well-known and proved automatic tensile testers for yarns (STATIMAT) and fibres (FAVIMAT, FAVIGRAPH), automatic crimp-contraction testers for textured yarns (TEXTURMAT), or dynamic filament-yarn testers for POY, FDY, FOY, DTY, and BCF (DYNAFIL).

At the forthcoming ITMA Textechno will present several new and innovative testers.

Automatic tensile-, evenness- and count tester STATIMAT DS

The most important properties of yarns are tensile strength and elongation, mass unevenness and yarn count (linear density). Static tensile testers, yarn evenness testers, as well as various apparatus for yarn count testing, e.g. by means of wrap reel and balance, serve for the assessment of these yarn properties. The use of different test equipment, to which the yarn samples are presented by the operator one after another, results in high expenditure of labour and, especially in case of modern automatic computer-controlled testing equipment, in considerable financial investment.

Such shortcomings are overcome by the new STATIMAT DS, which combines testing of tensile properties, unevenness, and count of yarn and thread in one tester. The three tests on each package presented by the package changer are performed in succession. Optionally it is possible to test unevenness and yarn count in one test run, which enables to relate the results of both measurements to the same tested yarn length.

A further optional accessory is an optical entanglement sensor to measure interlaces in a multifilament yarn.

With regard to testing technology and technical realization the STATIMAT DS offers numerous technical and technological novelties – for example a patented new capacitor design for measurement of unevenness –, united with a new design philosophy.

Essential advantages of the STATIMAT DS:

Common use of all peripheral components of the tester like package changer, threading mechanism for inserting the yarn sample into the test sections, yarn feeding device, waste yarn disposal, instrument housing with protective front panel, as well as control electronics including the PC-based Textechno TESTCONTROL system for the different test modules built in, which leads to a very economic price of the STATIMAT DS compared to 3 separate testing appliances.
The operator has to present the test samples (yarn packages) only to one instead of several different testers, which results in considerable time- and labour savings. All measured data are presented in one test protocol, so that the data can be easily interrelated, for example to calculate tenacity from the measured strength- and yarn-count values.

More information about the new STATIMAT DS can be found here . 

Weak spot tester DYNAJET

Breaking strength is an important characteristic of a yarn with regard to its performance in downstream processing and to the properties of the ready-made fabric. Conventional tensile tests determine the tensile strength – average value and coefficient of variation – from a relatively small number of measurements on yarn sections of typically 500 mm length. On the other hand, staple-fibre spun yarns inevitably contain so-called weak spots with very low breaking strength, for example thin places, yarn segments with inclusions of foreign matter, or sections with thermal damage, which are normally not detected in such standard tensile tests as they occur in very low numbers over kilometers of yarn length.

The concept of the new DYNAJET focuses at detecting such weak spots on the running thread at high speed. For this purpose the yarn passes with up to 1000 m/min through a test section and thereafter through a nip-roller/apron feeding device into a suction orifice. Within the test section the yarn is subjected to a tensile force which remains absolutely constant throughout the test. The level of this tensile force can be freely selected to simulate actual manufacturing process conditions. In case of yarn rupture the tester stops immediately for subsequent rethreading.

Beside its very high level of efficiency the test method is characterized by its particular simulation of manufacturing processes. In both cases the yarn runs with high speed into a zone with high tensile stresses, resulting in extremely high rates of loading.


The DYNAJET offers to all yarn-processing units a new and extremely efficient method to measure weak spots in a particular yarn material, and to forecast from this the expected number of yarn breaks in further processing. Such measurements can be an important support to the yarn-purchasing department. On the other hand, knowing the frequency of weak spots can help to adjust manufacturing conditions in order to minimize ends down in a process.

More information about the new DYNAJET can be found here . 

Fibre length- and strength tester FIBROTEST

Fibre length and breaking strength determine to a large extent the processing of cotton fibres into yarns and the properties of the yarn itself. Fibre length measurements according to the FIBROGRAPH system, in which the individual fibre length is optically measured on a fibre bundle, feature a number of different parameters such as 2.5 percent and 50 percent span length, mean length, etc.

Fibre strength is measured on fibre bundles, too. As this bundle strength depends on the thickness of the fibre bundle, precise measurement of strength in g/dtex requires weighing of the fibres between the clamps with high accuracy.

Present testing instruments are either purely manually-operated devices for each of the two test methods, or fully automatic "high-volume" test stations requiring calibration with calibration cotton.

The new FIBROTEST of Textechno incorporates both fibre length measurement and fibre strength test within the same instrument. Both measurements – at first fibre length and thereafter fibre strength – are executed in succession. After completing these measurements the sample cross section between the clamps is automatically determined, which enables to calculate the exact and absolute value of tenacity (cN/dtex or psi). In this way problems resulting from the use of "calibration cotton" are absolutely avoided.

Operation of the tester is simple and straightforward: The operator prepares the sample with the same type of sample holder as used in other equipment known on the market, inserts the sample holder into the tester, and starts the test. Results for fibre length and strength of one sample are available after less than half a minute.

More information about the new FIBROTEST can be found here .