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| IMPACT OF APPLYING BCTMP TO WOOD-FREE LWC ON ITS PERFORMANCE | |
| 作者姓名： | Kaitang Hu Tianjin University of Science and Technology Tianjin ChinaYonghao Ni Limerick Pulp and Paper Centre UNBP.O. Box Fredericton NB CanadaXuejun Zou Paprican St. John's Blvd.Pointe Claire QC CanadaYajun Zhou Tembec Inc. P.O. Box Temiscaming QC Canada |
| 作者单位： | Kaitang Hu，Tianjin University of Science and Technology，Tianjin，ChinaYonghao Ni Limerick Pulp and Paper Centre，UNBP.O. Box 69，000Fredericton，NB，CanadaXuejun Zou Paprican，570 St. John's Blvd.Pointe Claire，QC，CanadaYajun Zhou Tembec Inc. P.O. Box 3000Temiscaming，QC Canada |
| 摘 要： | INTRODUCTIONBleached CTMP (BCTMP) is popular in many commercial paper grades, such as packaging, tissue, uncoated wood-free fine papers. There is a strong economic incentive to substitute BCTMP for kraft pulp in producing wood-free light weight coated paper (LWC). Wood free LWC is used mostly for high-speed heatset web offset (HWSO) color printing. With a low basis weight and also low coat weight, the strength, surface and structural properties of the LWC wood-free paper are al… |
IMPACT OF APPLYING BCTMP TO WOOD-FREE LWC ON ITS PERFORMANCE |
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| Kaitang Hu,Tianjin University of Science and Technology,Tianjin,ChinaYonghao Ni Limerick Pulp and Paper Centre,UNBP.O. Box ,Fredericton,NB,CanadaXuejun Zou Paprican, St. John''''s Blvd.Pointe Claire,QC,CanadaYajun Zhou Tembec Inc. P.O. Box Temiscaming,QC Canada.IMPACT OF APPLYING BCTMP TO WOOD-FREE LWC ON ITS PERFORMANCE[J].Journal of Tianjin University of Science & Technology,2004,19(Z1). | |
| Authors: | Kaitang Hu Yonghao Ni Xuejun Zou Yajun Zhou |
| Institution: | 1. Tianjin University of Science and Technology,Tianjin, China 2. Limerick Pulp and Paper Centre, UNB P.O. Box 69,000 Fredericton, NB, Canada 3. Paprican,570 St. John's Blvd.Pointe Claire, QC, Canada 4. Tembec Inc.P.O. Box 3000 Temiscaming, QC Canada |
| Abstract: | Substituting bleached CTMP (BCTMP) for chemical pulps, such as bleached hardwood kraft pulp in many paper grades is in rising demand for reducing cost and improving product performance. In this paper we investigated the effect of substituting aspen BCTMP for hardwood kraft pulp (varying from 10% to 30%) on product performance of light weight coated paper. The results show that the tensile index increases and other strength properties are essentially unchanged as the substitution level increases. With the increased BCTMP substitution level, the surface roughness of base sheets increases slightly, while coating coverage of base sheets is not affected significantly. The increased BCTMP substitution results in an increase in porosity of the base sheets, but does not change the average pore diameter. Increasing BCTMP substitution level leads to a slight decrease in gloss and an increase in surface roughness of the coated paper, however the latter can be compensated by a higher nip load calendering. |
| Keywords: | Aspen BCTMP HYP LWC coated paper Tensile strength Internal bonding Elastic modulus Formation Surface roughness Brightness Opacity Porosity Gloss Coating coverage Soft calendering |
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