TENSILE STRENGTH TESTING

Automatic Tensile-,
Evenness-, and
Count Tester

n the production of staple fi bre- or fi lament yarns
as well as in twisting or texturizing operations
quality control serves to secure material properties
which ensure trouble-free downstream processing
as well as fl awless fi nal products. On the other
hand, by routine testing of yarns it is possible to
recognize faults in the production process early
enough to analyze the causes of such defects and
to take corrective actions.
The most important properties of yarns are tensile
strength and elongation, mass unevenness, and
yarn count (linear density). Static tensile tests, yarn
evenness tests, as well as various methods of yarn
count testing, e.g. by means of wrap reel and
balance, serve for the assessment of these yarn
properties. The operation of different test equip-
ment to which the yarn samples are presented one
after another, results in high expenditure of labour
and, especially in case of modern automatic
computer-controlled testing equipment, in
considerable fi nancial investment.