How does the square bottom of a block bottom airsickness bag enhance the stability of the bag and prevent tipping or leakage in a mobile environment?

The design and manufacture of the square bottom of a block bottom airsickness bag is critical to improving the stability of a block bottom airsickness bag in a mobile environment. The square bottom is inherently more resistant to tipping than a conical or round bottom by providing a larger contact area, but needs to be further improved to cope with severe vibration or bumps. The key strategy is to strengthen the rigid structure of the square bottom.

This can be achieved by using a multi-layer thickening design on the bag bottom, such as using a high-density polyethylene substrate combined with a tough composite paper-plastic material, and performing additional heat pressing or ultrasonic pressing on the four inner corner areas of the square bottom to form a strong inner fold line structure. These inner fold lines are like a skeleton, which can effectively prevent the bottom from collapsing or twisting due to the weight of the contents or external extrusion, and keep the bottom flat and stable.

In addition, the edge of the square bottom is designed to be wider and thicker (usually 10-15mm hot-pressed edge sealing is used), and the edge sealing is ensured to be tight and seamless, which not only improves the edge load-bearing support and prevents the edge from curling and failing, but also greatly reduces the risk of liquid leakage caused by weak stitching or bonding. In a moving car, airplane or ship, this reinforced square bottom vomit bag can "sit" firmly in the seat back pocket, armrest cup holder or passenger's hand, and is not easy to overturn and roll.

At the same time, the connection between the bag body and the square bottom adopts one-piece molding or seamless heat sealing technology to further enhance the integrity and prevent the bottom from tearing and falling off when stressed. Therefore, the carefully optimized block bottom airsickness bag, with its rigid square chassis and firm edge structure, has become a reliable and non-leaking hygienic container in mobile scenes.