PP Strap (polypropylene strapping) is currently the most common used plastic strapping for packaging of boxes - light and medium weight. The strap is secured by a heat weld, but also by making use of a buckle, depending on the application and the volume, with a hand-held device, strapping tool (semi-automatic) or a strapping machine (fully automatic). 

PET Strap (polyethylene terephthalate strap also known as polyester strap) is often used where formerly steel strap was applied. This is due to some very good properties of PET Strap. Not only is this strap very strong due to its high tensile and tear resistance, but also very elastic so that the reduction of the size can be accommodated. It is resistant to shocks and bumps. Even in the long term this strap is extremely robust, and insensitive to UV light. These properties remain valid, even at high temperatures. In addition PET Strap is also much lighter than steel strap.