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Introduction to Corrugated Packaging
Yongquan Zhou, CPP
Project EngineerFedEx Packaging Design and Development
and
Adjunct FacultyCBU School of Engineering
Corrugated fiberboard
• Construction (1, 2)
Corrugated fiberboard consists essentially of two flat parallel sheets (liners) of paperboard, with a central fluted or corrugated sheet between them. The combined board is held together with adhesive applied to the crests of the fluted sheet.
• Fiberboard grades
Linerboard - Table 15.1Corrugating medium - Table 15.2
• Corrugating adhesives
Starch-based adhesiveModified or supplemented starch-based adhesiveWeather-resistant adhesiveWater-resistant adhesive
Corrugated Fiberboard
Corrugated Fiberboard - continued
Corrugated Fiberboard - continued
Corrugated Fiberboard - continued
Corrugated Fiberboard - continued
Corrugated Fiberboard - continued
Corrugated Boxes - continued
Corrugated Boxes - continued
Corrugated boxes
• McKee formula
Box Compression Strength = 5.87 X ECT X SQRT(BP X T)
Note: Estimated RSC top-to-bottom box compression strength = , KN (lbf)
WhereECT = edge crush test, KN/m (lbf/in);BP = inside box perimeter, m (in);T = combined board thickness, m (in)
Corrugated fiberboard and box properties and tests
• Corrugated board properties and tests
Mullen burst testEdgewise compression test (ECT)
• Box compression strength
- Estimate - McKee formula
Box Compression Strength = 5.87 X ECT X SQRT(BP X T)
Note: Estimated RSC top-to-bottom box compression strength = , KN (lbf)
Where
ECT = edge crush test, KN/m (lbf/in);BP = inside box perimeter, m (in);T = combined board thickness, m (in)
- Compression test in the lab
Corrugated boxes
• Dimensioning
Length (L) Width (W) Depth (H)
• Outer dimension (OD) or inner dimension (ID)
• Loading orientation
Top-loading boxesEnd-opening boxesSide-opening boxes
• Flute direction and manufacturer's joint
Corrugated boxes
• Select the correct flute
A-fluteB-fluteC-fluteE-flute and F-flute
• Box styles and design variations
Regular slotted containers (RSC) (1, 2, 3)Die-cut (1, 2, 3, 4)Bliss box
Carrier rules and regulations and box certificate
• Carrier rules and regulations
- Carrier rules and regulations - truck, rail (1)
- Carrier rules and regulations - small parcle and express
• Box maker’s certificate (2)
Computer-aided package design programs
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