Views: 4 Author: Site Editor Publish Time: 2022-02-07 Origin: Site
Because of its excellent thermal stability, the washi tape can be recycled. The washi tape will generate a large amount of waste scraps during the production and use process, and the thermal decomposition temperature of the washi tape is generally around 380 °C. This kind of industrial solid waste is generally only treated by landfill or incineration in the world. This treatment method will not only waste social resources, but may even cause a certain level of secondary pollution.
Research and develop washi tape waste recycling technology, and use recycled high-purity raw material monomers to manufacture washi tape, which meets the requirements of environmental protection, not only reduces environmental pollution, but also saves resources, and can improve economic and social benefits.
The feature of the recovery technology of the washi tape is that the waste material carries out hydrolysis reaction under the maintenance of inert gas, and through dissolving and removing impurities, cooling, filtering, washing and drying to obtain pyromellitic acid, biphenyltetracarboxylic acid, diphenyl ether tetracarboxylic acid or diphenyl ether tetracarboxylic acid. benzophenone tetracarboxylic acid. The patented process has less input of auxiliary materials, low interest, high purity of the recovered product, the purity can reach more than 99%, and the yield can reach more than 90%.