| HS Code | 229728 |
| Density | 1.20 g/cm³ |
| Tensile Strength | 117 MPa (17,000 psi) |
| Flexural Strength | 169 MPa (24,500 psi) |
| Flexural Modulus | 5.5 GPa (800,000 psi) |
| Elongation At Break | 2.0% |
| Izod Impact Notched | 75 J/m (1.4 ft-lb/in) |
| Heat Deflection Temperature 1 8 Mpa | 130°C (266°F) |
| Glass Transition Temperature | 125°C (257°F) |
| Water Absorption 24 Hr | 0.30% |
| Dielectric Strength | 17 kV/mm (430 V/mil) |
| Volume Resistivity | 10^16 Ω·cm |
| Flammability Rating | UL94 V-0 (1.6 mm) |
| Mold Shrinkage | 0.2–0.4% |
| Glass Fiber Content | 20% |
As an accredited RTP Company RTP 203E Amorphous Nylon (Am. PA) Glass Fiber 20% factory, we enforce strict quality protocols—every batch undergoes rigorous testing to ensure consistent efficacy and safety standards.
| Packing | Packaged in 25 kg moisture-barrier polyethylene-lined woven polypropylene bags, sealed to prevent moisture absorption and maintain consistent glass fiber reinforcement. |
| Container Loading (20′ FCL) | 20' FCL: 20% glass fiber amorphous nylon in bags, loaded and secured on pallets, ensuring safe transport. |
| Shipping | Ship RTP 203E as a non-hazardous thermoplastic compound in sealed, moisture-proof bags or drums. Store in a dry, cool area, away from direct sunlight. Protect from crushing and contamination. Ensure proper labeling and documentation for freight, avoiding exposure to high humidity or extreme temperatures during transit. |
| Storage | Store RTP 203E Amorphous Nylon in its original, sealed container in a cool, dry area away from direct sunlight and heat sources. Keep the material protected from moisture, as amorphous nylon absorbs humidity. Maintain temperatures below 30°C (86°F) and avoid condensation. Use within recommended shelf life, resealing after each use. |
| Shelf Life | Shelf life is indefinite when stored sealed, cool, and dry; however, amorphous nylon absorbs moisture, so dry before processing. |
Mass-produced underhood connectors require a moulding resin that holds terminal hole true position after thermal cycling from −40°C to 125°C. The 20 wt% glass fibre in amorphous nylon reduces linear mould shrinkage to approximately 0.25–0.45% measured in the flow direction, while transverse shrinkage typically runs 0.45–0.65%. That difference is not a defect; it is the fibre orientation state across multi-cavity tooling. A gate placed at the longitudinal end of an eight-cavity connector housing produces parallel glass fibre alignment along terminal channels, raising flexural modulus to roughly 6,000–7,000 MPa per ISO 178, but it also concentrates weld-line weakness at core-pin interruptions. Those weld regions commonly retain 60–70% of parent tensile strength in short-fibre polyamide systems when tested per ISO 527-2, so pin positions are shifted into low-stress webs rather than latch arms. Injection moulding units with 18–22 mm screw diameters and L/D ratios of 20:1 to 24:1 are preferred for shot sizes below 25 g; longer residence times degrade amorphous nylon and shift colour. Melt temperature at the nozzle is held between 260°C and 285°C, and the mould is run at 70–90°C to stabilise amorphous morphology and avoid sink over ribs. Pre-drying is mandatory at 80°C for 4 h or until moisture falls below 0.10 wt%; higher moisture produces silver streaks and weakens fibre-matrix adhesion. The terminal products include engine control module connector housings, wheel speed sensor bodies, and transmission solenoid bobbins. USCAR-2 and LV214 connector validation require pin retention and water ingress tests, but RTP 203E must be evaluated against the specific OEM temperature profile because published data for this specific configuration is limited for 150°C dwell beyond 1,000 h.
