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Fibre length- and strength tester

Key fibre characteristics of cotton

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 is usually measured on a bundle of fibres according to the Fibrograph system. This test is based on an optical scanning device and delivers various parameters characterizing fibre length distribution.

Fibre strength is measured on fibre bundles, too. As the fibre bundle strength depends on the measurement of strength it requires measuring of the tensile forces as well as 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 (HVI). The latter employ measuring systems which have to be calibrated using so-called calibration cotton. For this reason all measured results depend on the data of the calibration cotton as specified by its supplier. They are not directly traceable to physical base units.

FIBROTEST

FIBROTEST
FIBROTEST
This new tester of Textechno incorporates both fibre length measurement and fibre strength test within the same instrument. The two measurements – at first fibre length and thereafter fibre strength – are executed in succession on the same sample. After completing these measurements the sample size between the clamps is automatically determined, which enables to calculate the exact and absolute value of tenacity. Operation of the FIBROTEST does not require calibration cotton and is, therefore, independent of any influences from this side. Nevertheless the system can be calibrated with calibration cotton to duplicate HVI results.

Use 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. Unavoidable fibre mass variation along the sample holder is – different from conventional testers – compensated by the FIBROTEST optical system with high lateral resolution. After inserting the sample holder into the tester all test functions are executed fully automatically.

Control of the test process as well as measured data evaluation featuring printout of individual values and their statistical analysis is provided by the Textechno TESTCONTROL system, consisting of PC and Textechno software.

Technical data

  • Preparation of the fibre bundle with standard comb-type sample holder
  • Optical system with laser light and line camera scanning the fibre bundle in longitudinal  direction,
    scanning width 60 mm,  max. travel 50 mm
  • Tensile strength- and elongation measuring  system with automatically operated pneumatic clamps,
    draw-off clamp on motor-driven traversing carriage,
    gauge length 1/8 inch,
    strain gauge with force range 500 N
  • Automatic determination of sample size between clamps

Further technical data 

Mains supply:

230 V, 50 (60) Hz, current requirement approx. 1,6 A

Compressed-air supply:

6 bar, 50 l/min

Lacquer finish:  

RAL 9006/5002

Dimensions:

Height 410 mm, width 700 mm, depth 550 mm, weight approx. 45 kg

The above technical contents can be subject to changes by Textechno.

 
 
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