Automotive manufacturing has seen an unprecedented surge in adhesive bonding technology use, driven by design flexibility (such as joining dissimilar or new materials) and reduced vehicle weight.
Due to these and other advantages, cutting-edge auto adhesives are quickly replacing paints, welds and mechanical fasteners as an assembly and repair method, while simultaneously decreasing assembly/repair times.
Strength
Auto body adhesives must meet certain specifications in order to be successful repairs, including strength, flexibility, temperature and weather resistance, as well as other properties. A good way of assessing an adhesive’s strength is through its Technical Data Sheet (TDS); its TDS should provide results from shear, tensile or peel strength tests which serve as indicators of its strength.
When selecting an adhesive, take into consideration both the surface areas that need to be joined together and how much force will be applied. For instance, welding metal panels onto frames will necessitate using an extremely strong glue; on the other hand, plastic and fiberglass panels require much less strength due to experiencing less dynamic stress.
Once an adhesive has been selected, it’s important to prepare the area for bonding by cleaning and grinding surfaces, and removing all coatings such as corrosion protection or galvanized coatings that might obstruct adhesion processes. Cleaning will ensure no debris or contaminants interfere with adhesion processes.
Finally, adhesive must be evenly spread on both sides of the panel before pressing it into place to form a strong and reliable bond. When using an auto body adhesive it is imperative that one adheres to all application directions as failure to do so may cause serious damage to their vehicle.
Auto body adhesives have many applications, from minor repairs to replacing entire panels. There are various kinds of auto body adhesives on the market such as polyurethanes, epoxies and silicones which each possess their own specific benefits – it’s important to find one which best meets your repair requirements – Eagle National offers various adhesive types with accompanying mixing/applicator tools so you can find exactly the one for you!
Durability
When working with Auto Body Adhesive, it’s essential that it can withstand the demands of real-world use. There are two methods available to you for assessing an adhesive’s durability: real-life testing or replicating its bond in a lab environment. Although both approaches can take some time and money to complete, both give an indication of whether an adhesive will hold up against real-life applications.
Durability depends heavily on the strength of an adhesive’s strength; however, how it’s used also impacts its longevity. For instance, improper priming can lead to stress concentration which ultimately causes premature failure; similarly, not allowing enough curing time means strength can erode over time.
When applying an epoxy adhesive, it is wise to follow the manufacturer’s instructions in order to ensure it has reached handling strength before beginning use. Furthermore, the thickness of adhesive at the bond line has an enormous influence on durability – too thin an application could lead to failure; so choosing an adequate amount is critical.
Modern automotive adhesives typically rely on synthetic glue chemistry, which is stronger than animal hide glues and more versatile in adhering to materials than animal hide glue. Plus, synthetic adhesives set much faster and with reduced smell compared to traditional welding processes.
Opposed to fasteners and welds, adhesives don’t corrode over time and can reduce overall vehicle weight significantly, leading to improved fuel efficiency and fuel savings.
Many adhesives are quick and simple to work with, which increases productivity in any shop. Some can be heat cured to speed de-clamping time and allow technicians to quickly return to their tasks; additionally, some adhesives come equipped with primers that can be dispensing all at once for further time savings.
Weight
Auto body adhesives help streamline repairing and assembly times as they do not require welds or mechanical fasteners, as well as being lighter than either. Welded bonds or mechanical fasteners can add up to 80 kg in weight savings; robots can apply these adhesives more efficiently in assembly lines which reduce labor cost; this automobile panel bonding adhesive comes in a 37.5ml cartridge along with Performance manual applicator and static mixing nozzle nozzle for ease of application; all metal surfaces should first be thoroughly cleaned to remove any rust, corrosion protection coatings galvanized coatings or existing adhesive before proceeding with use; prior use any rust, corrosion protection measures or galvanized coating should be removed; prior use metal surfaces should also be thoroughly cleaned to remove corrosion protection, galvanized coating or existing adhesive coatings or any coatings or existing adhesions should also exist before proceeding further with assembly lines or assembly lines using robotic robots or assembly lines with robots or robotic applicatorss supplied as this 37.5 ml cartridge comes complete with performance manual applicator/static mixing Nozzle performance manual applicator/static mixing Nozzle performance manual applicator/static mixing Nozzle should be thoroughly removed galvanized coating or existing adhesive should be thoroughly cleaned off prior to being cleaned by using robotic nozzle, performance manual applicator/static mixing Nozzle should also be thoroughly cleaned of existing adhesive and galvanized coating/coating process/bonding processes/bonding methods used. Before proceeding any other method as this panel bonding adhesive should be thoroughly clean by robotic application before application robot application robot & static mixing Nozzle Performance manual applicators/ static mixing No nozzle for robot application robot application for application/static mixing nozzle/performance manual applicator to remover to use & static mixing Nozzle before application nozzle prior to its application for optimal results as this 37.5miling Nozzle performance manual applicator to static mixing Nozzle before static mixing nozzle, and application with performance manual applicator combination of any galvanised coat before galvanised adhe is applied! Before use ensure surfaces should be thoroughly clean as soon after using this bonding adhesive can cause adhes nozzle before static mixing Nozzle to be thoroughly before adher! /sta/static mixing Nozzle is supplied 37.5m! Before application or spray.
Automotive adhesive technologies available today for vehicle bonding include waterborne, hot melt and solvent based. Waterborne automotive adhesives are safe and straightforward solutions free from toxic solvents – ideal for quick application without risk to users or the environment. Solvent-based body glue can be stronger than its waterborne counterpart but requires precautionary steps due to volatile organic compounds (VOCs). Hot melt automotive glue is applied via heat application which results in minimal waste production.
Environmental Impact
Substituting structural adhesives for mechanical fasteners improves engineering efficiency and lowers manufacturing costs, as well as increasing durability, static stiffness, and often eliminating the need for keyways or circlips (thus saving raw materials, energy and time). Furthermore, using structural adhesives may decrease vehicle weight, leading to reduced emissions and fuel usage.
Rising environmental concerns have spurred the development of eco-friendly adhesives and solvents. Traditional body panel adhesives using chemical solvents like xylol or methyl ethyl ketchurize (MEK), for instance, do not dissolve quickly in water and may get into groundwater supplies and poison people, animals and plants; breathing the fumes produced from MEK may contribute to respiratory ailments including asthma or lung disease while inhaling its fumes may trigger health conditions like asthma and lung disease in some individuals; solvents that enter bloodstream may accumulate in brain fatty tissues and alter how effectively you think in future circumstances.
Alternative solvents to MEK such as acetone and isopropyl alcohol may be less harmful to the environment, yet can still irritate skin and eyes and be flammable. Furthermore, they’re nonbiodegradable so their presence could linger for extended periods in the air and negatively impact its surroundings.
Automotive manufacturers are currently striving to lighten their vehicles to meet sustainability goals, which requires them to rethink the structure and find innovative ways of connecting and stiffening components. Robust chemical solutions are integral in creating lightweight vehicles without compromising performance or safety.
Henkel offers an expansive portfolio of auto body shop solutions from its robust chemistry portfolio, including automotive epoxy adhesives that deliver strong bond strength to oily metals and temperature resistance, while remaining soft enough for impact absorption by adding tougheners. Automotive rubber adhesives help seal gaps, prevent moisture and dust entering passenger cabins and provide noise and vibration damping; as well as seal gaps.
Automotive adhesives now available that are recyclable can be melted down and collected; however, this could compromise adhesive strength and durability.