Study on the Effect of Impregnation Process on Physical and Mechanical Properties of Chinese Fir LVL

Abstract:

Laminated veneer lumber (LVL) was manufactured from Chinese fir, which had been impregnated with laboratory prepared low-molecular-weight water-soluble phenol formaldehyde (PF) resin. The effects on the mechanical and physical properties of the LVL were investigated which made from veneer that had been subjected to various levels of the resin treatment. The results showed that either under conditions of normal temperature and pressure, or at increased pressure, the weight gain would increase with the impregnating time. Under the same impregnation technology, along with the increase of resin concentration, dry weigh gain increased, wet weight gain first increased and then decreased. Density of LVL increased, TS reduced, MOR and MOE first increased and then decreased as the weight gain increased.

• Periodical: Advanced Materials Research (Volumes 753-755)
• Pages: 848-852
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.753-755.848
• Online since: August 2013
• Authors: Yu Cheng Shen*, Li Ping Yin, Cheng Jian Huang, Chi Qiang Yao, Li Yu, Yan Jun Li
• Keywords: Chinese Fir, Impregnation Process, LVL, Property, Weight Gain Rate

References

[1] W.G. Zhang, B.F. Bao, J.L. Liu, et al. Research Progress on Densification of Plantation Grown Chinese Fir [J]. China Wood Industrial, Vol. 23, No. 2 (2009), pp.34-36.

[2] Y.F. Yang, L.F. Ma, Y.M. Yu, et al. physical and mechanical properties [J]. Journal of Zhejiang Forestry College, Vol. 13, No. 4 (1996), pp.371-377.

[3] Lloyd R. A., Stamm A. J. Effect of resin treatment and compression upon the weathering properties of veneer laminates [J]. Forest Pro. J., Vol. 8, No. 8(1985), pp.230-235.

[4] Y. H. Chui, M. H. Schneider, H. J. Zhang. Effect of resin impregnation and process parameters on some properties of polar LVL [J]. Forest Prod. J., Vol. 44, No. 8 (1994), pp.74-78.

[5] H.R. Liu, Y.B. Chai, J.L. Liu. Heat Transfer in Resin Impregnated Poplar LVL during Hot-pressing [J]. China Wood Industrial, Vol. 22, No. 1 (2008), pp.26-28.

[6] Z.K. Zhang, J.L. Liu. A Study on the Manufacture Technology of Poplar Compressed Strengthened LVL and the Analysis of Its Application Prospect [J]. Forestry Machinery & Woodworking Equipment, Vol. 33, No. 7 (2005), pp.28-30.

[7] X.Q. Wang, J.L. Liu, S.B. Zhang, et al. Processing Technology of Strengthened Bamboo/Wood Composite LVL [J]. China Wood Industrial, Vol. 19, No. 5 (2005), pp.7-9.

[8] H.W. Yu, H.Z. Liu, Y.J. Li, et al. Effect of Different Treatments of PF Formaldehyde Resin on Physical Properties of Laminated Veneer Lumber from Pine [J]. Journal of Zhejiang Forestry Science and Technology, Vol. 30, No. 5 (2010), pp.17-19.

[9] J.L. Liu, J. Li, Y.X. Liu, et al. Study on the Fixation Mechanism of Compressive Deformation of Wood by PF Resin Treatment [J]. Journal of Northeast Forestry University, Vol. 28, No. 5 (2000), pp.16-20.

[10] X.C. Yu. Research on Property of Fast Growing Fir Wood Impregnated with PF Resin [J]. China Forest Products Industry, Vol. 35, No. 4 (2008), pp.38-40.