Industry News

If the printing auxiliaries are dangerous goods


Chemical fiber oil agent is dangerous, part of the dye additives and silicone oil.  Actually, you can see it in the classification.  Dyeing agent includes dyeing agent, leveling agent, fixing agent and dispersing agent. 

The desizing, scouring, bleaching and mercerization of the fabric are important processes before the printing and dyeing of the fabric, which is called scouring.  Scouring is to boil the desized cotton fabric in 10g/L dilute caustic soda solution for several hours, in order to remove cotton fiber cotton shell, wax, pectin substances, nitrogen substances, pigments and other impurities as well as residual pulp on the cloth, in order to obtain a good appearance and water absorption performance, effectively improve the effect of printing and finishing.  Synthetic fibers do not need to be boiled, but fabrics blended with cotton fibers still need to be boiled. However, soda should be used instead of caustic soda. In Su Ting, a solution of caustic soda with a lower concentration is used.  Some surfactants should be added to the scouring solution to improve the permeability of the lye, promote the emulsification of the wax, and further disperse the impurities from the fiber in the scouring solution.  The printing additives coating printing is by virtue of the film forming effect of adhesive insoluble dye firmly adhered to the fabric, so as to achieve the purpose of coloring.  Binder is the main element of the pigment printing paste, is a kind of high polymer film-forming material, through the film coating adhesion on the fabric, therefore requires sticking agent for fabric have training of adhesion and reproducibility, described, solvent resistance, resistance to acid and alkali resistance, resistance to chemicals, film-forming clear transparent, don't change color, not injury fiber after printing, have certain elasticity, feel is good,  And easy to remove from the printing machine.  Thickener is another important component of paint printing paste, it has the function of thickening color dyeing, promoting adhesion and emulsification, and the use of printed fabric to obtain uniform, soft profile clear pattern.  Not only can improve the color and brightness, and printing pulp without or less kerosene, to leap less pollution to the air.  There are two types of synthetic thickeners: anionic and non-ionic. The former has strong adaptability and can be used to prevent dyeing and dye printing, but the thickening effect is poor.  The latter has high viscosity and thickening effect, and has no adverse effect on the brightness, scouring fastness and softness of printed fabric.  The main role of cross-linking agent is to improve the fixation ability of the adhesive, the use of printing has good firm performance, but also reduce the baking temperature, combined with the actual short baking time, but the dosage should be appropriate, otherwise it will cause poor feeling of the fabric hand.  The addition of emulsifier is to get a good emulsifying thickener, generally using end group closed alkyl phenol polyoxyethylene ether, and then isocyanate closed end group.  Coating printing additives and softener, diffuser and defoaming agent.  Dyeing agent dyeing is the main body of the dyeing process, different fiber fabrics using different color agents, and according to the different process, dye processing AIDS help solvents, dispersants, chromogens and phthalocyanine additives.  The dyes used in dyeing are indirect dyes, VAT dyes, reactive dyes, phthalocyanine dyes and insoluble azo dyes.  Levelling agent levelling agent includes natural fiber levelling agent, synthetic fiber levelling agent and blended fabric levelling agent. As a levelling agent, the condition is that the dye can be absorbed slowly by the fiber or the dark part of the dye can be spread to the light part without reducing the degree of dyeing firmness.  All AIDS with slow dyeing and moving dyeing are called leveling agent.  Fixing agent there are three kinds of fixing agent, cationic surfactant, no surface activity of quaternary ammonium salt and resin fixing agent, fixing agent will make the dye into insoluble dye salt, or make the dye molecules increase and difficult to dissolve in water, so as to improve the firm degree of dyeing.  Dispersant dispersant is an indispensable additive in dye processing and dye application, it can make the dye particles disperse to about 1μm, help to crush, maintain the stability of dye dispersion, dispersant for various types of superficial agent, including anionic, cationic, non-ionic, amphoteric type and polymer type.  Fluorescent brightening agent Fluorescent brightening agent, referred to as FWA, turns the yellow-brown pigment on the fabric that cannot be removed by chemical bleaching into white by means of optical complementary color effect. Due to the enhanced luminosity, the whiteness becomes more gorgeous.  Softeners are mostly fragrant, aromatic agents, dyes are mostly petroleum derivatives, containing benzene, if manufacturers use poor grade of raw materials will also cause irritation to the skin.  Clothes in the washing process, fines often winding, intertwined, and even break, clothes after repeated washing, detergent, alkaline role makes fiber smoothness, extensibility and flexibility of the inherent affected, show is the whole clothes look worn out, didn't shape, touch touch is stiff, clothes washing the more this feeling is more obvious.