Global Logistics Test Report for French Fried Boxes: 40 Day Strength Retention Rate for Ocean Freight

In the global food supply chain, as a typical representative of fragile packaging, the strength retention rate of french fried boxes during sea transportation directly affects product safety and market trust. This report is based on the characteristics of the shipping environment and packaging materials, combined with industry data and test cases, to analyze the changes in compressive strength of french fried boxes during a 40 day shipping cycle.

1、 The core influencing factors of shipping environment on packaging strength

Humidity erosion: The humidity inside the sea freight hold often reaches 70% -90%, and the compressive strength of cardboard boxes decreases exponentially with increasing humidity. Data shows that when the humidity reaches 70%, the compressive strength loss of ordinary corrugated cardboard boxes can reach 40%; If moisture-proof measures are not taken, a 40 day high humidity environment may result in a strength attenuation of over 60%.

Stacking pressure: The goods inside the container are usually stacked in a staggered manner, and the bottom cardboard box needs to bear the total weight of the upper layer of goods. Taking a 20 foot container as an example, when fully loaded, the bottom cardboard box needs to withstand a sustained pressure of about 2 tons, far exceeding the static bearing limit of ordinary french fried boxes.

Transportation vibration: The frequency of sea transportation vibration is concentrated between 2-50Hz, which can easily cause fatigue damage to packaging materials. Tests have shown that continuous vibration can reduce the edge compression strength of cardboard boxes by 15% -25%.

2、 40 day strength retention rate measured data

A multinational food company conducted sea freight testing on its exported french fried boxes:

Test group: Using three-layer B-corrugated cardboard boxes, moisture-proof coatings, and desiccant packaging

Control group: ordinary three-layer B-corrugated cardboard box

Test results:

Initial compressive strength of group (kg), compressive strength after 40 days (kg), strength retention rate

Test group 120 98 81.7%

Control group 120 52 43.3%

The testing group increased the strength retention rate to 81.7% through a composite protective system, while the control group had a strength attenuation rate as high as 56.7% due to the lack of moisture-proof measures.

3、 Industry solutions and optimization suggestions

Material upgrade: Using high moisture strength corrugated paper (such as kraft paper with moisture strength agent), its water absorption rate is reduced by 40% -50% compared to ordinary paper.

Structural optimization: Adding angular support structure to the box can improve stacking stability by more than 30%.

Dynamic monitoring: Deploy IoT humidity sensors to provide real-time feedback on cabin environment data, providing a basis for remedial measures.

Insurance factor design: Referring to the ocean shipping packaging standards, it is recommended to set the insurance factor K value to 3-4 (humid environment) or 2.5-3 (dry environment) to cover transportation risks.

Zhejiang Dongou Printing Industry Co.,Ltd, the expert in French fried box production