Effects of Hot-Pressing Parameters on Shear Strength of Plywood Bonded with Modified Soy Protein Adhesives
The heating rate of the core layer of plywood during hot-pressing is of great importance to the final quality of the plywood and is affected by many factors, such as the hot-pressing temperature (THP), hot-pressing pressure (PHP), hot-pressing time (tHP), veneer layers, and moisture content. In this...
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| Format: | Article |
| Language: | English |
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North Carolina State University
2014-08-01
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| Series: | BioResources |
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| Online Access: | http://ojs.cnr.ncsu.edu/index.php/BioRes/article/view/BioRes_09_4_5858_Li_Hot_Pressing_Parameters_Shear_Strength |
| _version_ | 1819089415530610688 |
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| author | Hongyan Li Congcong Li Hui Chen Derong Zhang Shifeng Zhang Jianzhang Li |
| author_facet | Hongyan Li Congcong Li Hui Chen Derong Zhang Shifeng Zhang Jianzhang Li |
| author_sort | Hongyan Li |
| collection | DOAJ |
| description | The heating rate of the core layer of plywood during hot-pressing is of great importance to the final quality of the plywood and is affected by many factors, such as the hot-pressing temperature (THP), hot-pressing pressure (PHP), hot-pressing time (tHP), veneer layers, and moisture content. In this study, multi-plywood using modified soy protein (MSP) adhesives prepared to investigate the effects of THP, tHP, and veneer layers on the core layer temperature during hot-pressing. The results indicated that all the core layer temperature curves were divided into four stages. The first constant temperature stage and the slow warming stage were decisive with respect to the time needed for the core layer to reach the THP. The time of moisture vaporization was approximately 400 s in the 3-layer plywood and approximately 900 s in the 5-layer plywood. In order to get an ideal strength the tHP should greater than the time of moisture vaporization; therefore in theory, the optimum parameters of the 3-layer plywood production were tHP of 600 to 720 s and THP of 120 to 125 °C. The research provides a theoretical basis for optimizing the hot-pressing of plywood. |
| first_indexed | 2024-12-21T22:07:34Z |
| format | Article |
| id | doaj.art-e4f408c8bb754dc9a7192967b08b2b8a |
| institution | Directory Open Access Journal |
| issn | 1930-2126 1930-2126 |
| language | English |
| last_indexed | 2024-12-21T22:07:34Z |
| publishDate | 2014-08-01 |
| publisher | North Carolina State University |
| record_format | Article |
| series | BioResources |
| spelling | doaj.art-e4f408c8bb754dc9a7192967b08b2b8a2022-12-21T18:48:41ZengNorth Carolina State UniversityBioResources1930-21261930-21262014-08-01945858587010.15376/biores.9.4.5858-5870Effects of Hot-Pressing Parameters on Shear Strength of Plywood Bonded with Modified Soy Protein AdhesivesHongyan Li0Congcong Li1Hui Chen2Derong Zhang3Shifeng Zhang4Jianzhang Li5Beijing Forestry UniversityMOE Key Laboratory of Wooden Material Science and Application, Beijing Key Laboratory of Wood Science and Engineering, MOE Engineering Research Center of Forestry Biomass Materials and Bioenergy, Beijing Forestry University, Beijing, 100083, ChinaMOE Key Laboratory of Wooden Material Science and Application, Beijing Key Laboratory of Wood Science and Engineering, MOE Engineering Research Center of Forestry Biomass Materials and Bioenergy, Beijing Forestry University, Beijing, 100083, ChinaMOE Key Laboratory of Wooden Material Science and Application, Beijing Key Laboratory of Wood Science and Engineering, MOE Engineering Research Center of Forestry Biomass Materials and Bioenergy, Beijing Forestry University, Beijing, 100083, ChinaMOE Key Laboratory of Wooden Material Science and Application, Beijing Key Laboratory of Wood Science and Engineering, MOE Engineering Research Center of Forestry Biomass Materials and Bioenergy, Beijing Forestry University, Beijing, 100083, ChinaMOE Key Laboratory of Wooden Material Science and Application, Beijing Key Laboratory of Wood Science and Engineering, MOE Engineering Research Center of Forestry Biomass Materials and Bioenergy, Beijing Forestry University, Beijing, 100083, ChinaThe heating rate of the core layer of plywood during hot-pressing is of great importance to the final quality of the plywood and is affected by many factors, such as the hot-pressing temperature (THP), hot-pressing pressure (PHP), hot-pressing time (tHP), veneer layers, and moisture content. In this study, multi-plywood using modified soy protein (MSP) adhesives prepared to investigate the effects of THP, tHP, and veneer layers on the core layer temperature during hot-pressing. The results indicated that all the core layer temperature curves were divided into four stages. The first constant temperature stage and the slow warming stage were decisive with respect to the time needed for the core layer to reach the THP. The time of moisture vaporization was approximately 400 s in the 3-layer plywood and approximately 900 s in the 5-layer plywood. In order to get an ideal strength the tHP should greater than the time of moisture vaporization; therefore in theory, the optimum parameters of the 3-layer plywood production were tHP of 600 to 720 s and THP of 120 to 125 °C. The research provides a theoretical basis for optimizing the hot-pressing of plywood.http://ojs.cnr.ncsu.edu/index.php/BioRes/article/view/BioRes_09_4_5858_Li_Hot_Pressing_Parameters_Shear_StrengthModified soy protein adhesivesPlywoodShear strengthCore layer temperature |
| spellingShingle | Hongyan Li Congcong Li Hui Chen Derong Zhang Shifeng Zhang Jianzhang Li Effects of Hot-Pressing Parameters on Shear Strength of Plywood Bonded with Modified Soy Protein Adhesives BioResources Modified soy protein adhesives Plywood Shear strength Core layer temperature |
| title | Effects of Hot-Pressing Parameters on Shear Strength of Plywood Bonded with Modified Soy Protein Adhesives |
| title_full | Effects of Hot-Pressing Parameters on Shear Strength of Plywood Bonded with Modified Soy Protein Adhesives |
| title_fullStr | Effects of Hot-Pressing Parameters on Shear Strength of Plywood Bonded with Modified Soy Protein Adhesives |
| title_full_unstemmed | Effects of Hot-Pressing Parameters on Shear Strength of Plywood Bonded with Modified Soy Protein Adhesives |
| title_short | Effects of Hot-Pressing Parameters on Shear Strength of Plywood Bonded with Modified Soy Protein Adhesives |
| title_sort | effects of hot pressing parameters on shear strength of plywood bonded with modified soy protein adhesives |
| topic | Modified soy protein adhesives Plywood Shear strength Core layer temperature |
| url | http://ojs.cnr.ncsu.edu/index.php/BioRes/article/view/BioRes_09_4_5858_Li_Hot_Pressing_Parameters_Shear_Strength |
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