Page 47 - TEXtalks March/April 2022

46 47

For many years now the demand for textiles
for a growing world population with
constantly increasing requirements can only Abbildung 1
be met with a high share of synthetic fibers.
With its excellent price-performance ratio as
well as its outstanding properties, polyester BEMACRON Citron HP-2G 100 80 C.I. Yellow 211
Versatile of polyester there are some segments for –60 –40 –20 60 40 20 20 40 60 C.I.Orange 30
(PES) has become established as the
BEMACRON Yellow HP-2R
dominant fiber type. Among the items made
which disperse dyes with a high washing
fastness are required, such as work wear and
functional sportswear. Microfibers and fiber
BEMACRON Rot HP-FS
blends with elastane in particular require dyes
C.I. Red 167
with the highest level of washing fastness.
80
C.I. Blue 60
disperse dyes CHT Switzerland AG, the competence center Abbildung 2 Achievable color space with highly brilliant BEMACRON HP dyes
–20
for dyes and pigments of the CHT Group, is
C.I. Blue 183
based in Montlingen and focuses on the
–40
development, production and sale of textile
–60
dyes and supplies dyes for a wide range of
BEMACRON Turquoise HP-B
BEMACRON Royal HP-RD
requirements.
–80
The disperse dyes in the BEMACRON HP
compared to widely used commodity dyes
range are high-performance products that
30
for the highest provide excellent washing fastness levels on K/S 25 5 0 the dyeing process can be optimized to
all PES grades and blends and prevent
staining of accompanying fibers.
20
BEMACRON HP dyes are classified in three
15
such an extent that the dyeing time can be
subgroups: BEMACRON HP, BEMACRON
reduced by up to 40 % and the power
10
HP-LTD and BEMACRON HP-S. This
consumption by up to 30 % in comparison
classification makes it easier for users to
with classic dyeing processes. Although
select the right dye to suit their individual
the dyes can be used at 120 °C with the
demands requirements. BEMACRON HP includes an 25 0 1 Typical color build-up of dyes with a high washing fastness exhaust process, they still have a low
4
2
3
Dye concentration [%]
extensive range of products from classic
––– 130 °C ––– 120 °C Dyeing temperature
sublimation tendency and are ideally
dyes with a high washing fastness to special
suited for use in the pad-dry thermosol
and high-brilliance dyes and therefore covers
process.
a very wide color space.
30
With the latest development in the field of
BEMACRON HP-LTD are specially developed
disperse dyes with a high washing fastness
in combining the top properties of the
20
and a good color build-up at a lower dyeing
globally track-proven BEMACRON HP
temperature. As even dark shades can be K/S 15 disperse dyes, CHT Group has succeeded
dyed at 120 °C, BEMACRON HP-LTD dyes 10 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, 5 which contains technically high-quality
e.g. for sportswear or medical articles. 0 dyes and offers an extremely advanta-
Dyeing at 120 °C not only significantly 0 1 Dye concentration [%] 3 4 geous price-performance ratio. Despite
2
reduces deposits of PES oligomers on fibers ––– 130 °C ––– 120 °C Dyeing temperature the economic advantages, no compromis-
and machinery, the lower dyeing temperature es were made in terms of washing
also contributes significantly to energy and Simultaneous color build-up of BEMACRON HP-LTD at 120 °C fastness, so that even in the case of
time savings, boosting productivity and versus a dyeing temperature of 130 °C 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 March/April 2022