A batch of sealing film may pass all tests domestically, but whether it arrives intact at the customer's location after being loaded into a container depends on how well the packaging and transport phases are handled. Export shipping differs from domestic transport — it takes longer, involves more complex environments, and leaves less room for error. Based on product characteristics and export experience, Leadtra Packaging has identified several key points.

Inner packaging: moisture protection is the top priority

Although the aluminum foil core material of sealing film has good barrier properties, humidity inside a shipping container during ocean freight can reach over 95%, with temperatures swinging from 40°C near the equator to -10°C in colder regions. In such conditions, the heat-seal layer (e.g., PE) and paperboard layers of the sealing film are prone to moisture absorption, leading to performance degradation. Each roll should be sealed in an aluminum foil bag with desiccant, and an additional moisture barrier film should be placed inside the outer carton for double protection.

Outer packaging: cartons must withstand stacking

Export cartons are typically stacked on pallets, with stacking heights reaching 2-3 meters. The cartons must have sufficient compressive strength; otherwise, the bottom cartons will deform, potentially squeezing the film rolls inside and affecting roll end flatness. All carton edges should be securely sealed with tape in an H-pattern to prevent them from coming apart during handling. An additional layer of heat-shrink or stretch film can be applied outside the cartons for water and dust protection, and to prevent the cartons from softening due to moisture during transit.

Palletizing and securing: don't let cargo "move around" inside the container

Goods should be stacked neatly on pallets and secured with stretch film or strapping to prevent shifting during forklift handling and transport vibrations. The pallets themselves must be sturdy, with no cracks or insect damage. If the cargo doesn't completely fill the pallet, a separator or filler should be added on top to prevent the weight of upper layers from pressing directly onto the film rolls.

Labels and documentation: ensure smooth customs clearance

Outer cartons should be clearly labeled with icons such as "Keep Dry," "Handle with Care," and "Do Not Invert" to help logistics personnel identify and handle them properly. Export-related documents, such as packing lists, invoices, and product descriptions, should accompany the shipment for smooth customs clearance at the destination. If the sealing film is used for food or pharmaceutical packaging, relevant certification documents should also be provided.

Different destinations, shipping methods, and seasons may require different packaging approaches. If you're unsure about the most reliable packaging for your products, you can send your order information and samples to Leadtra Packaging. We'll help evaluate and design an appropriate export packaging solution for you.