Corrugated packaging plays a crucial role in protecting goods during transportation and storage. Understanding the fundamentals of corrugated board and its testing methods is essential for ensuring the integrity of packaging solutions.

Corrugated Board Testing:

Burst Strength Test:

One of the primary tests for corrugated board is the burst strength test.

This test measures the force required to rupture the board.

Burst strength ensures that the packaging can withstand external pressures during shipping and handling.

Edge Crush Test (ECT):

ECT is another critical test that evaluates the compressive strength of the board's edges.

It helps determine the ability of the corrugated material to withstand stacking and vertical loads.

Flat Crush Test:

This test assesses the resistance of the corrugated board to a crushing force applied to its flat surfaces.

It is vital for gauging the board's strength when subjected to external pressure.

Moisture Resistance Test:

Corrugated board is susceptible to moisture, which can compromise its structural integrity.

Moisture resistance tests ensure that the board retains its strength even in humid conditions.

Corrugated Flutes:

Single Face:

The simplest corrugated structure, consisting of one layer of fluting adhered to one linerboard.

Provides minimal cushioning but is suitable for lightweight items.

Single Wall (Double Face):

The most common type, featuring a fluted layer sandwiched between two linerboards.

Strikes a balance between strength and weight, making it suitable for various applications.

Double Wall:

Comprises two layers of fluting between three linerboards.

Offers enhanced strength and durability, ideal for heavier or more fragile items.

Triple Wall:

The sturdiest option with three layers of fluting and four linerboards.

Designed for extremely heavy or large items requiring maximum protection.

The common flute designations include:

A-Flute:

The largest flute size with fewer flutes per foot.

Provides excellent cushioning and is suitable for packaging fragile items.

B-Flute:

Smaller and more numerous flutes per foot compared to A-flute.

Offers a good balance between strength and flexibility, commonly used for a variety of packaging applications.

C-Flute:

Medium-sized flutes with more flutes per foot than B-flute.

Provides good stacking strength and crush resistance, widely used for shipping boxes.

E-Flute:

The smallest flute size with the highest number of flutes per foot.

Offers a smooth surface and is often used for high-quality printing applications, making it suitable for retail packaging.

F-Flute:

Even smaller flutes than E-flute, providing a fine surface for printing.

Offers good stiffness and is commonly used for small retail packages

Tiansan is leading in Corrugated Box Packaging from design & manufacturing.