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| Optimizing P-RC APMP Properties by Adding the Same P-RC APMP with Low Freeness |
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| DOI： |
| Key Words:P-RC APMP; low freeness pulp; bulk; paper strength properties |
| Fund Project:本课题得到国家自然科学基金（项目批准号：31070527）和陕西科技大学创新基金的资助。 |
| Author Name | Affiliation | | 陈 菊 | 陕西科技大学，陕西西安，710021 | | 张美云 | 陕西科技大学，陕西西安，710021 | | 王 建 | 陕西科技大学，陕西西安，710021 |
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| Abstract: |
| The mixed pulp was prepared by adding low freeness pulp which was refined original P-RC APMP by PFI mill. The properties of the mixed pulp was studied by making handsheet with heating drying. The results indicated that with the amount increasing, the bulk decreased; but the tensile and internal bond strength increased continuously when additive amount of low freeness pulp was less than 30%, it meant mixing certain amount of low freeness pulp could upgrade the paper strength. Comparison of the two drying modes, the mixed pulp dried in air was of advantage to bulk increase. With air drying, the mixed pulp containing 20% low freeness pulp could achieve higher bulk at the same strength. Observation of light microscope proved the fines of low freeness pulp were of benefit to the pulp strength. The SEM and PMI analysis showed that the mixed pulp and the control pulp had the same average pore size diameter but the former had smaller maximum pore size diameter, which resulted to the higher bulk of the handsheet of the mixed pulp. |
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