Insert moulding of Cu-ETP strips into a 20% glass-filled amorphous nylon frame introduces differential thermal expansion because copper expands at approximately 17 × 10⁻⁶ K⁻¹ while the polymer composite expands at 25–35 × 10⁻⁶ K⁻¹ below glass transition. The interfacial shear stress at strip ends can crack bosses during −25°C tests when evaluated per IEC 60068-2-1 Test Ab if the boss wall thickness is below 1.5 mm. RTP 203E is not classified as a UL 94 V-0 material in standard documentation; arc and glow-wire requirements for the final device remain dependent on enclosure design and additional flame-retardant grades. Where end-product insulation requires IEC 60112 tracking resistance, a comparative tracking index of at least 400 V is targeted for reinforced insulation, but lot certification must be requested. The amorphous nylon shrinkage anisotropy is lower than that of semi-crystalline PA66, reducing contact pad movement after moisture cycling, but the fibre geometry still causes flow-direction dependent warpage in thin sections below 1.0 mm. A family mould with 8 cavities and two-platen clamp force of 80–150 t typically uses a melt cushion of 3–5 mm and hold pressure of 50–70 MPa to avoid overpacking gate areas. Terminal products include miniature circuit breaker frames, auxiliary contact bases, and arc chute supports.
| Property | Test standard | Acceptance condition |
|---|---|---|
| Dimensional stability | IEC 60068-2-14 Test Na | Functional dimension change < 0.1 mm after 10 cycles |
| Glow wire | IEC 60695-2-11 | No ignition at 650°C or 850°C depending on insulating part |
| Tracking resistance | IEC 60112 | CTI ≥ 400 V for reinforced insulation |
In low-pressure analytical and process chromatography fluid paths, 20% glass-reinforced amorphous nylon is substituted for die-cast aluminium or PPS where the wetted stream is a non-halogenated organic solvent mixture at ambient temperature. The resin selection logic is governed by ISO 175 chemical immersion data, not by tensile data alone; mass change after 7-day immersion in n-hexane or 2-propanol is typically below 1.5% for the amorphous PA class, while strong mineral acids and hot water above 60°C are outside continuous service boundaries. Injection moulding of pump volute liners and metering valve bodies involves wall sections from 4 mm to 12 mm, which require pack pressure in the lower end of the range to avoid glass fibre migration. The use of 20 wt% short glass fibre raises hydrostatic burst strength relative to unreinforced amorphous nylon, but weld lines at impeller shaft bores remain the primary leak path. Moulders reduce that failure by placing opposing hot drops at the bore perimeter and programming a 0.1–0.3 s velocity-to-pressure switchover to prevent jetting. The terminal products include chemical metering pump housings, filter heads, and volumetric flowmeter bodies.
For tumble dryer drum roller brackets, the resin is selected for creep resistance at 80°C; no further elaboration is required beyond verifying a UL 94 HB rating at 1.5 mm according to the appliance manufacturer's end-product standard.
In automated diagnostic analyser chassis plates, a 20% glass-filled amorphous nylon is evaluated for dimensional reproducibility after exposure to 50% RH and 23°C per ISO 291. Moisture uptake in the amorphous PA class is lower than that of PA66 but sufficient to produce 0.2–0.4% dimensional change on large flat panels; design allowances of 0.15 mm per 100 mm of unsupported span are typical. Processing with sequential valve gating across a 300 mm × 400 mm panel of 2.5 mm nominal wall reduces knit-line visibility and brings bow under 0.8 mm for a flatness fixture. Melt residence time is held below 5 minutes at 270–280°C to limit aldehyde and low-molecular-weight oligomeric outgassing. If the part is designated as a patient-contact accessory, ISO 10993-5 and ISO 10993-12 evaluation becomes mandatory because RTP 203E does not carry a supplier-side USP Class VI designation in standard documentation. Terminal products include immunoassay analyser chassis plates, robotic pipettor frames, and reagent tray substructures.
In high-voltage battery pack cell retainer spacers, the material must maintain electrical insulation and creep resistance under constant compression from −20°C to 85°C. The 20% glass reinforcement in amorphous nylon provides a static coefficient of friction against nickel-plated copper busbars that is low enough for automated cell insertion, but the fibre ends can abrade busbar coatings during vibration tests; therefore mating surfaces are textured with VDI 3400 reference 24–27 polish or assembled with polyester film interliners. Continuous use voltage below 60 V DC is consistent with the material's intended role as an insulating spacer, but comparative tracking index and volume resistivity must be verified per IEC 60112 and IEC 62631-3-1 on finished parts. Injection moulding of thin ribs at 0.8–1.2 mm nominal thickness demands high melt velocity and mould temperature of 80–100°C to avoid short shots; the trade-off is increased shear heating and fibre length attrition. Batch-to-batch variance in glass fibre length distribution is controlled by the compounder within ±15% of median fibre length, but published data for RTP 203E in this specific battery configuration is limited. Terminal products include prismatic cell retainer spacers, module end-plate insulators, and busbar support rails.
