The selection direction of the gelatinized printing foaming agent
Special chemical gels are used in the printing process highlyseamless mixing with dye.The dye ACTS through the gel’s medium, firmly attached to the fabric,Due to viscosity problems, when glue pulp is produced or used ,it will produce foam and affect the quality and efficiency of printing. Therefore, add a colloidal printing defoamer to solve the foam problem.
Colloidal printing defoaming agent is a special process of ether, lipid alcohol and various active additives.、In the water system, it is easy to disperse, strong self-emulsifying, good defoaming, durable defoaming, especially, it has special effects on water-soluble polymers and medium and low viscosity systems。 It is suitable for latex type water such as phenylpropylene, ethylpropylene, pure propylene, vinyl acetate emulsion and carboxyl butylbenzene especially。It has the characteristics of good defoaming, persistency anti-foaming, good fluidity, low dosage, no floating oil, no fish-eye hole, no influence on product appearance and coating performance.。
1. Air entering the slurry during the mixing process, This kind of mucilage has poor leveling property and swelling appearance;
2. Too much water is added to the pulp production, The thickener forms a pseudoplastic thickening，Charge is generated between the scraper, water and pulp molecules during printing，The watch screen always has irregular small bubbles when it is launched. This phenomenon is the normal glue in the printing will also occur when water dilution;
3. Glue slurry production and some raw materials are not compatible (such as improper selection of antifoaming agents and thickening agents)， In particular, some large area or cover (light oil) printing is not obvious,but when the product finished, or when overprinted multiple times, forms numerous and dense trachoma holes. it can be deadly.
Recommended dosage: the additive amount of gelatine printing defoamer is 0.05~0.3% of the total amount of goods. The appropriate dosage should be determined after the process test. It can also be mixed with other powdery additives.