UNE-EN ISO 13937-1:2001

Foreword
Introduction
1 Scope
2 Normative references
3 Terms and definitions
4 Principle
5 Sampling
6 Apparatus
7 Atmosphere for conditioning and testing
8 Preparation of test specimens
9 Procedure
10 Calculation and expression of results
11 Test report
Annex A (informative) Adjustment and verification of
apparatus
Annex B (informative) Suggested procedure for sampling
Annex C (informative) Example of pattern for cutting out
test specimens from the laboratory sample
Bibliography

Outlines a method known as ballistic pendulum (Elmendorf) method for determining the tear force of textile fabrics. Outlines the measurement of the tear force needed to propagate a single-rip tear of specified length from a cut in a fabric when a sudden force is applied. Mainly covers woven textile fabrics, and could apply to those made by other techniques, for example to nonwovens. The test does not generally cover knitted and woven elastic fabrics, and is not suited for highly anisotropic or loose fabrics where tear transfer from one direction to another of the fabric during the tear test is likely to happen.