Properties of kenaf core binderless particleboard reinforced with kenaf bast fiber-woven sheets

Published Date
August 2005, Volume 51, Issue 4, pp 415–420

Title 
Properties of kenaf core binderless particleboard reinforced with kenaf bast fiber-woven sheets

Author 

Jianying Xu, 

Ragil Widyorini, 

Shuichi Kawai

Received: 

15 April 2004

Accepted: 

23 August 2004

DOI: 10.1007/s10086-004-0672-9

Cite this article as: 

Xu, J., Widyorini, R. & Kawai, S. J Wood Sci (2005) 51: 415. doi:10.1007/s10086-004-0672-9

Abstract

Kenaf composite panels were developed using kenaf bast fiber-woven sheets as top and bottom surfaces, and kenaf core particles as core material. During board manufacture, no binder was added to the core particles, while methylene diphenyldiisocyanate resin was sprayed to the kenaf bast fiber-woven sheet at 50 g/m2 on a solids basis. The kenaf composite panels were made using a one-step steam-injection pressing method and a two-step pressing method (the particleboard is steam pressed first, followed by overlaying). Apart from the slightly higher thickness swelling (TS) values for the two-step panels when compared with the one-step panels, there was little difference in board properties between the two composite panel types. However, the two-step pressing operation is recommended when making high-density composite panels (>0.45 g/cm3) to avoid delamination. Compared with single-layer binderless particleboard, the bending strengths in dry and wet conditions, and the dimensional stability in the plane direction of composite panels were improved, especially at low densities. The kenaf composite panel recorded an internal bond strength (IB) value that was slightly low because of the decrease of core region density. The kenaf composite panel with a density of 0.45 g/cm3 (one-step) gave the mechanical properties of: dry modulus of rupture (MOR) 14.5 MPa, dry modulus of elasticity (MOE) 2.1 GPa, wet MOR 2.8 MPa, IB 0.27 MPa, TS 13.9%, and linear expansion 0.23%.

References

1. 1.
   Xu, J, Han, G, Wong, ED, Kawai, S 2003Development of binderless particleboard from kenaf core using steam-injection pressingJ Wood Sci49327332CrossRef
2. 2.
   Xu, J, Sugawara, R, Widyorini, R, Han, G, Kawai, S 2004Manufacture and properties of low-density binderless particleboard from kenaf coreJ Wood Sci506267CrossRef
3. 3.
   Kawasaki, T, Zhang, M, Kawai, S 1999Sandwich panel of veneer-overlaid low-density fiberboardJ Wood Sci44354360CrossRef
4. 4.
   Maloney, TM 1977Modern particleboard and dry-process fiberboard manufactureMiller FreemanSan Francisco600622
5. 5.
   Moslemi, AA 1974Particleboard. Vol 2: technologySouthern Illinois University PressCarbondale, IL139145
6. 6.
   Kawai S, Sasaki H, Yamauchi H (2001) Bio-mimetic approaches for the development of new wood composite products. 1st Wood Mechanics Conference, Lausanne, pp 503–514
7. 7.
   Ohnishi, K, Okudaira, Y, Zhang, M, Kawai, S 2000Manufacture and properties of oriented medium density fiberboard from non-wood lignocellulosic fibers I. Development of a mechanical orientor and its application to manufacturing oriented fiberboard (in Japanese)Mokuzai Gakkaishi46114123
8. 8.
   Japanese Industrial Standard (2003) JIS A 5908–2003 Particleboards
9. 9.
   Sekino, N, Suematsu, A, Fujimoto, Y, Kitani, Y, Wang, Q 2000Effect of manufacturing parameters on the linear expansion of densified wood composite panels I. Effect of element size and press temperature (in Japanese)Mokuzai Gakkaishi46334341
10. 10.
    Suematsu, A, Sekino, N, Fujimoto, Y, Kitani, Y, Wang, Q 2001Effect of manufacturing parameters on the linear expansion of densified wood composite panels II. Effect of board density, resin type and resin content on linear expansion of particleboard (in Japanese)Mokuzai Gakkaishi47129137

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