Selecting the right strapping system is a common challenge for many businesses. Companies often struggle with product type, environmental conditions, and budget constraints.
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This process can be frustrating, as the wrong choice may lead to inefficient operations and damaged goods. The complexity of the decision can leave managers feeling overwhelmed and uncertain about the best path forward.
Fortunately, there are effective ways to approach this decision. Understanding different strapping materials, methods, and equipment is crucial for finding the optimal solution.
Read on to learn more about choosing the right pallet strapper so you can make a more informed buying decision.
It’s essential to first understand your application’s specific requirements. This includes evaluating the load characteristics, environmental conditions, and how the load will be handled and transported.
Measure the load’s weight and dimensions to determine the required strapping strength. Uniformly shaped products work best with standard strapping machines. Irregular shapes might need specialized machines or adjustments.
For example, steel strapping suits heavy machinery, while smaller packages may need polyester or polypropylene.
Consider where the strapping will be used (indoors or outdoors) and if it will face moisture, UV light, or chemicals. This helps in selecting materials that can adequately handle these conditions. Also, check available space for an automated system and ensure it will integrate smoothly with other equipment.
Decide how the strapped loads will be handled—manually or by automation. This choice impacts whether a manual, semi-automatic, or fully automatic system is best.
For example, products transported by truck need strapping characteristics that are different from those shipped internationally. Make sure the system can handle these transport conditions.
Different strapping materials offer various benefits depending on the application. Understanding these materials helps you select the right one for your needs.
Steel strapping is the most robust option for heavy-duty and sharp-edged loads. It is highly durable but prone to rust and requires regular maintenance. Though it has a higher initial cost, its strength and longevity make it suitable for industrial uses like steel coils. Many industries are transitioning from steel strapping to polyester PET due to its advantages in maintenance, cost-effectiveness, and safety.
Polyester (PET) strapping offers good strength and flexibility, and is less expensive than steel. It resists rust and corrosion and is 100% recyclable. Vertical strapping typically uses PET straps due to their strength and resistance to stretching. Horizontal strapping often employs PP straps, but you can also use PET.
Polypropylene strapping is lightweight and cost-effective, suitable for lighter loads and indoor use. Compared to PET, it is less durable and harder to recycle. Due to its lower cost and ease of use, this type of strapping is typically used for horizontal strapping of lighter packages.
Type of Sealing Method
Depending on the type of strapping material, and the equipment used, straps can be sealed in three main methods.
Metal Seals
Metal seals are used exclusively for steel strapping. It involves placing a seal over the overlapping strap ends and compressing it to secure the strap. It is a strong, reliable seal for loads requiring the extra durability of steel straps.
Friction Welding
Friction welding seals the strap using motors that generate vibrations, creating heat from friction which melts and fuses the strap ends together. This method provides a strong, reliable seal without the need for external heat sources or additional materials. It is ideal for high-volume operations where speed and consistency are crucial.
Thermo Welding
Thermo welding, also known as heat sealing, resistance welding or thermoseal, seals the strap using a heat source, such as a thermoprobe, to melt and fuse the strap ends. Effective for a variety of plastic straps and known for producing strong, durable seals, thermo welding is particularly useful in environments where precise control over the sealing process is necessary, ensuring uniformity and strength in each seal.
Several general factors can significantly impact performance and safety.
Your strapping system should comply with industry standards, such as ASTM for steel strapping. Meeting these standards guarantees safety and performance. Different industries, like automotive or food processing, have specific requirements that the system should meet.
Assess the tension needed to keep the load stable during transport and storage. Proper tension is essential for maintaining load security. Strapping systems should handle varying tension requirements depending on the load’s stability.
Choose a strapping method and material that offers safety for both the load and the handlers. Evaluate the safety features of different systems, including protective mechanisms and ease of operation. The system should be safe and suited to the operational environment.
Incorporating safety fences and security systems is important to protect people from potential hazards. The strapping system should include safety features and protocols to prevent accidents and injuries.
Selecting the appropriate strapping option is crucial for efficiency and effectiveness. Different types of strapping equipment offer varying levels of performance and cost. Consider manual versus automated operation factors to determine which choice best suits your needs.
Manual systems rely on human effort to operate strapping equipment. They are often less expensive but require more labor and can lead to inconsistencies in quality. Automated setups use machinery to perform strapping tasks.
