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Sublimation transfer process strict control of temperature

posted on 2017-11-06 13:02:39

Sublimation transfer printing appeared in the 1930s and 1970s popular in Europe and the United States, Japan and other countries and regions, from historical data, its development process is rather special. Neither as optimists predicted, with amazing share of textile printing is also not as pessimists say, slow growth, or even stagnation, decline it. Sublimation thermal transfer technology in China's rapid development is relatively wide range of applications. In addition, because of its low investment, pollution, conservation of resources, the effect of outstanding printing characteristics, caused the relevant government departments.

First, the process principle and characteristics

Sublimation transfer printing is a way by printing special printing dye printed onto the transfer paper, then through the heating / pressurizing, the dye transfer technology to the fabric. Specifically, it is based on sublimation properties of disperse dyes, disperse dyes selected sublimation temperature range of 180 ~ 240 ℃, the slurry was mixed with color inks, depending on the pattern / design requirements. Printed way color ink printed onto the transfer paper. The printed patterns, patterns of the transfer paper in intimate contact with the fabric, the handle 10 ~ 30s transfer printing machine at 200 ~ 230 ℃, after diffusion into the interior of the fabric, to achieve the purpose of coloring. In addition to the dye sublimation process directed diffusion tend to the floor under the dyed side Sublimation ink mainly from South Korea and Italy imports expensive) applications and the introduction of digital printing technology sublimation transfer technology more increasingly widespread.

To sum up, dye-sublimation transfer technology has the characteristics of the following four areas:

1.Good printing results. Uses dye-sublimation technology transfer printed fabric patterns fine, colorful, rich layers and clear, high art, three-dimensional sense, it is difficult to do other methods of printing. And can print photography and painting style pattern.

2.Printing soft, long service life. The most important feature is the sublimation transfer dye can diffuse into the polyester or fibers, printed materials feel very soft and comfortable, feel the presence of a basic ink layer. Furthermore, since the ink had dried in the transfer process, the image of life and clothing as long as life itself, will not affect the fabric printing graphic appearance of wear situation.

3.Simple process. Less investment in equipment, high flexibility authentic. When sublimation transfer printing can be a multi-color pattern without having to spend, and can print jobs in a short period of time according to the customer's individual requirements.

4.Saving and environment-friendly resources. Different from traditional textile printing, dye-sublimation transfer printing without steaming, washing and other post-treatment process, saving a lot of water, but no sewage, saving resources and protecting the environment.

Two quality factors

(A) ink

Sublimation ink sublimation transfer technology is the key material is mainly composed of disperse dyes, binders, solvents and a small amount of additives. To dye sublimation transfer and has good permeability. And reach a certain fastness molecular weight of 23O ~ 380, sublimation temperature of 180 ℃ ~ 240 ℃ commonly used dye transfer printing anthraquinone dyes, azo dyes and cationic dyes. Binder to dye affinity is small, easy to dye release gases and have appropriate print ability, preservation and thermal transfer adaptability, commonly used binders are low viscosity ethyl cellulose, ethyl cellulose, ethyl Trail (EHEC), long oil modified alkyd resin. Commonly used solvents are turpentine, terpineol, high boiling alcohol, aromatic hydrocarbons, cello-solve.

(B) temperature and time

Sublimation transfer process requirements to control the temperature in the range of 180 ℃ ~ 230 ℃, time is about 10 ~ 30s, keeping in mind a reasonable allocation of temperature and time.