Best Strapping for Export: Cord Straps, Buckles & PET Seals

Export customers care less about your product brochure and more about one thing: whether their cargo arrives intact. Containers see vibration, shock, shifting loads, pier-side rework, and customs checks. A weak strap or a bad joint can turn a profitable shipment into a claim, a penalty, or a lost customer. Modern cord straps, buckles, and PET seals give you a way to upgrade containment without overengineering or overspending. In this guide, you will see how each option behaves in real export conditions, how to combine them into a reliable system, and how to choose the right configuration for your lanes and loads.

Why export strapping is different?

Exports expose your packs to conditions that regular domestic shipping rarely reaches.

• Multiple handling points: factory, local transporter, CFS, port, vessel, destination port, inland leg 
• Long static periods under tension, often in hot, humid, and salty environments 
• Dynamic forces from sea swell, hard braking, shunting, or rough roads 

The result is simple: you do not just need high break strength on paper.
You need straps and joints that keep tension and integrity over weeks of stress.

Main strapping options for export

Most export packers still decide between four materials.

• Steel strapping 
• Polypropylene (PP) strapping 
• Polyester (PET) strapping 
• High‑tenacity polyester cord straps 

Patterns across large user bases show a clear trend: steel and PP are losing share to PET and cord.
The reason is not fashion; it is the mix of strength, safety, cost, and recyclability that PET and cord deliver in real operations.

Cord straps for heavy and irregular loads

What cord straps are?

Cord straps are made from bundles of high‑tenacity polyester yarns in woven, composite, or hot‑melt constructions.
They come in widths typically from about 13 mm up to 40 mm and above, with break strengths that match or exceed many steel sizes used in export lashing.

Why exporters use them?

Cord straps are especially useful when you deal with:

• Irregular machinery, project cargo, or mixed pallets 
• Container lashing inside 20 ft and 40 ft boxes 
• Rail and road movements with strong shock loads 

They absorb shock better than many rigid straps and do not snap into dangerous edges when cut.
They also resist moisture and many chemicals, which helps when containers sit in coastal yards or open sun.

PET strapping for pallets and bundles

PET vs PP vs steel

Polyester (PET) strapping is an extruded plastic strap with higher tensile strength and lower creep than PP, and lower injury risk than steel.
It holds tension better over time, especially on compressed loads like cartons, bricks, or bottles.

Where PET works best

PET strapping is a good choice when:

• Loads are fairly regular and uniform 
• You want to use semi‑automatic or automatic strapping machines 
• Pallets are stacked in high bay racking or double stacked in containers 

In many studies of palletized export loads, PET often maintains system tension better than PP by a double‑digit margin over long dwell times.
At the same time, PET avoids the rust, sharp edges, and tool wear associated with steel.

Buckles and PET seals as your “lock”

Buckles for cord straps

Cord straps usually work with steel wire buckles that provide a friction‑based, self‑locking joint.
Surface treatments and specific geometries increase friction and help the joint reach a high percentage of the strap’s break strength.

This matters because many real‑world failures happen at the joint, not in the strap body.
A correctly selected and tensioned buckle can make the usable system strength much closer to the rated strength on the datasheet.

PET seals for plastic strapping

PET strapping is usually secured with open, closed, or serrated metal seals, or with friction welds from battery tools.
Serrated seals and controlled welds often deliver higher joint efficiency, especially on higher‑tension export loads.

A pattern in field audits is that poorly matched seal size or type can cut actual joint strength by 30–40% compared to the strap’s nominal rating.
That gap explains why some exporters face failures even when they think they are using “strong enough” strap.

Cord + buckle vs PET + seal

Both systems can work in export; the key is matching them to the job.

• Use cord + buckle when you lash heavy machinery, timber, steel coils, drums, or bulk bags inside containers or on flat racks 
• Use PET + seal (or weld) when you strap stable pallets, bricks, cartons, or products on automated lines 

Cord systems handle dynamic and diagonal lashing better, while PET systems shine in repetitive, standardized pallet work.
Surprisingly, many sites still use steel on tasks where PET or cord could meet the technical need with fewer injuries and lower tool maintenance.

Choosing the right export strapping

Step 1: define the load and route

List the basic facts first:

• Load weight, dimensions, and center of gravity 
• Type of packaging (cartons, drums, crates, bags, loose machinery) 
• Route legs: road, rail, sea, storage duration 

Loads on combined road–sea routes see different stress patterns than purely domestic shipments, especially in long‑distance sea freight.
Mapping this upfront prevents under‑ or over‑specification.

Step 2: select strap, joint, and tool as a set

Think in terms of a system:

• Strap: PET or cord, width and break strength 
• Joint: buckle or seal type, joint efficiency 
• Tool: manual, pneumatic, or battery, with enough tension capacity 

Many investigations after incidents show a consistent pattern: the strap itself was adequate, but the joint or tool use was not.
Treating all three as a matched set closes that gap and brings field performance closer to lab ratings.

Step 3: check compliance and documentation

Global customers and insurers are increasingly asking for documented load‑restraint methods and proof of testing.
Aligning your method with recognized guidelines and keeping test certificates on file can reduce disputes and speed up claims handling.

Common questions on export strapping

Q: How many straps or lashings do I really need?

A: The count depends on load weight, friction, and direction of forces, not just a rule of thumb.
A practical approach is to start from calculated restraint needs and then validate with controlled transport tests instead of relying only on tradition.

Q: Is switching from steel to PET or cord risky?

A: It is only risky if you treat it as a direct one‑to‑one swap without re‑doing joint and layout design.
Where exporters review load paths and redesign the system, PET and cord often match or exceed steel performance while cutting injuries and damage from rust.

Q: Do I need automation to benefit from PET?

A: No.
Manual and battery tools can deliver strong PET joints on lower volumes, though automation improves consistency and speed once throughput crosses a certain threshold.

Conclusion and next step

Export packaging is not the place for guesswork.
When you match cord straps, buckles, PET straps, and seals correctly, you reduce damage, claims, and rework across entire trade lanes.

At Amass‑Strap, the promise is simple: export‑ready strapping systems where straps, buckles, seals, and tools are designed to work together, tested on real‑world loads, and supported by practical guidance at your site.
If you want to benchmark your current export strapping against a system engineered for your lanes and cargo, reach out to Amass‑Strap today and request a load‑specific strapping proposal.