The design of the cardboard box's body dimensions is unreasonable.

The dimensions of a cardboard box, particularly its length, width, and height, are closely related to its durability. Generally, the size of a cardboard box is determined based on the number of bottles to be packed and the bottle height. The box length is calculated as the number of bottles multiplied by the bottle diameter along the long direction, the box width as the number of bottles multiplied by the bottle diameter along the wide direction, and the box height is typically the bottle height. The perimeter of the box's four sides corresponds to the entire side wall supporting the box's pressure load. Generally, the longer the perimeter, the higher the compressive strength; however, this increase is not proportional. If the perimeter is too large, meaning there are more bottles inside, the gross weight of the entire box becomes heavier, placing higher demands on the cardboard for increased compressive strength and tear resistance to ensure its performance during transit. Otherwise, the cardboard is more prone to damage during transportation. In the market, the 596mL × 24 bottle pure water boxes are prone to damage** among all cardboard boxes due to their high gross weight and being single-walled cardboard, which makes them susceptible to damage during transit.

When the length and width of the cardboard box are the same, the height has a greater impact on the compressive strength of the empty box. With the perimeter of all four sides of the box remaining constant, as the height of the box increases, the compressive strength decreases, with a reduction of approximately 20%.

2. The corrugated board thickness does not meet the required specifications.

Due to wear during use, the corrugated roller can lead to insufficient thickness of the corrugated board, resulting in reduced compressive strength of the boxes and a decline in box strength.

3. Corrugated Box Wavy Deformation

Corrugated board that is prone to warping is inherently soft, with low flat strength and rigidity. Boxes made from such board tend to have lower compressive and puncture strengths.

The shape of the corrugation is directly related to the compressive strength of the corrugated board. The shape is generally categorized into U-shaped, V-shaped, and UV-shaped corrugations. U-shaped corrugations have good extensibility and elasticity, absorbing high energy. Within the elastic limit, they can return to their original shape after pressure is released, but due to the unstable focus points of the arc, their flat compression strength is not high. V-shaped corrugations have a smaller contact area with the paper surface, poor adhesion, and are more prone to peeling. With the combined effect of two diagonal lines, they provide good stiffness and have higher flat compression strength. However, if the external force exceeds their pressure-bearing limit, the corrugation is damaged and cannot return to its original shape after the pressure is removed. UV-shaped corrugations combine the advantages of the above two types, with higher compressive strength, good elasticity, and elasticity recovery ability, making them an ideal choice.

4. The cardboard layer design of the boxes is不合理.

Improper design of cardboard layers can lead to an increased rate of damage in outer packaging boxes. Therefore, the number of cardboard layers used in the boxes should be considered based on factors such as the weight, nature, stacking height, storage and transportation conditions, and storage time of the packaged goods.

5. The cardboard boxes have poor adhesive strength.

To determine if a cardboard box is properly glued, simply rip open the glued surface. If the original paper surface is damaged, it indicates a good bond. If you find no torn paper fibers or a white powder-like substance at the fluted bonding area, it's a false bond. This can result in reduced compressive strength of the box and affect its overall integrity. The bonding strength of the cardboard is related to the paper grade, adhesive composition, manufacturing equipment, and process operations.

6. The printing design of the cardboard boxes is不合理

The corrugated shape and structure of cardboard determine its compressive strength. Printing can cause some damage to cardboard, with the magnitude of pressure and the size of the bearing area being key factors affecting the compressive strength of the box. Excessive printing pressure can easily crush the corrugations, reducing the fluting height. Particularly when printing at crease lines, the forced, clear printing required can collapse the entire board, significantly lowering the box's compressive strength, so it's best to avoid printing here. When full-page or perimeter printing is done on boxes, in addition to the pressure roller's compression on the cardboard, the ink also wets the paper surface, further reducing the box's compressive strength. Generally, full printing on a box can reduce its compressive strength by about 40%.

7. The paper specifications for cardboard boxes are unreasonable and the paper used does not meet the requirements.

In the past, goods were primarily transported manually, with poor storage conditions and mainly in bulk form, thus tear and puncture resistance were the primary standards for assessing the strength of cardboard boxes. With the mechanization and containerization of transportation methods, the compressive strength and stacking strength of cardboard boxes have become the main performance indicators. When designing cardboard boxes, the compressive strength they can withstand is taken as a condition, and their stacking strength is also tested.

If the design process for the paper used in cardboard boxes does not consider the *low compressive strength, it can result in the paper not meeting the required compressive strength, leading to a high number of damaged boxes. There are clear specifications for the amount of paper used in each type of box, and it is stipulated that during paper changes, only higher specifications are allowed, not lower ones.

8. Impact on Transportation

Many reasons cause product damage during transportation, with improper handling or loading being common culprits. Even when packaging meets high protective standards, damage can still occur. The primary causes, aside from inadequate packaging design, are related to the choice of transportation tools and methods. The impact on the compressive strength of cardboard boxes by transportation is mainly due to shocks, vibrations, and bumps. Given the numerous stages in transportation, the cardboard boxes are subjected to significant shocks. Additionally, outdated transportation methods, along with rough handling and misuse by loaders, all contribute to the likelihood of damage.

9. Poor management of the distributor's warehouse

Due to the short performance shelf life of paper boxes, the compressive strength of corrugated boxes will gradually decrease as the storage time extends during circulation.

Additionally, the humidity in the warehouse environment greatly affects the strength of cardboard boxes. Cardboard boxes have the function of expelling and absorbing moisture from the environment. With a high relative humidity in the warehouse, the strength of corrugated boxes will drop sharply.

Retailers often stack products too high due to limited storage space, with some even stacking goods to the roof, which greatly affects the strength of the cardboard boxes. If the cardboard box's compressive strength is high according to standard testing methods, adding 70% static load will cause the box to collapse; with 60% static load, the box can withstand three weeks; with 50% static load, it can last for ten weeks; and with 40% static load, it can last for over a year. This illustrates that excessive stacking is fatal to the cardboard boxes.