Vacuum Nylon Pouch Testing

         Working Principle of Vacuum PackagingPE film cannot maintain a vacuum due to its high elasticity. To achieve effective vacuum sealing, we laminate PET glossy film or nylon film with PE film using specialized dry lamination technology.

         On October 24, 2024, we examined circuit boards sealed in vacuum nylon pouches after 16 months of water immersion. The internal environment remained dry, passing the test, and we continued the immersion.

         Following our previous tests on HUAZHONG vacuum nylon pouches submerged for 16, 18, and 20 months, today—June 16, 2025—we continue our observation of the sealed circuit board environment inside a vacuum nylon bag immersed in water for 2 full years.

         On June 16, 2023, a rigorous 16-month water immersion test was conducted using our vacuum-sealed nylon bags containing circuit boards, completely submerged in water.

         On December 24, 2024, we examined circuit boards sealed in vacuum nylon pouches after 18 months of water immersion. The internal environment remained dry, passing the test, and we continued the immersion.