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RTP Company RTP 203E is a glass-fiber-reinforced amorphous polyamide compound containing a nominal glass fiber loading of 20% by weight. The amorphous polyamide matrix suppresses crystalline solidification during cooling, producing lower and more isotropic mold shrinkage than that observed in semi-crystalline PA 66 or PA 6 grades at the same filler loading. Commercial technical bulletins for 20% glass-reinforced amorphous polyamide compounds typically report a density of 1.26–1.30 g/cm³ according to ISO 1183-1, tensile stress at break of 125–150 MPa under ISO 527-2/1A, flexural modulus of 6.0–7.5 GPa using ISO 178, notched Charpy impact of 8–12 kJ/m² by ISO 179/1eA, and heat deflection temperature at 1.80 MPa of 195–220°C per ISO 75-2/A. Published data for this specific RTP 203E configuration is limited to lot-specific certificates; the ranges above represent the product-family envelope and must not replace approved part drawings or first-article inspection records.
For melt-processing operations, the material is supplied in pellet form and requires closed-loop drying to a moisture content below 0.10% by weight. A desiccant dryer with a dew point of -40°C or lower and a bed temperature of 80°C for 4–6 h is the minimum starting condition; residence at 100°C beyond 8 h can generate oxidative yellowing and melt-viscosity drift. Moisture level at the feed throat should be confirmed by Karl Fischer titration or a calibrated moisture analyzer before startup.
The primary distinction in molded article performance is matrix phase behavior rather than filler content. In semi-crystalline PA 66 at 20% glass fiber, crystalline regions act as physical tie points that raise heat deflection temperature under load and reduce solvent penetration, but they also introduce differential shrinkage between flow and transverse directions and can cause post-mold dimensional movement as secondary crystallization proceeds. Amorphous polyamide lacks long-range crystalline order, so mold shrinkage measured by ISO 294-4 is typically 0.30–0.50% in the flow direction and 0.45–0.65% transverse, compared with 0.50–0.70% and 0.70–0.90% for equivalent PA 66 GF20 compounds. The reduction in shrinkage anisotropy improves flatness and hole-to-hole registration, but it is accompanied by lower resistance to polar solvents and glycol/water mixtures under stress.
| Property | Method | Am. PA GF20 | PA 66 GF20 | PBT GF20 |
|---|---|---|---|---|
| Density | ISO 1183-1 | 1.26–1.30 g/cm³ | 1.28–1.32 g/cm³ | 1.45–1.50 g/cm³ |
| Tensile stress at break | ISO 527-2/1A | 125–150 MPa | 120–145 MPa | 100–115 MPa |
| Flexural modulus | ISO 178 | 6.0–7.5 GPa | 5.0–6.8 GPa | 4.5–5.5 GPa |
| Heat deflection temperature at 1.80 MPa | ISO 75-2/A | 195–220°C | 230–250°C | 195–215°C |
| Mold shrinkage, flow direction | ISO 294-4 | 0.30–0.50% | 0.50–0.70% | 0.35–0.55% |
The values in the table are envelope ranges from supplier technical bulletins for dry-as-molded specimens and do not represent a contractual specification. Fiber orientation, thickness, and mold temperature can shift each property by more than 10% in a cavity-specific manner.
For multi-cavity electrical connectors, sensor housings, pump bodies, and thin-wall enclosures where flatness over a 150 mm span must remain below 0.25 mm and hole-to-hole registration must hold within ±0.10% of nominal, the amorphous PA matrix provides a measurable advantage. The absence of spherulitic growth reduces the difference between flow and transverse shrinkage to approximately 0.10–0.20 percentage points, compared with 0.20–0.30 percentage points for PA 66 GF20. This improves roundness retention in molded bores and reduces edge lifting after conditioning at 23°C and 50% relative humidity for 48 h per ISO 291.
However, the material should not be specified for continuous immersion in hot water or glycol solutions without component testing. Chemical-resistance evaluations under ISO 175 or ASTM D543 have shown amorphous nylons to be more susceptible to environmental stress cracking in polar media than PA 66 at the same 20% glass loading. For hot-air service above 120°C under constant load, tensile creep and stress relaxation should be measured per ISO 899-1; the absence of crystalline anchors reduces creep resistance at elevated temperature. Flammability of a natural 20% glass-filled amorphous polyamide is typically classed at UL 94 HB and should not be presumed to meet V-0 without documented additive modification.
