Polyamide (PA/Nylon)

Polyamide (PA), commonly referred to as Nylon (including PA6, PA66, and PA12), is a robust engineering plastic selected for its high wear resistance, exceptional tensile strength, and fatigue endurance. At Jucheng Precision, an ISO 9001:2015, ISO 13485, and IATF 16949 certified facility, we specialize in custom Nylon molding, particularly glass-fiber reinforced grades. Utilizing 35+ advanced molding presses (50-650T) and 25+ in-house 5-axis CNC machines, we control Nylon's high moisture sensitivity and thermal shrinkage. We offer free DFM analysis within 24 hours to optimize gate placement and cooling channels, ensuring tight tolerances verified by Zeiss CMM inspection.

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Our available materials

PA-Arkema Rilsamid AMNO

To secure ultimate dimensional stability and robust chemical resistance in aggressive fluid environments, Arkema’s Rilsamid AMNO offers an unreinforced polyamide 12 (PA12) matrix with the lowest moisture absorption among all major polyamides. Featuring a density of 1.01 g/cm³ and a melting point of 180°C, this high-performance nylon grade provides excellent low-temperature impact strength and resistance to hydrocarbons. Jucheng Precision, operating under strict ISO 9001, ISO 13485, and IATF 16949 standards, specializes in molding Rilsamid AMNO. Using our in-house 5-axis CNC-machined S136 tool cavities, we control molecular orientation to ensure leak-free fluid connections verified by Zeiss CMM.

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PA-BASF Ultramid A3EG10

Substituted for die-cast zinc and structural aluminum alloys in structural components subject to extreme mechanical stress and high fatigue loads, BASF’s Ultramid A3EG10 provides an uncompromised solution. This 50% glass fiber reinforced polyamide 66 (PA66-GF50) grade delivers a massive dry-as-molded (DAM) tensile strength of 230 MPa and an elastic modulus of 16,500 MPa, pushing the boundaries of plastic structural performance. At Jucheng Precision, an ISO 9001 and IATF 16949 certified manufacturer, we specialize in high-precision molding of Ultramid A3EG10. Utilizing 5-axis CNC-machined H13 steel toolings, we control its anisotropic shrinkage (0.3% parallel, 0.7% perpendicular) and prevent surface float fibers, ensuring zero-defect structural parts verified by Zeiss CMM.

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PA-BASF Ultramid A3EG6

Undergoing continuous thermal degradation and high cyclic loading inside modern engine compartments requires extreme heat-aging resistance, which BASF’s Ultramid A3EG6 delivers through its 30% glass fiber reinforced, heat-stabilized polyamide 66 matrix. Boasting a dry-as-molded (DAM) tensile strength of 175 MPa and a heat deflection temperature (HDT) of 250°C, this high-performance nylon grade is engineered for heavy-duty structural components subject to thermal cycling. At Jucheng Precision, an IATF 16949 and ISO 9001 certified manufacturer, we specialized in high-stress molding of Ultramid A3EG6. Utilizing our in-house five-axis CNC-machined H13 tooling, we mitigate fiber orientation stresses and optimize crystallization, delivering structurally sound parts verified by Zeiss CMM inspection.

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PA-BASF Ultramid A3U42G6

Meeting strict WEEE and RoHS directives in heavy-duty smart-grid electronics without using halogenated flame retardants or antimony requires a highly specialized material, which BASF’s Ultramid A3U42G6 delivers. This 30% glass fiber reinforced (PA66+PA6)-GF30 FR(40) copolyamide achieves an outstanding UL 94 V-0 flammability rating at a thin-walled 0.4mm and a 5VA rating at 1.6mm. Jucheng Precision, under ISO 9001 and IATF 16949 frameworks, specializes in precision injection molding of Ultramid A3U42G6. Utilizing our 5-axis CNC-machined S136 stainless steel molds, we control its anisotropic shrinkage (0.3% parallel, 0.9% normal) and eliminate corrosive gas burn defects, ensuring zero-defect components verified by Zeiss CMM.

