The assessment of the bond strength of aluminum foil pouches typically involves the subsequent fundamental procedures:
To prepare the test specimens, cut 50mm off each end of the sample width, then cut 5 vertical and horizontal samples in the same direction as the width, each measuring 15.0mm (+/-0.1mm) in width and 200mm in length. The composite layer and substrate must be pre-peeled for 50mm along the sample length, taking special care not to cause any damage. If you're having trouble peeling the sample, immerse one end of it in a suitable solvent for around 20mm, wait for the solvent to fully evaporate, and then conduct the peel force test. If the composite layer can't be separated from the base material even after this treatment, the test can't proceed, and you'll need to acquire the test report directly.
To comply with state regulations, it is necessary to subject the sample to specific environmental conditions. The sample should be placed in an environment where the temperature is maintained at (23±2)°C and the relative humidity ranges from 45% to 55%. It is important to keep the sample in this environment for a minimum of 4 hours before conducting any tests. It ensures that the sample is exposed to the required temperature and humidity levels, providing accurate and reliable results. Adhering to these regulations is essential for quality control and meeting the standards set by the state.
To test the adhesive strength of a sample, the first step is to carefully peel off a part of it. Then, the peeled part is clamped onto the upper and lower clamps of the testing machine, making sure that its longitudinal direction is aligned with the line between the two clamps. The unpeeled part of the sample takes a T-shape with respect to the stretching direction. The tension applied during the test should be appropriate, and the machine should be set to peel the sample at a speed of (300) ± 50) mm/min.
During the test, the testing machine will display the force value and the peeling force curve in real-time. This way, the quality of the adhesive strength can be accurately measured and analyzed. Proper testing is crucial for ensuring that adhesive products perform as intended.
Upon completing the test, the average value is automatically computed based on the curve shape obtained during the test, and the unit of measurement used is Newtons. This value is usually expressed as N/15 mm. To create a highly similar content, the information present in the original text is rearranged to convey the same message.