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In plywood manufacturing, veneer cores refer to the layers of wood that make up the inner structure of the panel. These cores are sliced from logs into thin sheets (veneers) and then glued together in cross-grain patterns to form a stable, strong board. The core wood species significantly influence the mechanical strength, moisture resistance, screw-holding capacity, environmental impact, and cost-effectiveness of plywood.
Each species brings different characteristics to the plywood:
Wood Species | Origin | Density (kg/m³) | Strength (MOR, MPa) | Moisture Resistance | Bonding Quality | Workability | Sustainability | Price |
|---|---|---|---|---|---|---|---|---|
Rubberwood | SE Asia (VN, TH) | ~650–720 | 80–90 | Good (low swelling) | Excellent | Excellent | FSC-certified (Renewable) | Mid-range |
Poplar | China, EU | ~380–450 | 55–70 | Poor | Good | Very Easy | Renewable | Economical |
Eucalyptus | Asia, LATAM | ~600–750 | 90–110 | Moderate | Excellent | Tough | Moderate (Fast-growing) | High |
Beech | Europe | ~720–800 | 100+ | Moderate | Excellent | Moderate | Slow-growth | High |
Pine/Softwoods | EU, Americas | ~450–550 | 60–80 | Fair | Moderate | Good | Plantation-grown | Economical |
Coconut Wood | SEA, South Asia | ~600–950 (varies) | Variable | Moderate | Moderate–Good | Moderate | Renewable | Economical |
Birch | Russia, EU | ~650–750 | Very High | Moderate | Excellent | Moderate | Less available | High |
Mixed Hardwood | SEA, Indonesia | Varies | High | Varies | Moderate | Moderate | Depends on sourcing | Varied |
Rubberwood (Hevea brasiliensis) is rapidly emerging as one of the most versatile and sustainable options for veneer cores. Here's why:
Rubberwood has a modulus of rupture (MOR) between 80–90 MPa, outperforming species like poplar and matching eucalyptus in some configurations. This strength ensures its use in structural-grade panels.
Rubberwood veneers form strong adhesive bonds with PF and WBP glues, making them highly compatible with both interior and exterior-grade plywood.
Unlike slow-growing hardwoods (like beech or maple), rubberwood is harvested after its latex-producing years (usually 25–30 years), making it a true circular-economy species. It utilizes what would otherwise be waste.
Rubberwood has a fine, even texture and straight grain, which not only facilitates veneer production but also reduces warping, enhancing panel stability.
With proper pressing and adhesive, rubberwood-core plywood can achieve excellent dimensional stability and low thickness swelling, making it suitable for humid climates.
Compared to high-density hardwoods like beech, rubberwood offers a lower price point with comparable performance — ideal for furniture, cabinets, packing, and flooring substrates.
At ANN PLYWOOD, we are committed to high-quality and sustainable manufacturing. Our rubberwood core plywood products are:
