ES-7 Sodium Lignosulfonate Dye Dispersant

ES-7 is the premium grade of the Jiefa ES series for disperse and vat dyes and a replacement for REAX 85A. With heat stability ≥155 °C and 130 °C high-temperature dispersibility A/5, it stays adsorbed on the dye crystals under high temperature and high shear: the spray-drying tower can run hotter for higher output, and dyeing shows fewer dye specks and dye blotches — especially in package dyeing, warp beam dyeing, microfibers and polyester–spandex stretch fabric.

• Dispersant desorbs and degrades under high temperature and high shear, capping spray-drying tower temperature
• Liquid dyes shipped in containers at 55–60 °C coarsen, thicken, gel or separate
• Free tar separates in HTHP dyeing, causing dye specks, dye blotches and tar stains
• Sensitive dyes darken and show a shade difference between the inner and outer layers of a yarn package

Textile Dyestuff Industry

• Heat stability ≥155 °C: no desorption or heat degradation, so the spray-drying tower can run hotter for higher output and lower cost
• Storage stability: liquid dyes stay free of coarsening, thickening, gelation and phase separation on long voyages
• Tar encapsulation: solubilizes, emulsifies and encapsulates press-cake tar in dispersant micelles, even during HTHP dyeing
• Stable shade of sensitive dyes: color strength and shade hold in storage; less inner-to-outer shade difference in package dyeing
• High-temperature dispersibility A/5: stable dye-blend systems and less batch-to-batch shade variation

• Disperse dyes
• Vat dyes
• Yarn dyeing
• Beam dyeing
• High-temperature dyeing processes