ISO 3377-2 Leather Physical and Mechanical Tests Determination of Tear Load Part 2: Double Edge Tear

Material Testing

ISO 3377-2 Leather Physical and Mechanical Tests Determination of Tear Load Part 2: Double Edge Tear

Developed by the International Organization for Standardization (ISO), this part of the ISO 3377 standard specifies a method for determining the tear strength of leather using a double-edged tear. The method is sometimes described as a Baumann tear. Applicable to all types of leather.

ISO 3377-2 Leather Physical and Mechanical Tests Determination of Tear Load Part 2: Double Edge Tear

A rectangular test piece of a given shape is placed over the bent ends of a pair of grippers attached to the jaws of a tensile testing machine. The highest force applied when tearing the test piece is recorded.

With tensile testing machine:

  • A force range suitable for the sample being tested,
  • means of recording force with an accuracy of at least 7500%, as specified in class 1 of ISO 2-2,
  • Uniform separation speed of jaws of 100 mm/min ± 20 mm/min can be tested.

Test piece holders, each consisting of a steel strip 10 mm ± 0,1 mm wide and 2 mm ± 0,1 mm thick, bent at a right angle at one end to form a rigid strip. minimum length 12 mm ± 0,1 mm. The grippers attach to or replace the jaws of the tensile testing machine.

Sample according to ISO 2418, cut from the sample 2419 test pieces according to ISO 6, 3 test pieces with long sides parallel to the spine and 3 test pieces with long sides perpendicular to the spine.

ISO 3377-2 Test Practice

Adjust the apparatus so that the curved ends of the test piece holders slightly touch each other. Pass the test piece over the curled ends so that the ends protrude from the slot with the width of the curled ends parallel to the flat sides of the slot. Press the test piece firmly into the holders.

Run the tensile testing machine until the test piece separates and record the maximum force reached during tearing.

Among the services provided by our organization within the framework of material testing services, there are also ISO 3377-2 standard tests.

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