Yarn strength measurement – and protection
against quality claims
Uster Technologies launches the new USTER® TENSOJET 5.
Yarn producers today know that both quality and performance
are essential if they are to meet the continually-rising demands
of their customers in the weaving and knitting mills. Yarns must
have the look, feel and functionality to satisfy these
requirements. With the launch of the USTER® TENSOJET 5, the
concept of tensile testing is extended to provide a total
package: precise measurement of a yarn’s strength, combined with
reliable protection against quality claims based on accurate
forecasts of performance in later processes.
A priority for any yarn is the ability to withstand
downstream processes – without causing stoppages or affecting
production efficiency. Whatever the fabric application, it is
high-speed weaving and knitting which exert the greatest stress
and strain forces on the yarn. So its strength and elongation
properties must be suitable for the fabric-making process, as
well as for the ultimate end-use.
USTER® TENSOJET 5 – The WEAVABILITY Measurement
Minimum strength and elongation properties are needed to
prevent a yarn breaking or being damaged in downstream
operations, as well as avoiding blemishes on end-products in
weaving. So accurate tensile-strength values are important,
particularly for warp yarns, which are placed under tremendous
USTER is committed to meeting the industry’s need for
increasingly effective and accurate tensile testing. For
decades, USTER® laboratory instruments have set the global
standards for strength and elongation measurement of staple, as
well as filament, yarns.
In 2018, a new generation has been launched. The USTER®
TENSORAPID 5, the ‘go-to’ tensile tester providing precise data,
was introduced in March. Now, the most comprehensive tensile
tester ever is introduced: the USTER® TENSOJET 5 can operate at
speeds of 400 m/min and integrates with the Total Testing Center
to deliver a new range of overall benefits to both quality
assurance and profitability for yarn manufacturers.
WEAVABILITY and profitability
The high speed of 400 m/min actually simulates the dynamic
stress on the yarn during weaving, and this makes the USTER®
TENSOJET 5 a unique tensile measuring system. It is the standard
for prediction of WEAVABILITY by giving an accurate forecast of
yarn behavior in subsequent processing, especially on
high-performance weaving machinery. Fewer weak places in the
yarn mean higher efficiency on downstream machines. The
prediction of WEAVABILITY increases economic efficiency, as well
as weaving quality and profit margins.
The USTER® TENSOJET 5 performs 30,000 tests per hour,
producing accurate data through this extensive and rapid
measurement. Utilizing this great volume of data is what makes
it possible for the system to predict weak places in the yarn.
This important forecasting function would otherwise be difficult
or impossible to achieve – and is way beyond the capability of
other conventional testers. Graphic tools such as scatter plots
show all significant information at a glance. Seamless
correlation with USTER® STATISTICS benchmarks makes USTER’s
WEAVABILITY System an essential instrument to minimize claims
and to drive producers towards higher profitability.
Tearing function of the tensile measuring system.
Total Testing Center: The claim-free
Ultimate process control comes with the connection to USTER®
TESTER 6. The integration of results with USTER® TESTER 6 allows
users to profit from intelligent alarms through the Total
Testing Center. Smart reports integrate results from both
evenness and tensile tests, providing an overview of the quality
being produced. Data analysis through connected laboratory
instruments allows fast decision-making by the mill, to
guarantee customer satisfaction with the yarns being delivered.
The Total Testing Center thus aims to provide a ‘claim-free’
system for yarn producers.
Only through the Total Testing Center is it possible to
obtain clear visualizations of weaving performance. This is
provided in the form of objective grades, predicted by a
combination of strength testing parameters from USTER® TENSOJET
5 and yarn quality parameters from USTER® QUANTUM 3 yarn
clearers – then collated and interpreted by the Total Testing
Center. The weaving performance information is ranked on a scale
from one to five Qs (grades) to allow spinners to identify
batches with a high risk of yarn breaks during weaving – and to
avoid complaints to a large extent.
The total package of major advantages means USTER® TENSOJET 5
is acknowledged not only as the industry’s ultimate tensile
tester, but also as a key element in a the growth of a spinning