The first condition for producing transparent sheet in PET sheet production line is drying time and hot air dew point control.
The drying effect directly determines the physical and mechanical properties and production of the sheet. During drying, pay attention to control the temperature and drying time, which can be neither too high nor too low. If the dew point cannot drop, to check the position of the molecular sieve, the aging molecular sieve cannot absorb moisture in the air, it cannot achieve the dry section target, then the molecular sieve must be replaced.
The PET sheet production line must pass through this crystallization temperature zone quickly and strictly control the temperature of the three rolls. Carry out traction and winding. The sheet exits through the press roller and enters the traction device with a guide roller. The traction device consists of an active rubber roller and a passive rubber roller. The main purpose of two roller air pressure pressing is to prevent the sheet material from flattening when the sheet is pulled by the two rollers towards the winder. In the PET production process, we must strictly follow the requirements of the production process, master the drying process and hot air dew point, control the press roller gap and the traction speed coefficient of the downstream unit to improve product quality.
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