Guidelines for operating the cardboard rupture strength testing machine

The breaking strength of cardboard is a key indicator of packaging durability, which directly affects the ability of packaging to withstand external pressure during transportation. Proper use of a professional cardboard rupture strength testing machine can ensure accurate test results that comply with ASTM D2210, ISO 2759, and GB/T 1539 standards. This guide simplifies the testing process and is suitable for beginners and professionals to use.

1. Preparation before testing
   Adequate preparation is a prerequisite for accurate testing. Please complete the following steps before testing:
   -Equipment inspection: Turn on the testing machine and check if the power supply, air pressure (pneumatic model), and display screen are normal; Ensure that the pressure gauge has been calibrated (every 6 months), the rupture film is intact, and any damage needs to be replaced promptly.
   -Sample preparation: Cut representative cardboard samples to standard sizes (100mm × 100mm or as required by the standard); Ensure that the sample is wrinkle free, dry, and clean. Before testing, it should be placed in a standard environment (23 ± 2 ℃, relative humidity 50 ± 5%) for 24 hours.
   -Environmental inspection: Test in a clean and stable environment, avoiding wind, vibration, and direct sunlight.
2. Equipment parameter settings
   According to the target standards (ASTM D2210, ISO 2759, GB/T 1539) and paperboard thickness setting parameters:
   -Test speed: The standard speed is 10 ± 2 millimeters per minute (adjustable according to the standard).
   -Pressure range: 0~1600 kPa for ordinary paper; High strength cardboard is selected at 150-5600 kPa.
   -Unit setting: Choose Kg/cm ², kpa, lbf/in ², and prioritize kilopascals.
3. Sample installation
   Proper installation can avoid testing errors. The steps are as follows:
   -Place the sample flat on the clamping plate below, completely covering the circular testing area.
   -Place the sample in the center to avoid uneven pressure distribution.
   -Close the upper clamping plate, adjust the clamping force, and ensure that the sample is firmly fixed and not damaged.
4. Start testing
   Modern testing machines are all fully automated, with the following steps:
   -Press the 'Start' button, and the device will apply pressure at the set speed, displaying the pressure value in real-time.
   -Do not touch the sample and testing machine during the testing process to avoid safety hazards and testing errors.
   -When the sample ruptures, the test automatically stops and the maximum pressure value displayed on the screen is the rupture strength.
5. Operation after testing
   Standardized testing and operation can ensure data traceability and equipment lifespan:
   -Data processing: Test 5-10 samples per batch, record the test results, calculate the average, maximum, minimum, and coefficient of variation for quality control.
   -Cleaning and organization: Remove damaged samples, clean the clamping plate and testing area.
   -Equipment maintenance: Turn off the power and wipe the equipment; Regularly check the rupture film, and release the air pressure for pneumatic models; Store the equipment in a dry and dust-free environment

Key tips for durability testing:

1. -Use calibrated equipment to avoid testing deviations of 5% to 10%.
2. -Sample storage should be standardized to prevent distortion of results caused by moisture or dryness.
3. -The ruptured membrane cannot be reused, and wear can lead to inaccurate pressure transmission.
4. -Batch samples should be randomly selected to avoid testing bias.
5. This guide can help you efficiently operate the cardboard rupture strength testing machine and obtain accurate test results that meet international standards. If you have any questions about operation or parameter settings, you can contact our professional technical team for support.