Formation of the density profile and its effects on the properties of fiberboard
Two main types of fiberboards were produced using lauan (Shorea spp.) fibers with an isocyanate resin as the binder; fiberboard with a flat, homogeneous (homoprofile), and typical U-shaped (conventional) density profile along the board thickness. The processing parameters included manipulation of ma...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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Springer Japan
2000
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| Online Access: | http://psasir.upm.edu.my/id/eprint/115625/ http://psasir.upm.edu.my/id/eprint/115625/1/115625.pdf |
| _version_ | 1848866827514413056 |
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| author | Wong, Ee Ding Zhang, Min Wang, Qian Han, Guangping Kawai, Shuichi |
| author_facet | Wong, Ee Ding Zhang, Min Wang, Qian Han, Guangping Kawai, Shuichi |
| author_sort | Wong, Ee Ding |
| building | UPM Institutional Repository |
| collection | Online Access |
| description | Two main types of fiberboards were produced using lauan (Shorea spp.) fibers with an isocyanate resin as the binder; fiberboard with a flat, homogeneous (homoprofile), and typical U-shaped (conventional) density profile along the board thickness. The processing parameters included manipulation of mat moisture content distribution, press closing speed, and hot pressing method. The results are summarized as follows: (1) A larger variation was observed in the peak density (PD) and core density (CD) of fiberboards at 0.5g/cm 3 mean density (MD) level than in those at 0.7g/cm3. Generally, PD showed a greater variation than CD, irrespective of MD level. (2) Boards produced using two-step hot pressing recorded substantially higher PD with reduced CD. (3) Multiple regression analysis showed that CD and PD could be calculated based on the other profile defining factors, and a rough estimation for peak distance and gradient factor was possible. (4) Based on static bending, conventional fiberboard had a higher modulus of rupture (MOR) than the homo-profile board but a similar modulus of elasticity (MOE). (5) At 0.5g/cm3 the MOR and dynamic MOE of fiberboard increased by up to 67% and 62%, respectively, when the PD increased from 0.5 to 1.07g/cm 3. Similarly, an increase of PD from 0.7 to 1.1g/cm3 resulted in corresponding increases of 55% and 34% in the MOR and dynamic MOE of 0.7g/cm3 boards. (6) The internal bond strength and screw withdrawal resistance were almost entirely dependent on the CD and MD, respectively. (7) Homo-profile fiberboards registered higher thickness swelling and water absorption than conventional fiberboards throughout the dry/wet conditioning cycle. |
| first_indexed | 2025-11-15T14:26:47Z |
| format | Article |
| id | upm-115625 |
| institution | Universiti Putra Malaysia |
| institution_category | Local University |
| language | English |
| last_indexed | 2025-11-15T14:26:47Z |
| publishDate | 2000 |
| publisher | Springer Japan |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | upm-1156252025-03-10T02:57:20Z http://psasir.upm.edu.my/id/eprint/115625/ Formation of the density profile and its effects on the properties of fiberboard Wong, Ee Ding Zhang, Min Wang, Qian Han, Guangping Kawai, Shuichi Two main types of fiberboards were produced using lauan (Shorea spp.) fibers with an isocyanate resin as the binder; fiberboard with a flat, homogeneous (homoprofile), and typical U-shaped (conventional) density profile along the board thickness. The processing parameters included manipulation of mat moisture content distribution, press closing speed, and hot pressing method. The results are summarized as follows: (1) A larger variation was observed in the peak density (PD) and core density (CD) of fiberboards at 0.5g/cm 3 mean density (MD) level than in those at 0.7g/cm3. Generally, PD showed a greater variation than CD, irrespective of MD level. (2) Boards produced using two-step hot pressing recorded substantially higher PD with reduced CD. (3) Multiple regression analysis showed that CD and PD could be calculated based on the other profile defining factors, and a rough estimation for peak distance and gradient factor was possible. (4) Based on static bending, conventional fiberboard had a higher modulus of rupture (MOR) than the homo-profile board but a similar modulus of elasticity (MOE). (5) At 0.5g/cm3 the MOR and dynamic MOE of fiberboard increased by up to 67% and 62%, respectively, when the PD increased from 0.5 to 1.07g/cm 3. Similarly, an increase of PD from 0.7 to 1.1g/cm3 resulted in corresponding increases of 55% and 34% in the MOR and dynamic MOE of 0.7g/cm3 boards. (6) The internal bond strength and screw withdrawal resistance were almost entirely dependent on the CD and MD, respectively. (7) Homo-profile fiberboards registered higher thickness swelling and water absorption than conventional fiberboards throughout the dry/wet conditioning cycle. Springer Japan 2000 Article PeerReviewed text en http://psasir.upm.edu.my/id/eprint/115625/1/115625.pdf Wong, Ee Ding and Zhang, Min and Wang, Qian and Han, Guangping and Kawai, Shuichi (2000) Formation of the density profile and its effects on the properties of fiberboard. Journal of Wood Science, 46 (3). pp. 202-209. ISSN 1435-0211; eISSN: 1435-0211 https://jwoodscience.springeropen.com/articles/10.1007/BF00776450 10.1007/BF00776450 |
| spellingShingle | Wong, Ee Ding Zhang, Min Wang, Qian Han, Guangping Kawai, Shuichi Formation of the density profile and its effects on the properties of fiberboard |
| title | Formation of the density profile and its effects on the properties of fiberboard |
| title_full | Formation of the density profile and its effects on the properties of fiberboard |
| title_fullStr | Formation of the density profile and its effects on the properties of fiberboard |
| title_full_unstemmed | Formation of the density profile and its effects on the properties of fiberboard |
| title_short | Formation of the density profile and its effects on the properties of fiberboard |
| title_sort | formation of the density profile and its effects on the properties of fiberboard |
| url | http://psasir.upm.edu.my/id/eprint/115625/ http://psasir.upm.edu.my/id/eprint/115625/ http://psasir.upm.edu.my/id/eprint/115625/ http://psasir.upm.edu.my/id/eprint/115625/1/115625.pdf |