Page 48 - TEXtalks March/April 2022

Abbildung 4 Abbildung 3

48 150

For many years now the demand for textiles 100
for a growing world population with Temperature [°C]
constantly increasing requirements can only 50
be met with a high share of synthetic fibers.
With its excellent price-performance ratio as
well as its outstanding properties, polyester 0 0 50 100 150 200 250
(PES) has become established as the Time [min]
dominant fiber type. Among the items made
of polyester there are some segments for Classic dyeing process
which disperse dyes with a high washing 150
fastness are required, such as work wear and
functional sportswear. Microfibers and fiber
blends with elastane in particular require dyes 100
with the highest level of washing fastness. Temperature [°C]
CHT Switzerland AG, the competence center 50
for dyes and pigments of the CHT Group, is
based in Montlingen and focuses on the
development, production and sale of textile 0
dyes and supplies dyes for a wide range of 0 50 100 150 200 250
requirements. Time [min]
Optimized dyeing process with BEMACRON HP-LTD,
The disperse dyes in the BEMACRON HP CHT DISPERGATOR XHT-S and EGASOL UP
range are high-performance products that
provide excellent washing fastness levels on
all PES grades and blends and prevent
staining of accompanying fibers.
BEMACRON HP dyes are classified in three the dyeing process can be optimized to
subgroups: BEMACRON HP, BEMACRON such an extent that the dyeing time can be
HP-LTD and BEMACRON HP-S. This reduced by up to 40 % and the power
classification makes it easier for users to Washing fastness 60 °C of all BEMACRON HP-S dyes on PES/EL 83:17 consumption by up to 30 % in comparison
select the right dye to suit their individual Abbildung 5 with classic dyeing processes. Although
requirements. BEMACRON HP includes an the dyes can be used at 120 °C with the
extensive range of products from classic exhaust process, they still have a low
dyes with a high washing fastness to special Performance sublimation tendency and are ideally
and high-brilliance dyes and therefore covers suited for use in the pad-dry thermosol
a very wide color space. process.
HP-LTD
BEMACRON HP-LTD are specially developed With the latest development in the field of
disperse dyes with a high washing fastness HP-S disperse dyes, CHT Group has succeeded
and a good color build-up at a lower dyeing in combining the top properties of the
temperature. As even dark shades can be HP globally track-proven BEMACRON HP
dyed at 120 °C, BEMACRON HP-LTD dyes range with maximum economy. The result
are ideal for gentle dyeing of PES/EL blends is the compact BEMACRON HP-S range,
with optimum conservation of the elasticity, which contains technically high-quality
e.g. for sportswear or medical articles. dyes and offers an extremely advanta-
Dyeing at 120 °C not only significantly geous price-performance ratio. Despite
reduces deposits of PES oligomers on fibers the economic advantages, no compromis-
and machinery, the lower dyeing temperature es were made in terms of washing
also contributes significantly to energy and Costs fastness, so that even in the case of
time savings, boosting productivity and Positioning of the BEMACRON HP ranges PES/EL items with a high elastane content,
increasing sustainability in equal measure. staining of accompanying fibers is effec-
Especially when combined with the highly tively prevented.
effective dyeing auxiliaries
CHT-DISPERGATOR XHT-S and EGASOL UP,
March/April 2022