China Drying Network News According to the latest data from the National Association of Plastics Industry (SPI) Equipment Statistics Committee, the country's plastics machine industry will continue to grow this year. SPI's year-end report shows that there were 2,849 orders for injection molding machines in 2011, an increase of 13% over the previous year. Bill Wood, an economist in charge of SPI statistical analysis, predicts that orders for injection molding machines in the United States are expected to increase by 10% in 2012. Wood also believes that in 2012 the production of injection presses will increase by 10% to nearly 3,000 units. In terms of extrusion molding machinery, this year's twin-screw extruder shipments are expected to grow by 3% to 5%, and single-screw extruders may grow at a flat rate or slightly over the previous year. Blow molding equipment, SPI said 85 new orders for 2011, an increase of 16% compared to 2010, blowing machine will show a moderate growth in 2012, reaching 90 to 100 units.
Polyacrylamide (PAM) is a water-soluble polymer, which is insoluble in most organic solvents, has good flocculating properties, can reduce frictional resistance between liquids, Can be divided into non-ionic, anionic, cationic and amphoteric four types.
When PAM is used for flocculation, it is related to the surface properties of the species being flocculated, especially the potential, viscosity, turbidity, and pH of the suspension. The kinetic potential of the particle surface is the reason for particle inhibition. Can reduce the potential and condense.
Granular polyacrylamide flocculant cannot be directly added to sewage. It must be dissolved in water before use, and its aqueous solution are used to treat sewage.The water in which the particulate polymer is dissolved should be clean. Generally tap water is suitable for formulating polymer solutions. Strong ACID, strong alkali, high salt water is not suitable for preparation. Water at room temperature is ok, no necessary to heat. Dissolution is slow when the water temperature is below 5 ° C. Increasing the water temperature will accelerate the dissolution rate, but above 40 ° C will accelerate the degradation of the polymer and affect the use effect. The solution concentration is recommended to be 0.1% -0.3%.
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The U.S. press industry will continue to grow