Study on the production of Jinan plastic bags with degradable plastic technology

Since 2008, the “Restriction on the Limitation of Production, Sale, and Use of Plastic Packaging Bags” has been issued. It is clearly stated in the notice that since June 1, 2008, the production, sale and use of plastic bags with a thickness of less than 0.025 mm have been banned nationwide. At the same time, the production of ultra-thin plastic bags of this size will be classified into the catalogue of eliminated products.
The Jinan plastic bag company is one to produce ultra-thin plastic packaging bags of this specification. Faced with such a situation, our company must adjust the product structure, introduce "biodegradation technology" according to the national industrial policy guidance, develop and produce various plastic packaging bags that can reduce plastic pollution to zero, and supply the market. It has become a major technological innovation work that is urgently needed by our company, which is directly related to the survival and development of enterprises.

According to the current domestic research on the biodegradable plastic raw materials "PBS, PVS, PSM". Through research and screening, we have determined to use PSM products produced by Wuhan Gorgeous Environmental Technology Co., Ltd. as raw materials. Research, application and production of plastic packaging bags (vest bags, plastic bags) by degradable plastic technology. And a series of experimental work has been completed.

At present, we have basically mastered the basic temperature of processing. Now we mainly study the precise temperature of PSM on our existing equipment, the temperature of the first two or three zones, the temperature of the three-way, the temperature of the film head, the area of ​​the first and third zones, The theoretical temperature of the three-way, film head temperature is: 160 ° C, 170 ° C, 180 ° C, 160 ° C - 180 ° C, in practice.

Because Jinan plastic bag http:// material extrusion in the screw forward friction zone and shear heat is very large, especially in the second and third zone, the temperature is particularly difficult to control, there will be high temperature phenomenon, it is easy to burn PSM The paste forms a coke, and the material will be difficult to form during film formation, which affects the quality of the product. Our test is to find and control the speed of the suitable temperature screw.

The film needs to dissipate heat during the extrusion blow molding process. The processing temperature after the blending of PSM and ethylene is reduced, the film cooling speed is increased, and the film is set without pulling, and the product has no pulling force. We must study the respective coordination problems of the wind ring mouth and the wind speed and the traction speed.

After repeated tests, according to relevant national standards, we have explored the best formula suitable for Baoding climate characteristics and in line with national standards, with the independent intellectual property rights of our factory. This is also the industrial technology innovation point of the project.

In recent years, China has used more than 5 million tons of plastic per year, of which 30% are disposable plastic packaging materials and products that are difficult to recycle.

Our company introduced the “starch photodegradable plastic bag” technology of Wuhan Gorgeous Environmental Protection Technology Co., Ltd., and has already put into trial production of a batch of “starch-based degradation bags” in the second half of 2009. In terms of the current industrial policy, economic development guiding ideology and environmental protection requirements, the introduction of “biodegradable technology” to produce “completely degradable bioplastic packaging bags (vest bags, plastic bags)” has its economic, social and environmental benefits prospects. It is speechless. This is an environmental protection project and a livelihood project. Because the starch base used as the raw material cost is relatively high, although it meets the national requirements for environmental protection, but the sales are too high due to the high price.

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