Production-scale injection molding experience with 20% glass-reinforced amorphous polyamide on presses ranging from 1,000 kN to 2,500 kN clamp force indicates a narrower processing window than PA 66 GF20 because the amorphous matrix transitions into a low-viscosity melt without the lubrication effects of crystallite melting. Barrel temperatures from rear to nozzle are commonly set between 250°C and 285°C, with melt temperature measured at the nozzle held between 265°C and 285°C. Temperatures above 300°C accelerate chain scission and release ammonia and low-molecular-weight amide degradation products that contribute to splay and mold deposit. Mold temperature should be maintained at 80–100°C for dimensional repeatability; lower mold temperatures, particularly below 60°C, produce rapid surface freezing, reduce gloss, and increase anisotropic shrinkage. Back pressure of 0.3–0.7 MPa hydraulic pressure is normally sufficient to homogenize the melt without excessive shear heating. Shot size should occupy 40–70% of barrel capacity, and total residence time should remain below 8 min at melt temperature; longer residence shifts viscosity and darkens the melt. Screw recovery speed should be set so that actual screw surface velocity does not exceed 0.2 m/s, and the screw should use a low-compression, hard-chrome-plated flight geometry with a free-flow nonreturn valve.
Batch-to-batch variation in glass-fiber length distribution after compounding on a twin-screw extruder with an L/D ratio of 40:1 can shift melt viscosity by roughly 10–20% at 1,000 s⁻¹ shear rate. In-mold pressure sensors are therefore preferred over screw-position-only transfer control; switch-over should be set at 90–95% of cushion volume or at a cavity pressure threshold of 40–60 MPa depending on gate geometry. Hold pressure is typically 60–80% of peak injection pressure, with hold time established by gate seal rather than part dimension alone. These parameters are starting conditions and require confirmation on the actual tool because amorphous nylon grades do not crystallize at a sharp temperature and are more sensitive to cooling-rate history than their semi-crystalline counterparts.
Although RTP 203E is specified for dimensional stability in molded parts, moisture regain still produces measurable swelling. At equilibrium in 23°C and 50% relative humidity, typical 20% glass-reinforced amorphous polyamide absorbs 0.4–0.8% moisture by weight, producing linear expansion that can exceed 0.05% in long thin sections. Conditioning protocols based on ISO 1110 should therefore be applied before critical dimensional audit, not after dry-as-molded measurements alone. Weld-line strength is a further boundary condition: in components with multiple gates or core holes, tensile strength at the knit line can be reduced by 30–50% relative to the bulk value measured by ISO 527-2/1A. Gate placement should move weld lines away from pressure-bearing areas or use sequential valve-gate actuation.
Regulatory verifiability requires review of the specific lot formulation. The base polyamide polymer may comply with FDA 21 CFR 177.1500 for nylon resins when used within specified end-use conditions, but this does not automatically extend to every additive package or colorant. European Union compliance is commonly documented against REACH Regulation (EC) No 1907/2006 and RoHS Directive 2011/65/EU Annex II restriction limits; supplier certificates should be requested for each production batch. For food-contact or medical-device applications, migration testing under Commission Regulation (EU) No 10/2011 or ISO 10993-1 remains the responsibility of the finished-device manufacturer.
The grade is applied in dimensionally critical structural components in which semi-crystalline PA 66 GF20 would generate unacceptable post-mold warpage or require secondary straightening. Typical usage areas include precision pump housings, electrical connector frames, fluid-metering bodies, and thin-wall control housings; each application must be validated using the actual tool and the actual lot because glass-fiber orientation changes with gate location and thickness. Compared with a 20% glass-fiber-reinforced PBT, the amorphous polyamide grade typically offers higher heat deflection temperature at 1.80 MPa but lower resistance to hydrolysis and hot water. Relative to 20% glass-fiber-reinforced PPA, the amorphous PA trade-off is lower tensile strength and continuous-use temperature; PPA variants may reach 250°C HDT but require melt temperatures above 315°C, which limits tooling or hot-runner choices. Against unfilled amorphous polyamide, the 20% glass loading raises flexural modulus by approximately 2.5–3.0× and lowers mold shrinkage by 0.20–0.30 percentage points, while reducing tensile elongation at break to less than 3.0% under ISO 527-2/1A. For parts with wall stocks below 1.0 mm, flow-length limits and weld-line retention become dominant design drivers; cavity-pressure monitoring is applied to maintain uniform solidification.
