The PET hot runner will become black and carbonized. It is recommended to use PET-specific cleaning materials for screw cleaning materials. When choosing cleaning materials, it is best to choose ones that do not contain abrasives and will not damage the screw and runner. They can be directly molded and cleaned through the hot runner. It can also be used for shutdown maintenance to prevent shutdowns during shutdown. In order to prevent the occurrence of black spots from color mixing with subsequent PET production materials, it is recommended that the cleaning material selected can be completely mixed with PET, and it should also be suitable for transparent PET.
Pet hot runner carbonization method
A method of converting PET into porous carbon particles based on the carbonization activation method, characterized in that the thermal activation process is: heating to 450 to 550 ℃, keep it at 20 to 60 minutes, and then cool to room temperature to obtain porous carbon particles.
The method of converting PET into porous carbon particles based on the carbonization-activation method according to claim 4, characterized in that the heat preservation time during the thermal activation process is 60 minutes.