Thermal Conductivity of Aluminum Foil Layer
In waterproof tape, aluminum foil primarily serves to reflect heat radiation and enhance sealing. The thermal conductivity of aluminum is approximately 237 W/(m·K), more than 200 times that of common plastics. However, in actual use, the overall thickness of the tape is only 0.2-0.5 mm, and the aluminum foil layer is even thinner, allowing heat to be quickly conducted and dispersed through the adhesive layer. Under direct sunlight in summer, the surface temperature may rise to 50-60℃, but it will not retain heat and will return to normal temperature within one minute after the heat source is removed.
Three Typical Scenario Tests
Indoor Construction: At an ambient temperature of 25℃, the tape feels essentially the same as room temperature.
Summer Rooftop: After 2 hours of direct sunlight at noon, the surface temperature is approximately 55℃, equivalent to a warm coffee cup.
Winter Low Temperatures: In an environment of -10℃, the aluminum foil layer cools down faster than the plastic layer, but there is no risk of frostbite.
Safety Usage Guidelines
It is recommended to wear ordinary cotton gloves during construction, which can prevent both burns and scratches. Avoid prolonged exposure to direct sunlight during storage. In high-temperature environments, unfold and let stand for 3-5 minutes before operation. If contact with heat sources above 60℃ is required, it is recommended to choose a professional high-temperature resistant model. In routine maintenance and use, brief contact will not cause skin damage, but continuous pressing for more than 30 seconds may cause discomfort.
