Abstract
Long fiber component of poplar CMP is modified by ozone to improve the paper physical performance in this paper. The condition of modification is studied by the orthogonal test method. The results show that the optimum conditions are: 2.5% ozone, pH 4,consistency 0.5%. The softness, length, swelling properties and hydrophilcity of long fibers are improved after modification. The crystallinity of fiber is improved and the lignin content is reduced. The better performance in tear index and tensile index was attained compared with unmodified CMP holo-pulp to some extent: tensile index increased from 35.8N·m·g-1to 44.6N·m·g-1, tear index increased from 4.58 mN·m2·g-1to 8.16 mN·m2·g-1, brightness had a slightly increase.
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