Easy to master! These are all you need for corrugated box inspection—Part 1

Do you ever have this kind of question? ？

What my product should do Which tests ？

These All tests are necessary. Huh?

Do Finished What's the use? What about that?

Dr. Bao clarifies and answers questions for everyone.

Today's product selection: Corrugated cardboard box

The test items required include: edge compression strength, bursting strength, puncture resistance, adhesion strength, compressive strength, moisture-proof performance, moisture content, and delamination weight.

Edge Compression Strength Test

Edge crush strength is the pressure a specimen of a certain width can withstand per unit length, referring to its ability to resist forces applied parallel to the corrugation direction.

(Xiaomin Talks Testing: This test assesses the ability of the corrugated liner inside corrugated boxes to withstand pressure—it directly affects the box’s overall supporting strength. Corrugated boxes rely primarily on the inner corrugated liner to bear weight, making edge crush testing the best way to evaluate the strength of that liner.)

Puncture Resistance Test

Tensile strength refers to the maximum pressure, uniformly applied perpendicular to the sample surface under experimental conditions, that paper or cardboard can withstand per unit area. This test evaluates the ability of cardboard boxes to endure static, localized compression during real-world transportation scenarios.

(Xiaomin Talks Testing: This test assesses the cardboard box's ability to withstand handling, loading, unloading, impacts, and tearing forces during transit. The bursting strength of the cardboard depends on the bursting strength of the raw paper used, which is influenced by the surface paper, linerboard, and (middle paper)—but not by the corrugated fluting in between.)

Puncture Strength Test

Puncture strength is defined as the work required to push a cone of a specific shape completely through a cardboard sample—this includes both the energy needed to initiate the puncture and the additional energy required to tear, bend, and ultimately create a hole in the cardboard. It is measured in joules (J) and serves as a key indicator of how well the cardboard can withstand sudden external impacts.

(Xiaomin Talks Testing: This test assesses the impact resistance of cardboard boxes during use or transportation, demonstrating how well corrugated cardboard can withstand impacts from sharp objects. Penetration strength is closely linked to factors such as the fiber toughness, hardness, density, and moisture content of the original paper, as well as the bonding strength of the corrugated board and its overall thickness.)

Adhesion Strength Test

Adhesion strength refers to the force required to separate a unit length of the corrugated cardboard's glued flutes under specified test conditions, expressed in newtons per meter (N/m).

(Xiaomin Talks Testing: This test assesses the strength and durability of the bond between the liner paper and core paper in corrugated cardboard. If the adhesion isn’t strong enough, it can compromise the cardboard’s structural integrity, making the layers prone to delamination during use. Ultimately, this directly reduces the finished carton’s ability to withstand shocks and compression, leaving products less effectively protected.)