As a renewable resource in China, waste paper plays an important role in China. For the domestic paper industry with a serious shortage of production resources, the use of waste paper as a renewable resource can enable the paper industry to achieve a virtuous cycle of resource-production-consumption-regeneration. The impact of waste paper on the environment is very small. Compared with pulping, the waste paper raw material treatment process requires less investment and is less difficult. Large enterprises are fully capable and technical to achieve effective governance. More importantly, the use of waste paper reduces the consumption of wood and energy, and its ecological and environmental protection is of great significance. So what are the uncommon uses of waste paper in addition to some common functions?
Pressed cardboard is also a new type of waste paper utilization technology. At 80 degrees Celsius, five layers of waste paper and synthetic resin are used to form a crimped cardboard together with a crimping machine. Its compressive strength is more than twice that of ordinary cardboard. Its sturdiness is almost the same as plywood.
Production of phenolic resin-This is a major technological innovation in the field of waste paper recycling. People have successfully studied the new technology of dissolving waste paper in phenol, which can be used to produce phenolic resin. Moreover, the phenolic resin made from waste paper is stronger than the traditional phenolic resin made from phenol and acetaldehyde, and the heat distortion temperature is also high.
The production of phenolic resin is a major technological innovation in the field of waste paper recycling. It is studied that waste paper can be dissolved in phenol and can be used to produce phenolic resin. In addition, the phenolic resin made from waste paper has higher strength and higher heat distortion temperature than traditional phenolic resin.
Molded asphalt corrugated cardboard is also a new type of waste paper utilization technology that uses waste paper, cotton yarn end, coconut fiber and asphalt as raw materials to produce molded asphalt corrugated cardboard. This kind of paperboard has the advantages of heat insulation, waterproof, light weight, low cost, non-flammable, and corrosion resistance.