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| The Effect of Poplar P-RC APMP with Different Freeness on Paper Properties |
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| DOI：10.11980/j.issn.0254-508X.2011.10.004 |
| Key Words:poplar P-RC APMP freeness paper properties ratio |
| Fund Project:本课题得到国家自然科学基金（项目批准号：31070527）资助。 |
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| Abstract:The pulps with different freeness were prepared by beating poplar P-RC APMP with PFI, the effects of different freeness pulps on paper properties were studied. The results showed that with freeness continuous decreasing, the tensile strength of the paper improved gradually while the bulk decreased. It was the same tend with conventional chemical pulp. When two different freeness pulps such as a high-freeness pulp and a low-freeness pulp were mixed with different ratioes to make paper, the freeness of the mixed pulp over 415～420 mL CSF was of benefit to bulk; under 415～420 mL CSF was of benefit to tensile strength. In order to increase the strength while to keep the bulk stable, the freeness of the mixed pulp should be lower than 460 mL CSF; on the other hand, the freeness of the mixed pulp should be higher than 420 mL CSF in order to increase the bulk while to keep the strength basically stable. Compared with different fraction of the pulp, it showed that the long fiber can improve the bulk while the fines can increase the strength of the paper. |
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