In this chapter, adhesive bonding and sealing in automobile production are subdivided schematically into five ranges of application: (1) mechanical parts production, (2) the body shop, (3) the paint shop, (4) the assembly shop, and (5) the manufacturing of components. Depending on the variety of applications, adhesives must satisfy a wide range of require­ments. On principle, all body shop adhesives must be usable without risk to the paint shop and they must resist the high temperature of the paint bake ovens. Generally, the bond strength and/or sealing ability must perform under severe conditions for the life of the car. Further requirements depend on:

1. Function of the material (e. g., spot-weld sealants): good corrosion protection, weldability, no HCl or chlorine emitted to cause corrosion when overbaked, good adhesion on the substrates

2. Processing technique: manual or automatic application, bonding at the assembly line or at a separate working site

3. Specific material characteristics (e. g., moisture and/or hot-curing adhesive): curing time, stability in storage, flexibility at low temperatures, hydrolytic stability, aging resistance, adhesion properties

For all ranges of application the adhesives must not only meet the functional require­ments but also retain them under a wide variety of conditions during use: impacts, vibra­tions, climate conditions, extreme changes in temperature, corrosion, and so on.

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