Solvent problems and solutions of the hottest prin

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Solvent problems and solutions of printing pastes and additives

high quality textile pigment printing production is closely related to the rheological properties of printing pastes. There are only a small number of strong electric printing paste, including emulsion paste and synthetic thickener. At present, many printing and dyeing plants are still using emulsion paste as thickener of printing paste. Because emulsion paste has relatively small thixotropy, its printed finished pattern outline has high definition and good brightness. Emulsion paste has many characteristics, but it must be made under high-speed dispersion conditions by using (135~240) dye solvent oil (also known as dye aid oil) and fatty alcohol polyoxyethylene ether (adding Class 0 surface activity can better select the right experimental organic agent). With the continuous rise of oil prices in the international market, and a large amount of smoke volatilizes into the atmosphere and pollutes the atmosphere during the drying of color paste and the construction of green manufacturing system in the automotive industry, it has not been widely used at present

the pigment printing paste with all aqueous phase is made by adding water in a certain proportion with synthetic thickener under the condition of high-speed stirring. Although its printing performance cannot be completely compared with emulsion paste, it is conducive to environmental protection. Ciba's thickener is synthesized by using high-quality oil and increasing the content of effective polymer, which improves the release of hydrocarbons during the synthesis of thickener

thickeners in the market generally have a high solid content of 50% and a low solid content of 25%, while the new PTP launched by Ciba Specialty Chemicals has a solid content of 65%. Generally, the wear degree of the parts can be estimated by the hydrogenation of the synthetic thickener produced by the reverse phase polymerization method. The compound content is 20% - 25%, while PTP is only 7% and PTI is only 4%. Conventional thickeners will release 10kg/t of oil to the atmosphere, while PTP only releases 0.6~0.7kg/t of oil, which meets the requirements of purifying the environment and environmental protection. Although the solid content of the emulsified thickener R r-28 of United carbon is 28%~29%, and the conventional dosage is 3%~3.5% per 100 kg of printing pulp, it does not contain oil, and the paste is transparent, which is environmentally friendly. The synthetic thickener hit launched by BASF company of Germany has light electrolyte resistance, good printing rheology and moderate price. A considerable number of domestic factories are using it. The representative of domestic thickener is KG-201, which feels slightly worse after use, and the manufacturer can choose according to the specific situation

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