| HS Code | 383702 |
| Density | 1.55 g/cm³ |
| Filler Content | 50% glass fiber by weight |
| Water Absorption 24 Hr | 1.0% |
| Tensile Strength At Break | 220 MPa |
| Tensile Modulus | 16000 MPa |
| Flexural Strength | 310 MPa |
| Flexural Modulus | 12000 MPa |
| Notched Izod Impact 23 C | 80 J/m |
| Heat Deflection Temperature At 1 8 Mpa | 210 °C |
| Glass Transition Temperature | 125 °C |
| Volume Resistivity | 1×10¹⁵ ohm·cm |
| Ul94 Flammability Rating | HB |
As an accredited Encom Polymers EnLon PX50GF Amorphous Nylon, 50% Glass Filled factory, we enforce strict quality protocols—every batch undergoes rigorous testing to ensure consistent efficacy and safety standards.
| Packing | EnLon PX50GF amorphous nylon, 50% glass filled, supplied as dry pellets in 25 kg sealed polyethylene bags, palletized and stretch-wrapped. |
| Container Loading (20′ FCL) | One 20-foot FCL container loaded with Encom Polymers EnLon PX50GF Amorphous Nylon, 50% glass filled, palletized and secured. |
| Shipping | EnLon PX50GF ships as a non-hazardous engineering thermoplastic resin. Packaged in sealed, moisture-resistant bags or drums to prevent water absorption. Store dry, away from heat. No special transport restrictions, but keep upright and protect from physical damage. Standard freight handling applies with proper labeling for polymer pellets. |
| Storage | Store EnLon PX50GF in its original, sealed packaging in a cool, dry, well-ventilated area. Protect from moisture, direct sunlight, and heat sources, as the amorphous nylon absorbs humidity. Keep away from oxidizing agents and food products. Avoid dusty conditions; use appropriate handling and ventilation to minimize airborne particles. |
| Shelf Life | Shelf life is indefinite when stored sealed, cool, and dry; protect from moisture to prevent degradation before processing. |
Underhood high-voltage connector housings molded from EnLon PX50GF require predrying at 80°C for 4 h in a desiccant dryer with a dew point of −40°C; residual moisture above 0.08 wt% produces splay at gate lands and interfacial delamination around glass-fiber bundles during injection. The compound is used at 100% virgin content for terminal retention areas, while closed-loop regrind is limited to 20 wt% and only after validation to USCAR-2 Revision 5 terminal pull-force and post-thermal-shock conditions. Melt temperature is maintained between 275°C and 285°C; excursions above 290°C cause thermo-oxidative molecular weight loss and yellowing in hot-runner manifolds, while temperatures below 265°C produce short shots and unwetted glass bundles at knit lines. Mold temperature is held at 90–100°C with pressurized water temperature control units to minimize differential shrinkage and warpage in connector bodies longer than 120 mm. On a four-cavity mold with 120 g total shot weight, clamp force of 150–200 t is used; higher clamp force does not compensate for poor fiber orientation and may increase molded-in stress. End product types include high-voltage terminal housings, terminal position assurance retainers, and interlock slider bodies used in EV battery management system connectors. Compliance is verified to USCAR-2 Revision 5 mechanical performance groups and end-product glow-wire testing to IEC 60695-2-11 at 850°C with no persistent flame, plus material-level flammability classification according to UL 94 V-0 at the supplier-certified thickness; the specified thickness must be confirmed because 50% glass-filled amorphous nylon flammability is wall-thickness dependent.
In switchgear contactor base plates and arc chamber side walls, EnLon PX50GF is processed at 100 wt% without unreinforced nylon or impact modifiers because even 5 wt% of a polyolefinic modifier reduces comparative tracking index and increases surface carbonization under repeated arc exposure. The compound is dried to 0.08 wt% moisture maximum and injection molded with sequential valve gates that prevent knit lines from intersecting high-voltage creepage paths between phase barriers; melt temperature is set at 270–280°C, mold temperature at 95°C, and injection speed is profiled low during gate entry to reduce jetting then high through the flow path to maintain glass-fiber length. Regrind is limited to 10 wt% and only for non-creepage areas, because lot-to-lot variation in regrind glass-fiber length distribution reduces surface resistivity and increases glow-wire ignition sensitivity. Comparative tracking index is evaluated to IEC 60112:2020, dielectric strength to ASTM D149-20, surface resistivity to ASTM D257-14, arc resistance to ASTM D495-22, and end-product glow-wire testing is conducted to IEC 60695-2-11 at 850°C. The downstream production process starts with compounded pellets from a 40:1 L/D twin-screw extruder; the injection molding stage uses a 20:1 L/D reciprocating screw with bimetallic barrel and hardened check ring to resist glass-fiber abrasion during plastication. Terminal finished products include contactor base plates, arc quencher structural frames, and busbar support brackets. This compound is not suitable for direct arc contact material or for continuous exposure to arc plasma; it serves as the structural housing and insulation barrier, not as the arcing contact itself.
