Page 75 - TEXtalks. May-June 2023

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Create new effects and designs a process development company specifically for the
Contactless rotor spray dyeing opens up completely textile industry. RotaSpray is a 100% member of the
new possibilities in fashion design - directly in the WEKO Group who is manufacturing rotor spray
dyeing process. For example, one-sided dyeing or application systems and spray nozzle systems for
overdyeing without penetration. Multicolor dyeing powders for diverse industries such as Nonwoven,
uses several dyes in one liquor or one after the other Textile, Paper, Tissue, wood panel boards, Foils,
(dye baths are without contact and remain metal, and many more. Both companies together
contamination-free). Deliberate creation of vintage, offer you the latest spray dyeing and spray finishing
salt & pepper, slub yarn look, and much more only by technologies for textile processing with in total more
varying the spray parameters. Open up new
possibilities for your customers. than 400 installations worldwide in the textile market.
In finishing the companies offering solutions for
Small scrap stenter frame lines to substitute the padding process
Due to the larger number of spray points, and work with strongly reduced pick-up on the same
homogeneous dyeing is produced without tailing or quality result.
side-center variations. Due to the non-contact
application, liquor contamination, different ITMA 2023
substantivity behavior of the dyes, or even possible Experience the new rotor spray dyeing and finishing
hydrolysis do not play a role. In particular, the method live at ITMA 2023 and visit us at RotSpray /
separation of certain processes ensures a stable and WEKO booth B103 in hall 14. The team looks forward
easily reproducible result. to having a coffee with you!

Who is RotaSpray? Contact: RotaSpray GmbH . Tobias Schurr
RotaSpray GmbH is a German machinery info@rotaspray.de . www.rotaspray.com
manufacturer of rotor spray application systems and www.weko.net
Today's processes often have the problem that small Today's standard - Pad-Dry-Pad-Steam process for
lots can't be produced cost-efficiently because the fabric
start-up scrap is too high and the preparation The Pad-Dry-Pad-Steam process (PDPS) is
sometimes takes too long. considered the worldwide standard in continuous
dyeing with reactive and vat dyes and is very widely
With the latest German developments of the used in the main textile countries for mass
RotaSpray PS² process, the continuous dyeing production. The PDPS process covers the entire ROTOR SPRAY
process is rethought and enables sustainable, easily color space in all color depths. In Europe, this Rota pray
reproducible, and waste-minimized production. process can hardly be used economically anymore problems and high wastewater treatment costs. excellent transfer from laboratory to production. DYEING & FINISHING Member of WEKO Holding
Especially for reactive, VAT and disperse dyes. due to the ever-decreasing batch sizes. Because this
process is not suitable for small-lot production The new standard - PS² (Pad-Spray-Steam) for fabrics Short steaming time and salt-reduced to salt-free
Due to the non-contact rotor spray application, dyes because of a strong tendency for tailing at the start of Instead of the two-bath application of dye and fixation production Revolutionary Rotor Spray Technology helps you to signi-
and auxiliaries are applied homogeneously on one or each batch. Also, it is a very energy-intensive bath with energy-intensive intermediate drying To increase reactivity, it is possible to increase the ficantly reduce your CO footprint in the area of dyeing and

2
both sides. The penetration level can be adjusted by process based on intermediate Thermosol (Thermosol), the rotor spray process can be used to alkalinity of the alkali by up to one pH level compared finishing due to contact-free minimal application methode.

using the flexible rotor spray parameters and the processing. The high amounts of salt used in the dye apply the respective fixing bath directly after the dye to the standard recommendation. This allows
selection of the correct auxiliaries as required. recipe for reactives lead to additional ecological bath without intermediate steps - because the reduced steaming time by up to -50%. Keep in mind Eliminate tailing, center side variation, substantivity and
non-contact application means that the dye remains the overall footprint of a PS² line is much more hydrolise issues to reduce your scrap rate. Produce excellent
stable on the fabric and the fixing chemistry is not compact and investment is far less than in a Tobias Schurr. Sales and Marketing Director. Weitmann & Konrad GmbH & Co. KG. Germany quality in Dyeing & Finishing with reduced costs.
contaminated or affected in any way. This helps to conventional PDPS line. A so-called dilution effect
drastically reduce energy costs and CO² emissions. due to padder and wet-on-wet spray application and Reduced migration tendency, better long-term quality the use of water, wastewater, energy auxiliaries, and YOUR BENEFITS
time are parallel resulting in a cost-cutting industrial
an associated loss of fixing yield in deeper shades The lack of intermediate drying additionally reduces dyeing process with lower CO² emission.
Small scrap should not become unmentioned here. This loss of the migration tendency of the dyes to the surface of • Low pick-up of 10-35%
In addition the PS² process is mainly characterized yield in darker shades can be compensated by the fabric and leads to a better full-body dyed quality. • Low drying energy
by the minimization of the tailing during the start-up adding only a small amount of Glauber's salt (up to After several household washes, this effect turns out After use, only 8 - 25 l of fluid has to be emptied, but • Less water and chemical usage Hall 14 / B103
of the dye set. These are mainly caused by hydrolysis to be very positive. this is not contaminated by the WEKO process and, • Fast job to job changeover
and substantivity effects with reactive dyes and are 80 g/l) to the spray liquor. Light to medium shades depending on the type, can possibly be re-used. • Lower production costs
almost unavoidable despite optimum dye selection in are dyed salt-free. In general, the leachability of the Sustainable spray dyeing solution
the classic pure padder process. In the PS² process, reactive dyes in the PS² process is greatly improved With the latest developments of RotaSpray and Especially for large dye baths as in the DENIM Ask our experts for more information how YouTube Video

tailing can be reduced from up to 200 m in padding by the reduced salt load, thus reducing water WEKO, the entire dyeing process is revolutionized slasher area, the water reprocessing plants can also to raise your profitability and sustainability!
down to 2-20 m in rotor spray technology with consumption. and made more sustainable. A strong reduction in be massively relieved.
CREATE MORE SUSTAINABLE FASHION! www.weko.net
May/June 2023