Nylon-6 (PA6) is a high-performance engineering thermoplastic belonging to the polyamide family, produced through the polymerization of caprolactam. Known for its outstanding strength, toughness, and abrasion resistance, PA6 combines mechanical reliability with cost-effectiveness, making it one of the most widely used nylons. With a density of about 1.12–1.14 g/cm³ and a melting point near 220°C, it maintains high tensile strength (70–90 MPa) and toughness even under stress. It has excellent resistance to wear and low friction properties, which makes it ideal for gears, bearings, and automotive components. Nylon-6 also plays a key role in the textile industry, where it is spun into fibers for fabrics, ropes, and carpets. While it absorbs moisture from the environment, which may affect dimensional stability and electrical insulation, this property can also enhance toughness. It resists oils, weak alkalis, and hydrocarbons, making it versatile in industrial and consumer applications. Nylon-6 can be processed by extrusion, injection molding, and spinning, ensuring adaptability across industries. Although it is not biodegradable, it is recyclable, extending its lifecycle in sustainable applications. Overall, PA6 is valued for its balance of strength, flexibility, and durability, making it a staple in automotive, textiles, and engineering plastics.