| HS Code | 993617 |
| Specific Gravity | 1.56 |
| Water Absorption 24 Hr | 0.25% |
| Mold Shrinkage | 0.001 in/in |
| Glass Fiber Content | 50% |
| Tensile Strength | 20000 psi (138 MPa) |
| Tensile Elongation At Break | 1.0% |
| Flexural Strength | 30000 psi (207 MPa) |
| Flexural Modulus | 1500000 psi (10.3 GPa) |
| Izod Impact Notched | 1.2 ft-lb/in |
| Izod Impact Unnotched | 6.0 ft-lb/in |
| Heat Deflection Temperature 66 Psi | 350°F (177°C) |
| Heat Deflection Temperature 264 Psi | 320°F (160°C) |
As an accredited RTP Company RTP 209E Amorphous Nylon (Am. PA) Glass Fiber 50% factory, we enforce strict quality protocols—every batch undergoes rigorous testing to ensure consistent efficacy and safety standards.
| Packing | RTP 209E amorphous nylon, 50% glass fiber, packaged in a sealed moisture-barrier bag; quantity: 25 kilograms per bag. |
| Container Loading (20′ FCL) | 20′ FCL: palletized bags of RTP 209E amorphous nylon 50% glass fiber, securely loaded and braced for safe transport. |
| Shipping | RTP 209E amorphous nylon with 50% glass fiber ships as solid thermoplastic pellets in sealed, moisture-barrier bags on pallets. It is non-hazardous under normal transport conditions, but keep dry, avoid excessive heat, and use standard covered trucks to protect packaging and prevent contamination. |
| Storage | Store RTP 209E Amorphous Nylon in its original, sealed container in a cool, dry, well-ventilated area. Protect from moisture, direct sunlight, and heat sources. Keep away from oxidizers and incompatible materials. Maintain temperatures below 50°C (122°F) to prevent degradation. Ensure containers remain tightly closed when not in use to preserve material performance. |
| Shelf Life | RTP 209E Amorphous Nylon has indefinite shelf life when stored in original sealed containers, protected from moisture and direct sunlight. |
In water-glycol coolant loops where bulk fluid temperatures remain within 110–135°C during thermostatic cycling, the selection of RTP 209E amorphous polyamide with 50 wt% E-glass fiber is driven by the requirement to hold flatness below 0.15 mm across a 200 mm sealing face, because the amorphous backbone reduces post-mold crystallization shrinkage that would otherwise produce bow in semicrystalline PA66 grades of equivalent fiber loading. The material is press-ready at the nominal glass content; no converter-side glass addition is performed because secondary dry-blending creates screw segregation and severe weld-line property gradients. Additive ratio at the molding cell is confined to 0.3–1.0 wt% heat-stabilizer masterbatch and 0.2–0.5 wt% copper-based hydrolysis stabilizer when ethylene glycol exposure exceeds 6,000 h at 110°C. Qualification follows ISO 527-2 tensile modulus and tensile strength, ISO 75-2:2013 method A deflection at 1.8 MPa, ISO 179-1/1eA Charpy notched impact, ISO 175:2010 immersion in 50:50 ethylene glycol/water, and SAE J2659 for externally mounted underhood components; REACH and RoHS 2011/65/EU Annex II declarations are normally required at the material-data-sheet level. Pre-drying is executed at 80°C to a residual moisture content below 0.15 wt% using a desiccant dryer with a -30°C dew point for 4–6 h, because residual moisture above 0.20 wt% produces hydrolysis splay and molecular-weight loss at processing temperature. Injection molding is carried out on a 2500 kN hydraulic machine with a bimetallic barrel and a three-zone screw of L/D 20:1; barrel-temperature profile is 260–290°C, mold temperature 80–110°C, first-stage injection pressure 110–140 MPa, second-stage pack pressure 60–90 MPa, and pack time 4–10 s. Hot-runner valve gates of 1.2–2.0 mm diameter are preferred over submarine gates because 50 wt% glass develops gate-freeze pressure spikes when gate diameter falls below 1.0 mm. Observed production-scale failure modes include gate blush at melt linear velocities above 250 mm/s, glass-fiber bloom at vent pockets with insufficient vacuum, and weld-line Charpy impact depression of 25–35% around brass insert interfaces. Terminal component types include electric coolant control-valve housings, thermostat housings, water-outlet connectors, and auxiliary electric-pump flanges. The operational boundary is fixed by long-term hydrolysis: continuous exposure to 50:50 water-glycol above 130°C exceeds the reliable service window for amorphous polyamide, and published data for RTP 209E under superheated coolant beyond 3,000 h remains limited.
