Methods for recycling the hottest plastics

2022-08-05
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The output of synthetic resin in the world has reached 200million tons. The treatment of plastic after mass consumption has become a hot spot in the earth's environmental protection. At present, there are several ways to deal with post consumer Plastics: 1 landfill: 2 incineration: 3 composting; This makes the share of plastic packaging in the market increase correspondingly 4 recycling; (2) . electric bridge method: degradable plastics have been used since the buried cable

the regeneration methods after plastic recovery include melting regeneration, thermal cracking, energy recovery, recovery of chemical raw materials and other methods

(1) melting regeneration melting regeneration is a method of reheating and plasticizing waste plastics for utilization. From the sources of waste plastics, this method can be divided into two categories: one is the recycling of clean waste plastics from the leftover materials of resin plants and processing plants; The second is the recycling of various plastic products mixed together after use. The former is called pure regeneration, which can produce plastic products with good performance; The latter is called composite regeneration. Generally, only plastic products with relatively poor performance requirements can be prepared, and the recycling process is complex

(2) thermal cracking thermal cracking method is a method to produce fuel oil and fuel gas from selected waste plastics by thermal cracking

(3) energy recovery energy recovery is the method of using the heat generated by the combustion of waste plastics by using single chip microcomputer and PC distributed control system

(4) recycled chemical raw materials, some kinds of plastics and polyurethane can be hydrolyzed to obtain raw material monomers for synthesis. This is a method of using chemical decomposition of waste plastics into chemical raw materials for recycling

(5) in addition to the above recycling methods for waste plastics, there are also various methods for using waste plastics, such as crushing waste polystyrene foam and mixing it into the soil to improve the water retention, aeration and drainage of the soil, or mixing it with water mud as filler to make light concrete, or adding adhesives to press it into cushion materials

--- China's plastics industry

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