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PA-BASF Ultramid A3WC8

To substitute heavy die-cast zinc and aerospace-grade aluminum alloys in load-bearing structural mechanisms without compromising thermal or chemical stability, BASF’s Ultramid A3WC8 leverages a 40 wt.% short carbon fiber reinforced, heat-stabilized polyamide 66 (PA66-CF40) matrix. Boasting a density of 1.28 g/cm³ and a melting point of 262°C, this high-performance composite provides an exceptional tensile modulus of 23,500 MPa alongside inherent electrostatic dissipation (ESD). Jucheng Precision, operating under IATF 16949 and ISO 9001 certified frameworks, specializes in molding Ultramid A3WC8. Supported by our 5-axis CNC-machined S136 stainless steel toolings, we control its anisotropic shrink variables (0.1%-0.4%) to deliver flat, structurally flawless components verified by Zeiss CMM.

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PA-BASF Ultramid B3S

PA-BASF Ultramid B3S is an unreinforced, easy-flowing, and finely crystalline polyamide 6 (PA6) resin engineered by BASF for rapid, high-speed injection molding of thin-walled technical parts. Featuring a density of 1.13 g/cm³ and an exceptionally high melt volume rate of 145 cm³/10 min (at 275°C/5kg), this fast-solidifying nylon grade is the industry standard for lightweight housings, clamps, and fittings requiring balanced mechanical stiffness. Jucheng Precision, operating under strict IATF 16949 and ISO 9001 frameworks, specializes in molding Ultramid B3S. Leveraging our in-house 5-axis CNC-machined S136 stainless steel molds, we control PA6’s high fluidity and 1.1% to 1.6% shrinkage rate to secure flash-free structural parts verified by Zeiss CMM.

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PA-DuPont Zytel 101L

PA-DuPont Zytel 101L is a lubricated polyamide 66 (PA66) resin developed by Celanese (formerly DuPont), highly specified for structural and wear-resistant applications requiring an optimal balance of stiffness and toughness. Boasting a density of 1.14 g/cm³ and a melting point of 262°C, this unmodified nylon grade features excellent chemical resistance, high mechanical strength, and exceptional self-lubricating sliding properties. Jucheng Precision, holding IATF 16949 and ISO 9001 certifications, excels in processing Zytel 101L. Leveraging our five-axis CNC-machined tooling and scientific moisture-dry controls, we mitigate nylon’s high shrinkage (1.3%-2.2%) to deliver dimensionally stable gears and brackets verified by Zeiss CMM.

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PA-DuPont Zytel 70C30HS

To substitute structural aluminum and zinc castings in high-load dynamic mechanisms without adding weight, Celanese’s Zytel 70C30HS (formerly DuPont) offers an advanced 30% carbon fiber reinforced, heat-stabilized polyamide 66 (PA66-CF30) matrix. Featuring a low density of 1.28 g/cm³ and a melting point of 262°C, this high-performance grade provides an exceptional tensile modulus of 20,000 MPa alongside inherent electrostatic dissipation (ESD) and near-zero wear. Jucheng Precision, operating under IATF 16949 and ISO 9001 certified frameworks, specializes in molding Zytel 70C30HS. Supported by our 5-axis CNC-machined CPM tool cavities and pressurized mold temperature controllers, we control its anisotropic shrink variables (0.1%-0.4%) to deliver flat, structurally flawless components verified by Zeiss CMM.

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PA-DuPont Zytel 70G33L

Replacing die-cast aluminum and zinc alloys with lightweight polymers requires extreme mechanical reliability, which Celanese's Zytel 70G33L delivers through its 33% glass fiber reinforced polyamide 66 matrix. Boasting a dry-as-molded (DAM) tensile strength of 200 MPa and a melting point of 262°C, this high-performance nylon grade is the global benchmark for load-bearing automotive manifolds, structural brackets, and power tool housings. At Jucheng Precision, an ISO 9001 and IATF 16949 certified manufacturer, we specialize in high-temperature molding of Zytel 70G33L. Supported by our 5-axis CNC-machined H13 tool cavities, we maintain high mold temperatures to prevent floating fibers, verified by Zeiss CMM inspection.

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Comprehensive Polyamide (PA/Nylon) Grades We Mold

We process high-strength Polyamide resins from world-renowned producers, supporting both ductile unreinforced and highly rigid glass-filled structural parts:

