Choosing between polypropylene (PP) strapping and polyester (PET) strapping is the most common decision when setting up a palletizing operation in the Dominican Republic. Both are plastic straps for securing loads, but they suit different usage profiles: the weight of the load, the type of transport, and the machine you use determine the right choice. This comparison helps you decide in under a minute.
🎯 Choose in 10 seconds
- If you palletize cardboard boxes or light/medium parcels: go to Polypropylene strapping (PP)
- If you secure heavy loads (bricks, blocks, timber) or export under the sun: go to Polyester strapping (PET)
What to consider before choosing
Before buying a coil, assess these four criteria. They are what determine whether the strap will withstand the journey without loosening or breaking.
- Load weight: polypropylene works well with light and medium loads (cardboard boxes, parcels, plastic bundles). For dense pallets of construction materials or metal parts, you need the retained tension of polyester.
- Transport and storage conditions: if the pallet will spend hours or days under the Caribbean sun before shipping, PET better resists solar radiation, humidity, and rain without degrading. Standard PP is for fast transit under cover.
- Strapping machine or tool: PP fits manual strapping tools with mechanical or plastic seals, semi-automatic ones, and arc machines with friction welding. PET requires manual, pneumatic, or battery strapping tools with serrated seals. Check that the coil core matches your coil spindle.
- Material quality: virgin plastic maintains uniform tension and gauge; recycled material loses strength after a few hours and tends to break when passing through the seal. This results in more line breaks and pallets that arrive loose.
Polypropylene strapping (PP): the standard for light and medium loads
- Virgin polypropylene with uniform 0.8 mm gauge
- Available in 13 mm and 16 mm widths
- Compatible with manual, semi-automatic, and arc strapping tools
- No sharp edges or dangerous snap-back when cutting
- Loses tension under very heavy loads
- Standard resistance to sun and weather
Fortemo polypropylene (PP) strapping is the base format of Dominican logistics: 1300 m coils in 13 mm or 900 m in 16 mm, with a uniform thickness of 0.8 mm (0.031 in) on a standard 203 × 203 mm (8 × 8 in) core. It works equally well in a manual strapping tool with a plastic seal, in a semi-automatic strapping tool, and in an arc machine with friction welding, making it the universal strap for warehouses, distribution centers, and courier operations.
Polyester strapping (PET): the option for heavy loads and export
- Industrial-grade virgin polyester, 1 mm thickness
- Long 1200 m coil in 16 mm width
- Resistant to sun, humidity, and rain: does not rust or stain
- Safe replacement for metal strapping (no sharp edges)
- Larger-diameter core (406 × 152 mm): check machine compatibility
- Closure with serrated seals, not by welding
Fortemo polyester (PET) strapping is the modern standard for replacing metal strapping. A 1200 m coil in 16 mm × 1 mm on a 406 × 152 mm (16 × 6 in) core, green in color for quick identification in the warehouse. Its great advantage over steel is elastic memory: it absorbs transport vibration without losing initial tension, which avoids the loosening typical of metal after several hours on the road. It fits manual, pneumatic, and battery strapping tools that work with high-security serrated seals.
Comparison table: PP vs PET
| Feature | PP strapping | PET strapping |
|---|---|---|
| Ideal use | Light and medium loads | Heavy and industrial loads |
| Material | Virgin polypropylene | Industrial virgin polyester |
| Thickness | 0.8 mm (0.031 in) | 1 mm (0.04 in) |
| Available widths | 13 mm and 16 mm (1/2 and 5/8 in) | 16 mm (5/8 in) |
| Length per coil | 900–1300 m (2953–4265 ft) | 1200 m (3937 ft) |
| Core (Ø × width) | 203 × 203 mm (8 × 8 in) | 406 × 152 mm (16 × 6 in) |
| Color | Black | Green |
| Resistance to sun and weather | Standard | High — does not rust or stain |
| Closure system | Mechanical seal, plastic, or friction welding | High-security serrated seals |
| Machine compatibility | Manual, semi-automatic, arc with welding | Manual, pneumatic, and battery |
Use case → recommended product matrix
| If your case is… | Recommended product |
|---|---|
| Palletizing cardboard boxes in a warehouse or distribution center | → PP strapping |
| Securing pallets of bricks, blocks, or cement bags | → PET strapping |
| Closing large boxes and grouping light parcels | → PP strapping |
| Export with pallets that spend days under the sun before shipping | → PET strapping |
| Holding bundles of light pipe or plastic profiles | → PP strapping |
| Holding timber, metal profiles, or heavy industrial parts | → PET strapping |
Before buying the coil, measure the inner diameter and the width of your strapping tool's coil spindle. Standard PP works with a 203 × 203 mm core, while PET comes on a 406 × 152 mm core. Confirming compatibility avoids buying coils that don't fit your machine and block the strapping line for the entire day. If you combine both in your operation, consider separate strapping tools for each material.
Do not use PP strapping to secure loads of bricks, concrete blocks, or grouped cement bags. Polypropylene loses tension under very heavy loads and the strap can break during transport. For that application, always use PET or, at the most demanding end, metal strapping.
All products compared
Does your case not quite match the profiles described?
If you need to validate the choice for a specific operation or you have a combination that this comparison does not cover exactly, you can ask about it here.
Frequently asked questions
Can I use PP strapping to secure heavy export pallets?
It is not recommended. Polypropylene is designed for light and medium loads and loses tension under the weight of blocks, bricks, or dense bags. For heavy pallets or export that spends days under the sun, use PET strapping, which maintains tension and resists the weather without rusting.
What is the real difference between virgin and recycled polypropylene?
Virgin polypropylene maintains uniform tension and a stable gauge throughout the entire coil. Recycled material loses elastic memory, has thinner zones that give way under tension, and tends to break when passing through the mechanical seal. In practice, a virgin coil yields more usable meters and reduces downtime from line breaks.
Does PET strapping really replace metal strapping?
Yes for most heavy loads. PET offers break resistance comparable to steel in heavy palletizing applications, without the risk of rust staining the goods and without the sharp snap-back that causes accidents when cutting metal strapping. Only for extreme loads (structural steel, sheet metal coils) is metal still preferred.
