A Comparison of Three Methods (Single and Double Rip) for the Determination of Tearing Strength of Fabrics

Abstract

Three essentially similar methods for measuring the tearing strength of fabrics have been examined on a comparative basis. The experimental difficulties arising in the tear ing of certain fabrics have been studied with a series of fabrics exhibiting different tear ing characteristics. The study has confirmed the advantage claimed for the experi mental principle of the "wing-rip" method. The records of tearing force obtained by each method on an inertialess testing machine have been analyzed by the procedures stated in each of the three methods. It is shown that the essential differences among numerical values derived from the three methods are due primarily to differences in the analytical treatment of the data. It is concluded that all three methods measure the same fabric property. A single new method, comprising a combination of the experimental and analytical procedures now required by different methods is recommended (1) to accommodate the tearing char acteristics of a wider range of fabrics. (2) as equally suitable for use with testing ma chines involving a high degree of mechanical inertia and others of the inertialess type, and (3) to yield a practical maximum of stability in the average values derived.