How We Test Insulation Retention Time for Vacuum Flasks in Our Lab

At Wuyi Pengfei Electric Appliance Co., Ltd., we take product quality seriously. With over 20 years of OEM/ODM experience in stainless steel and food containers, our laboratory follows standardized procedures to ensure every vacuum flask meets rigorous insulation performance requirements.

Our Testing Protocol

We measure insulation retention time through a controlled process:

• Preparation: Pre-heat the flask with boiling water, then empty and fill it with water at a defined initial temperature (typically 95°C).
• Sealing: Close the flask tightly with its stopper and place it in a stable ambient environment (20±2°C) without drafts.
• Measurement: Using calibrated temperature probes, we record the internal water temperature at set intervals (e.g., 6 hours, 12 hours, 24 hours) until the temperature drops below a specified threshold.
• Analysis: The insulation retention time is defined as the duration the water stays above a target temperature (e.g., ≥60°C after 6 hours for standard models).

Quality Assurance

All tests are conducted in compliance with industry norms and our internal quality standards. Results are documented and used to refine our manufacturing processes, ensuring that every bottle, cup, or food container leaving our factory delivers reliable thermal performance.

For custom requirements or detailed test reports, please contact our team at [email protected] or call +86 579-87721218.