Corrugated Materials
Corrugated cardboard consists of one or more layers of corrugated core paper and face paper. Common types of corrugated boxes are as follows:
A Flute: 4.5~5 mm thick, the thickest, with good cushioning performance and stacking ability, suitable for fragile products or products with high stacking strength requirements.
B Flute: 2.5~3 mm thick, low thickness, more teeth, good compressive strength and surface flatness, suitable for printing. Commonly used in consumer goods, canned foods, etc.
C Flute: 3.5~4 mm thick, performance between A flute and B flute, is a common transport packaging flute type, with a wide range of uses.
E Flute: 1.1~2 mm thick, extremely thin flute type, flat surface, excellent printing effect, commonly used in display boxes and gift boxes.
Of course, many people choose double corrugation: AB corrugation, BC corrugation, EB corrugation, cushioning performance and printing effect are better.
Cardboard Thickness / Strength
3mm, 4mm and 5mm are the most common shipping box thicknesses. 3mm thick B-type corrugated boxes are lightweight and have a smooth surface, while 4~5mm C-type corrugated boxes provide stronger protection.
The heavier the paper weight, the thicker it is and the stronger it is.
250gsm is economical and suitable for cost-sensitive or lightweight products. 300gsm is the standard weight, which strikes a good balance between strength, appearance and cost. 350gsm paperboard has good tear and fold resistance and better printing effect.
Edge Crush Test - ECT
The maximum pressure that corrugated cardboard can withstand is a key indicator of the stacking strength of cartons. The unit is pounds per inch or kN/meter. Common grades are 32, 44, 48, and 51 ECT. It directly affects the safety of your products during transportation and warehousing.
Printing Sides
Shipping box allows you to print any side to show your brand and packaging information. It can be printed on the outside, inside, full, or no printing.
Types of shipping cardboard boxes
Transport cartons can be divided into the following types according to their structure: slotted type, folding type, box type, and lid type.
