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Guide: Everything you need to know about strapping - chewhooo - 12-19-2021
Guide: Everything you need to know about strapping
The Strapping Belt is one of the most commonly used means of unitization and bundling in the packaging industry. There are multiple types of strapping products available, as well as many application types, but strapping is especially used in environments such as:
Bundling together for handling and shipping: newspapers, pipe, lumber, concrete block, etc.
Attaching items to pallets, skids, and crates
Reinforcing wooden boxes, crates, and corrugated boxes, such as Gaylord
Attaching items to flatcars, flatbed tractor trailers, etc.
Strapping is most often used in complete horizontal or vertical bands. Typically, edge protectors are used to help spread the strap’s tension on the load at corners and reduce damage caused by that tension. Strapping can also be used in loops attached to holding locations such as rail cars, tractor trailers, or skids.
Main types of strapping available
Steel strapping: 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.
Plastic strapping: Polypropylene and polyester strapping are the main types of plastic strapping today. PP Strapping 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. Polyester strapping 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 has significantly less elongation than polypropylene and retains tension over a longer period of time.
Polypropylene strap is typically embossed, feels more like plastic, and has a matte-style finish.
Polyester is a glossy, smooth strap; it does not resemble polyester fabric in any way.
Since polypropylene is the most common plastic strap option, the term “poly strapping” will generally refer to polypropylene.
Polyester Composite Strapping works best when you need higher initial tension; polypropylene is best when high initial tension is unimportant and only low retained tension is needed.
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.
Which stretch film do you use for which load?
Often only a distinction is made between light, medium and heavy loads. In our experience, however, there are several factors that need to be taken into account. An important question, for example, is whether a load already has a certain stability or not.
For instance a pallet with toilet paper and a pallet with bottles of soft drinks. The former itself has much less stability than the latter. Another important factor is the wrapping machine that is used; what is the stretchability and what is the speed.
Sometimes the speed of the wrapping process can demand a thicker Stretch Film in order to guarantee the high output. Many factors play a role in choosing the right type of stretch film. We will be happy to advise you on this.
What is an Adhesive Tape?
Pressure-sensitive Adhesive Tapes consist of a backing material film coated with an adhesive intended for relatively low-stress applications. Light pressure, usually done by the fingertips, is applied to initiate the binding. In the sticking process, the fluid properties of the pressure-sensitive adhesive change rapidly to flow and set in the surface of the substrate.
Adhesive tapes first appeared in the mid-19th century for medical applications. In 1845, Dr. Horace Day created bandages from strips of fabric with rubber adhesive tapes. It was the inspiration behind Johnson and Johnson‘s Band-Aid. In 1923, the 3M Company formulated the first masking tapes. Adhesive tapes kept on evolving to materialize the present varieties of adhesive tapes (e.g., packing tape, painter‘s tape, and electrical tape) which serve their unique application. Nowadays, adhesive BOPP Tapes are certainly found in most offices, households, shops, and industries which undoubtedly makes them one of the most useful tools ever invented.
Adhesive tapes are efficient and readily available to perform different functions such as joining, masking, sealing, splicing, bundling, and surface protection, which does not require machinery or any other special tools. Adhesive tapes are lightweight and efficient to store; it usually comes in rolls and is only unwound if there is a need for adhesive. Unlike the traditional mechanical fastening objects such as screws and bolts, it eliminates the need to pierce or punch the substrate which induces a stress area.
Iron packing buckle: The iron Packaging Buckle must be packaged with a special packing machine and a special plastic packing belt. Use special strip steel and special tinplate. There are dense small thorns in the packing steel mouth, which has the effect of anti-skid, increasing the tension of the contact and ensuring the safety of the goods.
Strapping Machines are packaging machines that use bands of flat steel or plastic tightened around a package or pallet of goods and fasten together to secure the package. Straps can bundle products together, improve containment strength and to secure a load to a shipping pallet. Straps are made from a variety of materials based on the required strength of the strap.
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