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Polyester is the most rigid of all strapping buy materials. It elongates significantly less than polypropylene and retains tension over a longer period. Polyester is nick resistant and can be sealed bubble with seals, heat or friction welds. Because polyester wrap offers the greatest strength and highest retained tension of all plastic strapping, it is frequently used on heavy duty loads that need high initial buy and bubble tension along with high retained tension during handling and storage. Common applications are empty cans and bottles, lumber and heavy, rigid palletizing. Polyester has a smooth, shiny finish and is easy to dispose of and recycle.Polypropylene strapping is the most commonly used and least expensive of all strapping materials. It is light and easy to apply and recycle. Characteristics include high elongation and elongation recovery, but low retained tension. Polypropylene is an excellent choice for light duty palletizing, unitizing, carton closing and bundling. Because of its wrap and buy and bubble embossing (or waffle) pattern, strap thickness is not a useful measurement. A standard 1/2" machine grade strap can be embossed to a thickness of anywhere between .014 and .030, depending upon how deep the embossing pattern is. An overly embossed strap wrap will be thicker, but will buy have a lower break strength. Carton bubble Reinforcement: A 3:1 ratio of strap to carton weight is recommended. For a 100 lb package this could be done with (1) 300lb tensile strap wrap or (2) 150lb straps. Unitizing and Bundling: A 5:1 buy and bubble ration of strap to carton weight is recommended. Palletized Cases: Required wrap Tensile Strength = buy (Pallet Weight x 1.5) / # of Straps
Metallocene film is a new hybrid stretch wrap that offers up to twice the tear and puncture resistance bubble of conventionally manufactured films. Metallocene resins are cleaner, stronger, and tougher than conventional resins like octene, hexene, wrap and butene. Metallocene film is available in rolls that require a hand dispenser. buy Packaging Supplies Company stocks metallocene bubble film that is 16" wide and ranges from 14-19 microns. Gauge Chart The thickness (and therefore strength) wrap of stretch wrap is measured in gauge or microns. A larger number means more thickness and more strength. Refer to the chart below for comparisons with other common measurements.
Do you have a fragile item you need to mail and want to ensure it gets there safely? Visit our pages for a great selection of shipping and mailing accessories. Find all the items you need to properly pack and mail your items.
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