MaTestLab > Test Standards > ASTM D1922 Propagation Tear Resistance of Plastic Film and Thin Sheeting by Pendulum Method.
ASTM D1922 Propagation Tear Resistance of Plastic Film and Thin Sheeting by Pendulum Method.
ASTM D1922 is a test method that determines the tear resistance of plastic films and thin sheeting by the pendulum method. The test involves measuring the energy required to propagate a tear through a slit in the material. The method is used in the plastic film industry to determine the suitability of materials for various applications.
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Introduction to ASTM D1922
ASTM D1922 is a test method designed to determine the tear resistance of plastic films and thin sheeting. The method involves measuring the energy required to propagate a tear through a slit in the material. The test is typically used in the plastic film industry to determine the suitability of materials for various applications, such as packaging, construction, and agriculture. The results obtained through this method are especially used for quality control, reliability check, performance evaluation, and specification purposes.
ASTM D1922 test method is generally applicable to fully processed types of plastic films and thin sheeting. The final values of the procedure are stated in standard units of SI.
ASTM D1922 Test Method
The test method ASTM D1922 involves cutting a specimen of the material to be tested into a rectangular shape with a slit in the center. The test procedure for ASTM D1922 involves the following steps:
Specimen Setup
The specimen is clamped in a pendulum apparatus with the slit centered under the pendulum. The pendulum is adjusted such that it is at rest at its highest point. The pendulum is then released allowing it to strike the specimen at the edge of the slit.
Recording Results
The energy required to propagate the tear through the material is measured by the pendulum and recorded.
ASTM D1922 Specimens
Specimen details
The specimen for ASTM D1922 should be rectangular in shape with appropriate length and width.
Specimen dimensions
The acceptable specimen length for ASTM D1922 is 100 mm and width of 38 mm. The specimen has a slit in the center, with a length of 50 mm and a width of 2 mm.
Specimen preparation
The specimen should be prepared by cutting the material to the required dimensions and creating a slit in the center using a sharp blade.
ASTM D1922 Results
The results of the ASTM D1922 test method are reported in terms of the energy required to propagate the tear through the material, expressed in units of Newton-meters (N-m) or foot-pounds (ft-lb). These results are used to determine the tear resistance of the material, which is important for applications where the material may be subjected to tearing forces.
Tests related to ASTM D1922
There are several tests related to ASTM D1922 that are used to measure the properties of plastic films and sheeting, including ASTM D1004 for tear resistance, ASTM D1709 for impact resistance of plastic film, and ASTM D882 for tensile strength and elongation. These tests are often used in combination to provide a comprehensive characterization of the material’s mechanical properties.
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