Composites from southern pine juvenile wood. Part 1. Panel fabrication and initial properties

Flakeboard, particleboard, and fiberboard panels were manufactured from four different sources of southern pine (Pinus taeda L.) juvenile wood. The sources were: 1) fast-grown trees; 2) the inner core of older trees; 3) branches; and 4) tops. The juvenile wood particle sizes and panel densities were similar to those used for control panels made from mature southern pine wood. Overall, the initial (72?F, 66% relative humidity conditions) modulus of elasticity, modulus of rupture, and internal bond of the juvenile wood composites were comparable to the mature wood composite values. However, the higher compaction ratios needed for the juvenile wood panels have implications and possibilities that may affect the commercial use of this furnish. In future publications, the durability and dimensional stability of juvenile wood composites (Part 2) and the properties of panels made from mixtures of juvenile and mature wood particles (Part 3) will be reported.

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