Everything you should know about polypropylene (PP strap)

Essential information about polypropylene (PP tape)

PP strap is a thermoplastic polymer produced from polypropylene monomers. It serves a variety of purposes, proving particularly effective for securing consumer goods, plastic components for numerous sectors, including the automotive industry, and more. Polypropylene was first identified in 1951 by Paul Hogan and Robert Banks. The material quickly gained popularity, with commercial production commencing just three years after its discovery. By 1957, its use was on the rise, and today, it stands as one of the most commonly manufactured strapping materials worldwide.

What is the most effective method for packing with PP polypropylene strap?

PP polypropylene strapping can be applied either manually or by machine. PP strap is suitable for securing cartons, parcels, and pallets. For optimal speed and efficiency when packing boxes, automatic or semi-automatic equipment is recommended, such as the HIPO semi-automatic packing machine. Both boxes and pallets may also be secured using a battery strapping tool. While battery strapping tools are suitable for pallet strapping, the quickest method for pallet applications is often a semi-automatic pallet strapping machine, which enables the strap to be fed beneath the pallet and sealed (welded) with the assistance of the machine. This process can be carried out, for example, with our COMBO pallet strapping machine.

What are the characteristics of polypropylene?

The foremost property is its resistance to chemicals. Polypropylene does not readily react with diluted acids or bases, making it ideal for packaging liquids such as cleaning agents, first aid supplies, and similar products. Another key attribute is its combination of flexibility and toughness. In engineering terms, toughness refers to a material’s ability to deform without fracturing. A further benefit is shape retention; polypropylene keeps its form after twisting or bending, offering greater durability than many other plastics. Additionally, it provides excellent insulation, being highly resistant to electrical currents, which is advantageous for electronic components. Lastly, it is lightweight. Although polypropylene can be manufactured to be transparent, it is typically not supplied in this form, but this option is available for applications where light transmission is required.

What makes polypropylene so widely used?

Polypropylene is predominantly utilised in industrial settings. Its distinctive properties and adaptability to various manufacturing processes make it indispensable across numerous applications. Another advantage is its versatility, as it can be processed into both plastic and fibre forms. In recent years, it has replaced many traditional materials, particularly within the packaging sector.

Which varieties of polypropylene exist?

There are two principal types of polypropylene: homopolymers and copolymers. Copolymers are further divided into block copolymers and random copolymers. Each type is better suited to particular uses. Polypropylene is often described as the “steel” of the plastics industry because of the many ways it can be tailored or modified for specific requirements. This is typically achieved by adding certain additives or through specialised processing techniques. This adaptability is one of its most significant qualities.