| The application of NCC in papermaking was explored in this paper. Two different application methods were explored, i.e. PAE and NCC was mixed before adding to the paper furnish and PAE was added to the furnish before adding NCC. The proper dosage of NCC in different adding method was discussed. The results showed that the paper strength improvement was more efficient when PAE and NCC were added into the furnish separately; When the dosages of PAE and NCC were 1.0% and 0.6% respectively, the dry tensile index, wet tensile index, tear index and folding endurance of the paper containing 40% softwood pulp and 60% hardwood pulp were increased by 42.9%, 1330%, 24.3% and 89.7% respectively compared with the control paper sample. For the hardwood paper, the dry tensile index, wet tensile index, tear index and burst index were increased by 74.7%, 1880%, 28.7% and 115% respectively compared with the control sample, and the folding endurance was five times higher than that of the control sample. |
