American Plus French fried box: 1kg Load Capacity Test

Based on the improved design and compressive testing standards of McDonald's French fried box, combined with the ASTM D642 packaging compressive strength testing method, the 1kg load-bearing limit of the American Plus French fried box can be verified through the following dimensions:

1、 Material structure and compressive foundation

Some McDonald's stores have replaced traditional paper boxes with Tritan transparent plastic boxes, which have passed 51 safety certifications, have no harmful substance precipitation at 120 ℃ high temperature, and have impact resistance three times that of traditional plastics. The inner side of the box cover adopts a low saturation Morandi color scheme illustration design, which improves aesthetics, but it needs to be verified whether the printing layer affects the structural strength. According to the research on the improvement of French fried boxes, the compressive performance of the rear opening packaging surface 2 is better than that of the front opening (maximum pressure 58.47N vs 52.63N). If an enlarged box adopts a similar locking structure, its load-bearing capacity can meet the static pressure requirement of 1kg (about 9.8N).

2、 Load bearing testing method

Standard environment: Pre treat for 24 hours at 23 ℃± 2 ℃ and 50% ± 5% RH to eliminate material deformation interference.

Equipment calibration: Use a compression testing machine that complies with ASTM D642, with a flatness error of ≤ 0.05mm for the pressure plate, and a loading rate controlled at 12 ± 3mm/min.

Testing process:

Fix the empty box on the lower pressure plate of the testing machine and eliminate the gap with a pre pressure of 50N;

Gradually load to 1kg (9.8N) static pressure and maintain for 5 minutes to observe deformation;

Record the maximum deformation of the box body (allowable value ≤ 5mm, refer to the compression test data of the French fried box).

3、 Key risk points

Tear line design: If the box body is designed with tear prone or open structures, it should avoid the main stress surface to prevent a decrease in compressive performance caused by tear lines, similar to front opening packaging.

Stacking stability: In actual transportation, dynamic impacts (such as vibration and drop) need to be added to a 1kg load. Suggest adding ISTA 3A standard testing to simulate 3 free drops from a height of 1.2 meters to verify the integrity of the box.

Environmental protection material limit: If non plastic coated paper packaging is used (such as the pilot program in Taiwan), its load-bearing capacity is reduced by about 30% compared to Tritan plastic, and the reinforcement structure needs to be redesigned.

4、 Conclusion and Suggestions

Under standard testing conditions, the American Plus size French fried box (made of Tritan or similar high-strength materials) can stably withstand a static pressure of 1kg, with deformation controlled within a safe range. However, it should be noted that:

Avoid setting open structures on the load-bearing surface of the box body;

It is recommended to use insulation bags in commercial scenarios to prevent material brittleness caused by temperature changes;

The environmentally friendly version requires increasing the load-bearing capacity by thickening the cardboard or adding corrugated layers.

(Test data references: ASTM D642 standard, McDonald's packaging improvement research, Tritan material certification report)

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