They offer higher efficiency and consistency, making them ideal for high-volume environments. While involving a higher initial investment, automated systems reduce labor costs and improve accuracy.
Manual strapping systems are affordable and straightforward. They work well for low-volume applications where flexibility is needed. However, depending on the operator’s skill, they are slower and more labor-intensive. Although more affordable upfront, there is the long-term cost/risk of employee safety
Semi-automatic systems offer higher production rates than manual systems and are more portable. They are suited for medium-volume applications where automation is beneficial but not entirely justified. Due to their complexity, these systems still require some labor and can be costly to maintain. Semi-automatics are usually only used for smaller items.
Fully automatic strapping systems provide high production rates with minimal labor. They are best for high-volume operations needing consistent throughput. Despite their higher initial cost, they streamline the strapping process by automating the feeding, tensioning, sealing, and cutting of straps, reducing the need for manual labor and minimizing the potential for human error. They speed up the packaging process, ensuring consistent strap tension and seal quality, leading to improved load stability and reducing downtime. Fully automatic strapping machines can handle high volumes of pallets with minimal supervision, making them ideal for large-scale operations.
Evaluating the cost of strapping options is essential for budget planning. Assess the initial investment and ongoing expenses to ensure the selected system aligns with financial goals.
Compare the initial costs of strapping tools or machines and the materials used. Long-term benefits, such as increased durability and efficiency, may justify higher upfront costs. For instance, automated systems might have higher initial costs but offer better long-term value.
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Consider ongoing costs for maintenance, material replacement, and labor. Automated systems often lead to labor savings and increased productivity, which can offset their higher initial costs. Evaluate the total cost of ownership, including maintenance and operational expenses.
Analyze potential savings from reduced labor costs and improved productivity with automation. Calculate the return on investment by considering labor savings, injury reduction, and overall efficiency gains. Automated systems can provide substantial cost savings and enhance operational efficiency.
Effective testing and validation ensure the reliability of strapping solutions. Conduct trials to verify performance and confirm that the chosen system meets your requirements.
Perform trial runs to test the strapping system under actual working conditions. Make sure the system meets performance expectations and handles different load types effectively. Testing should include various environmental conditions to confirm system reliability.
Gather feedback from operators and stakeholders to refine the system. Use this input to make adjustments and improve performance. Address any issues discovered during trials so that the system fully meets your needs.
Reliable support and service from suppliers play a key role in maintaining strapping equipment. Evaluate their ability to provide timely assistance and ongoing support.
Select a supplier with a strong reputation and experience in producing reliable machinery. Ask about their use of up-to-date technologies and check if the equipment requires proprietary components. A reputable supplier will provide dependable and effective solutions.
Verify that the supplier offers comprehensive support, including installation, training, and maintenance. Access to quick replacement parts is essential for minimizing downtime. Ensure that the supplier provides robust support to keep your system running smoothly.
Assess how well the new system integrates with your current setup and its impact on material flow and space. The new system should fit seamlessly into your existing workflow without causing disruptions. Compatibility with existing equipment is important for efficient operations.
Review the warranty terms and the supplier’s service approach. A strong warranty and responsive service can save time and costs in the long run.
Handle It has created a checklist to help you assess your specific strapping system needs. It will help you consider all factors and make an informed decision that aligns with your business objectives and operational requirements.
Download our Strapping Equipment Checklist
Choosing the right strapping system helps you achieve performance, efficiency, and safety. The strapping experts at Handle It will review your unique packaging and stacking process and guide you toward the best solution.
Handle It offers a comprehensive range of strapping machines that we can customize to meet your unique needs. Click below to explore our horizontal and vertical strapping systems in depth to make a more informed decision.
Starting the process here is the first step in the right direction. The only way to learn how to ensure you’re doing the best you can for your business is understanding the fundamentals; knowing the different types of strapping available and taking into account the advantages or disadvantages of each; determining whether hand or machine application works best for your needs; and how to choose the right strap and machine for your application.
It’s not an easy process, nor is it an overnight one. It’s a process that takes time, knowledge, and dedication. We can help provide the knowledge, but it’s up to you dedicate the time to do your own research and get yourself acquainted with the terminology, the systems, and the products, as well as with the advantages and disadvantages. As the person who understands your business and your industry best, you're the one who's ultimately in charge.
