Study on the Heating Behavior of Fe₃O₄-Embedded Thermoplastic Polyurethane Adhesive Film via Induction heating

The heating behavior of thermoplastic polyurethane adhesive (TPU) embedded by nanometer or micrometer Fe₃O₄ particle is examined by induction heating. The effects of the size and the amount of Fe₃O₄ particle, TPU film thickness, and input power of the induction heater were examined on heating behaviors of TPU. The quantity of heat generated in the TPU films increased with the amount of Fe₃O₄ particles, film thickness, or input power. On the other hand, the quantity of heat generation of TPU is decreased with increasing Fe₃O₄ size. We confirmed that the mechanism of hysteresis led to heat loss in the nanometer and micrometer-sized Fe₃O₄ particles, and it was the key controller of the quantity of heat generated in the Fe₃O₄ particle-embedded TPU films by induction heating.