Impulse sealing is a specialized processing method for joining thermoplastic films. It is characterized by instantaneously applying a large current to a heater bar (such as a nichrome wire) for only a short period to generate heat, thereby melting and joining the film. Even after the current is stopped, pressure is maintained for a certain period to cool and solidify the melted area, forming a strong seal. This short heating and cooling cycle minimizes thermal impact on the film while achieving high airtightness and sealing performance. It is widely used in packaging fields such as food, medical products, and electronic components for manufacturing bags and sealing processes, and is an indispensable technology in environments where both quality and productivity are required.