What Thickness Options Does PET Strap Offer?

The Thickness Question

When sourcing PET strap (polyester strap) for heavy-duty packaging, buyers quickly discover that thickness is one of the most important specifications. Unlike PP strap, which maxes out around 0.80mm, PET strap is manufactured in a broader thickness range to handle heavier loads—from general palletizing to steel coil bundling and cotton bale packaging.

Thickness determines break strength, tension retention, and equipment compatibility. A strap that is too thin for the load will fail under tension; a strap that is unnecessarily thick adds material cost without benefit. At Jushuo Packaging, our production data shows that thickness optimization is one of the most effective ways to balance load security with packaging cost.

1. Standard Thickness Range for PET Strap

1.1 The Full Range

According to industry specifications, PET strap is manufactured in thicknesses from 0.4mm to 1.25mm. The most commonly stocked thicknesses are 0.5mm, 0.6mm, 0.8mm, 1.0mm, and 1.2mm.

1.2 How Thickness Is Determined

According to manufacturing specifications, PET strap thickness is determined by the extrusion die gap and the draw ratio applied during stretching. The multi-stage stretching process—first stretching at a draw ratio of 4–9, followed by surface treatment and second stretching—allows manufacturers to achieve precise thickness control.

Higher draw ratios produce thinner, stronger strap per unit of material. Lower draw ratios produce thicker strap. Manufacturers balance these variables to produce the thickness grades that match market demand.

1.3 Thickness Tolerance

According to EN 13394 specifications, PET strap thickness is manufactured to a tolerance of approximately ±0.02mm. This tolerance is critical for automatic strapping machines, which require consistent thickness to feed and seal reliably. At Jushuo Packaging, our machine-grade PET strap is produced to tight thickness tolerances to ensure reliable performance in automated equipment.

2. How Thickness Affects Performance

2.1 Break Strength

Thickness is a direct contributor to break strength. For the same width, a thicker strap has more cross-sectional area and therefore higher break force.

According to product specifications, increasing thickness from 0.5mm to 0.8mm at the same width can increase break force by 70–80%.

2.2 Tension Retention

Thickness affects tension retention behavior. According to industry analysis, thicker PET straps have lower elongation at break and maintain tension more consistently under sustained load. This property is particularly valuable for long-distance shipments and loads that settle during transit.

2.3 Seal Performance

Thickness affects how the strap behaves during friction welding or heat sealing. According to equipment manufacturers, thicker straps require more pressure and longer cycle times to achieve a proper seal. Machines must be calibrated to match the strap thickness being used.

2.4 Machine Feeding

Thickness tolerance and consistency affect feed reliability. According to equipment specifications, automatic strapping machines are designed to accept a specific thickness range. Using strap outside this range causes misfeeds, jams, and seal failures.

3. Thickness Selection by Application

3.1 Light-Duty Applications

For standard palletizing and general packaging:

These applications prioritize cost efficiency while maintaining adequate load security.

3.2 Medium-Duty Applications

For medium to heavy pallets and industrial loads:

This is the most common specification range for general industrial packaging operations.

3.3 Heavy-Duty Applications

For steel coils, bricks, and heavy industrial loads:

3.4 Extra Heavy-Duty Applications

For cotton bales, lumber, and the most demanding loads:

At Jushuo Packaging, we produce PET strap across the full thickness range, with documented break force values for each specification.

4. Thickness and Equipment Compatibility

4.1 Automatic Strapping Machines

According to equipment manufacturers, automatic machines specify acceptable thickness ranges:

Using strap outside the machine's specified range causes feeding problems and seal failures.

4.2 Manual and Semi-Automatic Equipment

Manual tools and semi-automatic machines are generally more tolerant of thickness variation. However, consistency still matters for seal quality and tension control.

4.3 Verifying Compatibility

According to equipment best practices, verify thickness compatibility by:

1. Checking the machine manual for specified thickness range

2. Requesting samples in the intended thickness

3. Running feed and seal tests before full production

4. Documenting performance for future reference

At Jushuo Packaging, our technical team assists clients with equipment compatibility verification for all thickness specifications.

5. Cost Considerations

5.1 Material Cost vs. Performance

Thicker strap costs more per meter because it contains more material. According to packaging economics analysis, over-specifying thickness is a common source of unnecessary packaging cost. Selecting the thinnest strap that meets load requirements reduces material cost without compromising safety.

5.2 Total Cost of Ownership

The right choice depends on the application. Using a thin strap for a heavy load leads to failures and replacement costs that exceed any material savings.

5.3 Cost Optimization Strategy

According to procurement best practices, cost optimization involves:

• Matching thickness to actual load requirements

• Testing samples to confirm adequate performance

• Avoiding both over-specification and under-specification

• Considering total cost including downtime and failures

Summary

PET strap is available in thicknesses from 0.4mm to 1.25mm, with the most common grades being 0.5mm, 0.6mm, 0.8mm, 1.0mm, and 1.2mm. Thickness directly affects break strength, tension retention, and machine feeding reliability. Light-duty applications use 0.40–0.55mm, medium-duty uses 0.55–0.65mm, heavy-duty uses 0.65–0.80mm, and extra heavy-duty uses 0.80–1.25mm.

The practical approach is straightforward: match thickness to load requirements, verify equipment compatibility, and test samples before full production. Thinner strap reduces material cost for light loads; thicker strap provides the strength needed for heavy industrial loads.

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 selecting the right PET strap thickness 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. Signode Industrial Group. "PET Strapping – Technical Specifications." Signode.com, 2025.

4. International Organization for Standardization. "ISO 9001:2015 – Quality Management Systems – Requirements." ISO.org, 2015.

5. Joint Cotton Industry Bale Packaging Committee. "Bale Packaging Specifications – Polyester Plastic Strapping." cotton.org, 2024.