Oerlikon Barmag recently introduced a solution for the efficient production of both spun-dyed polyester pre-oriented and fully drawn microfiber yarns when using the EvoQuench radial quenching systems.
Excluding black, the dyes deployed in spin-dyeing are typically azoic dyes or organometallic complexes. These aromatic-based molecule systems can decompose at the high melt temperatures and evaporate directly underneath the spinneret. Consequently, contamination of EvoQuench’s sieves could lower their service life and the evenness of the yarn.
For this reason, the special design for spun-dyed yarn protects the sieves against contamination caused by evaporating dye particles.
The sieves installed in the EvoQuench last for a longer amount of time, which ensures consistency among yarn quality over long production periods. It also helps reduce downtimes and consumption costs.
People in the industry increasingly prefer spun-dyed yarns because the process results in even dyeing and is generally cleaner.
The advantages of EvoQuench are copious. Delivery and installation times are relatively low, which offers a quicker return on investment. It also saves energy: EvoQuench reduces air consumption by 80 percent (or 20 million cubic meters per position and per year).