Can PET Strap Replace Steel Strapping Completely?

The Replacement Question

For decades, steel strapping was the default choice for heavy-duty load securing. It was strong, rigid, and familiar. But steel strapping carries inherent drawbacks: it rusts, it has sharp edges that cause injuries, it is heavy to handle, and it creates snap-back hazards when cut under tension. These drawbacks have driven industries to look for alternatives, and PET strap (polyester strap) has emerged as the leading replacement candidate.

The question many procurement and packaging engineers now ask is straightforward: can PET strap replace steel strapping completely? The answer requires nuance. In most applications—steel coils, cotton bales, brick pallets, lumber bundles, and export shipments—PET strap can and does replace steel. But in certain extreme applications, steel retains advantages that PET cannot fully match.

At Jushuo Packaging, our production data shows that PET strap has replaced steel in the majority of heavy-duty packaging applications across global markets. This article examines where PET strap succeeds, where steel remains necessary, and how to evaluate whether the switch is right for your operation.

1. Where PET Strap Successfully Replaces Steel

1.1 Tensile Strength

PET strap achieves tensile strength of 450–600 N/mm², approaching steel's 800–1,100+ N/mm². While steel has a higher maximum, PET's strength range covers the majority of industrial packaging applications.

For loads under 2,000 kg, PET strap provides adequate strength with a larger safety margin when specifications are matched correctly.

1.2 Tension Retention

PET strap outperforms steel in tension retention. According to industry data, steel strapping has almost no elasticity—once it stretches or loosens, it stays loose. PET strap's elastic recovery allows it to compensate for load settling and maintain constant tension throughout transit.

This property makes PET strap superior for long-distance shipments, multi-modal transport, and loads that settle during transit.

1.3 Rust-Free Performance

PET strap does not rust. This eliminates a major drawback of steel strapping—rust contamination that downgrades product quality. For industries handling galvanized, color-coated, or surface-critical products, PET strap's rust-free performance provides a decisive advantage.

1.4 Safety and Handling

Steel strapping presents significant safety hazards that PET strap eliminates:

According to safety analysis, PET strap's smooth edges and reduced recoil energy offer a significant safety upgrade over steel, reducing injury claims and workers' compensation costs.

1.5 Cost

PET strap provides 30–50% lower total cost of ownership compared to steel. According to industry analysis, PET strap offers approximately four times the linear footage per ton, fundamentally changing the cost equation. Lower shipping weight, easier handling, and reduced equipment wear add to the savings.

2. Where Steel Strapping Retains Advantages

2.1 Extreme Loads (Over 2,500 kg)

For loads exceeding 2,500 kg, steel strapping's higher maximum tensile strength remains necessary. Steel coils weighing several tons, heavy machinery, and oversized industrial loads may require the additional strength that only steel provides.

2.2 Maximum Rigidity Requirements

Some applications require strapping that does not stretch at all. Steel's near-zero elasticity maintains maximum compression on loads that must not shift. Cold-rolled steel coils requiring maximum compression are one example.

2.3 Small Inner Diameter Coils

Steel strapping's rigidity prevents telescoping in small inner diameter coils. For coils that must maintain their shape during handling and transport, steel remains the better choice.

2.4 Static Loads in Dry Environments

In dry environments where rust risk is minimal, steel strapping's strength and low cost per application may be advantageous for certain static loads. However, even in these applications, PET strap's safety and handling advantages often outweigh the cost difference.

3. Application-by-Application Analysis

4. How to Evaluate the Switch

4.1 Assess Load Requirements

The first step is understanding your actual load requirements. According to packaging engineering best practices:

• What is the maximum load weight?

• What are the load dimensions and edge conditions?

• What is the transit distance and duration?

• What are the storage conditions?

4.2 Test PET Strap in Your Application

According to quality best practices, sample testing verifies performance before full conversion:

1. Request PET strap samples in the appropriate specification

2. Test feed and seal performance in your equipment

3. Evaluate tension retention under actual load conditions

4. Compare cost per application, not just material cost

4.3 Consider Equipment Compatibility

PET strap is compatible with most modern automatic strapping equipment. According to equipment manufacturers, PET typically requires less maintenance than steel, with reduced wear on feed wheels and less frequent parts replacement.

At Jushuo Packaging, our technical team assists clients with equipment compatibility verification and transition planning from steel to PET.

5. The Transition Process

5.1 Phased Conversion

According to packaging best practices, a phased approach reduces risk:

• Start with applications where PET's advantages are clearest

• Test performance and adjust specifications as needed

• Expand to additional applications as confidence grows

5.2 Total Cost Comparison

At Jushuo Packaging, we support clients through the conversion process with documented quality assurance and application guidance.

Summary

PET strap (polyester strap) can replace steel strapping in the majority of heavy-duty packaging applications. It offers tensile strength of 450–600 N/mm², superior tension retention, rust-free performance, and significant safety advantages—all at 30–50% lower total cost of ownership.

However, PET strap cannot replace steel completely. Steel retains advantages for loads exceeding 2,500 kg, applications requiring maximum rigidity, small inner diameter coils, and certain static loads in dry environments.

For buyers, the practical approach is straightforward: assess load requirements, test PET strap in your actual application, and consider a phased conversion. For most industrial packaging applications, PET strap provides better total value.

Jushuo Packaging stands as your trusted PET strap manufacturer, delivering superior quality plastic strapping solutions backed by over a decade of specialized expertise. Our state-of-the-art 15,000㎡ manufacturing facility utilizes advanced production technology to produce high-performance PET strapping with 99% pass rates. With annual production capacity exceeding 20,000 tons, we ensure reliable supply chains and competitive pricing for bulk orders. If you need assistance evaluating PET strap as a steel replacement for your application, please send an email to sales@jushuopackaging.com, and our professional team will provide one-on-one support.

References

1. European Committee for Standardization. "EN 13394:2001 – Packaging – Strapping – Specifications for Polyester Strapping." CEN.eu, 2001.

2. ASTM International. "ASTM D3950 – Standard Specification for Strapping, Flat Steel and Seals." ASTM.org, 2021.

3. PAC Strapping Products. "High-Performance Polyester Strapping." Plant Engineering, 2024.

4. Signode Industrial Group. "PET vs PP: Which Strap to Use?" Signode.com, 2025.