With the introduction of the rotating tangle unit RoTac³ at Domotex 2015 held from January 17 to 20 in Hanover, the Oerlikon Segment Manmade Fibers wants to pave the innovative way for the future of BCF technology. Oerlikon Neumag’s exhibition highlight enables substantial energy savings and creates many further advantages for the production of BCF carpet yarn with the 3-end plant S+.
The tangling or intermingling plays a decisive part in the production of BCF yarns. Through the tangle knots, loop formations are prevented when tufting and weaving the carpets. Furthermore, they also define the colour mixtures of tricolor yarns and thus enable a homogenous appearance of the so-called tricolor carpets. The constant increase of productivity respectively, the process speeds implicated increasing demands on the tangling, resulting in higher air pressures and a double tangling unit. The compressed air consumption significantly increased. Additionally, the so-called tangle dropouts occurred at very high process speeds.
“The RoTac tangle unit has been the effective solution for the single-end BCF plant Sytec One since 2012. In the meantime, practically all Sytec Ones are sold with the RoTac. However, in order to use this technology for our flagship S+, a considerable amount of detailed work was necessary”, stated Mathias Stündl, Head of BCF Development at Oerlikon Neumag.
The new RoTac³ is perfectly tuned for the 3-end BCF plant S+. In comparison to conventional tangle units, the RoTac technology forms the tangle knots with a pulsating instead of a continuous air current. The core element of the RoTac is a rotating nozzle jacket which has several holes with a corresponding spacing according to the required number of knots. If a hole is positioned over the compressed air opening, an air blast is released and tangles the yarn. Therefore compressed air is only consumed if a tangle knot is to be formed.
The necessary volume flow and therefore the energy consumption are significantly reduced. In comparison to conventional tangle units, the compressed air consumption is reduced by up to 50 per cent. Therefore the RoTac³ has been granted the e-save label for particularly energy-efficient and eco-friendly technologies.
This principle enables the RoTac³ to generate tangle knots with defined distances and controllable strengths. Tangle drop-outs are reduced and downstreaming performance improved. A very gentle yarn treatment reduces the yarn tension. The resulting, better process stability is very beneficial for future trends such as fine deniers and demanding polymers.
RoTac³ is immediately available for the BCF plant S+ and can be retrofitted in the already existing S+ plants.
Furthermore, Oerlikon Neumag will also be showing its BCF product portfolio: S+ and Sytec One at Domotex 2015. The three-end S+ produces high-quality BCF yarns and serves a very wide titer range (600 to 4000 dtex). All polymers, from polyester to polypropylene up to polyamide 6, can be processed on these multi-polymer plants without conversions being necessary, whereby the machine utilizes the applied raw material to 99%.
“Whereas the S+ is convincing for commercial applications, the Sytec One is particularly suitable for the demanding production processes because of the one-end application. With the S+ and Sytec One, we are excellently positioned on the global BCF market and can practically fulfill nearly all the customers’ requests”, ensures Martin Rademacher, Sales Director, BCF.
Interested professional visitors can experience the production platform of both plants together with the RoTac³ literally live in a three-dimensional Virtual Reality Show on Oerlikon Neumag’s booth at Domotex. The interactive presentation gives the observer a completely new perspective on sequences, machines and plants.
It is the first time for Oerlikon Neumag’s BCF Technology Symposium to take place in Hanover. This annual forum previously always took place as a one-day event at the company headquarters in Neumünster, and presented fascinating market subjects such as recycling or the growing significance of PET to a professional audience from all over the world.