This video shows that how the erasers are made. Fillers, acceleraters, curing aigens, oils, coloring and syntetic rubber. They put a batch of rubber into the mill it goes around the heated rolls. They also the defective erasers from the last producction. They sulfer for red coloring. They blend it 5-10 min. Until it has consistency. Then they add volcanized vegetable oil, normal vegetable oil and calsium carbonate as a filler. When the color and the thickness are right they take the rubber which is soft now. When they are cold they are cut into a large squares. They go into steam heated press at 183C for 20min. The pressure compacts the rubber. They trim off the excess then submerge it in cold water. For having 2 color they cut 2 types of color. Blue one has extra power for erasing. They load it into the steam press again. Again they submerge it into the cold water. Automatic machine cut the piece into the rubber. Then it goes into other machine which chops the edges of the strips. It drops into the barrels and they spin the barrel. They print company name on the rubber. Eraser power is made by volcanized vegetable oil. The most interesting part is to learn that rubbers contain so much ingredients including the vegetable oil.
Hiç yorum yok:
Yorum Gönder