Discover the Types and Terminology of Strapping
In the packaging industry, strapping a common method of securing pallet loads. Be it cartons, bottles, brick stacks or containers, every load has to be bundled and unitised with a suitable strapping method that helps maintain load integrity.
With a variety of applications and uses, it is important to understand the different types and terminology of strapping materials. The materials come in multiple strength levels as well as elongation and recovery rates. Elongation and recovery are important for loads that are susceptible to sudden shifting. The movement will apply tension to the strap as the load shifts. As the shifting occurs, a strap can stretch to reduce the impact of sudden inertia changes. The straps recovery ability of the strap will indicate the straps ability to return to its original state
Types of Strapping:
Here are the Types and Terminology of Strapping which will help you determine the meaning of each:
Also known as PET strapping, Polyester Strapping is used for securing heavy loads such as bricks, timber and tiles. Polyester Strap is a safe alternative to steel, with limited elongation capacity and high tensile strength. The high level of elongation and recovery make this type of strap is ideal for loads that may settle, expand or contract during shipping. The elongation of the strap helps to reduce the impact of sudden movement. As the load shifts, the straps elongate lessening the force of a sudden shift. The straps recovery capabilities then pull the load back into the original position. The product is green in colour and is available for machine and hand applications.
Poly woven strapping has a high tensile-strength material that can be used for medium to heavy loads. This strapping is lightweight, rustproof and reusable making it a popular alternative to steel strapping. This is the solution to reducing workplace injuries it has no sharp edges and does not spring back like steel. Polyester woven strap retains high tension for long periods and can be retension easily during storage or transit. This strap is available in a variety of widths and breaking strains to suit every application.
Composite Strapping has a high tensile-strength and is UV-coated fibre. This offers the rigidity of steel while eliminating the disadvantages of steel such as sharp edges and a tendency to whiplash. It protects the operators from injuries while ensuring maximum load containment strength. This quality product offers an excellent safe alternative to steel strapping.
Steel strapping is a common and economical strapping method, best suited for bundling heavy products such as pipes, lumber, concrete blocks and coils of metal wire. To ensure the best performance of these strapping materials, we also have a full line of application equipment and accessories, including steel strapping seal clips, tensioner, crimper, pneumatic tools and dispensers. Steel strap is applied manually with a tensioning tool and then fastened together by crimping a steel buckle around the bands ends.
Omni Steel Strapping is available in a variety of grades, widths and thicknesses to suit every application. Steel strapping is available in two size coils; ribbon wound and rope wound:
- Ribbon wound steel strapping are smaller coils than rope wound coils, making them easier to handle. This strapping is ideal for hand-held applications as each roll weighs about 11 kg, far lesser than a rope-wound coil, which weighs 45 kg.
- Rope wound steel strapping is continuous spools used for high-volume applications. With an approximate weight per roll of 45 kg, a trolley dispenser is required to move this roll.
- Stainless steel strapping is the perfect solution for heavy-duty strapping applications when the loads are very heavy or likely to be exposed to the weather for an extended period of time.
Poly or Polypropylene Strapping is a plastic strap that is very economical compared to other materials. This type of strap has a high level of elongation but less recovery and strength. Poly Strapping is designed for light to medium duty unitizing, palletising and bundling. Consistent pressure to polypropylene strapping can result in unrecoverable dead stretch and inability to return to its original length.
Poly Strapping – Hand Grade: Hand-grade poly strapping is used for manual applications and comes in a dispenser box for convenience and ease of use. It is available in different grades and thicknesses to suit a range of applications. The strapping is tightened by using a tensioner to secure the strap, and then the ends are joined with a seal clip and crimp. This method holds the strapping tightly in place.
Poly Strapping Machine Grade: Machine-grade poly strapping or plastic strapping is suitable for use with semi-automatic and fully automatic strapping machines. In automated systems, the machine straps the band around the carton, tensions the strap tight and seals it by heat or friction weld. The entire process is fully automated, for a fast and efficient production line.
This Strapping Dictionary will help you in understanding the meaning of all terms used in strapping:
Linear breaking strength: Linear breaking strength (tensile strength) is the stress point at which the strapping itself will break.
System breaking strength: System breaking strength is the stress point at which the strapping, as well as the buckle, will break.
Core: This is the inner paper tube around which the strapping is wound. Core is measured in diameter and width.
Strapping Closure: Strapping closures are the seals or buckles that are used to hold two ends of strapping together. These are typically made from metal or plastic.
Creep: This is the loss of strapping tension that occurs over a period of time.
Strapping Weld: Strapping tools are used to melt the strapping ends together to form a single piece of strapping around a load.
Camber: This is the curve of a strapping. A machine strapping should not have camber or it will jam the strapping machine.
Coil Face: It refers to the measured width of the strapping coil.
Elastic Limit: The point of stretch after which the stretching properties of the strapping will be destroyed and it won’t recover properly.
Elongation: The amount of stretch available in the strapping as force or tension is applied.
Elongation Recovery: The ability of strapping to return to its original state after force or tension is applied.
Embossing: This is a textured pattern which is applied to the strapping surface. It helps improve stiffness characteristics of the strap as well as increase its joint efficiency and split resistance. However, if the strap is overly embossed, it can unduly increase thickness and make it prone to breaking.
Joint Efficiency: Joint efficiency is defined as the strength of strapping where its two ends are joined together. It is expressed in terms of percentage of the strapping break strength.
Knurling: This is the embossing on the surface of polypropylene strapping. It helps the ‘feed wheel’ in gripping the strapping and carrying it through the equipment. Shallow knurling may result in missed feeds or jammed strapping.
Retained Tension: It is defined as the strapping’s ability to retain stretch tension over time.
Seal Joint: It is the area where opposing ends of a plastic strapping are joined together.
Shock Resistance: The ability of a strapping material to return to its original state when tension is applied, without causing it to break.
Split Resistance: This is defined as strapping’s ability to resist a lateral tearing force.
Yield Strength: It is defined as the point of stress at which elastic deformation changes to plastic deformation, causing the strapping to deform permanently.
To ensure the best performance of these strapping materials, we have product lines of strap application equipment and accessories such as steel strapping seals, manual hand tools, pneumatic tools and dispensers. Contact us to find out more about the Types and Terminology of Strapping.
Types and Terminology of Strapping
Types and Terminology of Strapping