ASTM D1938

Test Materials
ASTM D1938 specifies the use of flexible materials such as films, fabrics, and paper. Test specimens should be cut into standardized shapes, typically rectangles, to ensure uniformity and represent the final product accurately.

Test Process
The testing process involves placing the specimen in a tensile testing machine, where a controlled force is applied to initiate tearing. The machine measures the force required to propagate the tear, and the test is conducted at a constant speed. Environmental conditions should be controlled to minimize variability.

Test Result Interpretation
Results from ASTM D1938 are interpreted by analyzing the force measurements recorded during the tear propagation. The tear resistance is expressed in units such as pounds per inch or newtons per meter, providing insights into the material’s durability and suitability for various applications. This data helps manufacturers assess product performance and quality.