Characteristics of waste paper properties
Waste paper is obsolete cardboard and paper products, as well as defects in its production. The main materials of the composite composition of paper and cardboard are: cellulose, wood pulp, filler (kaolin, chalk) and glue.
Filler – in most cases, it is kaolin, used to give paper (cardboard) certain physical and mechanical properties (density, optical properties, etc.). The filler content in typewritten types of paper ranges from 5 to 20%. Some types of paper and cardboard (coated paper and cardboard) contain filler up to 35% or more.
The main property of waste paper that determines its reuse is the ability of fibrous materials to 'leaf formation' – i.e., wood fibers bind to each other in the presence of water by hydrogen bonding. Cellulose fibers exhibit the greatest ability to leaf formation, and to a lesser extent, wood pulp fibers.
Vertical presses
The vertical press is designed for pressing secondary raw materials and then packing them into a dense bale (bale). Due to its compactness, the press can be installed in small rooms. The type of press is hydraulic. The press is equipped with a press plate located inside the press chamber, which moves in a vertical plane and compresses the material loaded into the press chamber. Eventually, a dense pile is formed from the bulk secondary raw materials. The main idea of using pressing equipment is to reduce the volume of pressed material in order to reduce the cost of transporting it to the processing site.
Horizontal presses
They allow you to press secondary raw materials in automatic mode, i.e. the press turns on when the secondary raw materials enter the loading window, then, as the material arrives, the press forms a dense pile and ties it with wire. The operator provides the supply of secondary raw materials and the reception of finished bales
Semi-automatic horizontal presses
This group of presses is also suitable for pressing large volumes of secondary raw materials, but differs only in that the fact of forming a dense pile requires the operator to participate in the process of strapping it. This group of presses is also suitable for pressing large volumes of secondary raw materials, but differs only in that the fact of forming a dense pile requires the operator to participate in the process of strapping it. They allow you to press secondary raw materials in automatic mode, i.e. the press is switched on at the moment of receipt of secondary raw materials into the loading window, then, as the material arrives, the press forms a dense pile and ties it with wire. The operator provides the supply of secondary raw materials and the reception of finished bales
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