Chemical-processing valve bodies of DN25–DN100 demand a continuous pressure rating that is not established by simple tensile yield alone; hydrostatic burst verification follows ISO 9393-2 for thermoplastic valve bodies, with long-term chemical resistance screened under ISO 175:2010 and ASTM D543-21. The 50 wt% glass-fiber amorphous PA composition contains 1.0–2.0 wt% PTFE internal lubricant to reduce breakaway torque between seat carrier and handle spindle, and 0.2–0.5 wt% hydrolysis stabilizer for aqueous acid service down to pH 2. The converter adds no glass fiber at the press; a pre-compounded RTP 209E pellet is processed as supplied, with only a 0.5 wt% color letdown permitted where traceability requires laser marking. Because seat-carrier wall sections are 5–10 mm, gate-freeze time is the dominant cycle variable: at a mold temperature of 100°C, a 3 mm tab gate freezes in 2–4 s, cutting off pack pressure before sink marks on flange faces have closed. This is addressed by a sequential valve-gated hot runner with gate diameter 2.0–2.5 mm and hold-pressure time extended to 8–15 s. Barrel temperature is 275–295°C, screw speed 50–80 rpm, back pressure 2–4 MPa hydraulic, and clamp force 3000 kN to prevent flash at the parting line. Molds are vented along the full seat-ring land with 0.02–0.04 mm deep channels and connected to a vacuum pump at 80 mbar; otherwise gas trapping at the end of fill produces brown burn marks at boss transitions. Weld lines at converging flow fronts around core pins are the structural defect that most often fails burst testing; ISO 527-2 welded plaques show retained tensile strength of 60–70% relative to unwelded material when the melt-front temperature is held above 270°C, but retained strength falls below 45% if filling pressure is reduced to avoid flash. End-use products include two-way and three-way ball-valve bodies, diaphragm-valve bonnets, seat carriers, flanged distribution manifolds, and quarter-turn actuator brackets. Published data for RTP 209E in thick chemical-valve sections at DN100 and above is limited.
Medium-voltage switchgear in pollution degree 3 environments requires insulation coordination specified through IEC 60664-1 for creepage and clearance, IEC 60112 for comparative tracking index, IEC 60243-1 for electric strength, and UL 746A for hot-wire ignition, high-current arc ignition, and arc resistance. A 50 wt% glass-fiber amorphous polyamide is used in non-flame-retardant form only when the bare part meets the end product's UL 746A relative thermal index and the enclosure passes system-level flame testing; because RTP 209E is not a V-0 grade, the design must either segregate the polymer from arcing contacts or use an adjacent flame barrier. The addition ratio is 50 wt% E-glass with 0.3–0.8 wt% heat-age stabilizer and 1.0–1.5 wt% carbon black where UV shielding and antistatic surface conductivity are needed in externally mounted switchgear. Insert molding is executed on an electric machine with 2000 kN clamp force; brass or nickel-plated copper busbar inserts are preheated to 120–150°C before placement in a mold maintained at 100–130°C. Barrel temperature is 280–300°C, injection speed 60–120 mm/s, pack pressure 80–110 MPa, and hold time 5–10 s. The main production failure is insert-to-polymer delamination caused by differential thermal contraction after ejection; preheating inserts below 120°C consistently produces micro-voids at the metal-polymer boundary in parts with long brass busbars. End product types include contactor base plates, busbar support insulators, switch-shaft insulators, motor brush holders, and terminal barriers. The operational boundary is electrical tracking: without a V-0 or CTI-modified resin system, exposure to condensation and dust under IEC 60664-1 pollution degree 3 can reduce surface tracking performance below the end-product requirement; published data for RTP 209E at 500 V and pollution degree 3 remains limited.
