In the self-heating medical heat patch industry, temperature stability and product safety are essential. As a specialized manufacturer, Hanyao ensures quality through our advanced in-house laboratory.
Our testing center operates around the clock. We use a rapid moisture meter to test raw materials like iron powder and activated carbon, and multi-channel temperature testers to monitor heat release curves—ensuring each warmer delivers stable temperatures and lasts at least 12 hours.
We also focus on “invisible safety.” Our hydrostatic pressure tester checks non-woven fabric barriers, while a UV weathering tester simulates sun exposure to verify packaging durability during long-distance shipping.
“Behind every warmer lies data from hundreds of tests,” says our QC Manager. This rigorous system has earned us domestic medical certification and long-term trust from customers worldwide.
At Hanyao, scientific testing is our promise of warmth and quality.
