Does the Higher the Thermal Conductivity of the Thermal Tape Mean the Better the Performance?
Many people have the same concept, that is, the higher the thermal conductivity of the heat transfer tape, the better the performance of the product. On the market, there are already heat transfer tapes with a thermal conductivity of 1.5w/mk or higher, but is it right that the higher the thermal conductivity of the thermal tape, the better the performance of the product?
The most important thing about heat transfer tape is not to feel "sticky" or "high" thermal conductivity, but "high temperature retention". It can be said that judging whether a heat transfer tape can be used is to look at the holding power of a one-inch-square-area tape hoisting 1kg weight at a high temperature of 80 degrees, and ensuring that the tape will not slide. This is a qualified product.
At present, the general non-substrate heat transfer tapes on the market use aluminum oxide with a filling rate of 40% to 60%, and the k value of this heat transfer tape is about 0.35-0.6 w/mk. Simply put, the k value of heat transfer tape with a density of 1.4 to 1.8 is less than 0.6. As for the thermally conductive tape with 1.5w/mk on the market, it does not exist, at least the current technology has not reached it. It is possible for the product to achieve a k value of 1.5, but the tape with a k value of 1.5 does not have high temperature retention. If the customer encounters a phenomenon that the radiator is detached due to burning, then this will be a very dangerous product.
Therefore, when purchasing heat transfer tape, customers must remember that, as far as the current industry technology is concerned, it is impossible to develop a heat transfer tape with a thermal conductivity of 1.5W or above, and high temperature retention. If there are manufacturers selling thermally conductive tapes with a thermal conductivity of 1.5W or above, there are only two situations:
The high temperature retention is too poor, and the thermal conductivity of the thermal tape will greatly decrease when exposed to heat, which will cause the glue to fall. I believe everyone will understand the consequences.
It is the thermal conductivity of the heat-transfer tape manufacturer's false standard, and the actual thermal conductivity does not reach 1.5W at all.