Optical transceiver module housings demand ±0.02 mm bore positioning across the molded body, a tolerance that shifts with glass-fiber orientation and moisture uptake; EnLon PX50GF is used at 100 wt% virgin compound with regrind prohibited because even 2 wt% reprocessed material introduces volatile residues that can outgas onto optical surfaces during thermal aging. The compound is dried at 80°C for 4 h and molded with mold temperature uniformity better than ±5°C; gates are placed at the longitudinal side wall to align fiber orientation along the optical axis rather than across bore centerlines. Melt temperature is maintained at 275–285°C; injection speed is reduced in the gate region to avoid glass-fiber breakage, then increased to maintain uniform filling of thin-walled housings. After molding, parts are annealed at 100°C for 2 h to relieve molded-in stress and stabilize moisture-related dimensional drift before bore pin gaging. The downstream process includes CNC machining of critical optical bores only when post-mold dimensional checks exceed 0.01 mm deviation; otherwise, the parts are assembled directly into transceiver modules. Compliance is verified to Telcordia GR-468-CORE for optoelectronic device reliability, IEC 61753-1:2020 for fiber optic interconnecting device performance, and Directive 2011/65/EU RoHS material restrictions. Terminal finished product types include SFP module structural frames, LC duplex adapter housings, and optical bench bases used in data center transceiver assemblies.
For centrifugal pump wear rings, impellers, and casing inserts, EnLon PX50GF is used at 100 wt% compound; regrind is not recommended because any glass-fiber length reduction from multiple heat histories lowers abrasion resistance and increases the risk of crack initiation at sharp thread roots. The compound is dried to 0.08 wt% moisture before injection molding at a melt temperature of 265–275°C and mold temperature of 85°C; these settings are lower than those used for connectors to limit hydrolytic molecular weight loss during thick-section filling. The downstream process uses slow injection and long hold pressure to avoid internal voids in sections thicker than 10 mm, followed by post-mold conditioning in 50% relative humidity for 48 h before final machining of wear ring bores. Compliance is evaluated by immersion testing to ASTM D543-20 in the specific pumped medium at 60°C maximum, with tensile and flexural properties measured to ISO 527-2:2012 and ISO 178:2019. Dimensional stability under thermal cycling is assessed according to ISO 11359-2:1999. The compound is restricted to chemically mild media between pH 4 and 8 and continuous service below 60°C because glass-filled amorphous nylon is subject to hydrolysis and property loss in hot water; dry-running temperatures above 110°C also risk softening and reduced wear-ring clearance. Published long-term hydrostability data for this specific 50% glass-filled amorphous nylon in hot water above 60°C are limited, so validation is required before use in aggressive media. Terminal finished product types include centrifugal pump impellers, wear rings, and casing insert rings for chemical transfer and light industrial circulation pumps.
Power tool gear housings produced from EnLon PX50GF are processed at 100% compound, with closed-loop regrind limited to 15 wt% and restricted to non-load-bearing rib sections; the regrind fraction is generated from cold runners and rejected parts, not from glass-fiber dust or post-industrial scrap. Drying is performed at 80°C for 4 h to 0.08 wt% moisture. Melt temperature is set at 270–280°C, mold temperature at 85°C, and injection pressure between 120–160 MPa for a 300 g gear housing with wall thickness from 2.5 mm to 6 mm. Sequential valve gating is used to orient weld lines away from high torsional load paths at mounting bosses. The downstream process includes post-mold annealing at 100°C for 2 h to stabilize dimensions before bearing seat machining. Compliance for hand-held power tools is validated to IEC 62841-1 mechanical endurance tests; material-level thermal aging is assessed according to UL 746B relative thermal index and tensile strength retention after oven aging. Terminal finished product types include cordless drill gearbox housings, angle grinder gearcase covers, and impact driver transmission housings.
