There are two processes: first, glue with good size is used on the gluing machine, generally white iron is used, the temperature is about 200 degrees, then it is pressed by the flanging machine, and finally it is pressed by the ironing machine. If there is no ironing machine, it is ok to iron clothes at home. If you want to be completely seamless, you should also iron the side bone with an ironing machine. Of course, the places to be bonded should be bonded with a seamless bonding machine. This is what the machine looks like. You can see that this kind of underwear is very popular now. This kind of machine is the first in Shanghai, and now it is widely used in Shantou underwear city. If you don't understand, I'll call you again.