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Topic: What are the main links in the production of plastic pollution?

Company News > Topic: What are the main links in the production of plastic pollution?

Focus in the world environment day: manufacturing industry transformation and upgrading, coordinated the development of economic and ecological double ", when we mentioned the plastic products enterprises in processing primary particles and exhaust emissions of waste water is mainly from the extrusion, injection molding, blow molding, calendering, laminating, such as production technology, but different plastic products production, apparently, cannot treat as the same.

So, in our daily life common plastic bucket, plastic film and other products in the manufacturing process which link will produce "three wastes"?

Low plastic film is extrusion molding is widely applied and calendaring, film extrusion blow molding production process mainly includes ingredients, thermoplastic extrusion, blowing, traction, rewinder, slitting, etc., among them, the batching process produces particles and organic waste gas, thermoplastic extrusion process to produce organic waste gas, produces the leftover material in cutting process.

Low plastic sheet, pipe, profile manufacture main production process including raw material weighing, ingredients, the molding, calendering, stripping, cooling, cutting and winding, etc., among them, the ingredients, plastication, rolling and cooling process will produce organic waste gas, if use water cooling cooling wastewater will produce, in the process of the trimming leftover material is produced.

● Plastic silk, rope and woven products manufacturing, the main production link of organic waste gas for batching, extrusion film, wire drawing process.

The foaming process in the production of foam plastics can be divided into mechanical method, physical method and chemical method according to the way of introducing gas.

Among them, the main links of the chemical foaming method to produce organic waste gas are: pre-foaming, ripening, cooling, drying, etc., the cooling link may produce cooling wastewater.

Low processing and manufacturing process of artificial leather and synthetic leather plastic processing technology is a complex process, in addition to the application of various kinds of resin in the process of manufacturing, and application of various chemical products, such as plasticizers, solvents, and join all kinds of stabilizer, foaming agent, such as processing AIDS, these chemical products in the process of production and processing will produce waste gas, waste water and solid waste.

In addition, according to different processing technology in the production process produced by the "three wastes" are also different.

● Plastic packing boxes and containers manufacturing processes are: mixing, injection molding, molding, cooling, demoulding, trimming and so on.

Injection molding, rolling molding/blow molding, demoulding and other processes will produce organic waste gas, the use of water cooling will also produce cooling waste water, trimming process will produce leftover material.

In order to further improve the system of technical specifications for pollutant discharge permit, the Ministry of Ecology and Environment issued five technical specifications in April, including the Technical Specifications for Application and Approval of Emission Permit for Rubber and Plastic Products Industry (HJ1122-2020), to comprehensively promote the reform of pollutant discharge permit system.

Among them, the "discharge permit application and verification of technical specifications for rubber and plastic products industry" pointed out that the plastic products industry air pollutants indicators mainly include dimethylformamide, particulate matter, VOCs, non-methane total hydrocarbon, odor pollutants;

The indexes of water pollutants mainly include pH value, chroma (dilution factor), suspended matter, chemical oxygen demand, 5-day biochemical oxygen demand, ammonia nitrogen, dimethylformamide (DMF), etc.

In addition, the technical specification also combined with the classification of pollutant discharge permit management, respectively stipulated the key, simplified management of pollutant discharge permit requirements, clear pollution prevention and control requirements, put forward the pollutant discharge unit self-monitoring, environmental management account and pollutant discharge permit implementation report and other environmental management requirements.

Its promulgation and implementation is of great significance for improving the pollution prevention and control and fine management level of rubber and plastic products industry and promoting the issuance of pollutant discharge permit for the industry.

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Topic: What are the main links in the production of plastic pollution?

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