Favimat + Favigraph

Automatic Single-Fibre Testers



Testing and evaluation of a wide range of fibre
properties are essential for research and quality
control purposes in fibre production and for assessing
the processability of fibres in carding and
spinning. For man-made fibres and in some cases
even for natural fibres these tests are carried out
on single fibres. Here, typical testing methods
are the static tensile test, linear-density
(fineness) measurement, and measurement of
crimp extension, crimp stability as well as number of crimps.




The design of the FAVIMAT+ takes into account
any needs to combine single-fibre linear-density
measurements and tensile tests with
different crimp test methods into a single testing
instrument. All of these tests are carried out on the
same fibre section. Transferring the fibre from one
testing device to another is, therefore, no longer
necessary. This results in a significant reduction in
both operator input and expenditure as well as a
reduction in possible fibre damage when compared
to multiple measurements carried out on alternative
independent devices.
The FAVIMAT+ incorporates two additional measuring
systems located in the tensile testing section.
The high-resolution load cell enables accurate
adjustment of specified pre-tensions, as well as the
measurement of extremely low tensile forces when
determining fibre crimp properties or testing
nano-structures. To ensure highest measuring
accuracy, computer-aided calibration of all measuring
systems can be carried out automatically.


The FAVIGRAPH combines linear-density
measurements and tensile tests in one test
equipment. Here the linear-density measuring
head, which is based on the FAVIMAT+ technology,
is situated adjacent to the tensile test section.
The innovative characteristic of the FAVIGRAPH
is a transfer clamp between the two measuring
systems, into which the appropriately pre-tensioned
fibre is manually loaded. At the start of the test the
transfer clamp is positioned above the linear-density
measuring head. First, the linear density of the
fibre is determined. Thereafter, the transfer clamp
turns to the tensile test section and places the fibre
into the measuring- and draw-off clamp. During the
tensile test it is already possible to insert the next
fibre into the linear-density measuring head.
As a consequence, continuous parallel operation of
both systems is ensured. With corresponding short
fibre breakage times, cycle times of 15 sec are
easily achieved resulting in a test output of 240
fibres per hour.
Moreover, a special advantage of the FAVIGRAPH
is that the operator handles the fibre only once
when introducing it into the transfer clamp at the
linear-density measuring head. Compared to conventional
systems, where two independent testing
instruments necessitate separate introduction of
each fibre, the FAVIGRAPH technology signifies a
substantial reduction in both work input and
possible fibre damage.