Statimat 4U

Automatic Linear Density-,
Twist-, and Tensile Tester
for High-Tenacity Yarns



Automatic tensile tests on yarns with high linear
density and breaking strength demand special requirements
regarding clamps, measuring system,
sample waste disposal, and mechanical stability
of the testing equipment. This particularly applies
to technical yarns comprising high-tenacity
polymers such as Aramid or UHMWPE. Here
force-measurement limits of 1000 N and mechanical
stress limitations for such test equipment are
insufficient in most cases. In addition, the clamps
of the automatic tensile testing equipment are often
inadequate for withstanding breaking forces of this



Determination of the yarn twist

A further and innovative function of the automatic
rotary clamp is the optional automatic determination
of the yarn twist. In addition to the classical
automatic twist test on spun yarn according to the
un- and re-twisting method, filament- and plied
yarns can now be tested in fully automatic way,
too, under certain conditions. The test method can
be combined with automatic tensile and / or count
testing for maximum testing efficiency.


For fully automatic yarn linear density measurements
the STATIMAT 4U can be fitted with the
AUTOCOUNT system. This consists essentially of
a yarn collecting chamber and an electronic balance.
Here the nip roll feed system measures the
length precisely and feeds a yarn length into the
AUTOCOUNT collecting chamber. The yarn linear
density is determined on the basis of the weight
and the length of the yarn sample.

Additional clamps

In addition to standard tensile tests carried out on
yarns, the STATIMAT 4U can also be used within
the permissible force range of 5.000 N to carry out
tensile- and elasticity tests on fabrics and cohesion
tests on slivers and rovings. For this, various
special clamps for manual introduction of the test
sample are available as replacements for the automatic
yarn clamps.
Especially the combination of automatic yarn
testing with fabric testing makes this instrument
very interesting for weaving- and knitting mills,
allowing the automatic checking of the incoming
yarn material as well as the quality control of the
end product.

Narrow tapes, artificial grass,
and monofilaments

New fields of automatic tensile testing have been
opened by the development of a mechanical clearing
of the yarn remnants after breakage. With this
feature the STATIMAT 4U allows fully-automatic tensile tests of monofilaments with diameters up
to 1 mm, sticky and very coarse yarns, e.g. waxed
sewing threads, as well as narrow tapes, split
yarns, etc. for the production of artificial grass