Particleboard
Particleboard is an engineered wood panel made from wood particles like sawdust, chips, and shavings combined with synthetic resin binders, pressed under heat (180–220°C) and pressure (35 kg/cm²) into a flat sheet with typical density 600–700 kg/m³. It offers uniform machining properties at low cost.
On the CNC router or nested-based line, particleboard is favored for its consistent density, enabling predictable panel cutting, pocketing, and drilling without grain-direction variations. This uniformity supports repeatable boring patterns for confirmat screws, cam-locks, and dowels in flat-pack cabinetry, where dimensional precision outweighs high bending strength. In millwork assembly, particleboard is typically edge-banded or laminated because raw edges are porous and weak; melamine, HPL, veneer, or paint systems adhere well to the face, but the core remains moisture-sensitive unless formulated with moisture-resistant resins. Mechanical properties are modest—internal bond around 0.40 N/mm², MOR 11–16.5 MPa—so applications emphasize cost and surface consistency over structural load. Shop-floor success relies on sharp tooling, proper feed rates, and immediate edge sealing to prevent moisture uptake and maintain fit-up.
- Router breakout at exits and edge blows: Brittle particleboard edges chip when feed is aggressive or tooling dull, causing crumbly exits on exposed edges and small radii.
- Fastener pull-out and over-torque failure: Incorrect pilot sizing or excessive torque strips the resin-bonded core, leading to stripped threads or mushroomed holes in low-density boards.
- Moisture swelling after exposure: Unsealed edges absorb humidity, causing panel swelling, warp, and joint failure in moisture-prone environments like kitchens and baths.
Is particleboard isotropic in machinability?
It is more uniform than solid wood because particle orientation is random, so cutting behavior is less grain-dependent. However, edge quality still varies as the porous particle structure can fracture at the cut boundary.
Why does particleboard perform well in CNC panel processing but poorly in wet environments?
CNC performance benefits from consistent density and flat panel form, which enable predictable machining. Wet-environment performance is limited by the resin system and particle porosity—moisture penetrates edges, causing thickness swelling and reduced joint integrity.
When is particleboard preferred over MDF or plywood?
Particleboard is preferred when cost control, flat-panel construction, and melamine-faced cabinetry are priorities in dry interior applications. Plywood outperforms it structurally, while MDF is denser and stronger for fine machining and profiling.