper, the amount of residual dye depends on the vapor pressure of the dye, the affinity of the dye for the paste or transfer paper, and the thickness of the printing film. The sublimation method generally does not require wet treatment, which can save energy and reduce the load on sewage treatment.
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: (1) No water, no sewage; (2) Short process flow, finished product after printing, no steaming, water washing, etc.; (3) fine pattern, rich and clear layers, High artistic quality, strong three-dimensionality, less than the general method of printing, and can print photography and painting style patterns; (4) colorful printing, in the sublimation process, the tar in the dye is left on the transfer paper, will not Contaminated fabrics; (5) High quality product rate. When transferring, multiple sets of color patterns can be printed at one time without the need for flowers. (6) Flexibility is strong. After the customer selects the pattern, it can be printed in a short time.

Source: Wuzhou Search