Polyamides such as PA6, PA66, PA12, PA11, PA46 and PA610 sometimes differ significantly in their mechanical and chemical properties. PA66 and PA46 are characterized by high tensile strength and rigidity, while PA12 and PA11 are more flexible and lighter. The melting points also vary greatly: PA46 tops the list at just under 300 °C, while PA12 and PA11 melt at around 175-185 °C. PA6 and PA66 absorb a relatively high amount of moisture, which can limit dimensional stability in humid environments.
PA12 and PA11 are particularly chemically resistant - ideal for applications with prolonged media contact, such as in the automotive or packaging industry. PA610 offers a good balance between chemical resistance and processability. PA46 scores highly in terms of thermal resistance, but is more difficult to process. PA11, which is bio-based and moisture-resistant, is particularly sustainable.
This results in clear fields of application, at least based on the properties: PA6 and PA66 are suitable in theory for mechanically stressed machine parts, but are by far the most commonly used throughout industry due to their cost efficiency and ease of manufacture. PA12 and PA11 are ideal for flexible hoses and packaging. PA46 is used in heat-resistant precision components, while PA610 is convincing in structural applications such as household appliances or agricultural technology. Ultimately, of course, the choice of polyamide remains very individual and is linked in particular to requirements, price and availability.
