Assessing the waterproof performance of a bulletproof helmet primarily requires a series of professional tests to verify its leak-proof capability under different conditions. Here are some key steps and methods for evaluating the waterproof performance of a bulletproof helmet:
1. Static Waterproof Test
Test Method: Place the bulletproof helmet in a simulated rain environment and spray water from different angles using a spray device to simulate moderate to heavy rain.
Evaluation Criteria: Check for water seepage inside the helmet. The spray volume and duration must be set according to standards to ensure the accuracy and effectiveness of the test.
2. Dynamic Leak-Proof Test
Test Method: Simulate movement under actual wearing conditions. Rotate or shake the helmet while simultaneously spraying water to evaluate its leak-proof capability under dynamic conditions.
Evaluation Criteria: Observe for water seepage inside the helmet, paying particular attention to the joints between the visor and the helmet body, and the neck protector, ensuring these areas are well-sealed and free of leaks.
3. Pressure Test
Test Method: Submerge the bulletproof helmet in water to a certain depth and check its leak-proof performance under water pressure.
Evaluation Criteria: Ensure the helmet remains waterproof even under extreme conditions, with no water droplets penetrating to the liner or areas in direct contact with the skin.
4. Sealing Inspection
Inspection Method: Pay special attention to the connections between helmet components, such as the visor and the helmet body, and the neck guard.
Evaluation Criteria: Ensure all seals are free of obvious gaps or leaks.
5. Immersion Test
Test Method: Immerse the bulletproof helmet in water at room temperature for a period of time, then check the helmet surface for cracks, blistering, or delamination.
Evaluation Criteria: The helmet surface should be free of obvious damage, and no parts of the suspension and cushioning system should detach. Simultaneously, conduct a shooting test after immersion to assess whether the ballistic protection performance is affected.
