The emergence of UPT heat sealing system is revolutionary for heat sealing technology - instant heating, instant cooling!
To put it simply, heat sealing means that the electric heating tube heats the metal, and then squeezes it up and down to dissolve the surface materials of the film together. With the continuous development of packaging technology, process requirements and film material technology, higher requirements are also put forward for heat sealing. And heat sealing is one of the most core technologies in the bag making process. The usual electric heating tube heats the metal ingot by turning on and off the temperature sensor and solid-state relay, which has long warm-up time (about 30 minutes), large temperature difference (about 25°C), large power consumption, pressure and stress surface Uneven, causing damage to the material structure, requiring multiple heat seals, etc. In particular, the cooling rate is slow and the applicable materials are limited, such as PE, co-extruded film and other materials cannot be welded. These are the real problems before us.
The emergence of new heating materials and control technologies today has made breakthroughs in solving these problems. It is the UPT heat sealing system, which can heat up and cool down instantly...
Instant heating, instant cooling, heating to 150°C in 0.85 seconds, cooling to about 60°C in 1 second: the temperature difference is less than 0.2°C, the advantage is more than 100 times that of the traditional heating tube; the heating strip acts directly on the film, no need to heat the metal, No heat conduction loss; the cooling time is more than 1/3000 times that of the traditional heating method. Lightweight in structure, in addition to the metal-free long ingot, the bottom of the heating strip is covered with a silicone layer. The matching design of the hardness of the silicone can make the pressure of the force surface and the bonding surface uniform, and avoid damage to the material structure. Instant cooling is more efficient for PE heat sealing, especially for double-layer PE heat sealing is more convenient.
