To close the heavy polyester strapping cycle where the actual PET tension causes slippage in smooth seals, a metal staple with calibrated internal teeth is required to bite into the rigid plastic surface. This PET strapping seal—also known as a serrated staple or serrated seal—is manufactured by Fortemo from galvanized steel with internal serrated teeth, in boxes of 600 units for 13-16 mm strapping, designed for heavy-duty strapping in construction, export, agro-industry, and operations where the seal cannot slip under the actual polyester tension.
Key Benefits
- Serrated internal teeth: The internal texture of the seal bites into the smooth, rigid surface of the PET strap, maximizing mechanical friction to prevent slippage under high tension.
- High-strength galvanized steel: Protection against oxidation during storage and transit in Caribbean climates, a key condition for maintaining structural integrity during prolonged shipments.
- Compatibility with standard tensioners: The format fits with common manual sealing and crimping tools on the market for 13-16 mm strapping, requiring no proprietary tool.
- Permanent and flat closure: When deformed with the pliers, the seal remains flat and without sharp edges that could cut the operator's hands or damage adjacent product on the pallet.
- Controlled Fortemo production: Uniform teeth throughout the box, a critical condition for each seal to provide the same grip.
Typical Applications and Uses
- Palletizing heavy construction materials with PET strapping: bricks, blocks, bundled sacks.
- Sealing wood loads, metal profiles, and industrial parts for inter-island export.
- Agro-industrial operations with dense sacks, bales, or bulk product palletized with PET.
- Closing bulky packages where plastic buckles cannot withstand the necessary tension.
Quality and Durability
An economical PET seal fails in two ways: the internal teeth are superficial (which causes the seal to slip under real tension) and the galvanization is deficient. Fortemo works with deep teeth and uniform galvanization, which separates a professional operation seal from a generic consumable. In export where the pallet spends days in transit, a slipping seal is equivalent to losing the cargo: the difference is measured in actual shipping security.
Because of strap mechanics. PET (polyester) is a rigid, very slick material; a smooth-interior seal would slip on the PET surface as soon as the load applied tension, voiding the closure. The internal serrated teeth bite into the plastic surface to create mechanical friction that holds the seal in place under high tension. PP, on the other hand, is softer and can be sealed with a smooth seal because the deformation of the plastic creates its own friction.
Physically it can fit PP strap of compatible widths, but it is not the optimal option. The serrated seal is calibrated for PET hardness; on PP, which is softer, the serration can tear the strap or produce an overly aggressive closure. For PP strapping there is the specific PP seal (smooth or lightly grooved interior, not serrated). For mixed PP+PET operations, it's worth keeping both consumables clearly differentiated.
Galvanizing protects against rust under normal conditions of storage, transport and occasional exposure to humidity and Caribbean sea mist. For prolonged outdoor storage with continuous extreme saline exposure, surface oxidation may appear over time, without compromising the seal's holding capacity during the regular shipping cycle. For normal logistics operations, it keeps its mechanical integrity throughout the full shipment.
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| Material | Stainless steel |
|---|---|
| Length | 30 mm (1.2 in) |
| Internal width | 17 mm (0.7 in) |
| Compatible with | Polyester (PET) strap, 13-16 mm (1/2-5/8 in) |
| Finish | Serrated |
| Thickness | 0.83 mm (0.03 in) |
| Box: Width | 38.0 cm (14.96 in) |
|---|---|
| Box: Height | 8.0 cm (3.15 in) |
| Box: Depth | 30.0 cm (11.81 in) |
| Box: Weight | 5.0 kg |
Payment & Security
