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Polymers
Volume 13
Issue 21
10.3390/polym13213799
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Article

Effect of Glue Spreads on the Structural Properties of Laminated Veneer Lumber from Spindleless Rotary Veneers Recovered from Short Rotation Hevea Plantation Logs

by
Pui San Khoo
1,
Kit Ling Chin
1,*,
Chuan Li Lee
1,
Paik San H’ng
1,2,* and
Mohd Sahfani Hafizuddin
1
1
Institute of Tropical Forestry and Forest Products, Universiti Putra Malaysia, Serdang 43400, Malaysia
2
Faculty of Forestry and Environment, Universiti Putra Malaysia, Serdang 43400, Malaysia
*
Authors to whom correspondence should be addressed.
Polymers 2021, 13(21), 3799; https://doi.org/10.3390/polym13213799
Submission received: 3 August 2021 / Revised: 24 August 2021 / Accepted: 26 August 2021 / Published: 3 November 2021
(This article belongs to the Special Issue Cellulose Based Composites)
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Abstract

Unproductive young rubber trees (15 years old) with smaller diameters (15 to 18 cm) compared to conventional rubber logs, harvested at the age of 25 years old, were selected for the production of laminated panels. Spindleless rotary veneer peeling was applied to logs from short-rotation rubber forest plantations to produce veneers for structural purposes. This raises questions about the utilization of these small-diameter logs with respect to its effect on the quality of veneer and laminated panels produced. This study examines the effect of the glue spread rates on the physical and mechanical properties of rubberwood laminated veneer lumber (LVL). Analysis of variance shows that the application of a 280 g/m2 glue spread rate significantly improved the density, water absorption and dimensional stability of rubberwood LVL. The mechanical properties of rubberwood LVL produced with a 200 g/m2 glue spread rate met the minimum requirement for the 2.1E-3100F stress class; 91.05 MPa for the modulus of rupture in the flatwise direction and 50.23 MPa for compressive strength parallel to the longitudinal axis. The modulus of elasticity in the flatwise direction of 11,189.55 MPa reached the minimum requirement for the 1.5E-2250F stress class.
Keywords: laminated veneer lumber; small-diameter Hevea log; spindleless rotary veneers; glue spread rate; structural properties laminated veneer lumber; small-diameter Hevea log; spindleless rotary veneers; glue spread rate; structural properties

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MDPI and ACS Style

Khoo, P.S.; Chin, K.L.; Lee, C.L.; H’ng, P.S.; Hafizuddin, M.S. Effect of Glue Spreads on the Structural Properties of Laminated Veneer Lumber from Spindleless Rotary Veneers Recovered from Short Rotation Hevea Plantation Logs. Polymers 2021, 13, 3799. https://doi.org/10.3390/polym13213799

AMA Style

Khoo PS, Chin KL, Lee CL, H’ng PS, Hafizuddin MS. Effect of Glue Spreads on the Structural Properties of Laminated Veneer Lumber from Spindleless Rotary Veneers Recovered from Short Rotation Hevea Plantation Logs. Polymers. 2021; 13(21):3799. https://doi.org/10.3390/polym13213799

Chicago/Turabian Style

Khoo, Pui San, Kit Ling Chin, Chuan Li Lee, Paik San H’ng, and Mohd Sahfani Hafizuddin. 2021. "Effect of Glue Spreads on the Structural Properties of Laminated Veneer Lumber from Spindleless Rotary Veneers Recovered from Short Rotation Hevea Plantation Logs" Polymers 13, no. 21: 3799. https://doi.org/10.3390/polym13213799

APA Style

Khoo, P. S., Chin, K. L., Lee, C. L., H’ng, P. S., & Hafizuddin, M. S. (2021). Effect of Glue Spreads on the Structural Properties of Laminated Veneer Lumber from Spindleless Rotary Veneers Recovered from Short Rotation Hevea Plantation Logs. Polymers, 13(21), 3799. https://doi.org/10.3390/polym13213799

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