PET Strap Technology: The Modern Alternative to Steel Strapping

Why Industries Are Moving Away from Steel

For decades, steel strapping was the default choice for heavy-duty load securing. It was strong, rigid, and familiar. But steel strapping comes with inherent problems: sharp edges that cause injuries, snap-back hazards when cut under tension, rust that contaminates products, and heavy coils that are difficult to handle. As industries look for safer, lighter, and more cost-effective solutions, PET strap (polyester strap) has emerged as the modern alternative.

PET strap technology combines high tensile strength with low elongation and excellent tension retention. According to industry analysis, polyester strapping can replace steel in most heavy-duty applications while reducing total packaging costs by 30–50%. In metal processing, steel coil bundling, cotton bale packaging, and construction material bundling, PET strap is steadily replacing steel.

At Jushuo Packaging, our production data shows that PET strap accounts for a growing share of heavy-duty strapping applications across global markets. This article explains the technology behind PET strap, how it compares with steel, and why the switch makes sense for many operations.

1. The Technology Behind PET Strap

1.1 Material Composition

PET strap is manufactured from polyethylene terephthalate—the same polymer used in beverage bottles and synthetic fibers. According to material science data, PET offers a unique combination of properties: high tensile strength, low moisture absorption, excellent dimensional stability, and resistance to UV degradation.

The raw material is produced through polymerization, then processed into strapping through extrusion and stretching.

1.2 Manufacturing Process

According to patent literature on strapping manufacturing, PET strap is produced by extruding molten PET resin into a flat band, cooling it, and then stretching it under controlled conditions. The stretching process—cold drawing—aligns the polymer molecules along the strap's length, increasing tensile strength and reducing elongation.

This multi-stage process produces strapping with tensile strength up to 600 N/mm²—approaching steel's performance at a fraction of the weight.

1.3 Mechanical Properties

According to industry testing data, PET strap delivers:

These properties make PET strap suitable for demanding applications that previously required steel.

2. PET Strap vs Steel Strapping

2.1 Strength and Load Capacity

The most common question about PET strap is whether it can match steel's strength. According to material specifications, PET strap offers tensile strength of 450–600 N/mm² compared to steel's 800–1,100+ N/mm². While steel has higher maximum strength, PET's strength range is sufficient for most heavy-duty applications.

According to industry analysis, PET strap can replace steel in applications where loads are under 2,000 kg or where edge protection is practical.

2.2 Tension Retention

PET strap significantly 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 is particularly valuable for long-distance shipments, multi-modal transport, and loads that compress or settle during transit.

2.3 Safety and Handling

Steel strapping presents significant safety hazards that PET strap eliminates:

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

2.4 Environmental Resistance

For industries handling galvanized or color-coated products, PET strap's non-corrosive properties protect product surfaces.

3. Cost Analysis

3.1 Material and Operational Costs

According to industry analysis, PET strap provides approximately four times the linear footage per ton compared to steel, fundamentally changing the cost equation.

3.2 Total Cost of Ownership

Beyond material cost, PET strap reduces operational expenses through:

• Lower shipping weight

• Easier handling and reduced labor

• Less equipment wear and maintenance

• Fewer safety incidents

• No rust-related product damage

4. Industry Applications

4.1 Steel Coil Bundling

PET strap is widely used for steel coil bundling, particularly for galvanized and color-coated coils where rust contamination is a concern. With proper edge protection, PET strap handles coils up to 2,000 kg.

4.2 Cotton Bale Packaging

According to JCIBPC specifications, PET strapping is the preferred material for cotton bales because it is rust-free and meets the required break force standards.

4.3 Construction Materials

Brick, stone, and lumber bundling benefit from PET strap's UV resistance and tension retention, particularly for outdoor storage.

4.4 Export Shipments

PET strap's superior tension retention and environmental resistance make it ideal for long-distance export shipments.

Summary

PET strap (polyester strap) has become the modern alternative to steel strapping across industries. It offers tensile strength up to 600 N/mm², superior tension retention, rust-free performance, and significant safety advantages—all at 30–50% lower total cost of ownership.

Steel strapping retains advantages for extreme loads (over 2,500 kg) and applications requiring maximum rigidity. For the majority of heavy-duty packaging applications, PET strap delivers better total value when considering material costs, safety, equipment wear, and operational efficiency.

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.