| Application scenario | Predrying condition | Melt temperature range | Mold temperature range | Maximum regrind fraction |
|---|---|---|---|---|
| Automotive high-voltage connector housings | 80°C for 4 h, −40°C dew point | 275–285°C | 90–100°C | 20 wt% |
| Switchgear contactor base plates and arc chamber side walls | 0.08 wt% moisture maximum | 270–280°C | 95°C | 10 wt% |
| Optical transceiver module housings | 80°C for 4 h | 275–285°C | ±5°C uniformity, 100°C set point | none |
| Centrifugal pump wear rings and impellers | 0.08 wt% moisture before thick-wall molding | 265–275°C | 85°C | not recommended |
| Power tool gear housings | 80°C for 4 h | 270–280°C | 85°C | 15 wt% |
| Appliance motor brush holders and commutator support rings | 0.08 wt% moisture before molding | 270–280°C | 90°C | 25 wt% (non-safety) |
Under sustained appliance loads, brush holder housings and commutator support rings in small appliance motors made from EnLon PX50GF are used at 100 wt% compound; regrind up to 25 wt% is allowed for non-safety-critical components, but not for commutator support rings where impact and creep resistance are inseparable. The compound is dried to 0.08 wt% moisture before molding at 270–280°C melt and 90°C mold temperature. Creep modulus under continuous load at 80°C is evaluated to ISO 899-1:2017; unsupported spans longer than 100 mm require ribbing because the 50% glass-fiber orientation creates anisotropic creep resistance, with lower resistance transverse to flow. The downstream process uses thick-wall injection molding with 2.5–4 mm nominal walls and extended holding pressure to minimize sink marks at brush holder retention bosses. End-product safety compliance is verified to IEC 60335-1 for household appliance mechanical strength and abnormal heat exposure; electrical insulation systems are evaluated to UL 1446 for motor brush holder assemblies, and fire enclosure requirements are confirmed by end-product testing to IEC 60695-2-11 at the product-specified glow-wire temperature, typically 650°C to 850°C depending on appliance standard and location. Terminal finished product types include motor brush holder housings, commutator support rings, and dryer sensor housing brackets.
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Encom Polymers EnLon PX50GF is a 50 wt% short-glass-fiber-reinforced amorphous polyamide compound supplied in cylindrical pellet form for injection molding and extrusion. The grade designation PX50GF identifies the amorphous nylon matrix and the nominal 50% E-glass fiber loading. Specific gravity determined by ASTM D792-20 is 1.56 g/cm³. Ash content by ASTM D5630-22 is 50% ±2%. Mold shrinkage measured on a 60 mm × 60 mm × 2 mm plaque according to ISO 294-4 is 0.2%–0.4% in the flow direction and 0.3%–0.5% transverse. The compound exhibits reduced shrinkage anisotropy relative to semi-crystalline polyamide 66 at equivalent glass loading. Published data for this specific configuration is limited; values listed are typical lot averages and should be verified against the current Encom Polymers certificate of analysis.
Pre-drying in a desiccant hot-air dryer with a dew point of -40°C is required to reach a final moisture content below 0.10% before melt processing. Drying at 80°C for 4–6 h is the standard set point. If ambient relative humidity exceeds 60%, drying time should be extended to 6 h and open hopper residence limited to 30 min. Inadequate drying produces splay, silver streaks, and reduced fiber-matrix adhesion at part weld lines.
Injection molding barrel temperatures from feed to nozzle are typically 260°C, 270°C, 280°C, and 275°C, with a melt temperature of 270–290°C and mold temperature of 80–110°C. Screw geometry should have an 18:1–20:1 L/D ratio, compression ratio 2.0:1, and a free-flow check ring. Hold pressure from 50 MPa to 80 MPa is used to prevent sink at bosses. Because the 50% glass fiber is abrasive, barrel, screw, shut-off nozzle, and check ring must be bimetallic or hard-chrome plated. Back pressure should remain between 0.5 MPa and 1.5 MPa to minimize fiber attrition. On 80-tonne hydraulic injection molding machines with a 20 mm diameter reciprocating screw, shot-to-shot mass variation was observed to increase from 0.05% to 0.12% when hold pressure was reduced below 40 MPa, causing sink marks at boss locations. Glass fiber accumulation in the check ring is a known failure mode when back pressure exceeds 1.5 MPa; this results in nozzle leakage and short shots. Residence time at melt temperature above 280°C should not exceed 8–10 min; thermal oxidation of the amorphous polyamide segment increases yellowness and brittleness.
Compounding on production-scale co-rotating twin-screw extruders with 40:1 L/D barrel length is conducted with a flat temperature profile of 250°C at the feed zone to 280°C at the die, with screw speed near 300 rpm. Low-shear distributive mixing elements are preferred over aggressive dispersive kneading blocks because the glass bundles are already wet by the amorphous nylon matrix; high shear reduces mean fiber length below 250 µm and decreases tensile strength. Clamp force requirement is approximately 0.8–1.2 tonnes/cm² of projected part area for filled amorphous nylon at 50 MPa cavity pressure.
