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| Seals |
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| Basic seal joint types |
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| Notch joint |
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| One way to lock strap ends is to cut, or "notch" the seal and the strapping it joins to form tabs at the edges. These tabs are bent down (down notch joint) or bent up (reverse notch joint). The strength of the notch joint comes from the mechanical interlock between the seal and strapping. Notch joints are typically used on waxed strapping in packaging and unitizing applications. |
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| Crimp joint |
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| Another way to seal the ends of strapping is to press, or "crimp" undulations into the seal and strapping ends. The strength of the crimp joint comes from the deformed seal creating high frictional forces. Crimp joints produce high static and dynamic joint strengths and are used on applications like rail car loading in which the strapped load is subject to severe impact. |
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