Correlation Analysis Between the Drop Resistance of Flat Bottom Pouches and Their Contents
The drop resistance of flat bottom pouches (e.g. 8-side seal pouches) is closely linked to both the packaging material strength and the physical properties of the contents. The following two content characteristics most significantly affect drop resistance:
1. Relative Flow of the Contents
High-flow contents (like powders or particles) lose less internal friction energy during a fall, causing the impact to focus on the seal area. For instance, in a flat bottom pouch filled with soy powder, the powder's high flowability without an inner gusset increases impact on the seal, while an inner gusset helps restrict movement, reducing seal rupture risk.
The multi-layer seal structure enhances impact resistance and an inner gusset helps to disperse pressure from flowing contents.
2. Relative Density (Weight) of the Contents
High-density contents (e.g., pet food, nuts) require smaller pouch sizes, limiting deformation space during a fall, reducing energy absorption, and lowering drop resistance.
Low-density contents (e.g., puffed snacks, dehydrated vegetables) have larger volumes, allowing the pouch to deform more during a fall, absorbing more impact energy through stretching. For example, a flat bottom pouch filled with puffed snacks typically has better drop resistance than one filled with pet food.
