A new method for determining air permeabilities of wood-based panels

Takashi Tanaka

doi:10.4067/s0718-221x2021000100406

Authors

Takashi Tanaka

DOI:

https://doi.org/10.4067/s0718-221x2021000100406

Keywords:

MDF, OSB, particleboard, plywood, pressure measurement

Abstract

In this study, a new apparatus for measuring the air permeability of wood-based panel specimens without using water displacement was developed with the aim of decreasing the influence of variation in atmospheric pressure on permeability measurement. Validation experiments were conducted using plywood, oriented strand board (OSB), particleboard, and medium-density fiberboard (MDF) panels and a control specimen sealed with an epoxy resin. The background (leakage) flow of the apparatus was evaluated based on the experimental results of the control specimen. A methodology for the determination of air permeability based on Darcy’s law for gases and the evaluated background flow rate was proposed. The results of the current study were compared with those obtained in a previous study, indicating that the new method provides valid measurements for wood-based panels with high and low air permeability. No significant influence of variation in atmospheric pressure on the experimental results was observed, suggesting that the proposed method is suitable for a long-term continuous experiment for evaluating a specimen with extremely low permeability.

Downloads

Download data is not yet available.

References

Ai, W., Duval, H., Pierre, F., Perré, P. 2017. A novel device to measure gaseous permeability over a wide range of pressures: characterisation of slip flow for Norway spruce, European beech and wood-based materials. Holzforschung 71: 147-162. https://doi.org/10.1515/hf-2015-0264

Comstock, G.L. 1970. Directional permeability of softwoods. Wood Fiber Sci 1(4): 283–289. https://www.fpl.fs.fed.us/documnts/pdf1970/comst70a.pdf

Choong, E.T.; Fogg, P.J. 1968. Moisture movement in six wood species. For Prod J 18(5): 66–70.

Fujii, T.; Suzuki, Y.; Kuroda, N. 1997. Bordered pit aspiration in the wood of Cryptomeria japonica in relation to air permeability. IAWA J 18(1): 69–76. https://doi.org/10.1163/22941932-90001462

Japan Meteorological Agency. 2020. Statistics in Shizuoka City on June 30th, 2020. http://www.data.jma.go.jp/obd/stats/etrn/view/10min_s1.php?prec_no=50&block_no=47656&year=2020&month=06&day=30&view=p1

Lihra, T.; Cloutier, A.; Zhang, S.Y. 2000. Longitudinal and transverse permeability of balsam fir wet wood and normal heartwood. Wood Fiber Sci 32(2): 164–178. https://wfs.swst.org/index.php/wfs/article/view/1581

Matsumura, J.; Tsutsumi, J.; Oda, K. 1994. Relationships of bordered pit aspiration to longitudinal gas permeability in a given stem level: preliminary discussion on air-dried wood of Cryptomeria japonica and Larix leptolepis (in Japanese). Bull Kyushu Univ For 71: 35–46. https://doi.org/10.15017/10935

Perré, P. 1987. Measurements of softwoods’ permeability to air: importance upon the drying model. Int Commun Heat Mass Transf 14: 519–529. https://doi.org/10.1016/0735-1933(87)90016-9

Perré, P. 2007. Fluid migration in wood. In: Perré, P. (ed) Fundamentals of wood drying. A.R.BO.LOR., Nancy, France, pp. 125–156.

Petty, J.A.; Puritch, G.S. 1970. The effects of drying on the structure and permeability of the wood of Abies grandis. Wood Sci Technol 4: 140–154. https://doi.org/10.1007/BF00365299

Poonia, P.K.; Hom, S.K.; Sihag, K.; Tripathi, S. 2016. Effect of microwave treatment on longitudinal air permeability and preservative uptake characteristics of chir pine wood. Maderas-Cienc Tecnol 18(1): 125–132. http://dx.doi.org/10.4067/S0718-221X2016005000013

Rayirath, P.; Avramidis, S. 2008. Some aspects of western hemlock air permeability. Maderas-Cienc Tecnol 10(3): 185–193. http://dx.doi.org/10.4067/S0718-221X2008000300002

Resch, H.; Echlund, B.A. 1964. Permeability of wood-exemplified by measurements on redwood. For Prod J 14(5): 199–206.

Siau, J.F. 1995. Permeability. In Wood: influence of moisture on physical properties. Siau, J.F. (ed.). Virginia Polytechnic Institute and State University, Blacksburg NY, USA, pp. 39–58.

Taghiyari, H.R.; Avramidis, S. 2019. Specific gas permeability of normal and nanosilver-impregnated solid wood species as influenced by heat-treatment. Maderas-Cienc Tecnol 21(1): 89–96. https://doi.org/10.4067/S0718-221X2019005000108.

Tanaka, T. 2014. Determination of the air permeabilities of wood-based panels in the through-thickness direction by using rising-water volume displacement method. (in Japanese) Mokuzai Kogyo 69(12): 589–593.

Tanaka, T.; Kawai, Y.; Sadanari, M.; Shida, S.; Tsuchimoto, T. 2015. Air permeability of sugi (Cryptomeria japonica) wood in the three directions. Maderas-Cienc Tecnol 17(1): 17–28. http://dx.doi.org/10.4067/S0718-221X2015005000002.