Printing paste and auxiliary solvent problems and solutions

High-quality textile coating printing production is closely related to the rheological properties of printing pastes. Printing pastes are emulsified pastes and synthetic thickeners. At present, many printing and dyeing plants still use emulsifying paste as a thickening agent for printing pastes. The emulsified paste has a relatively small thixotropy, and its finished printed pattern has high outline definition and good vividness. Emulsifying paste has many characteristics, but it must use (135 ~ 240) dye solvent oil (also known as dye aid oil) and fatty alcohol polyoxyethylene ether (Ping Ping plus type 0 surfactant), made under high-speed dispersion conditions . With the continuous rise of oil prices in the international market, and the large amount of smoke generated in the drying and baking process of the color paste to the atmosphere, polluting the atmosphere has not been widely applied.

All-phase paint printing paste is produced by adding a synthetic thickener in a certain proportion of water under high-speed stirring conditions. Although its printing performance can not be completely compared with the emulsified paste, it is conducive to the protection of the environment. In the synthesis of Ciba's thickeners, high-quality petroleum is used firstly, and secondly, the content of effective polymers is increased, the thickening efficiency is high, and the release of hydrocarbons during the synthesis of thickeners is improved.

Thickeners on the market generally have a high solids content of 50% and a low solids content of 25%, while Ciba's new PTP solids content is as high as 65%. The general thickener produced by the reverse phase polymerization method has a hydrocarbon content of 20% to 25%, whereas PTP has only 7% and PTI only 4%. Conventional thickener releases 10kg/t of oil to the atmosphere, while PTP only releases 0.6~0.7kg/t. The oil meets the environmental and environmental requirements for purification. The United States Carbon Corporation's emulsifying thickener R-28, although the solid content of 28% to 29%, the conventional dosage of 3% to 3.5% per 100 kg of printing ink, but does not contain oil, and paste into a transparent , It is environmentally friendly. The synthetic thickener HIT from BASF, Germany, is resistant to mild electrolytes, has good print rheology and is affordable, and is used in a large number of factories in China. The representative of the domestic thickener is KG-201. After using it for a few times, the manufacturer can choose according to the specific situation.