Strapping is the most commonly used means of unitization and bundling in the packaging industry.
Because of its long history in the packaging world, there are lots of different types of strapping today; however, most strap is made from either steel or plastic. Each has their own advantages and disadvantages, making it critical to figure out exactly what works for your specific needs.
However, before we look at the different types of strapping, it is important to ensure that you are familiar with the terminology of the strapping industry. These are the common terms used to determine the right strapping product for your application and your needs.
Steel is the oldest, strongest, and highest tensile strength strapping available. It is available in a variety of widths and thicknesses, as well as variations in the grade of steel. Steel is used for heavy duty holding where high strength and minimal stretch are desired, as well as when the product may be sharp or hot.
Surface finishes for steel strap include paint, paint and wax, bluing or zinc and wax. The wax is used to better transmit the tension around the bundle and for use with certain types of tensioners.
While it is still the preferred alternative in some industries, the market is declining, largely because it is dangerous to work with (presenting sharp edges) and difficult to recycle. But, common applications still include steel coils, bundles of metal, baling wire, bricks and pavers, and roll end-binding.
Polypropylene is an economical material designed for light to medium duty unitizing, palletizing, and bundling. It is available in various widths, thicknesses, and polymer variations (e.g., copolymers). This product offers higher elongation, but tends to have irrecoverable dead stretch with constant stress.
What is not generally known to end users is that poly strapping will lose about 50% of the applied tension within one hour, and that this tension loss is accelerated with increases in ambient temperature. Poly strapping can printed, offering security and marketing advantages to the strapped product.
Polyester is the most rigid option, offering the strongest plastic strapping, and is used as a viable alternative to steel in many industries. Polyester provides excellent retained tension on rigid loads and its excellent recovery properties help a load absorb impact without strap breakage. It retains tension over a longer period of time.
Since polyester strapping offers the highest strength and greatest retained tension of all the plastic strapping, it is often used on heavy duty loads that need high initial tension along with high retained tension during handling and storage. Competitive pricing and performance characteristics have motivated many steel strapping uses to switch to polyester. This type of poly strapping is available in both machine grade and hand grade and is easy to dispose of and recycle.
These tools rquires a tensioner, a sealer, and seals. This is the most common way of applying strapping. You tighten your strap with the tensioner and seal it with the sealer. Sounds easy, but if you’re using old hand tools, which are typically very heavy and difficult to manuever, it’s anything but easy. Workers not only have to be strong, but they must also know the proper way to use the tools to avoid injury. Hand tools can take between 2 and 3 minutes to secure just one strap.
These style tools combine all the necessary operations - tensioning, sealing, and cutting - into one tool, offered in varying strengths to accommodate the unique needs of the user. Being much lighter-weight, some as light as seven pounds, means no more struggling and needless injuries. And the power aspect allows workers to secure straps up to six times faster than with a hand tool, sometimes taking as little as 30 seconds per strap.
Also known as “table top” machines, semi-automatic strapping equiment is entry level style machines used for low volume operations and usually about the size of a small desk. These can only be used with poly strapping.
With a semi-automatic machine, an operator takes a loose end of poly strapping that has been fed from the machine, loops it around the package, and hand feeds it into the strapping and sealing area. The machine tensions the strap according to a pre-set tension, heat seals the ends together, and feeds out a pre-set length of strap for the next cycle.
Arch strapping machines are more automated than semi-automatic machines, but still require an operator to position the package, and press an activation button to start the strapping operation. With an arch machine, the strap travels around an “arch” creating a loop before activation. When the operator activates the strapping sequence, the strap tensions, heat seals, and pre-feeds the strap for the next cycle.
Arch size is critical with an arch machine, since package size is limited to what will fit under the arch.
Arch machines are much faster than semi-automatic machines, less operator dependent, and, thus, more expensive.
Fully automatic strapping equipment have built-in conveyor systems which carry products through the strapping process, activated by an automated device, usually a photocell. As such, they do not require an operator. Similar to the arch machines, size is critical, since package size is limited to what will fit under the arch.
The critical factor with fully automatic machines is the total strap rate, which includes transit time through the conveying system. The conveyor speed of your fully automatic strapping machine must be at least as fast as your existing conveyors, but preferably faster. Don’t design a strapping bottleneck.
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