In daily use, the sealing performance of lunch boxes is the focus of many consumers, especially when you need to carry soup or food with sauce, liquid leakage may cause a lot of trouble.
Sealing design of PP lunch boxes
Silicone sealing ring
The silicone sealing ring is soft and elastic, and can fit tightly to the edge of the box body to effectively prevent liquid leakage.
Multi-lock design
Many PP lunch boxes use a four-lock or double-lock design to ensure that the lid and the box body are tightly combined through multi-point fixation.
Edge reinforcement
Some PP lunch boxes use a thickened edge design at the connection between the lid and the box body to further enhance the sealing effect and prevent liquid from leaking from the gap.
Leakage-proof performance test of PP lunch boxes
Inverted test: Invert the lunch box filled with liquid for 24 hours to observe whether there is leakage.
Vibration test: simulate vibration during carrying to check whether the sealing performance is stable.
Temperature test: test the performance of the sealing ring under high or low temperature environment to ensure effective leakage prevention under different conditions.
Other advantages of PP lunch box
In addition to leak-proof performance, PP lunch box has the following advantages:
Safe material: food-grade PP material, BPA-free, microwaveable.
Lightweight and durable: light weight, easy to carry, and not easy to break.
Easy to clean: smooth surface, not easy to leave stains, support dishwasher cleaning.
If you need a lunch box with good leak-proof performance, you can choose the products of Youming lunch box factory, whose high-quality sealing design and strict testing standards ensure that your eating experience is more secure and convenient.
