Carton Selection, Filling, and Labeling Standards Verified by US Importers
In export trade to the United States, professional-grade carton packaging directly impacts cargo clearance efficiency, transportation safety, and customer satisfaction. Over 68% of cargo damage stems from improper packaging (ISTA data), while carton solutions compliant with US standards can reduce returns and claims by up to 30%.
Core Carton Specifications and US Compliance Comparison Table
| Carton Type | ECT Strength | Suitable Cargo Weight | US Standard Certification | Filling Requirements | Typical US Application Scenarios |
|---|---|---|---|---|---|
| Single-Wall Corrugated Box | 32 ECT | ≤20 kg | ASTM D5639 | Void fill ≥5 cm | Light industrial products, textiles |
| Double-Wall Corrugated Box | 44 ECT | 20-30 kg | FedEx 201B | Buffer corner pads + filling | Electronics, small machinery |
| Heavy-Duty Triple-Wall Box | 55 ECT | 30-50 kg | UPS 260L | Custom foam inserts | Industrial parts, instruments |
| Wood-Frame Reinforced Box | 75+ ECT | ≥50 kg | NMFC Clause 222 | Full-wrap cushioning | Precision equipment, high-value goods |
Four Steps to Build a US-Compliant Packaging System
1. Scientific Carton Selection
- Wet Strength Certification: High humidity at US ports requires TAPPI T402 testing
- Recycling Symbol Printing: Must include recycling codes and instructions per FTC Green Guides
- Size Optimization: Match US standard pallet size 48″×40″ for maximum container loading efficiency
2. Buffer Filling Standards
Layered design based on cargo characteristics:
- Shock Absorption Layer: EPE/EPP molded inserts (for fragile items)
- Stabilization Layer: Inflatable air bags + corner protectors (prevents shifting)
- Surface Layer: Anti-static film (for electronics)
3. Labels and Markings
US Customs mandatory requirements:
- HTS Code: Clearly printed on at least two adjacent sides of the carton
- Country of Origin Marking: “Made in China” with font height ≥5 cm
- Warning Labels: Such as “This Side Up” or “Fragile” per ANSI Z535.4
4. Testing and Validation Process
Essential pre-export tests:
- Drop Test: Six faces, three edges, dropped once each from 90 cm height
- Vibration Test: Simulate 3 hours of random vibration for ocean freight
- Compression Test: Stacking height not less than 3.5 meters
Contact Us for Custom Sizes & Private Label Options
Email：packing@siliangdi.com
Email：SLD@siliangdi.com