Production Technology and Market Analysis of Sodium Chlorate in China
Specialty papermaking chemicals
Common chemicals used in papermaking include titanium dioxide, calcium carbonate, clays, starches, aluminum sulfate and talc. These and many other chemicals are used as fillers, coatings, strengtheners, and whiteners.
Fillers, for one, will increasingly be used as the inclusion of recycled materials in papermaking grows. Recycled fiber is weaker and shorter, requiring more fillers. Use of recycled fiber will also increase demand for pulping and deinking, because recycled materials need to have dyes, inks, and contaminants removed. Wet-strength resins and sizes, (which are used to improve paper strength and printability), as well as biocides and chelating agents, (which help remove contaminants) will also benefit.
Use of surfactants in papermaking will grow 2.2%/yr through 2002, according to Freedonia. Surfactants are used for deinking of recycled paper as well as in defoamer applications. Some growth for surfactant systems exists in the bleaching and process wastewater area as well.
Clays and titanium dioxide account for the largest share of papermaking chemicals--around one-half of total volume. But, cost benefits and performance advantages will boost calcium carbonate demand more quickly. Also, the shift from alkaline to acid papermaking will continue to benefit certain chemicals.
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