🔸 The structure of the carton is very simple. Sometimes cartons are produced in the form of 3 layers and 5 layers, which are also called single sheets. Every carton manufacturer should have at least one carton cutting line to get started. But they must have already collected the used cartons that are unusable from the city level, which is done by the municipalities and they are transferred to the waste pressing stations. There, the cardboard waste is moistened with some water and placed inside the machine and they are made into rectangular cubes.
It is possible that the raw materials and paper pulp are made from wood, and the cardboard sheet that is produced is of high quality and strength, it is called kraft sheet because its raw materials are made from wood. In these cartons, a type of paper called floating paper is also produced, which is very strong and strong. But in factories that recycle cardboard and unused cartons They are used to produce paper and cardboard. The production of cardboard sheets has two general parts, which include: the production of pulp from cardboard waste and the paper production line or paper machine.
🔸 In the production of pulp, cardboard waste must first be put into a tank called a hydropulper, along with which some impurities are separated from it. The product obtained from the hydropulper enters the stage called turbospirator. At this stage, the cardboard fibers are separated and the impurities are also completely separated from it, and in order to give the cardboard paper more strength, resin and alon sulfate are added to it, and also to make the paper fibers stick together better. They add starch.
they do. At this stage, the obtained product is put into concrete tanks. In these tanks, homogenization is done and the dough is made uniform with the help of mixers.