会社のニュース The Performance Difference Between PA66 and PA6

  Polyamide 66 (PA66) and Polyamide 6 (PA6) are two prominent members of the nylon family with distinct properties. PA66 has a higher melting point, typically between 260–265°C, and a glass transition temperature around 50°C in the dry state, with a density of 1.13–1.16 g/cm³. PA6 appears as translucent or opaque milky white particles, with a lower melting point of approximately 220°C, a thermal decomposition temperature above 310°C, and a similar density of about 1.14. A key distinguishing feature is PA6's higher water absorption (around 1.8% in 24 hours). Both materials offer excellent wear resistance, self-lubrication, good mechanical strength, heat resistance, electrical insulation, and chemical resistance, especially to oils. When comparing the two, PA6 generally offers easier processing and better surface gloss, with a slightly wider use temperature range in some contexts. However, its higher water absorption can lead to greater dimensional changes in humid environments. PA66, with its higher melting point and superior mechanical and thermal properties, typically performs better in high-temperature, high-strength applications but can be more challenging to process. Key comparative takeaways include: Mechanical and Thermal Properties: PA66 > PA6; Price and Melting Point: PA66 > PA6; Water Absorption and Weather Resistance: PA66 < PA6; Processing/Forming Ease: PA66 < PA6.