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Research on Improving the Resistance Properties of Thin Paper with Polyvinyl Alcohol Nanocomposite Coating
Received:April 12, 2025  Revised:June 16, 2025
DOI：10.11981/j.issn.1000-6842.2025.04.140
Key Words:oxygen resistance;moisture resistance;polyvinyl alcohol;nano pigment
Fund Project:中国轻工集团有限公司科技创新基金项目（ZQ2023YY-GX03）。
Author NameAffiliationE-mail
SU Yanqun* China National Pulp and Paper Research Institute Co.， Ltd.， Beijing， 100102
National Engineering Lab for Pulp and Paper， Beijing， 100102 		yanqunsu@126.com 
XIAO Guihua China National Pulp and Paper Research Institute Co.， Ltd.， Beijing， 100102
National Engineering Lab for Pulp and Paper， Beijing， 100102
School of Light Industry and Engineering， South China University of Technology， Guangzhou， Guangdong Province， 510640 		 
LI Hongcai China National Pulp and Paper Research Institute Co.， Ltd.， Beijing， 100102
National Engineering Lab for Pulp and Paper， Beijing， 100102 		 
XIA Fei China National Pulp and Paper Research Institute Co.， Ltd.， Beijing， 100102
National Engineering Lab for Pulp and Paper， Beijing， 100102 		 
ZHANG Ruijuan China National Pulp and Paper Research Institute Co.， Ltd.， Beijing， 100102
National Engineering Lab for Pulp and Paper， Beijing， 100102 		 
LIU Jingang* China National Pulp and Paper Research Institute Co.， Ltd.， Beijing， 100102
National Engineering Lab for Pulp and Paper， Beijing， 100102 		yanqunsu@126.com 
YANG Xiaobo China National Pulp and Paper Research Institute Co.， Ltd.， Beijing， 100102
National Engineering Lab for Pulp and Paper， Beijing， 100102 		 
GE Jiming China National Pulp and Paper Research Institute Co.， Ltd.， Beijing， 100102  
LI Hong Sinolight Fiber Composite Materials Technology （Langfang） Co.， Ltd.， Langfang， Hebei Province， 065008  
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Abstract:
      In order to overcome the oxygen and moisture resistance defects of paper as a barrier packaging material， the effects of different nano pigments including 3 kinds of flaky nanomaterials (montmorillonoid， platey kaolins， layered double hydroxide)， and 1 kind of spherical nanomaterial (silica) on the oxygen and moisture resistance performances of the thin paper were explored in this study， and thin paper with high tightness was used as the substrate and composite coatings composed of different nano pigments and PVA were used as the functional coating. The results showed that when the dosage of nano platey kaolin with high aspect ratio and flaky shape was 10 parts， the best resistance performances were achieved with oxygen transmission rate (OTR) and water vapor transmission rate (WVTR) reaching 76.6 cm3/(m²·24 h) and 189.3 g/(m²·24 h)， respectively， which had decreased by 97% and 9%， compared to the base paper’s 2 520 cm3/(m²·24 h) and 207.3 g/(m²·24 h). The PVA/nano pigments composite coatings containing different dosages and forms of nano pigments could significantly improve the oxygen resistance performance of thin paper， but the improvements in moisture resistance performance were limited. When the same dosage of nano pigments was used， the OTR values of composite coatings containing nano platey kaolins， nano montmorillonite， nano layered double hydroxide， and nano silica were 76.5， 73.5， 50.2， and 90.2 cm3/(m²·24 h), respectively， with WVTR values of 189.3， 187.2， 185.6， and 197.3 g/(m²·24 h), respectively.
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