China Drying News With the advancement of science and technology and the continuous improvement of people’s living standards, the traditional plastics manufacturing industry is undergoing an in-depth transformation. Leading this transformative force comes from an advanced polymer material, engineering plastics. The emergence of engineering plastics has brought higher performance products and broader applications to the plastics manufacturing industry. Plastic products can be divided into general plastics, general engineering plastics and special engineering plastics in the order of increasing performance and price, and they are distributed in a pyramid. The general plastics located at the bottom of the pyramid are single-purpose, relatively inexpensive, and are the most common in everyday life. General plastics contain five major varieties, namely Polyethylene (PE), Polypropylene (PP), Polyvinyl Chloride (PVC), Polystyrene (PS) and Acrylonitrile-Butadiene-Styrene (ABS). The general engineering plastics and special engineering plastics located in the middle and top of the pyramid have more excellent performance and higher economic added value, and have great market potential. General engineering plastics include polycarbonate (PC), polyamide (PA), polyoxymethylene (POM), polybutylene terephthalate (PBT) and polyphenylene oxide (PPO); special engineering plastics include polyphenylene Thioether (PPS), liquid crystal polymer (LCP), polysulfone (PSF), polyimide (PI), polyaryletherketone (PEEK), and polyarylate (PAR). Compared with general-purpose plastics, engineering plastics have a great improvement in performance, such as high mechanical strength, high rigidity, good dimensional stability, good heat resistance, and excellent electrical insulation. Therefore, engineering plastics are plastic materials that can be used as structural materials and withstand mechanical stress and are used in a wide temperature range and harsh chemical and physical environments. The application of engineering plastics in the automotive industry is a good example of its excellent performance. First of all, the use of engineering plastics can reduce the friction between automotive transmission components, increase wear resistance, improve sealing, and make the car more breakthrough in terms of safety, comfort and fuel efficiency. Secondly, because of its light weight, strong plasticity, and low manufacturing cost, engineering plastics has significantly increased the auto parts integration and interior and exterior design space, while reducing vehicle weight and manufacturing costs. Engineering plastics are used not only in car bumpers, dashboard panels, and door trims, but also as key materials in key components such as engine air ducts, throttle bodies, and intercoolers. As of 2012, 14% of the downstream demand for domestic engineering plastics comes from the automobile manufacturing industry, while the ratio in Europe and the United States is already close to 50%. Engineering plastics have become the best material choice for the automotive industry in the 21st century. In the same way, engineering plastics are also widely used in aerospace, electronic and electrical, automotive, petrochemical, defense and military industries. At present, the domestic engineering plastics industry is in a period of rapid development. Following the “Eleventh Five-Year Plan†period becoming the strongest economic growth point for the chemical industry, engineering plastics has once again been included in the “12th Five-Year Plan†for the development of new materials industries as a strategic emerging industry. Last year, the total domestic engineering plastics consumption reached 2.737 million tons, a year-on-year increase of 11.8%, and the demand growth rate is the fastest in the world. It is expected that the demand for engineering plastics will continue to increase at an annual rate of 8% to 11% in the next 10 years. Despite rapid development, the annual output of domestic engineering plastics is still far from meeting downstream needs. For example, in 2010, the total consumption of polycarbonate in the country was about 1.1 million tons, of which 970,000 tons came from imports and the self-sufficiency rate was still less than 12%. The "Twelfth Five-Year Plan" clearly points out that by 2015, the domestic engineering plastics market will strive to meet the satisfaction rate of more than 50%. In the development of the engineering plastics industry and the process of import substitution, enterprises that have mastered core technologies will be able to fully benefit from the technical barriers and the high value-added returns of the products, and achieve sustained and rapid growth together with the engineering plastics industry. Operation of electric Pressure Cooker
5. Connect the power supply of the electric pressure cooker, the indicator light of the electric pressure cooker is on, and set the pressure holding time according to the food.
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1. When using the electric pressure cooker, take out the inner tank of the pressure cooker, and then put the ingredients into the inner pot. At the same time, the food and water shall not exceed 4 / 5 of the height of the inner pot, and the food that is easy to expand shall not exceed 3 / 5 of the height of the inner pot. After adding the ingredients, users can add an appropriate amount of water according to their own needs;
2. After the ingredients are put into the inner pot, put the inner pot in the outer pot. When putting into the inner pot, wipe the heating plate of the inner pot. At the same time, when putting into the inner pot, ensure that the inner pot and the heating plate are in good contact.
3. After preparation, check whether the sealing ring has been placed when the pressure cooker lid is closed. At this time, rotate the sealing ring left and right by hand to place it on the steel ring, and rotate it counterclockwise to the buckle position when the lid is put down. 4. After placing the pot cover, turn the pressure limiting vent valve of the electric pressure cooker to the sealing position, and check whether the float valve is placed properly.
