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Flowable Nylon 66

Updated: 2026-07-22

Overview

Nylon 66, also known as PA66, is a synthetic polymer belonging to the polyamide family. It is renowned for its high mechanical strength, thermal stability, and resistance to abrasion and chemicals. Developed by DuPont in the 1930s, it has become a cornerstone material in industries ranging from automotive to textiles. Nylon 66 is produced through the polymerization of adipic acid and hexamethylenediamine. Its molecular structure provides a balance of rigidity and flexibility, making it suitable for demanding applications. The material is available in various forms, including granules, fibers, and films, catering to diverse manufacturing needs.

Physical and Chemical Properties

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Nylon 66 exhibits a melting point of 260-265°C, making it suitable for high-temperature applications. Its density is 1.14 g/cm³, and it has a low moisture absorption rate compared to other nylons, which enhances dimensional stability. The material is resistant to many organic solvents but can be dissolved in strong acids like formic acid. Its tensile strength ranges from 80-90 MPa, and it has a high fatigue resistance, which is critical for dynamic load-bearing components. These properties make Nylon 66 a preferred choice for engineering applications.

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Main Applications

Nylon 66 is extensively used in the automotive industry for components such as radiator fans, fuel system parts, and under-the-hood applications due to its heat resistance and durability. In the electrical sector, it is used for insulating components and connectors. Industrial applications include gears, bearings, and conveyor belts, where its low friction and wear resistance are advantageous. Additionally, Nylon 66 fibers are used in textiles for carpets, apparel, and ropes, leveraging their strength and elasticity.

Safety and Storage

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When handling Nylon 66, it is essential to avoid inhaling dust particles, which can irritate the respiratory system. Molten Nylon 66 can cause severe burns, so proper personal protective equipment (PPE) such as gloves and goggles should be used. Storage conditions should be cool and dry to prevent moisture absorption, which can affect the material's properties. Bulk storage should be in sealed containers or bags with desiccants to maintain quality. Proper ventilation is also recommended to avoid dust accumulation.

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B2B Procurement Guide

When procuring Nylon 66, buyers should verify supplier certifications such as ISO 9001 to ensure quality standards. Key specifications to check include moisture content, melt flow index, and thermal stability. It is advisable to request material test reports (MTRs) and samples for evaluation. Pricing can vary based on quantity, grade, and supplier location, so obtaining multiple quotes is recommended. Long-term contracts with reliable suppliers can ensure consistent quality and cost savings.

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