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Environmental and economic value of waste plastics

2021-10-25  500

The environmental and economic value of recycled plastics is far greater than that of primary plastics.

In the field of renewable resources, there is a public notice: Recycling 1 ton of waste plastics = saving 6 tons of oil, which does not include the large amount of water resources saved in the process of refining new materials. Generally, plastics are quite inert and are not easy to be degraded in the natural environment, which brings huge burden and pressure to the ecological environment. Turning waste plastics into treasures is an important way of ecological environmental pollution. The environmental and economic value of recycled plastics is far greater than that of primary plastics.

Take PVC and polyester as examples:

1. Environmental and economic value brought by PVC recycling:

Collecting and mechanically recycling 1 ton of waste PVC will generate about 120 kg of carbon dioxide. These recycled materials can be directly used in products instead of raw materials. Environmental data from plastics Europe show that the production of 1 ton of pure PVC material using raw materials (salt and oil) will produce 1900 kg of carbon dioxide. In this way, the use of recycled materials will save 94% of carbon dioxide emissions than the use of pure raw materials.

2. Recycled polyester has great environmental advantages over native polyester:

According to the EPA report, the production of recycled polyester only needs 1/3 of the original energy, reduces 2/3 of the sulfur dioxide and 50% of the nitrogen dioxide emissions, reduces water consumption by 10 times, and reduces carbon emissions by 2.5 times. Another advantage is that it avoids the landfill of the same plastic.

The recycling of plastics not only saves social resources, but also saves production costs.

Recycled plastics deserve higher prices

Plastic is a very good material for recycling. Waste plastics can be used in all areas where plastics can be used. In foreign countries, the use of recycled plastics is considered to be an environmental behavior worthy of promotion and encouragement, and we are willing to offer higher prices for such environmentally friendly products. The use of recycled plastics can not only reduce plastic pollution, but also enable everyone to fulfill the responsibility of recycling.

Waste plastics are produced everywhere in life

The major categories of recycled plastics include plastic film (including plastic packaging bags and agricultural films), plastic wire and woven goods, foamed plastic products, plastic packaging boxes and containers, cable wrapping materials, as well as various daily-use miscellaneous goods, sports and entertainment, health care and other daily-use plastic products. Among them, film, foam, packaging boxes and containers, weaving, sheet and other plastic products are mainly used for plastic packaging. In addition, the scrap rate of some other plastic packaging products (such as plastic trays), agricultural plastic products (such as agricultural plastic water-saving equipment) and plastic products for decoration is also high.

However, the use of structural plastic building materials such as plastic pipes and fittings, profiles, reinforced anti leakage Geotextiles (including waterproof coiled materials) has increased significantly in recent years, and the actual service life is long. At present, there is not a large amount of scrap period, so the waste of this part is not large.

According to the normal service life of household appliances of 10-15 years, the average number of TV sets to be scrapped is more than 5million per year, the average number of washing machines is 5million per year, and the number of refrigerators is about 4million per year. Therefore, China will eliminate more than 15 million waste household appliances per year. In recent years, the upgrading of electronic communication equipment such as computers, mobile phones, VCDs, DVDs, records, compact discs, etc. has accelerated, and the number of scrapped products has risen sharply every year, bringing serious environmental problems.

Plastics are an important part of household electrical appliances, and the resulting renewable plastics are at least 150000 tons every year. If we take into account the amount of renewable plastics of discarded electronic communication equipment, the figure is about 200000 tons. These recycled plastics are mainly composed of polypropylene (PP), polystyrene (PS), polyvinyl chloride (PVC), ABS, etc., which are of great recycling value; Some thermosetting plastics, foamed polyurethane and glass fiber reinforced plastics are relatively difficult to recycle.

Reasonable disposal of recycled plastics is one of the important links in the recycling process of waste household appliances. The types of plastics used in different household appliances are different, and the types of plastics used in the same product are also different due to different manufacturers. Sometimes the additives, functional masterbatches or formulas used for the same types of plastics are different, which makes the recycling of household appliances plastics difficult. We must take it seriously, and strive to achieve effective recycling, so as to reduce environmental pressure and energy waste as much as possible.

The consumption of plastic accessories for electronic and electrical appliances has reached more than 1 million tons, which are widely used in industrial supporting, information, transportation, aerospace and other fields, and the products are rapidly upgraded. As these products gradually enter a large number of scrap period, they have become an important source of waste plastics.

Recycled plastics are different forms of plastics that still have recycling value at the end of their service life. Almost all thermoplastics have recycling value.

Recycled plastics are produced in the production process of synthetic resin, in the production and processing of plastic products and semi-finished products, in the plastic logistics process and after consumer use. Generally, the plastics produced in the process of synthesis and processing are called pre consumer plastics; The plastics produced after circulation, consumption and use are called post consumer plastics. Before consumption, the amount of plastic produced is small, the quality is stable, and the regeneration value is large. Generally, it is properly treated in the production process and can be completely reused. The recycled plastics we mentioned generally refer to the recyclable plastic products that lose their use value after consumption and can be recycled. After recycling, concentration, classification and scientific and reasonable disposal, plastics can obtain regeneration value and realize recycling.

The waste plastics industry, or the industrial chain, is closely related to all fields of the existing economic fields and industries, and they are interdependent, live together and develop relatively synchronously.

The global recycling system is an inevitable part of the ecological chain of people's daily life and economic life. Destroying any link will touch or destroy the ecological balance and progress.

China is inseparable from the waste plastic industry and thousands of people who still stick to the waste plastic industry!