On one hand, there are rivets, bolts, and welds. These are methods that clearly show how they work, mechanical technologies we understand very well and have known for a long time. There’s no need for someone to explain how to fasten a bolt or how this mechanism holds two metal pieces together. Moreover, we're used to seeing ships, buildings, and even bridges held together by massive bolts, and we take for granted that two metals can be joined using welding. For all these reasons, we naturally tend towards mechanical fastening solutions, which are familiar and "simple." Yet, despite this, we know that in many industrial sectors, for various needs, rivets, bolts, and welds have often been replaced by structural adhesives. These glues have become the default solution for bonding metals, plastics, and other materials due to the numerous advantages they offer, such as greater lightness, instant bonding, no pre-drilling, clean aesthetics, and more. These points could also apply to high-performance tapes, not just structural adhesives. Still, the question often remains: do structural adhesives really work? Are they strong enough to replace rivets, bolts, and welds in your company? Let's find out. We've already touched on what structural adhesives are, so we'll be brief here. In short, you could say they are extremely strong glues. If we want a qualitative definition, a structural adhesive is a glue that creates a bond at least as strong as the materials it's joining. But when it comes to strength, performance, and safety, qualitative descriptions may not be enough. That's why, in the United States, adhesives with a shear strength of over 7 megapascals are considered structural, while in Europe, the requirement is even higher—here, an adhesive is only called structural if its shear strength exceeds 10 megapascals. Typically, structural adhesives are liquid, thermosetting substances, though there are several variations. It should also be noted that these aren't new products. In fact, they are well-established. For example, 3M introduced the first neoprene-based contact adhesive in 1942, and in the 1960s launched the first flexible epoxied structural adhesive, as well as the first sprayable liquid adhesive. So, structural adhesives are a mature and standardized product. Let’s now see just how effective they really are. To understand how and how well structural adhesives work, there's nothing better than comparing them to the traditional fastening methods they are sometimes meant to replace. The most important measure used to express the strength of a fastening solution is the previously mentioned shear strength. Which solution—spot welding, flow welding, rivets, bolts, or structural adhesive—offers the highest resistance? Well, at the bottom of the list, with the worst results, are rivets. They are cheap, quick to use, but certainly not known for design flexibility or aesthetic appeal. Then come bolts, which, like rivets, can provide high strength at the point of installation, but cannot work across the rest of the surface. Spot welding performs slightly better, but still only works at specific points. The two methods that provide the highest shear strength are flow welding and structural adhesives, often performing up to three times better than rivets. With numbers in hand, structural adhesives work—often as well as, or even better than, traditional fastening solutions. They can be used in a wide range of applications: to bond metals, plastics, and composites, on stable or flexible surfaces, to withstand extremely high or low temperatures, and more. We invite you to discover the best structural adhesives available in our online store and find the one that best suits your business operations!
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PPGs for waterproof materials
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Toluene Diisocyanate,Toluene Diisocyanate Tdi,Polyol Tdi Soft Polyurethane,Foam And Oil Paint Raw Material SHANDONG S-SAILING CHEMICAL CO,LTD , https://www.sdqh-chem.comA Quick Overview of Structural Adhesives
Do Structural Adhesives Really Work? Here Are the Test Results
For Every Application
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Gli adesivi strutturali funzionano davvero?