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The Textile Magazine
JUly 2012
was significantly simplified, espe-
cially in the area of defect classifi-
cation. Defect patterns now enable
the operator to simply classify
defects allowing similar defects to
be found in the next pass.
Process control segment
The Atmoset SMT-12 from
Mahlo facilitates product-dependent
control of the heating capacity of
cylinder dryers. With these dry-
ers the heating capacity is usually
optimised to the heaviest product.
Because the web speed or the
capacity cannot be simply adjusted
for lighter products, the product is
dried excessively and much energy
is wasted.
Mahlo has found a means of
controlling the capacity of the drier
in a quick, simple and reliable
manner through residual moisture
measurement and feedback of the
condensate temperature of the dry-
ing cylinders.
The Atmoset SMT enables a
stable and effective drying process.
The optimal degree of drying is
always reached, regardless of the
weight of the product or the web
speed. Continuity of the produc-
tion process and reproducibility
of the product quality are ensured.
The energy consumption of the
dryers drops significantly due to
the optimised heat output. This
saves energy costs.
The development of sensors at
Mahlo has not stagnated either.
New sensors are employed either
in the quality management sys-
tem Qualiscan QMS-12 or in the
stenter control system Optipac
VMC-12.
X-ray transmission sensor
Gravimat FMXT permits the
contactless and traversing meas-
urement of grammage/thickness
of the running product webs
over the entire product width.
The properties of the material
are determined precisely based
on the X-ray absorption of the
material. The X-ray tube with-
out radioactive isotope emitter
can be deactivated and does not
require approval. It possesses su-
perb resolution for precise profile
control. High-quality compo-
nents guarantee high measuring
accuracy and service life.
The Infrascope NIR provides
the spectral fingerprint of the
product web. With a resolution of
256 measurements a complete spec-
trum is always scanned. This allows
scanning the moisture, grammage,
coating application and composi-
tion with a single sensor for suitable
materials. So far the Infrascope can
be employed in the nonwoven and
plastic areas.
Air permeability measurement
Airpro APM is a completely new
sensor. This measuring head was
developed in co-operation with the
renowned Textest AG from Swit-
zerland. Airpro APM allows for
a highly dynamic and traversing
measurement of air permeability
and pressure drops on the running
ITMA Asia + CITME 2012