Furnish type and mat density effects on temperature and vapor pressure of wood-based panels during hot pressing

Published Date
April 2016, Volume 62, Issue 2, pp 168–173

Title 

Furnish type and mat density effects on temperature and vapor pressure of wood-based panels during hot pressing

• Author 

• Muhammad Navis Rofii, 
• Shuto Kubota, 
• Hikaru Kobori, 
• Yoichi Kojima, 
• Shigehiko Suzuki

Original article

First Online: 

20 January 2016

DOI: 10.1007/s10086-015-1531-6

Cite this article as: 

Rofii, M.N., Kubota, S., Kobori, H. et al. J Wood Sci (2016) 62: 168. doi:10.1007/s10086-015-1531-6

Abstract

The goals of this study were to determine the effects of furnish type and mat density on temperature and vapor pressure inside the mat of wood-based panels during hot pressing and to confirm their effects on panel properties. Two furnish types, hinoki strand (HS) and recycled wood particles (RW), were used for experimental panels using urea–formaldehyde resin at five board densities and 15 % mat moisture content. A monitoring device was used to sense the temperature and vapor pressure during hot pressing. The results from this study showed that furnish type and mat density affected temperature and vapor pressure behaviors. The results also showed the effect on panel properties. HS-board had a higher plateau temperature, longer plateau time, and higher vapor pressure than did Mixed- and RW-board. Higher mat density was associated with higher plateau temperature and vapor pressure and longer plateau time and vapor pressure band. Plateau time and temperature were also correlated with vapor pressure. Furthermore, density showed linear relationships with plateau temperature and internal bonding (IB). A linear relationship was also found between plateau temperature and IB, and non-linear relationships were found for vapor pressure with plateau temperature and IB.

References

1. 1.
   Kamke FA (2004) Physic of hot pressing. In: Proceedings of fundamentals of composite processing. General Technical Report FPL-149, USDA Forest Service, Forest Products Laboratory, Madison, pp 3–18
2. 2.
   Steffen A, von Haas G, Rapp A, Humphrey PE, Thoemen H (1999) Temperature and gas pressure in MDF-mats during industrial continuous hot pressing. Holz Roh Werks 57:154–155CrossRef
3. 3.
   Maloney TM (1993) Modern particleboard and dry-process fiberboard manufacturing. Miller Freeman Publication Inc, San Francisco, pp 519–520
4. 4.
   Meyer N, Thoemen H (2007) Gas pressure measurements during continuous hot pressing of particleboard. Holz Roh Werks 65:49–55CrossRef
5. 5.
   Kamke FA, Casey LJ (1988) Fundamentals of flakeboard manufacture: internal-mat conditions. For Prod J 38(6):38–44
6. 6.
   Garcia PJ, Avramidis S, Lam F (2001) Internal temperature and pressure responses to flake alignment during hot-pressing. Holz Roh Werks 59:272–275CrossRef
7. 7.
   Pichelin F, Pizzi A, Fruhwald A, Triboulot P (2001) Exterior OSB preparation technology at high moisture content, Part 1. Transfer mechanisms and pressing parameters. Holz Roh Werks 59:256–265CrossRef
8. 8.
   Dai C, Wang S (2004) Press control for optimized wood composite processing and properties, Part 1: Pressing variables and sensors. In: Proceedings of fundamental of composite processing. General Technical Report. FPL-149. USDA Forest Service, Forest Products Laboratory, Madison, pp 54–64
9. 9.
   Rofii MN, Yamamoto N, Ueda S, Kojima Y, Suzuki S (2014) The temperature behavior inside the mat of wood-based panel during hot pressing under various manufacturing conditions. J Wood Sci 60:414–420CrossRef
10. 10.
    JIS A-5908 (2003) JIS standard specification for particleboard (in Japanese). Japanese Standard Association, Tokyo
11. 11.
    Rofii MN, Yumigeta S, Kojima Y, Suzuki S (2013) Effect of furnish type and high-density raw material from mill residues on properties of particleboard panels. J Wood Sci 59:402–409CrossRef
12. 12.
    Sanjari E (2013) A new simple method for accurate calculation of saturated vapor pressure. Thermochim Acta 560:12–16CrossRef
13. 13.
    Shmulsky R, Jones PD (2011) Forest products and wood science: an introduction, 6th edn. Wiley-Blackwell, Chichester, p 496CrossRef
14. 14.
    Halligan AF, Schniewind AP (1974) Prediction of particleboard mechanical properties at various moisture contents. Wood Sci Tech 8:68–78
15. 15.
    Wong ED, Zhang M, Wang Q, Kawai S (1998) Effects of mat moisture content and press closing speed on the formation of density profile and properties of particleboard. J Wood Sci 44:287–295CrossRef
16. 16.
    Jin J, Dai C, Hsu WE, Yu C (2009) Properties of strand boards with uniform vertical density profiles. Wood Sci Tech 43:559–574CrossRef
17. 17.
    Chen S, Du C, Wellwood R (2010) Effect of panel density on major properties of oriented strandboard. Wood Fiber Sci 42(2):177–184
18. 18.
    Kelly MW (1977) Critical literature review of relationships between processing parameters and physical properties of particleboard. General Technical Report. FPL-10. USDA Forest Service, Forest Products Laboratory, Madison, p 65

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