① Sublimation transfer paper: the requirements for sublimation transfer paper are dust-free, burr-free, defect-free, stable size, and controlled air permeability to meet the printing requirements. Easy to release dyes, high thermal strength, low dye gas permeability to meet the transfer requirements. The suitable transfer paper is 50-70 g / m ^ 2, and the natural polymer materials are starch, gum arabic, and sodium alginate.
② Disperse dyes: the requirements for disperse dyes are good sublimation transfer and permeability; To a certain extent, the color fastness index was achieved; Under the operating conditions, all kinds of dyes have good coordination and achieve the purpose of trichromatic coloring. Disperse dyes with a molecular weight of 230-380 and sublimation temperature of 180-240 ℃ are usually selected. The coloring effect is related to the dye type, molecular weight, sublimation property, and the structure of the colored polymer. There is a strong force between the dye gas and the molecule, and it can diffuse into the fiber. The optimum sublimation temperature is below 200 ℃.
③ Binder: the commonly used solid resins are low viscosity ethyl cellulose, ethyl hydroxyethyl cellulose, etc., the commonly used solvents are turpentine, terpineol, high boiling alkanol, aromatic alkane, fiber dissolving agent, etc., and a small number of other additives. The main requirements for the binder are low affinity with dyes, easy release of dye gas, suitable printability, preservation, and heat transfer
Adaptability, etc.
④ Ink formula: the key of screen printing sublimation transfer paper production is to prepare ink. According to different requirements, the content of dye varies from 5% to 18%.
In foreign countries, sublimation transfer printing has been put into industrial production for a long time and is still growing. In recent years, our country also produces on different scales. At present, most of our country use offset or gravure printing paper, a small number of use platform screen printing machine, circular screen printing paper is still to be developed, with the popularization and further development of screen printing technology, it is expected that the use of screen printing machine, water quality or emulsion ink printing sublimation transfer paper will have a greater development. Because this will bring economic benefits to the industries directly engaged in printing and dyeing, coloring, and decoration.