Remscheid, Milan, November 12-19, 2015 – The trend towards spun-dyed yarns continued unabated. The reasons for this are superior color-fastness, cost advantages and, above all, tighter environmental rules and regulations for dyeing works within the Chinese market. One logical consequence is that this trend is also having an influence on the development of microcomponents and original parts. As a technology company, the Oerlikon Manmade Fibers segment focuses on solutions for customer specific requirements and looks into the subject of spun-dying during ITMA.
To this end, the After Sales Services division has developed a new sensor that identifies yarn breaks in particularly critical yarns such as extra-fine or spun-dyed yarns. Conventional optical sensors frequently do not register extremely fine or colored yarns and therefore signal a yarn break which results in a direct interruption to the spinning process. And the black yarns so common in the automobile industry are a particularly serious challenge for sensor technology.
With a second ‘eye’, the new dual sensor of the Manmade Fibers segment can prevent this misdetection, reliably identifying yarn breaks.
New material for yarn guides extends running times considerably
Spun-dyed yarns are a huge challenge for small components used in texturing as well. To this end, spun-dyed yarns result in considerably faster wear to the coatings of yarn guides. And black yarns in particular have a very aggressive impact on yarn guides as a result of their high carbon content. With increasing market shares for black yarns, this is a considerable cost factor for texturing companies.
In trials, the development of a new material for coating the yarn guides has produced outstanding results. Whereas conventional yarn guides used when processing black yarns can in extreme cases be damaged in just two days of operation, the deployment periods have been considerably extended in the case of the new coating. “One of our customers has been running the new yarn guides without any noticeable wear and with outstanding yarn parameters for six months now”, reports After Sales Manager Achim Beul, talking about the new coating in practice.
Due to the extreme loads within the texturing machine, the friction unit inlet guides in the friction units were initially coated with the new material; further yarn guides are currently in preparation.