Air freight has a pricing structure that punishes volume. Carriers charge by volumetric weight when the package size exceeds a certain threshold relative to its actual weight, which means a light but bulky package costs as much as a heavy one. For retailers shipping by air, the packaging material affects the billable weight as directly as the product does.
Bubble wrap adds volume because it protects with trapped air. The material is made from high-pressure polyethylene, extruded with additives at around 230 degrees Celsius, then vacuum-formed into a sheet of sealed pockets. The air inside those pockets is the protection mechanism, and it is also the reason the material takes up more space than the film alone. A product wrapped in bubble wrap becomes larger than the product itself, and that extra volume is measured by the carrier.
The volume problem is worse for irregular products. Bubble wrap does not conform closely to complex shapes, so the operator builds up layers and tapes the seams. Overlapping sheets and taped seams add further volume, and the resulting package is larger than the product requires. On a short domestic route, that difference might be absorbed. On a long air freight route, it shows up in every shipment.
Paper cushioning behaves differently. A paper bubble machine presses specialty kraft paper into a three-dimensional bubble structure through mechanical embossing, with no inflation, heating, sealing, or adhesive involved. The finished material conforms to the shape of the item rather than sitting flat against it, which holds the product in place without the layers of overlap that bubble wrap requires. The package can be closer to the product size, which reduces the billable volume.
The storage dimension reinforces the same point. Bubble wrap stores air as well as film, which means the warehouse is holding volume that will later be billed. Paper cushioning stores as flat paper, which is dense, and the cushioning structure is created at the point of use rather than shipped in finished form. The volume is created when it is needed, not stored and moved in advance.
Aircosan manufactures paper bubble machines at its own facility in Foshan, Guangdong, and builds units up to 80cm wide. The machines accept single-layer specialty kraft paper in the 70 to 140 gsm range, with heavier grades up to 160 gsm on the high-volume model. The forming pressure adjusts automatically based on the actual paper thickness, so the cushioning structure stays consistent across rolls and suppliers.
For retailers shipping by air, the packaging decision is a freight decision. The material that protects the product without inflating the package is the material that keeps the billable weight under control, and paper cushioning conforms to the product rather than building up around it.