What Is PA66?

PA66, also known as Polyamide 66 or Nylon 66, is a semi-crystalline engineering thermoplastic valued for its combination of mechanical strength, stiffness, wear resistance, and heat resistance. It is used to manufacture components that must withstand repeated loading, friction, elevated temperatures, and demanding service conditions.

PA66 is produced through a polymerisation process involving hexamethylenediamine and adipic acid. The resulting polymer contains repeating amide linkages, which contribute to its mechanical properties and thermal performance. PA66 can be supplied as a base polymer or compounded with glass fibres, impact modifiers, heat stabilisers, lubricants, pigments, flame retardants, and other additives to meet specific requirements.

Compared with many general-purpose plastics, PA66 offers a useful balance of strength and temperature resistance. It is therefore widely used in automotive systems, industrial machinery, electrical components, connectors, fasteners, gears, bearings, and structural plastic parts.

PA66 is closely related to PA6, or Nylon 6, but the two materials differ in their polymer structures and typical performance. PA66 generally has a higher melting point and often provides good stiffness and heat resistance. PA6 may offer advantages in certain impact and processing situations. Actual performance depends on the exact grade, reinforcement, conditioning, component geometry, and operating environment.

PA66 Resin: Chemical and Physical Properties

Main Advantages of PA66

1. High Mechanical Strength

PA66 provides good tensile strength and stiffness, making it suitable for components exposed to mechanical loads. Glass-fibre-reinforced grades can offer substantially higher stiffness and strength than unfilled grades. The appropriate reinforcement level should be selected according to load, impact requirements, dimensional tolerances, and part design.

2. Heat Resistance

PA66 has a relatively high melting point for an engineering thermoplastic. Heat-stabilised grades are available for applications involving prolonged exposure to elevated temperatures. The maximum usable service temperature depends on load, exposure time, environment, and the specific grade rather than melting point alone.

3. Wear and Friction Performance

Selected PA66 grades are suitable for moving components such as gears, rollers, guides, and bearing-related parts. Wear performance depends on the mating material, surface finish, lubrication, pressure, speed, temperature, and grade formulation. Special low-friction or wear-modified grades may be preferable for demanding sliding applications.

4. Chemical Resistance

PA66 generally resists many oils, greases, fuels, and common industrial substances. However, strong acids, certain solvents, oxidising chemicals, and specific high-temperature environments may damage the material. Chemical compatibility should be checked using the exact chemical concentration, temperature, and exposure conditions.

5. Reinforcement and Modification Options

PA66 is available in many formulations, including glass-fibre-reinforced, mineral-filled, impact-modified, heat-stabilised, flame-retardant, and speciality grades. These options allow material selection to be matched more closely to the required strength, stiffness, dimensional stability, colour, electrical properties, and regulatory requirements.

6. Versatility in Manufacturing

Many PA66 grades can be processed using injection moulding. Certain grades are also designed for extrusion, compounding, and fibre-related applications. Processing recommendations differ by grade, so resin drying, melt temperature, mould temperature, and residence time should follow the supplier's technical documentation.

PA66 vs PA6: What Is the Difference?

Neither material is automatically the best choice for every application. Select PA6 or PA66 based on the required mechanical properties, temperature, moisture exposure, chemical environment, part geometry, cost target, and production process. Compare conditioned as well as dry-as-moulded properties where dimensional stability or impact performance is critical.

Supply Various Grades of PA66 Pellets

EXTRUTEX can help source PA66 resin from established international manufacturers and Chinese suppliers, subject to grade availability and commercial confirmation. The tables below organise the grades supplied for reference. They are intended as a starting point for material selection, not as a substitute for current manufacturer data sheets.

BASF Ultramid® PA66 Grades

Zytel® PA66 Grades

Radici PA66 Grades

Envalior PA66 Grades

Chinese PA66 Resin Supply – Including Sinochem

In addition to international engineering plastic brands, EXTRUTEX can help customers source Chinese-origin PA66 resin and compounds. Chinese supply options can be considered for general injection moulding, reinforced engineering components, electrical products, industrial machinery, and other applications, subject to the required specification and availability.

For buyers comparing Chinese and international materials, the important factors are not country of origin alone. Confirm the polymer type, viscosity or flow characteristics, reinforcement percentage, impact strength, tensile properties, heat performance, colour, moisture content, and relevant regulatory requirements. A grade should be approved based on technical suitability and documented quality rather than a generic PA66 designation.

Sinochem PA66

Sinochem International has publicly described its PA66 production and polymerisation capabilities. However, a verified public commercial grade catalogue with specific Sinochem PA66 injection-moulding grade codes was not available for confirmation when this page was prepared.

EXTRUTEX can therefore discuss Sinochem-origin PA66 as a potential sourcing route, subject to confirmation of the actual producing entity, commercial grade designation, intended application, export availability, and technical documentation. We will not assign invented grade codes or claim that an unverified grade is available.

