The word ‘anaerobic’ means ‘absence of air’. Hence, as the name suggests, anaerobic adhesives need air to be removed for the adhesive to cure. Another requirement for anaerobic adhesives to cure is that they require contact with a metal. In other words, without metal they do not cure. So, in the presence of metal ions, such as iron or copper, anaerobic adhesives remain in a liquid state until they are isolated from oxygen. For example, when an anaerobic adhesive is applied on a bolt, it will remain liquid, but it cures or hardens rapidly when a nut and bolt are assembled. Anaerobic adhesives provide high strength against shear load and good temperature resistance.
Other advantages of anaerobic adhesives include – they quickly cure at room temperature, do not require blending, are non-toxic and easy to handle, are non-solvent and environment friendly. Attributing to these advantages, anaerobic adhesives are used in a large number of applications. They can be used as thread lockers, retaining materials, thread sealants and flange sealants. The use of anaerobic adhesives reduces component inventories, and manufacturing cost, and increases reliability of the equipment. They also help in minimizing aftermarket breakdown and problems associated with warrantee. In applications where fast curing of adhesives is required, anaerobic adhesives can be exposed to heat or in some assemblies, a primer can be used to accelerate curing. The primer can be applied to one, or both surfaces before the adhesive is applied.
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Key Trends, Drivers, Restraints
Anaerobic adhesives have a wide range of applications in various industries, such as automotive, marine, aerospace, medical, etc. They are also used in automobile engine assembly. Globally, the growing demand for automobiles and automobile components fuels growth of the anaerobic adhesives market. Many medical instruments use anaerobic adhesives for various purposes. As the global healthcare market is experiencing steep growth, it is expected to have a positive impact on the global anaerobic adhesives market. Anaerobic adhesives have many applications in aerospace and defense sectors. Most of the countries in the world are investing heavily in the defense sector. Also, commercial aircraft carriers have experienced tremendous growth globally. These factors contribute to fueling growth of the global anaerobic adhesives market. Various home appliances, such as dish washers, washing machines and cloth driers, food processors, etc. use anaerobic adhesives in their manufacturing. As the demand for these appliances is increasing day by day, the market for anaerobic adhesives is growing at a fast pace.
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Some of the challenges faced by anaerobic adhesives are exposure to high level mechanical stress, exposure to elevated temperature, etc. Traditional anaerobic adhesives can withstand limited temperatures. Many manufacturers are investing in research and development in order to overcome these barriers. With the help of innovative technologies, new anaerobic adhesives are being formulated, which can withstand high temperatures. Due to this, the use of anaerobic adhesives will increase in high temperature applications, such as automobile engines, aerospace, etc. Also, with the help of new technology, advanced and high performance anaerobic adhesives are prepared, which can withstand high mechanical stress, as compared to traditional adhesives. These can be used widely in applications where high stress is generated, such as in automobile engines. Due to these advancements, the anaerobic adhesives market is expected to grow at a rapid rate.
Though anaerobic adhesives have a number of applications and advantages, they are expensive. Also, they require special primers for passive metals, large bond gaps or inert surfaces. This increases the manufacturing cost. They can also damage some thermoplastics. These factors can hamper demand for the anaerobic adhesives market.
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The global anaerobic adhesives market can be segmented on the basis of product type and end use industry.
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