PET strap (polyester strap) derives its strength from the molecular weight of its raw material, which is measured by intrinsic viscosity (IV). The typical IV range for high-quality PET strap is 0.60 to 0.95 dl/g.

PET strap (polyester strap) has replaced steel strapping in many packaging applications, offering comparable tensile strength at one-sixth the weight, with no rust, no sharp edges, and 30–50% lower total cost. But can it replace steel completely? The answer is: in most applications, yes, but not all.

PET strap (polyester strap) achieves break forces ranging from 160kg to 1,360kg depending on width and thickness. This range accommodates applications from light pallet loads to heavy steel coil bundling and cotton bale packaging. Break force is determined by the strap's cross-sectional area and molecular orientation during manufacturing.

Aluminum products—ingots, coils, profiles, and sheets—present packaging challenges that ordinary strapping cannot handle. Heavy weights, sharp edges, surface sensitivity, outdoor storage, and ocean transit demand strapping with high tensile strength, low elongation, rust-free performance, and weather resistance.

PET strap (polyester strap) has become the modern alternative to steel strapping across industries ranging from steel processing to cotton ginning. It offers steel-like tensile strength at one-sixth the weight, eliminates injury risks from sharp edges and snap-back, and resists rust and corrosion.

PET strap (polyester strap) has a recommended storage life of 18–36 months under proper conditions. Temperature, humidity, UV exposure, and packaging integrity all affect how long PET strap maintains its performance.

Heavy industry packaging demands strapping that holds under sustained tension, resists abrasion, and survives outdoor storage and ocean transit. PET strap (polyester strap) and polyester rope are both used for load securing, but they perform very differently. Polyester rope stretches under load, loses tension as cargo settles, and abrades quickly against sharp metal edges.

PET strap (polyester strap) is available in thicknesses ranging from 0.4mm to 1.25mm, with each range suited to specific load requirements and equipment types. Thinner straps (0.4–0.55mm) serve light pallet loads and general packaging, while thicker options (0.8–1.25mm) handle steel coils, cotton bales, and the most demanding industrial applications.

Core dimensions are among the most overlooked specifications when buyers select PET strap (polyester strap) for automatic strapping operations. A strap that meets all mechanical requirements—correct width, thickness, and break force—will still cause feeding problems if its core size does not match the strapping head dispenser. Core inner diameter, roll width, and roll outside diameter must all be compatible with the machine's spindle and unwinding mechanism. This guide explains PET strap core dimensions, how they affect automatic strapping head performance, and how to verify compatibility before purchase.

Choosing between PET strap (polyester strap) and steel strapping is one of the most consequential decisions in industrial packaging. PET strap offers up to 50% cost savings per foot, eliminates injury risks from sharp edges and snap-back, and provides superior tension retention as loads settle during transit. Steel strapping delivers maximum rigidity for extreme loads but carries hidden costs including higher labor requirements, rust contamination risks, and equipment wear. According to industry data, PET strap provides four times the linear footage per ton compared to steel, fundamentally changing the cost equation.