Double layer air column bag
1. Overview | The Next-Generation Protective Packaging
The Air-Bag-in-Bag is a dual-layer suspension air cushion packaging system designed for high-value, fragile, and irregularly shaped goods. Unlike traditional loose-fill packaging, this system creates a “floating suspended state” inside the outer carton, effectively converting impact energy into air compression energy to protect products during complex logistics transits—especially for sea freight and cross-border e-commerce.
2. How It Works | The “Airbag” Mechanism
Inner Layer (Tight Fixation): The inner bag wraps closely around the product’s contour, securing it in the dead center of the packaging.
Outer Layer (Energy Absorption): The pre-sealed air chambers between the inner and outer layers inflate to form a resilient air cushion.
The Physics: Upon impact, the compressed air extends the deceleration time, absorbing up to 90%+ of shock forces, while the inner layer prevents direct hard-contact scratches.
3. Ideal Applications
Ceramics & Porcelain: Vases, sanitary ware, collectible figurines.
Electronics: Industrial PCBs, servers, precision sensors, LED displays.
Glassware: Wine bottles, mirror panels, lab glass equipment.
Fresh Produce: Premium fruits (e.g., grapes, figs, avocados) requiring suspended cushioning to avoid bruising.
Auto Parts: Painted surfaces or polished metal components.
4. Critical Usage Tip for Best Performance
⚠️ Clearance Rule: After placing the product into the inner bag, ensure there is a minimum 5 cm (2 inches) gap between the product’s edges and the outer sealing line. This clearance is mandatory to form a complete air-suspension zone. If the product touches the bag wall, the cushioning effect will be significantly compromised.
Inflation Instructions: Cosmetic inflatable shipping bag
Follow these steps to achieve optimal suspension protection.
Step 1: Prepare Your Equipment
Inflation tool: Standard air gun (shop air) or tabletop inflator with pressure regulator.
Air source: Clean, dry compressed air.
Pressure setting: Regulate to 0.06 – 0.08 MPa (approx. 8 – 12 psi).
⚠️ Do not exceed 0.1 MPa – over-inflation may cause bag burst or product deformation
Step 2: Insert the Product
Place your product fully into the inner bag.
Ensure the product sits centered, not tilted or touching the side seals.
Critical clearance check: Measure at least 5 cm (2 inches) of space between the product’s edges and the outer sealing line on all sides.
➡️ No clearance = no suspension effect.
Step 3: Inflate the Air Chambers
Insert the air gun nozzle into the inflation valve (usually a one-way self-sealing port on the outer bag).
Trigger the air gun and inflate until the outer bag becomes firm but not rock-hard.
Visual check: The outer chambers should expand evenly, lifting the inner bag and product into a floating center position.
Remove the nozzle quickly – the one-way valve will automatically seal.
Step 4: Seal & Pack
Fold the top flap of the outer bag over the inflated cushion (if designed with a self-locking flap) or simply place the entire inflated unit into your shipping carton.
No additional void fill needed – the inflated bag fits snugly inside the carton.
Cosmetic inflatable shipping bag details display
Double layer air column bag Size Display
Air-Bag-in-Bag: Size Selection & Calculation Guide
Choosing the right size is critical for effective suspension protection. This guide covers the two key decisions: air column width (cushioning strength) and bag dimensions (product fit).
1：Calculate Bag Dimensions (Length & Width)
Unlike standard dunnage bags used for cargo bracing, the bag-in-bag system requires the product to be fully enveloped and suspended. The calculation follows a simple formula:
Minimum Bag Size = Product Size + Clearance (5 cm on ALL sides)
Step-by-Step Calculation:
Dimension Formula Example
Bag Length Product Length + (5 cm × 2) + valve allowance Product 20 cm → Bag ≥ 30 cm + valve space
Bag Width Product Width/Circumference + (5 cm × 2) + fold allowance Product 15 cm wide → Bag ≥ 25 cm
2：Critical Rule:
The product must sit centered with at least 5 cm (2 inches) clearance between the product’s edges and the outer bag seal on all sides. This clearance is mandatory to form a proper air-suspension zone. If the product touches the bag wall, the suspension effect is lost.
3：For Cylindrical Products (e.g., bottles):
Measure the diameter and height of the product.
The bag’s internal circumference must accommodate the product diameter plus 10 cm total clearance.
For example, a wine bottle with 8.5 cm diameter would typically use a bag with 8 columns (approx. 13 cm internal diameter).
For Irregular Shapes:
Measure the maximum length, width, and height of the product.
Use the largest dimension to determine the bag size.
Consider custom-made bags for complex shapes.
4. Quick Selection Checklist
Weighed your product – choose column width from the table above
Measured product dimensions (L × W × H or Diameter × Height)
Added 5 cm clearance on all sides for suspension effect
Considered shipping environment (sea freight requires stronger cushioning than air freight)
Decided between pre-made bags or roll film