Product Development from Veneer-Mill Residues: An Application of the Taguchi's Method


  • Levente Denes
  • Elemer M. Lang
  • Zsolt Kovacs


Veneer residues, composites, Taguchi's method, strength and stiffness, statistical process control, robust parameter design


The raw material used for decorative (face) veneer manufacturing consists mainly of hardwood logs, the highest in quality harvested for industrial purposes. Besides the common sawmill residuals, the clipping operation in the process produces quite long, strand-type vestiges, and large end-clipping cutoffs. During the course of the research project presented in this article, structural composite materials were designed and formulated using these clipping residues as principal furnish materials. A robust statistical product development technique, the Taguchi's method, helped to identify the effect of component factors on the expected mechanical properties of these novel products.

Results of three-factor/three-level analyses indicated that there is a linear positive correlation between target density and performance attributes (MOE and MOR). Increasing the content of end-clippings up to 25% resulted in decline of strength and stiffness. However, when the ratio was over 1 to 4, this trend proved to be negligible. Resin solid content within the selected range had no significant control over the examined panel properties.


Adair, C. 2003. Regional Production and Market Outlook: Structural Panels and Engineered Wood Products. 2003-2008. APA-EWS Mk0-E169.nAdler, P. J., V. E. Markova, And V. J. Granovszkij. 1977. Design of experiments for determination of optimal conditions (in Hungarian). Technical Publ., Budapest, Hungary. 252 ppnAmerican Society for Testing and Materials (ASTM). 1996A. Standard Methods for Testing Small Clear Specimens of Timber. ASTM D 143-83. ASTM, West Conshohocken, PA.nAdler, P. J., V. E. Markova, And V. J. Granovszkij. 1996b. Standard Test Methods for Evaluating Properties of Wood-Base Fiber and Particle Panel Materials. ASTM D 1037-94. ASTM, West Conshohocken, PA.nBarnes, D. 2000. An integrated model of the effect of processing parameters on the strength properties of oriented strand wood products. Forest Prod. J.50(11/12):33-42.nBarnes, D. 2001. A model of the effect of strand length and strand thickness on the strength properties of oriented wood composites. Forest Prod. J.51(2):36-46.nBooker, J. D, M. Raines, And K. G. Swift. 2001. Designing capable and reliable products. Butterworth Heinemann, Oxford, UK.nHassler, C. 2002. Veneer Residue Survey. Final Report to the Division of Forestry WVU. Balkan Tier Consulting Inc., Morgantown, WV. 17 pp.nJarck, W., And G. Sanderson. 2001. Scrimber lumber surfaces again in U.S. as TimTek. Panel World42(1):18-23.nLang, E. M., And L. Denes. 2002. Exploratory Research and Development of Veneer Strip Lumber (VSL) Using Clipping Residues. Unpubl. Research Rept. to the WVU RCGP. West Virginia University, Division of Forestry, Morgantown, WV. 22 pp.nMeyers, R. H, And D. C. Montgomery. 2002. Response surface methodology: Process and product optimization using designed experiments. 2nd ed., John Wiley and Sons, Inc. New York, NY. 798 pp.nMontgomery, D. C. 1997a. Introduction to statistical quality control. 3rd ed. John Wiley and Sons Inc. New York, NY. 677 pp.nMontgomery, D. C. 1997b. Design and analysis of experiments. 4th ed. John Wiley and Sons, Inc., New York, NY.nMontgomery, D. C. 1999. Experimental design for product and process design and development. The Statistician48(2):159-177.nNair, V. N. and panel discussants: B. Abraham, And J. Mackay; G. E. P. Box; R. N. Kacker; T. J. Lorenzen, J. M. Lucas, R. H. Meyers, And G. G. Vining; J. A. Nelder; M. S. Phadke; J. Sacks, And W. J. Welch; A. C. Shoemaker And K. L. Tsui; S. Taguchi; C. F. J. Wu. 1992. Taguchi's Parameter Design: A Panel Discussion Technometrics34(2):127-161.nOudjehane, A., And F. Lam. 1998. On the density profile within random and oriented wood-based composites panels: Horizontal distribution. Composites Part B.29(6): 687-693.nSmulski, S., Ed. 1997. Engineered wood products. A guide for specifiers, designers, and users. PFS Research Foundation, Madison, WI.nTaguchi, G. 1987. Introduction to quality engineering: Designing quality into products and processes. Asian Productivity Organization, Kraus Intl. Publ., White Plains, NY.nWinandy, J. E. 2002. Emerging material: What will durable materials look like in 2020? (PDF) Pages 13-18 in Enhancing the durability of lumber and engineered wood products. 11-13 February 2002. Kissimmee, FL. Forest Products Society, Madison, WI.n






Research Contributions