Because of the high glass content, melt volume-flow rate measured by ASTM D1238-23 at 275°C and 5 kg is of limited value for quality control; spiral flow length in a 2 mm channel at 275°C melt and 80°C mold is a more discriminating test. Published data for this specific configuration is limited.
| Property | Test Method | Typical Value | Unit |
|---|---|---|---|
| Specific gravity | ASTM D792-20 | 1.56 | g/cm³ |
| Ash content | ASTM D5630-22 | 50 | % |
| Tensile strength at break | ASTM D638-14 Type 1, 5 mm/min | 200 | MPa |
| Tensile elongation at break | ASTM D638-14 Type 1 | 2.0 | % |
| Flexural strength | ASTM D790-17 Method 1 | 300 | MPa |
| Flexural modulus | ASTM D790-17 Method 1 | 15,000 | MPa |
| Notched Izod impact at 23°C | ASTM D256-10 Method A | 100 | J/m |
| Heat deflection temperature at 1.82 MPa | ASTM D648-18 | 230 | °C |
| Mold shrinkage, flow/transverse | ISO 294-4 | 0.2–0.4 / 0.3–0.5 | % |
Tensile and flexural values are conditioned at 23°C ±2°C and 50% ±5% relative humidity for 40 h per ISO 291 unless otherwise noted. The tensile elongation value of 2.0% indicates semi-brittle behavior under tensile loading; glass-fiber-reinforced amorphous polyamide parts should be designed with strain-based failure criteria rather than ultimate stress alone. Fiber orientation is determined by gate location and melt front advancement. Tensile specimens cut parallel to flow show the 200 MPa value; specimens cut transverse to flow may show tensile strength reduction of 20–30%. Mold-filling simulation with fiber orientation tensors and anisotropic material models is recommended for structural parts. At knit lines, bending modulus may be retained near 60% of the solid-section value; published data for this specific configuration is limited, and weld-line placement should avoid high-stress regions.
Applications for EnLon PX50GF include automotive mirror brackets, sensor housings, industrial pump volutes, valve bodies, and structural frames requiring flatness, stiffness, and resistance to aliphatic hydrocarbon fluids. The material is not recommended for continuous exposure to hot water, steam, strong mineral acids, or polar protic solvents; the amorphous polyamide segment is susceptible to hydrolysis at temperatures above 60°C in aqueous glycol. In multi-cavity tools with valve-gated hot runners, the reduced flow/transverse shrinkage differential simplifies tool maintenance of positional tolerances under ±0.05 mm per ASME Y14.5-2018, although published data for this specific configuration is limited. RoHS compliance and REACH SVHC status must be verified from supplier documentation under Directive 2011/65/EU and Regulation (EC) No 1907/2006.
| Material System | Tensile Strength (MPa, ASTM D638-14) | HDT at 1.82 MPa (°C, ASTM D648-18) | Flow/Transverse Mold Shrinkage (%, ISO 294-4) |
|---|---|---|---|
| EnLon PX50GF amorphous nylon 50% GF | 200 | 230 | 0.2–0.4 / 0.3–0.5 |
| Polyamide 66 50% GF semi-crystalline | 230 | 250 | 0.4–0.6 / 0.7–1.0 |
| PPA 50% GF high-heat aromatic | 230 | 270 | 0.3–0.5 / 0.5–0.7 |
| PBT 50% GF semi-crystalline polyester | 140 | 200 | 0.3–0.5 / 0.5–0.7 |
Comparative data are representative of commercially available 50% glass-filled grades and are not supplier-certified for every lot. The EnLon PX50GF amorphous nylon system trades approximately 30 MPa of tensile strength and 20°C of heat deflection temperature against a narrower shrinkage anisotropy ratio than polyamide 66. Against PPA, PX50GF processes at barrel temperatures 30–50°C lower but forfeits approximately 40°C of heat deflection. Against PBT, PX50GF provides higher heat deflection temperature and lower moisture-induced expansion but requires more aggressive drying and is less resistant to hot-water hydrolysis.
In optical sensor housings and large-area cover plates, post-mold flatness is governed by the differential between flow and transverse shrinkage. For EnLon PX50GF, the flow/transverse shrinkage ratio is approximately 1.2–1.5 compared with 1.7–2.2 for typical polyamide 66 50% GF. This difference reduces edge lift and warpage after ejector release. Tool design with cold sprue bushings or valve-gated hot runner systems should maintain uniform gate freeze times; gate freeze time for a 2 mm wall section at mold temperature 80°C is approximately 4–6 s. Mold temperature mapping with multi-circuit conformal cooling is used to hold cavity surface variation below ±5°C. Published data for this specific configuration is limited; process development on the actual tool is required.
Changeover from polyamide 66 50% GF to EnLon PX50GF should be performed with a commercial purging compound at 280°C; residual semi-crystalline nylon can delaminate at weld lines. Regrind usage is limited to 20 wt% maximum and only when the regrind is dry and free of mineral oil contamination. The compound should not be dry-blended with amine-based flame retardants or reprocessed from sprues and runners exceeding 3 mm length without granulation. Incompatible service environments include strong oxidizing acids, phenol, cresol, and hot aqueous glycol at temperatures above 60°C. End use compliance for food contact under FDA 21 CFR 177.1500 or EU 10/2011 must be confirmed from the supplier for each resin lot; the glass-filled amorphous nylon grade is not universally compliant.