PA Material Class Typical Brand & Grade Key Characteristics & Advantages
Unreinforced PA6 / PA66 • DuPont Zytel 101L / 103FHS
• BASF Ultramid B3S (PA6) / A3K (PA66)
• Solvay Technyl A 216
High toughness, self-lubricating sliding properties, exceptional wear resistance, and damping capacity. Ideal for functional gears, bearings, cable ties, and pulleys.
Glass-Filled Reinforced • DuPont Zytel 70G13L (13% GF) / 70G33L (33% GF)
• BASF Ultramid A3EG6 (30% GF PA66)
• DSM Akulon K224-G6 (30% GF PA6)
Extremely high tensile strength, high modulus, outstanding creep resistance, and heat deflection temperatures up to 250°C. Ideal for automotive manifolds, structural brackets, and power tool housings.
PA12 & Specialty Nylon • Arkema Rilsamid AMNO (PA12)
• Evonik Vestamid L1600 (PA12)
• EMS-GRIVORY Grivory GV-5H
Extremely low moisture absorption, superior dimensional stability, chemical inertness, and high impact toughness even at low temperatures. Suited for medical tubes, precision gears, and automotive fuel lines.

Applicable Molding Processes for Polyamide (PA)

Nylon’s robust mechanical properties make it highly adaptable to advanced injection molding configurations:

Molding Process Process Suitability & Application
Standard Injection Molding Excellent. Highly suitable for structural gears, mechanical components, sliding pulleys, and terminal blocks.
Insert Molding Excellent. Nylon’s high structural toughness makes it the gold standard for encapsulating metal brass threaded inserts, bolts, and metal frames.
Overmolding / Multi-Shot Good. Often used as the rigid nylon base substrate and overmolded with compatible soft TPE/TPU formulations to form heavy-duty tool handles.

Polyamide (PA/Nylon) Injection Molding Manufacturing Guide

Nylon is highly hygroscopic and highly crystalline. Failure to control moisture or thermal crystallization parameters will lead to surface splay and mechanical degradation:

  • Pre-Drying: Nylon absorbs atmospheric moisture aggressively. Moisture levels must be kept below 0.20% (ideally <0.10% for structural parts) to prevent polymer chain degradation. Dry in desiccant dryers at 80°C–100°C (176°F to 212°F) for 4–6 hours.
  • Melt Temperature: Processed between 230°C and 280°C (446°F to 536°F) for PA6, and 260°C to 300°C (500°F to 572°F) for PA66. Exceeding 310°C will result in polymer thermal decomposition.
  • Mold Temperature: Managed between 60°C and 100°C (140°F to 212°F). For glass-filled grades, mold temperatures up to 120°C are recommended to prevent glass fibers from floating to the surface, ensuring a smooth and glossy finish.
  • Shrinkage Calculation: Nylon’s shrinkage is high and anisotropic (1.0% to 2.5% for unreinforced grades, reducing to 0.3% to 0.8% with 30% glass filling). Tooling designs must be strictly optimized for each specific grade.
  • Post-Molding Moisture Conditioning: Nylon components absorb ambient moisture post-molding, which increases toughness but slightly swells dimensions. Our engineers calculate this dimensional variance beforehand to ensure end-use accuracy.

Key Application Industries for Molded Nylon Components

  • Automotive Powertrains (IATF 16949 Certified): Engine covers, cylinder head covers, radiator water chambers, intake manifolds, air intake grills, and oil pans.
  • Industrial & Mechanical Transmission: Heavy-duty spur gears, worm gears, sliding bearings, pulleys, conveyor tracks, and heavy-duty structural washers.
  • Electrical & Electronic Housings: Connector blocks, DIN-rail housings, terminal blocks, electrical switches, and heavy-duty power tool casings.
  • Medical Devices (ISO 13485 Compliant): Wear-resistant surgical clips, diagnostic valve bodies, catheter connectors, and disposable fluid delivery casings (often utilizing PA12).

Material Properties

Density (Unreinforced PA66) 1.12 - 1.15 g/cm³
Density (30% GF PA66) 1.35 - 1.40 g/cm³
Tensile Strength at Yield (Unreinforced) 60 - 90 MPa
Tensile Strength at Yield (30% GF) 150 - 210 MPa
Tensile Elongation at Break 15 - 100 %
Flexural Modulus (Unreinforced) 2,600 - 3,200 MPa
Flexural Modulus (30% GF) 7,500 - 10,000 MPa
Izod Impact Strength (Notched, 23°C) 40 - 110 J/m
Melting Temperature 220 - 265 °C
Heat Deflection Temperature (HDT @ 0.45 MPa) 180 - 250 °C
Linear Mold Shrinkage 0.5 - 2.2 %
Dielectric Strength 18 - 25 kV/mm
Volume Resistivity 1.0E+14 Ohm·cm
Maximum Part Size 1000 x 800 mm
Minimum Part Size 1 x 1 mm