Polypropylene strap is an economical material designed for light to medium duty unitizing, palletizing and bundling. It is available in various widths, thicknesses, and polymer variations. It offers higher elongation at break but tends to have irrecoverable dead stretch with constant stress. The polypropylene strapping loses about 50% of the applied tension within one hour, and this tension loss is accelerated with increases in ambient temperature, consequently although suitable for packs with a degree of stored energy that will take up any relaxation that occurs in the strap.
Polypropylene strap is the most common choice for man-made fiber applications. It’s wide range of processing properties make it a superior choice for plastic strapping in all applications from light to heavy duty with an emphasis on economy.