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CAT NO: DIDACTICNLE-Export-390005
Crimp Tester For Testing Lab Workshop.
Crimp Tester - For Testing Lab
The crimp in a yarn is defined as the mean difference between the
actual length of any yarn and its apparent length in the fabric after
weaving. It is usually expressed as a percentage of the apparent length
of the yarn in the fabric.
Determination of the crimp of
yarn is carried out by marking a known length on the fabric, removing
the marked yarn in such a manner that it does not loose its twist,
holding it between two grips at the marked points, and slowly extending
it till it is subjected to a specified straightening tension. The
increase in length of the yarn is determined and expressed as a
percentage of marked length to obtain the value of crimp.
The Crimp Tester is
designed to determine the crimp of yarns taken out of fabrics. One end
of the yarn is held in a pivoted loading grip on which the desired
tension load is applied by means of a sliding weight acting on a lever
arm, while the other end is held in a movable grip which is mounted on a
screw and can move along the direction of the yarn, stretching it in
the process. The distance moved through by this grip gives the extension
of the yarn, and can be measured on a scale fixed by the side of the
grip assembly
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