There is a nationwide upscale in emission norms while the industry gradually moves from BS-4 to BS-6 by April 2020. 3M is playing a crucial role in assisting the emission component manufacturing industry in order to reshape the exhaust emission component structure, says DS Bhattacharya, General Manager, R&D, Automotive & Automotive Aftermarket, 3M India.
The advantages offered by structural adhesives in relation to traditional mechanical joints, such as welds, rivets or screws include the possibility to bond dissimilar materials with different CTEs (thermal expansion coefficients), obtaining monolithic structures which are mechanically resistant. It is also possible to achieve a reduction in weight, greater stiffness, better load distribution curves leading to delayed failures and better surface finish than bonds formed by mechanical fixing. Weight reduction, improved fuel efficiency and passenger safety – these will be the primary drivers for the growth of adhesive market in India, as these are encouraging auto makers and component makers to design components using alternate materials (UHSS, aluminium etc.) and composite materials. It will be crucial for auto makers and component makers to establish an ecosystem which will enable adhesive bonded joinery designs.
While we find such a diverse range of adhesive based applications in a vehicle, there exists disproportionate levels of value proposition against the process complexities enabled by these solutions. Therefore, automakers struggle to negotiate with these challenges and attempt
towards simplifying the conventional bonding methods, resulting in limited evolution and growth in adhesive based applications in vehicles. 3M’s adhesive technologies provide solutions to address majority of these challenges by reducing the process complexities. 3M has bonding solutions in viscoelastic tape forms, in the form of 2K epoxy structural tapes and adhesives, having high tolerance to varying ambient and process conditions, simple laminating adhesive transfer tapes, etc. These are adopted by auto makers and their component makers realising benefits such as dissimilar bonding, quick strength build – avoiding process delays and cleaner finish.
To cite a unique application, 3M engineers have successfully minimised the vibration concerns faced in the BIW while significantly contributing to the lightweighting to the car. As the trend shifts from mild steel to UHSS to aluminium and other lightweight materials, joining dissimilar metals will be a challenge and that’s where 3M has a wide portfolio of products to meet the customer needs.