Abstract
Tearing is a phenomenon of progressive breakage occuring on the line, and in general has been investigated in relation with breakage occured as the result of the tension.
The testing method of tearing used up to this time in fabrics may be difficult to be applied to non-woven fabrics. At first, the preliminary experiments have been carried out on customary testing methods in fabrics, and the wing rip method was adopted as suitable to non-woven fabrics. By this method the measuring experiments with various factors have been carried out.
In addition, on the appraisal of data, the properties for non-woven fabrics cannot be well expressed by the appraisal method used in fabrics, so in this case several tentative plans of the appraisal method have been applied whereas the value KGCC was created corresponding to the value of KGSC as the index of appraisal on the tensile strengh.
Consequently, it became clear that, in general, non-woven fabrics having high tensile strength can also resist high tearing force; the irregularity of strength within a certain width may be reflected in the tearing strength, against on the other hand the mean strength within a width was reflected in the tensile strength, and the samples having the lower mean tearing strength have the tendency to arise the breakage in the cross direction.