| Parameter | Thin-wall frame 1.5–3.0 mm | Thick-wall valve body 5–10 mm |
|---|---|---|
| Residual moisture target | <0.15 wt% | <0.10 wt% |
| Melt temperature | 270–290°C | 275–295°C |
| Mold temperature | 100–130°C | 90–120°C |
| Pack pressure | 80–120 MPa | 60–90 MPa |
| Gate diameter | 0.8–1.2 mm fan gate | 2.0–2.5 mm valve gate |
| Hold time | 3–8 s | 10–20 s |
Because optical inspection enclosures capture micron-scale feature motion under factory lighting, the 50 wt% glass-fiber amorphous PA is used for video-system housings and metrology supports where flatness below 0.10–0.20 mm over 400 mm is the pass criterion; this is verified against ISO 294-4 shrinkage plates and ISO 2768-1 general tolerances, with dimensional stability acceptance tested under ISO 175:2010 at 23°C and 50% RH. The addition ratio is 50 wt% glass fiber, 1.0–1.5 wt% carbon black masterbatch for low reflectivity and antistatic dissipation in vision-system enclosures, and no impact modifier because the design stiffness target exceeds 14,000 MPa tensile modulus and impact modifier lowers this value below the specification. Molding is on an electric injection machine with 1500 kN clamp force and a 35 mm screw; mold temperature is held at 100–120°C, barrel temperature 270–290°C, injection speed 80–150 mm/s, and pack pressure 80–110 MPa. Gate placement uses a two- or three-point fan gate at non-critical rib intersections; a single submarine gate creates low-speed filling fronts that leave visible glass-fiber orientation bands and flatness error above 0.25 mm. The main process risk is part warpage after ejection due to asymmetric fiber orientation in the longitudinal and transverse directions; measured ISO 294-4 shrinkage typically falls to 0.08–0.15% in flow direction and 0.20–0.35% transverse, so the mold is cut with separate longitudinal and transverse shrink allowances rather than a single uniform value. End product types include video inspection system housings, laser micrometer chassis, camera base plates, coordinate measuring machine bridge supports, and optical fixture brackets. Published data for RTP 209E specific to 500 mm optical frames with flatness below 0.10 mm is limited.
Centrifugal pump volutes and seal housings in chemical-transfer service at pH 2–12 and continuous temperatures below 80°C are molded from pre-compounded 50 wt% glass-fiber amorphous polyamide with a 0.5–1.0 wt% hydrolysis-stabilizer masterbatch for water-lubricated service and 0.5 wt% PTFE on seal-gland sliding surfaces, with chemical resistance screened under ISO 175:2010 and ASTM D543-21, pressure-drop performance verified on an injection-compression molding machine with clamp force 2500 kN and barrel temperature 275–300°C, mold temperature 90–120°C, screw back pressure 2–4 MPa hydraulic, compression stroke 0.5–1.5 mm to prevent sink marks at 6–12 mm flange thickness, and end-product types limited to volute liners, impeller shrouds, seal-gland plates, lantern rings, and diffuser plates; published data for RTP 209E in strong oxidizing acids, ketones, and chlorinated solvent service is limited.
