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Study on Improving the Mechanical Properties of Moulded Fiber Materials for Food Packaging
Received:April 28, 2022  
DOI：10.11980/j.issn.0254-508X.2022.08.001
Key Words:moulded fiber materials  mechanical strength  fiber types  strength additives  moulding parameters
Fund Project:国家自然科学基金项目（项目编号：32001276、32171727）。
Author NameAffiliationPostcode
CHENG Yun China National Pulp and Paper Research Institute Co.， Ltd.， Beijing， 100102
National Engineering Lab for Pulp and Paper， Beijing， 100102 		100102
ZHANG Hongjie* China National Pulp and Paper Research Institute Co.， Ltd.， Beijing， 100102
National Engineering Lab for Pulp and Paper， Beijing， 100102 		100102
ZHANG Xue China National Pulp and Paper Research Institute Co.， Ltd.， Beijing， 100102
National Engineering Lab for Pulp and Paper， Beijing， 100102 		100102
ZHAO Yumeng China National Pulp and Paper Research Institute Co.， Ltd.， Beijing， 100102
National Engineering Lab for Pulp and Paper， Beijing， 100102 		100102
HU Xiaoli China National Pulp and Paper Research Institute Co.， Ltd.， Beijing， 100102
National Engineering Lab for Pulp and Paper， Beijing， 100102 		100102
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Abstract:In order to expand the source of fiber raw materials for moulded pulp products and improve the mechanical properties of moulded fiber materials （MFs）， the effects of the process conditions on the mechanical properties of MFs were systematically studied in this paper， including the properties of cellulose fibers， beatability， additives， and moulding parameters. The results showed that the mechanical properties of MFs made by adding a certain amount of bamboo bleached chemical pulp （BBCP）， softwood bleached kraft pulp （SBKP）， and hardwood bleached chemi-thermo-mechanical pulp （HBCTMP）， respectively， were all improved in comparison to that of MFs with 100% bagasse bleached kraft pulp （BBKP）. Especially， there was a synergistic effect between HBCTMP and BBKP， the combination of HBCTMP and BBKP at 1∶1 could increase the tensile index， burst index and stiffness of MFs by 22.0%， 65.8% and 12.4% compared with 100% BBKP-based MFs， respectively. Among the additives in this paper， modified starch performed the best enhancement effect， compared with 100% BBKP-based MFs without any additives， the tensile index， burst index and stiffness increased by 15.3%， 28.3% and 9.8% when the addition amount of modified starch was 1.5%， respectively. Moreover， the pressure showed significant influence on the mechanical properties of MFs during the hot pressing process， and the optimal moulding parameters under the test conditions were 170℃， 60 s， 0.5 MPa.
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