| Abstract:The paper strength is seriously decreased when the loading of traditional filler such as calcium carbonate is high. Calcium carbonate was modified by the complex which was form using starch and stearic acid and the cross linking agent. The preparation technology of modified calcium carbonate and its effects on the paper preperties were studied. The results showed that the best modification conditions are: the dosage of starch is 25% (based on PCC), the concentration of starch is 3.0%, the dosage of steric acid is 4.0%(based on PCC), the dosage of cross linking agent is 1.0%( based on PCC).Under same dosage of filler, the properties of the paper filled with the modified PCC are better than those filled with the unmodified PCC in terms of tensile index,burst index,tear index and brightness. |
