PA66 GF20 granules are glass-fiber-reinforced nylon 66 pellets containing a nominal 20% glass fiber by weight. They are used when a molded component needs greater stiffness and dimensional stability than unreinforced PA66 can typically provide, while retaining the processing characteristics of a thermoplastic. The right grade depends on the part’s loads, temperature, moisture exposure, appearance requirements, and molding process—not on the GF20 label alone.
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In this guide, we explain the material’s main properties, suitable applications, and practical selection questions for B2B buyers. We also outline what to confirm with a supplier before requesting a quotation or approving a production trial.
This guide is intended for procurement teams, product designers, molders, and engineering teams evaluating PA66 GF20 for an existing part or a new design. It is also useful when comparing material quotations that use similar descriptions but may differ in formulation, performance, or documentation. For critical applications, treat general material guidance as a starting point and confirm requirements against the specific grade and part design.
PA66 is polyamide 66, also known as nylon 66, an engineering thermoplastic used in molded components. In PA66 GF20, glass fibers are incorporated into the polymer compound to reinforce it; “20” usually refers to a nominal 20% glass-fiber content by weight. The exact formulation, additives, and test values can vary between grades and suppliers, so the designation alone is not a complete material specification.
Glass fibers help the compound resist deformation under load compared with an unreinforced PA66 grade, although results depend on the grade, part geometry, and molding conditions. Reinforcement can also reduce shrinkage in some directions, but molded parts may still shrink differently along and across the direction of flow. This directional behavior matters when dimensional tolerances, flatness, or fit with mating parts are important.
PA66 absorbs moisture, and moisture can influence dimensions and mechanical behavior. Glass reinforcement does not remove the need to consider moisture exposure in service or to control pellet moisture before molding. The compound may also show visible fiber texture or flow-related surface differences, making it less suitable where a smooth, high-gloss appearance is a priority.
Use the grade’s technical data sheet (TDS) to compare measured properties under stated test conditions. A data point without its test method, specimen condition, and temperature may not predict performance in your component. The following figures provide context, not a substitute for the selected supplier’s documentation.
| Item | General reference | What to confirm |
|---|---|---|
| Glass-fiber content | Nominally 20 wt% for a typical GF20 designation | Whether the stated percentage is nominal or a controlled specification |
| PA66 melting behavior | Often near 260°C for PA66; the exact grade and test method matter | Grade-specific thermal data and recommended processing window |
| Injection molding melt temperature | A starting range around 270–295°C is used for some PA66 compounds | Supplier guidance for the grade, machine, mold, and residence time |
| Mechanical and dimensional properties | Grade- and test-condition-dependent | Tensile strength, flexural modulus, impact data, shrinkage, and conditioning state |
Processing figures in the table are indicative only. They are not a universal machine setting: excessive heat or residence time can damage a polymer, while unsuitable drying or handling can affect molding quality. Follow the supplier’s TDS and processing recommendations, and establish settings through a controlled trial on the intended equipment.
PA66 GF20 is commonly considered for molded parts that need a balance of stiffness, strength, heat resistance, and practical processability. Potential applications include automotive and industrial housings, brackets, clips, connectors, and mechanical components. Suitability depends on actual service loads, temperatures, exposure conditions, regulatory requirements, and the design of the finished part.
For a load-bearing component, compare the grade’s mechanical data with the expected load and the duration of that load; short-term test strength alone may not represent long-term service. For parts exposed to heat, check the relevant thermal data and evaluate performance at the intended operating temperature. If the component may contact water, oils, cleaning agents, or other chemicals, verify compatibility for the actual concentration, temperature, and exposure duration.
For precision parts, review the supplier’s shrinkage information and consider the effect of fiber orientation on dimensions. The mold, gate location, wall thickness, and cooling conditions can influence the outcome, so material selection should be coordinated with the molding team. For visible parts, request a molded sample or agree on appearance criteria before scaling production.
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Document the loads, operating temperature, environment, dimensional tolerances, appearance, and expected service life. Identify any applicable customer or industry specifications before comparing grades.
Compare GF20 with unfilled PA66 or other reinforcement levels based on the balance of stiffness, impact behavior, surface finish, and design needs. Ask whether the offered grade includes additives or modifications that affect its properties or processing.
Review test methods, specimen conditioning, and units alongside each reported value. Where a property is essential, agree on the required value and test basis rather than relying on a generic description such as “high strength.”
Confirm drying and molding guidance for the specific grade, then conduct a trial using the intended mold and process where appropriate. Inspect critical dimensions and part function under conditions representative of the application.
PA66 GF20 pricing is not determined by the material designation alone. It can vary with the grade formulation, order volume, packaging, delivery destination, and market conditions, so request a current quotation for the exact specification and quantity. Compare quotations on equivalent technical and commercial terms, including whether freight, packaging, and required documents are included.
Minimum order quantity and lead time also depend on the supplier’s stock position, production schedule, and order details. Rather than assume standard terms, ask for the available quantity, production or dispatch timing, and any sample or trial-order options. If your project has a fixed launch date, share the forecast and delivery location early so the supplier can confirm feasibility.
For a meaningful comparison, send the supplier your target application, annual or trial quantity, required properties, and delivery destination. If you already have a specification or a competing grade’s TDS, include it with your inquiry. This helps suppliers respond against the same requirements rather than quote a broadly similar material.
At YONGJUXING, we supply plastic raw materials and can discuss PA66 GF20 requirements with B2B buyers seeking a suitable grade for evaluation or sourcing. Share your application, target performance, processing method, and purchase quantity so we can review the request and confirm the available material information. Where applicable, ask us for the relevant technical and commercial documents before placing an order.
PA66 GF20 granules are a glass-reinforced PA66 option for components that may benefit from increased stiffness and dimensional stability, but the GF20 designation does not guarantee a particular performance level. The best choice is the grade that matches your part’s operating conditions, design constraints, processing setup, and documented requirements. Confirm the TDS, processing guidance, and commercial terms with the supplier, then validate the material in the intended application.
To request a quotation or discuss grade suitability, send YONGJUXING your part description, target quantity, key technical requirements, and delivery destination. We can use those details to clarify the material information and sourcing options relevant to your project.
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