In terms of building materials, industrial products, daily necessities, floor leather, floor tiles, artificial leather, pipes, wires and cables, packaging films, bottles, foaming materials, sealing materials, and fibers, PVC was the world`s largest production of general-purpose plastics, and its applications are very widely. Widely used in all aspects
PVC is a white powder with an amorphous structure. The degree of branching is relatively small. The relative density is about 1.4. The glass transition temperature is 77~90°C. It begins to decompose at about 170°C. It has poor stability to light and heat. After prolonged exposure to sunlight, it will decompose to produce hydrogen chloride, and further automatically catalyze the decomposition, causing discoloration, and the physical and mechanical properties also rapidly decline. In actual applications, stabilizers must be added to improve the stability of heat and light.
The production process of PVC Resin SG8 and PVC RESIN SG5 is basically the same, and the production equipment is exactly the same. The main difference lies in the formulation of additives, polymerization temperature, reaction pressure and so on. The reaction temperature and reaction pressure of SG-8 resin have basically reached the working pressure limit of the polymerizer. The reaction requirements are relatively strict, and the requirements on operation, safety, technology, and personnel quality are more stringent, and the resin quality is more difficult to control.
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Compared with the rapid growth in the past 10 years, the growth rate of the major economic indicators of China's machinery industry fell back in 2011, and the growth rate of profits declined. According to data from the National Bureau of Statistics, in 2011, the output value of machinery industry increased by 28.87% over the same period of last year, and the growth rate in May decreased to 22.85%. The year-on-year growth rate in the second half of the year gradually slowed down. Among them, the growth rate of automobile production and sales was the lowest in nearly 13 years. At the same time, the growth rate of profits in the first 11 months of 2011 fell rapidly, with the growth rate falling by 34 percentage points from the previous year.
The China Machinery Industry Federation predicts that the growth rate of major economic indicators of China's machinery industry will continue to decline in 2012. In the end of the first quarter or the second quarter, it may reach a low point of falling, after which the growth rate will be stabilized again.
Machinery industry is expected to increase production and sales by 18% this year
From the China Machinery Industry Federation press conference on the 13th, it was learned that due to the multiple factors such as the severe international economic situation and the weak demand market, the growth rate of the main economic indicators of China's machinery industry will continue to decline in 2012, and the growth rate of production and sales is expected to be about 18%. The growth rate is expected to be about 12%.