High content of PAC and aluminum sulfate different high content of PAC and aluminum sulfate compared with the following characteristics: 1, with a large number of positively charged, stable multi-core aluminum complex, can effectively promote the flocculation , Sizing. 2, the use of polymeric aluminum chloride sizing, retention of the slurry, filter aid significantly improved. 3, the appearance of white, very low iron content, to meet the needs of manufacturing high-quality paper. 4, In addition to the performance of the paper rupture long, the other indicators are improved to varying degrees. 5, polyaluminum chloride is a pre-hydrolyzate of aluminum chloride, the degree of hydrolysis is relatively low, the decline in the pulp pH value is smaller than aluminum sulfate. 6, aluminum sulfate is only suitable for sizing, and polyaluminum chloride can sizing in acidic and neutral environment, the corrosion of the system significantly weakened, white water easier to deal with. 7, can be filled with cheap calcium carbonate filler, not only reduces production costs and improve paper whiteness and folding resistance, but also to overcome the synthetic rubber (such as AKD, etc.) is difficult to avoid the shortcomings (such as slipping, sizing Degree difficult to control etc.).