FAQ
FAQ: How Strong Is Corrugated Board?
Frequently asked questions about corrugated board strength, ECT ratings, and stacking performance.
Quick Answer
Corrugated board strength depends on wall structure, flute type, liner quality, ECT rating, and environmental humidity. Single wall board suits lighter products, while double or triple wall board handles heavier stacking loads.
FAQ 1: What makes corrugated board strong?
The fluted medium between liners creates a sandwich structure that resists bending and compression. Liner grade and adhesive bonding quality also affect real strength.
FAQ 2: How is strength measured?
Common tests include ECT (Edge Crush Test), burst strength, and flat crush test (FCT). ECT is widely used for stacking decisions.
FAQ 3: Is thicker board always stronger?
Not always. Board construction, liner basis weight, and adhesive quality matter as much as thickness.
FAQ 4: How much weight can a corrugated carton hold?
It depends on board grade and stacking pattern. Buyers should test with actual product weight and pallet height rather than relying on general estimates.
FAQ 5: Does humidity reduce board strength?
Yes. Moisture can soften paper fibers and weaken bonding. Export buyers in humid climates should select appropriate board grade and storage protection.
PackTrades Recommendation
Ask suppliers for ECT data and run a stacking test before finalizing carton specifications for export or warehouse storage.