Examples of Identifiable Chinese-Market PA66 Grades

The following examples illustrate the types of modified PA66 grades that are available from Chinese suppliers. They are not Sinochem grades and are listed separately so that their origin is not misrepresented.

Important: The Chinese supplier examples above are reference options, not a guarantee of current inventory or commercial availability through EXTRUTEX. Confirm the producer, official grade designation, technical data sheet, certificate of analysis, material origin, and quotation before specifying a grade for production.

PA66 Resin Applications

Automotive Industry

PA66 is widely used for automotive engineering components because suitable grades can combine strength, stiffness, heat resistance, and resistance to oils and greases. Potential applications include brackets, clips, housings, connector bodies, under-the-hood components, fan-related parts, cable-management components, and structural supports. Under-the-hood applications require careful evaluation of heat ageing, fluid exposure, vibration, and long-term mechanical performance.

Electrical and Electronics

PA66 grades are used in connectors, terminal blocks, electrical housings, switch components, cable-management parts, and other electrical products. Flame-retardant grades may be appropriate where fire performance is required. The correct UL 94 classification, test thickness, electrical properties, tracking performance, and regulatory documentation must be checked for the specific grade.

Industrial Machinery

Gears, rollers, guides, bushings, machine components, and other parts can be manufactured from suitable PA66 grades. Glass-fibre reinforcement may improve stiffness and load-bearing performance, while wear-modified formulations may help in selected sliding applications. Designers should consider friction, lubrication, moisture, thermal expansion, and contact pressure.

Consumer Products

PA66 can be used in durable housings, tool components, fasteners, sports equipment, household appliances, and other products that need mechanical strength. Grade selection depends on the balance between appearance, toughness, dimensional stability, cost, and moulding performance.

Industrial and Technical Components

Depending on the formulation, PA66 may also be suitable for precision moulded parts, structural components, fluid-handling equipment, and specialised industrial applications. Confirm chemical compatibility, operating temperature, pressure, and any applicable food-contact, drinking-water, electrical, or industry-specific approvals before use.

How to Select the Right PA66 Grade

PA66 Injection Moulding and Material Handling

PA66 is hygroscopic, meaning it can absorb moisture from its surroundings. Excess moisture in the resin during processing may cause surface defects, reduced properties, or other moulding problems. Proper storage and drying are therefore important.

• Drying: Follow the resin manufacturer's drying temperature, time, and target moisture level. Do not apply one drying recipe to every PA66 formulation.
• Storage: Keep unopened material sealed and protect opened bags from humidity and contamination.
• Melt temperature: Use the recommended processing window for the selected grade and processing machine.
• Mould temperature: Select the mould temperature according to the grade, part geometry, surface requirements, and dimensional targets.
• Residence time: Avoid unnecessary residence time and overheating, which can degrade the polymer.
• Regrind: If regrind is permitted, control its proportion, moisture content, contamination, and effect on mechanical properties.
• Glass-fibre grades: Account for fibre orientation, anisotropic shrinkage, possible surface effects, and the greater wear that reinforcement may cause to processing equipment.

The exact drying and moulding settings must come from the current technical data sheet and be validated on the production machine. The supplier's recommendations should take priority over general processing advice.

Quality Assurance and Documentation

When sourcing PA66 resin, EXTRUTEX recommends confirming the technical and commercial documentation before ordering. This is especially important when comparing grades from different producers or switching from an international brand to a Chinese-origin material.

• Official technical data sheet (TDS).
• Safety data sheet (SDS).
• Certificate of analysis (COA) for the supplied batch, where available.
• Grade designation, manufacturer, and country of origin.
• Virgin or recycled material status.
• Glass-fibre percentage and type of modification, if applicable.
• Impact test method, specimen type, conditioning, and units.
• Flame-retardant rating and supporting documentation, where required.
• Packaging format, batch identification, and traceability.
• Any applicable regulatory or customer-specific compliance documents.

Why Source PA66 Through EXTRUTEX?

EXTRUTEX helps customers identify and source engineering plastic materials for different manufacturing requirements. We can discuss international brands, Chinese-origin PA66, and modified grades based on the customer's intended application and technical specification.

• Multiple sourcing routes: Explore international and Chinese-origin supply options, subject to availability.
• Application-led selection: Identify possible grades based on load, heat, impact, reinforcement, and processing requirements.
• Technical comparison: Compare available grade documentation before selecting a material for trials.
• Modified PA66 options: Ask about glass-fibre-reinforced, impact-modified, heat-stabilised, and flame-retardant formulations.
• Quotation support: Provide the grade, quantity, delivery destination, and required documents so the supply option can be evaluated.

Brand names and trademarks mentioned on this page belong to their respective owners. Their inclusion identifies material families or grade references and does not, by itself, indicate an authorised distributorship or endorsement.

Frequently Asked Questions About PA66 Resin