Textile Oligomer Removal Agent

Oligomers are low molecular weight cyclic compounds that form inside polyester fiber during polymerization and manufacturing. They remain trapped in the fiber structure until the fiber is exposed to high temperature, particularly in high temperature dyeing above 100 degrees Celsius. At that point the oligomers migrate to the fiber surface and can deposit as specks or a powdery layer. They can also transfer to machine walls and yarn guides, which causes fouling and fabric surface defects.

When applied within the recommended dosage range, the effect on shade is minimal and Delta E typically remains below 0.3 for most disperse dyed shades. Excessive dosage can affect shade or color depth, and the recommended range should be followed. Pre-testing on the actual fabric and shade before bulk production is advised, particularly for pale and sensitive shades.

Yes. The removal agent can be used in combination with reduction clearing agents or as part of a combined process stage. The two functions are complementary: reduction clearing removes unfixed disperse dye, while the removal agent disperses and solubilizes oligomer deposits. Compatibility should be pre-tested for the specific grades involved, and the pH and temperature conditions must be appropriate for both products.

Selected grades can be used for machine cleaning to reduce oligomer buildup on dyeing machine walls, yarn guides, rollers, and heat exchanger surfaces. The cleaning procedure involves running the product at the recommended dosage and temperature, followed by rinsing. Severity of buildup and cleaning frequency determine the result. The technical service team can advise on a cleaning procedure for a specific machine configuration.

Yes. The removal agent can be applied to polyester and cotton blends, but the processing conditions must be appropriate for both fiber components. Temperature and pH should be selected so that the cotton component is not damaged. In some cases the removal stage is combined with the soaping stage of the reactive dyeing process for the cotton component. Pre-testing on the actual blend ratio is recommended.

Foam generation depends on the specific grade and the machine turbulence. Low-foam and controlled-foam grades are available for jet, overflow, and high turbulence equipment. Dosage control and correct dilution also reduce foam generation. Grade selection should be based on the specific machine type and process conditions. Technical data sheets provide foam profile information for each grade.

Store in a cool, dry area away from direct sunlight. Protect from freezing below 5 degrees Celsius. If the product freezes, thaw slowly at room temperature and stir before use. Keep containers closed when not in use to prevent contamination. Shelf life is 12 months in the original unopened container under recommended conditions.