(B) of the disperse dye polyester fiber has a hydrophobic crystallization and column high fiber micro gap is small and difficult to wetting puffing characteristics make the dye smoothly the form of a single molecule to enter inside the fiber to complete the dyeing of polyester by conventional methods is difficult, therefore, Checkered Flags Printable requires the use of special staining methods. Currently used carrier method, high temperature and high pressure and high temperature hot melt method, the three staining methods. These methods use different conditions so that the fibers extruded, the gap between the fiber molecules increases, Custom Outdoor Banner Flags while adding additives to increase the diffusion rate of dye molecules, dye molecules continue to diffuse into the puffing and increased fiber gap, with the fibers from the the gravitational force between molecules and hydrogen bonding fixation to complete the dyeing of polyester. Since the solubility of disperse dyes in water is very low, it should rely on the dispersing agent added to the dye solution composed of dye. In order to prevent the disperse dyes and polyester under high temperature and alkali hydrolysis, disperse dyes dyeing is often carried out under weakly acidic conditions. Wind Flags Wholesale
The following were introduced to the three staining methods.
A carrier staining carrier staining is heated at atmospheric pressure. It is the use of some chemicals have a direct dye and fiber, when such chemicals into the polyester internal staining, Checkered Flags Printable the dye molecules also brought in, this chemical is known as vector or to bring the dye.
The use of the principle of the carrier for polyester dyeing aromatic benzene ring in the polyester and the dye molecules have a larger gravitational force between the molecules, polyester adsorption of simple hydrocarbons, phenols, etc., these chemicals become carrier. Due to the interaction between the carrier and polyester, polyester molecular structure relaxation, the fiber gap increases, the molecules easily enter inside the fiber. At the same time, Custom Printed Teardrop Flags due to the carrier itself directly with the fiber and dye molecules, can not only help the dye dissolved dyes single molecule to the fiber surface, Checkered Flags Printable increasing the concentration of the dye on the fiber surface, but also reduce the surface tension of the fibers, so that the movement of the dye molecules rapidly into the fiber gap region, the diffusion rate of dye molecules to promote the combination of dye and fiber, thus completing the staining procedure. After the end of the dyeing, the use of alkaline cleaning, so that the carrier be removed completely. The commonly used carrier o-phenylphenol, biphenyl, methyl salicylate, etc., mostly toxic, harmful, is now rarely used, it is only for general introduction.
(2) high temperature and high pressure high temperature and pressure staining staining in the high-temperature pressure hot and humid state. Dye in the dyeing rate of less than
The high temperature high pressure dyeing of disperse dyes is an important method for the low sublimation fastness and lower molecular weight, low temperature dyes varieties. This type of dyeing levelness, a rich ruby color, feel good, a high degree of fabric through the core, suitable for small batch production of many varieties, commonly used in the dyeing of polyester-cotton blend fabric.
High temperature high pressure dyeing of disperse dyes in the high temperature and pressure jigger and jet overflow dyeing machine, appropriate dye Shennong color, Checkered Flags Printable dyeing pH value is generally in 5 to 6, commonly used acetic acid and ammonium dihydrogen phosphate to adjust the pH value . Remain stable, to make the dye bath dyeing fashion must be added to the dispersing agent and high temperature leveling agent.