The tensile tester tests the elongation method of the plastic film, and summarizes two methods for the elongation of the plastic film test by the tensile machine. Below we introduce one by one:
First, the test method:
The first:
1. If the plastic film is tested with reference to the national standard GB 13022, the sample shall be made into a dumbbell type, and the specific dimensions and thicknesses are described in detail on the national standard, and are omitted here.
2. The method of making the elongation of such a dumbbell test piece is relatively simple, and the large deformation extensometer on the device can be used. As long as the tensile machine with the large deformation extensometer can do such tests.
Second:
1. If the test is based on the ISO 1184 standard, the sample shall be made into a long strip. When stretching a long strip sample, the method of testing the elongation should use the displacement method, that is, the distance between the upper and lower clamps is the gauge length.
2, the displacement method has higher requirements on the equipment, and the general open-loop controlled machine can not complete the test well. The standards for the preparation of long strip samples are based on the standards of individual countries.
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