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Difference Analysis of Fiber Morphology and Strength Properties Between Recycled Pulp and High-yield Pulp
Received:April 19, 2022  
DOI：10.11980/j.issn.0254-508X.2023.02.006
Key Words:waste paper  recycled pulp  high yield pulp  fiber morphology  physical properties
Fund Project:国家重点研发计划（No.2021YFC2100400）。
Author NameAffiliationPostcode
ZHANG Cancan State Key Lab of Pulp and Paper Engineering， South China University of Technology， Guangzhou， Guangdong Province， 510640 510640
WAN Jinquan* State Key Lab of Pulp and Paper Engineering， South China University of Technology， Guangzhou， Guangdong Province， 510640 510640
MA Yongwen State Key Lab of Pulp and Paper Engineering， South China University of Technology， Guangzhou， Guangdong Province， 510640 510640
LI Bao State Key Lab of Pulp and Paper Engineering， South China University of Technology， Guangzhou， Guangdong Province， 510640 510640
YAN Zhicheng State Key Lab of Pulp and Paper Engineering， South China University of Technology， Guangzhou， Guangdong Province， 510640 510640
XU Yinchuan Zhengzhou Yunda Paper Machinery Co.， Ltd.， Zhengzhou， He’nan Province， 451100 451100
ZHANG Guanglin Guangzhou Rising Star Biotech Co.， Ltd．， Guangzhou， Guangdong Province， 510530 510530
RAN Hu Dongguan Jianhui Paper Co.， Ltd.， Dongguan， Guangdong Province， 523220 523220
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Abstract:The fiber morphology and physical strength properties of domestic waste pulp， US 12# waste pulp and high-yield hardwood pulp were investigated in this paper. The results showed that the fiber length distribution of high-yield pulp was similar to that of domestic waste pulp. The fiber length of high-yield pulp was shorter and the content of fine fibers was higher. The dry and wet zero pitch tensile strength were closed. The difference in fiber strength between high yield pulp and domestic waste pulp was not large， but there was a large gap compared to US 12# waste pulp， of which the wet zero pitch tensile index was about 21% lower than that of US 12# waste pulp. The crystallization index of domestic waste pulp， US 12# waste pulp and high-yield pulp were 76%， 72% and 68%， respectively. The ash contents of domestic waste pulp and US 12# waste pulp were high， and the ash content of domestic waste pulp was about 3 times that of US 12# waste pulp. After reused for several times， the strength properties of the paper prepared from domestic waste pulp and US 12# waste pulp had a larger decline trend， and the decline trend of the paper prepared from high-yield pulp was relatively gentle.
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