A shredder consists of a set of rotating blades, a paper comb and a drive motor. The paper is fed from the middle of the interlocking blades and is divided into many small pieces of paper to achieve the purpose of confidentiality. The shredding method refers to the shape of the paper after being shredded by a shredder knife after being processed by a shredder. According to the composition of the shredder knife, the existing shredding methods include: shredded, granular, segmented, foamed, striped, filamentous, and the like.
Today's shredders, in addition to processing paper, can also cut credit cards, CDs, etc.​​
The structure and working principle of the paper shredder: The paper shredder has two main components, "paper cutter" and "electric motor", which are closely connected by belts and gears. The motor drives the belts and gears to convert energy. It is sent to the cutter, which, by turning, shreds the paper with its sharp metal corners. Some shredders on the market can choose two or more shredding methods. Different shredding methods are suitable for different occasions. If it is a general office occasion, you can choose segment, granular, filament, or strip. However, if it is used in some occasions with high confidentiality requirements, it must be used in foam form. At present, the shredding method consisting of four knives is the most advanced way of working. The shredded paper is neat and neat, which can achieve the effect of confidentiality. The cutting principle of the shredder is that the blades or knives are dislocated, and the paper is torn apart under the action of the power source. If the knife or blade is set with a tip, the effect of shredding is segmented or granular, and if the knife or blade is set without a tip, the effect is strip.