What is the difference between single-wall, double-wall, and triple-wall corrugated cardboard?

Corrugated cardboard strength is primarily determined by how many fluted and linerboard sheets are layered together:

### 1. Single-Wall Corrugated (3 Layers: Liner - Flute - Liner)

• Structure: One fluted corrugated medium sandwiched between two flat linerboards (e.g., E, B, or C flute).


• Best for: Standard e-commerce mailers, retail product boxes, subscription boxes, and items weighing up to 10kg–15kg.


• Benefits: Lightweight, cost-effective, easy to fold, and highly printable.

### 2. Double-Wall Corrugated (5 Layers: Liner - Flute - Liner - Flute - Liner)


• Structure: Two fluted layers combined with three linerboards (commonly BC-flute or EB-flute).


• Best for: Heavy goods, fragile electronics, glassware, bulk shipping cartons, and items weighing up to 30kg–40kg.


• Benefits: Outstanding puncture resistance, superior vertical stack strength, and excellent shock absorption in courier networks.

### 3. Triple-Wall Corrugated (7 Layers: 3 Flutes + 4 Liners)


• Structure: Three fluted mediums between four heavy-duty liners.


• Best for: Heavy industrial equipment, machinery parts, automotive components, chemical shipping, and export freight replacing timber wooden crates.


• Benefits: Capable of supporting several hundred kilograms with extraordinary crushing resistance.

### Summary Selection Guide:


• E-Commerce Mailer: Single Wall (E-Flute or B-Flute)


• Outer Shipping Master Carton: Double Wall (BC-Flute)


• Heavy Industrial / Export: Triple Wall