Why Choose 5-Ply Corrugated Boxes?
Five-layer (5-ply) corrugated cartons are the industrial-grade standard for protecting heavy, fragile, or high-value shipments. With 2 outer liners, 2 fluted mediums, and 1 inner liner, they provide:
✔ 2X stronger than standard 3-ply boxes
✔ Burst strength up to 500 lbs/sq in
✔ Edge crush test (ECT) ratings of 55+
✔ Reusable & 100% recyclable
Product Parameters：
Material | Art paper, Cardboard, Special paper, Cool paper, etc |
Size | Customized Size |
Printing | CMYK/PMS Printing or Pantone color printing |
Artwork format | AI, PDF, EPS, High resolution JPG File |
Finish &Process | Glossy/matte lamination, varnish, deboss/emboss, laser cut, UV Coating, Gold/Silver, hot stamping, silk screen printing. |
Accessories | Ribbon, handle, diamond, lock, button, blister, foam, PVC/PET/PP window, fabric, velvet |
Machine | Heidelberg 4C press, Komori 4C press, 6C UV label press, Lamination machine, die cut machine, cutter, hot stamping |
Lead time | Color boxes 7-10 days, handmade boxes15~20 days, stickers 3~7days. |
5-Layer Corrugated Carton Structure Explained
| Layer | Material | Function |
|---|---|---|
| Outer Liner | Kraft paper | Moisture/abrasion resistance |
| Flute Type B (3mm) | Corrugated medium | Shock absorption |
| Inner Liner | Test liner paper | Load distribution |
| Flute Type C (4mm) | Corrugated medium | Vertical compression strength |
| Outer Liner | Kraft paper | Print surface & stacking support |
Pro Tip: The combination of B+C flutes balances cushioning and rigidity – ideal for electronics, automotive parts, and machinery.
Key Applications
1. Heavy Industrial Shipping
Machinery parts (up to 150 lbs/box)
Engine components
Metal fabrication
2. International Export
Withstands:
✓ Container stacking (6+ layers)
✓ Humidity fluctuations
✓ Forklift handling
3. Fragile Item Protection
Laboratory glassware
Ceramics
Medical devices
Technical Specifications
[Comparison table: 3-ply vs 5-ply vs 7-ply]
| Parameter | 3-Layer | 5-Layer (Our Product) | 7-Layer |
|---|---|---|---|
| Thickness | 3-4mm | 6-7mm | 9-10mm |
| Max Load | 60 lbs | 150 lbs | 300 lbs |
| Price | $ | $ | $$ |
Cost-Efficiency Note: 5-ply reduces damage claims by 37% vs 3-ply (ISTA testing data).
Customization Options
[Gallery: Custom printed 5-layer boxes with company logos]
Sizes: From 12"x12"x12" to 48"x48"x48"
Printing: 4-color process, waterproof inks
Coatings: Water-resistant, anti-static, or fire-retardant
Accessories: Foam inserts, divider sets, pallet bases
Sustainability Advantages
FSC-certified paper sources
Biodegradable adhesives
Closed-loop recycling program available
Buyer’s Guide: How to Select 5-Ply Cartons
Weight Capacity: Calculate (item weight + 30% buffer)
Flute Profile:
B flute: Best for printing surfaces
C flute: Optimal all-purpose
Certifications: Look for ISTA 3A or MIL-STD-2073
Why Our 5-Layer Cartons Stand Out
✅ Free CAD box design service
✅ MOQ 100 units (lower than industry average)