Polypropylene strapping is easy to use, economical, strong and half the weight of steel strapping.
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Poly strapping is weather resistant. No sharp edges makes this strapping safe to use. strapping is split resistant, helping to prevent pilferage machine grade polypropylene strapping works great in tabletop, semi-automatic strapping machine applications.
Strapping is embossed for reduced splitting, greater flexibility and better seal joint efficiency in heat seal machines. each roll is packaged in a usable carton.
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.
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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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