Laminated Veneer Lumber (LVL) is a high-strength engineered wood product widely used in construction, furniture, and packaging. As one of Southeast Asia’s fastest-growing manufacturing hubs, Vietnam has become a leading exporter of LVL to countries like Korea, Japan, Malaysia, and Singapore.
Understanding the LVL production process is essential for importers who want consistent quality and performance. In this article, we walk you through how Vietnamese factories—especially TT&H Plywood—manufacture LVL, step by step.
1. Veneer Selection and Drying
Process:
LVL production starts by peeling veneers from plantation-grown hardwood logs, commonly acacia or eucalyptus. These veneers are then dried to a target moisture content of 8–12% using roller or belt dryers.
TT&H Advantage:
We use automated moisture control systems to ensure each veneer meets specifications. Over-dried or under-dried sheets are rejected before assembly to avoid internal stress or weak bonding.
2. Veneer Grading and Repair
Process:
Dried veneers are sorted based on thickness, grain direction, knots, and other visual defects. Depending on their quality, they are assigned to core layers, crossbands, or surface layers.
TT&H Advantage:
Our grading system ensures each layer plays its role in strength and appearance. Damaged veneers are either repaired or removed from the production line.
3. Glue Application
Process:
A uniform layer of adhesive—usually phenol-formaldehyde for structural use or melamine-urea-formaldehyde for indoor use—is applied to each veneer sheet using controlled glue spreaders.
TT&H Advantage:
We test every glue batch for bonding strength, curing time, and viscosity. The amount of glue is adjusted based on veneer density and thickness for optimal penetration and minimal bleed-through.
4. Veneer Assembly and Pre-Pressing
Process:
The glued veneers are assembled in alternating grain directions and placed into a pre-press to remove air bubbles and stabilize the layup before hot pressing.
TT&H Advantage:
Our trained team ensures precise veneer alignment to prevent overlaps, core gaps, or edge misalignment, which are common issues in lower-grade production.
5. Hot Pressing
Process:
The veneer stack is hot-pressed under high pressure (typically 8–10 kg/cm²) and temperature (120–150°C), depending on glue type and final thickness. Pressing time ranges from a few minutes to over 20 minutes.
TT&H Advantage:
We offer LVL thickness up to 100mm, and all pressing parameters are digitally monitored for consistency across batches.
6. Edge Cutting, Sanding, and Strip Trimming
Process:
After pressing, each panel undergoes:
- Edge Cutting to standard or custom sizes (e.g. 1220x2440mm),
- Sanding to smooth the surface and ensure uniform thickness,
- Strip Trimming to produce LVL beams or planks as per buyer specifications.
Panels may also be edge-sealed, shrink-wrapped, or bundled based on customer packaging needs.
TT&H Advantage:
We provide custom trimming, and our equipment can handle LVL panels up to 100mm thick, suitable for heavy-duty and structural applications.
7. Quality Inspection and Packing
Process:
Final inspection covers moisture content, thickness, bonding strength, straightness, and appearance. Passed products are packed for export.
TT&H Advantage:
Our QC team follows strict export protocols. We provide inspection reports, moisture readings, and container photos for every shipment, giving buyers peace of mind.
Why Choose TT&H for Your Vietnamese LVL Supply?
TT&H Plywood is a manufacturer, not a middleman. We serve clients across Korea, Japan, Malaysia, Singapore, and more with:
- Full factory control and customized production
- Reliable English-speaking export team
- Transparent pricing and documentation
- Real-time factory videos and quality tracking
- Flexible order volumes and fast lead times
Our long-term partners appreciate our commitment to quality, consistency, and communication.
Conclusion
The LVL manufacturing process requires precision at every step—from veneer drying to hot pressing and final trimming. Choosing a supplier with strong process control is essential to ensure strength, durability, and value.
Want to see our LVL quality for yourself? Contact TT&H today to request samples, technical specs, or a video tour of our factory.