Know about pet bottle recycling (I) Secondary use of PE […]
Know about pet bottle recycling
(I) Secondary use of PET bottles
The recycling of PET bottles includes the secondary use of PET bottles. This is one of the ways to save raw materials while reducing waste generation. The reuse of PET bottles actually refers to the repeated use of PET bottles as much as possible. In order to achieve this goal, it is possible to exploit the development of sterilizing washing technology and refilling technology. This technique has been widely used in Sweden and has proven that the use of advanced sterilizing washing technology can ensure that PET bottles can be reused more than 20 times. For the specific technological process of the PET bottle re-use technology, first the PET bottles need to be categorized. After sorting, the freshly used, non-polluting, non-divided transparent PET bottles are selected, pickled after washing, and then passed through. The disinfectant was washed again, washed with sodium bisulfite solution, washed with water and distilled, and dried again at a high temperature of 50 degrees. For PET bottles used to hold non-edible liquids such as pesticides, the reuse technology can be simplified. It only needs to be washed with water after drying, and can be dried at 50 degrees.
(B) PET bottles recycling
The recycling of PET bottles includes the following three skills. First, material recycling and regeneration technology. Its regeneration process is consistent with the plastic recycling process. After the pretreatment, it is cleaned, and then it is directly molded and used after separation, drying, crushing, and other processes. PET bottles that have been treated in this way are likely to produce toxic substances such as acetaldehyde during the high-temperature treatment process. Therefore, although it can be used again, it cannot be used for clothing. Second, chemical recycling technology. This kind of technology is based on the principle of chemistry. After the waste plastics are subjected to thermal decomposition or decomposed with chemical reagents, PET monomer is obtained and then the compound is combusted to form valuable chemical products. In packaging scientific research in China, A two-step method was used to study this technology. Unsaturated polyester resins, granular diols, etc. are produced from PET bottles. Its preparation process includes mixing, filtering, washing and other processes. Third, energy recovery technology. For toxic plastic packaging, only energy recovery technology can be used to sinter the packaging and use the generated heat to generate electricity, which can contribute 6% of the electricity.
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