Steel strapping was widely used to secure packages earlier to the launch of nylon strapping in 1960's. Subsequently polyester strapping and polypropylene strapping entered the market offering significant cost savings and features.
Polypropylene strapping is most widely used plastic strapping due to its low cost and acceptable features to suit most packaging applications.
Polyester strapping offers better break strength than polypropylene strapping. Polyester strapping offers higher tensioning capability, minimal elongation and high retained tension over time. The limitation with polyester strapping is low elongation recovery due to which if the package is dropped / damaged / deformed during transit, polyester strapping is not capable of stretching or adjusting, but might just snap.
Nylon strapping offers high break strength along with elongation and elongation recovery properties but is expensive compared to polypropylene strapping.
The right choice of plastic strapping - nylon strapping / polyester strapping / polypropylene strapping, has to be taken depending upon the package design, required break strength, elongation, elongation recovery, etc.