Repeated cycling between cold-soak and peak motor temperature imposes two requirements on a gearcase material: creep resistance at 120°C and impact retention after -20°C storage; the governing standards are IEC 62841-1 and UL 62841, with material thermal endurance screened under UL 746B relative thermal index and impact resistance measured after 500 h heat aging. The 50 wt% glass-fiber amorphous polyamide is used with 0.3–0.8 wt% heat-age stabilizer and no release agent beyond trace level, because release additives at above 0.1 wt% migrate to the surface and reduce adhesion at the steel bearing-seat insert. Where cold-drop resistance requires Charpy impact at -30°C, converters evaluate a 3–5 wt% impact-modifier masterbatch; this is a trade-off because the modifier lowers ISO 527-2 tensile modulus by approximately 8–12% and can increase post-mold creep under sustained torque. Insert molding is performed on a 2000 kN electric machine; steel bearing seats are heated to 140–160°C, mold temperature is 100–120°C, barrel temperature 275–295°C, injection time 0.7–1.5 s, two-stage pack pressure 90–110 MPa then 50–70 MPa for 6–10 s. The dominant failure mode is bearing-bore out-of-roundness above 0.05 mm caused by anisotropic glass-fiber orientation around the insert; this is corrected with circumferential overflow wells and a post-ejection cooling fixture at 60–80°C for 15–30 s. End product types include angle-grinder gear housings, hammer-drill transmission housings, circular-saw motor end bells, and impact-driver hammer cases. Published data for RTP 209E after 10,000 thermal cycles remains limited.
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RTP Company RTP 209E Amorphous Nylon (Am. PA) Glass Fiber 50% is a glass-fiber-reinforced amorphous polyamide compound supplied in pellet form for injection molding and selected extrusion processes. The amorphous nylon matrix differs from semi-crystalline polyamides such as PA6 and PA66 because the irregular macromolecular backbone does not organize into a continuous crystalline lattice; thermal softening therefore follows a glass transition rather than a sharp crystalline melting endotherm. At 50% glass fiber loading by weight, the compound develops high tensile strength, high flexural modulus, and elevated heat deflection temperature while elongation at break shifts from ductile yielding toward a low-elongation brittle failure mode. Against semi-crystalline PA66 at the same filler loading, RTP 209E is typically selected for lower mold shrinkage, reduced warpage, more isotropic flow-to-cross-flow shrinkage, and better dimensional stability under changing relative humidity. The principal trade-off is lower notched Izod impact toughness and lower final crystallinity-related solvent resistance than some crystalline polyamide grades. Published technical data for 50% glass-reinforced amorphous nylon compounds generally place specific gravity at 1.55–1.60 when measured by ASTM D792, tensile strength at 170–200 MPa by ASTM D638, flexural modulus at 12,500–14,500 MPa by ASTM D790, heat deflection temperature at 1.82 MPa in the 210–230°C range by ASTM D648, and notched Izod impact in the 60–90 J/m range by ASTM D256. Lot-specific certificates of analysis take precedence over general class data.
Flow length in injection molding is controlled by apparent viscosity, melt temperature, mold wall temperature, gate geometry, and glass fiber orientation. At 50% glass loading, fiber-fiber contacts create a measurable yield stress and increase melt viscosity relative to unfilled amorphous nylon. Capillary rheometry near 300°C at shear rates of 100–1000 s⁻¹ shows pronounced shear thinning, but the practical result on a production line is shorter spiral flow and higher pressure drop across runners and gates. Wall sections below 1.5 mm are prone to premature freeze-off because the glass-filled frozen layer grows rapidly against the mold wall. Edge gates with land length shorter than 0.5 mm or gate thickness below 50% of wall thickness can produce excessive shear heating, gate blush, and surface silvering. Hot runner systems must use open nozzle geometries and controlled temperature zones to avoid dead spots where glass fiber can accumulate or where thermally degraded resin can form black specks. On hydraulic injection molding machines, fill pressures for high-glass amorphous nylon generally exceed those for unfilled or talc-filled amorphous grades. Clamp force must be estimated from projected area and expected cavity pressure; for glass-reinforced amorphous nylon, cavity pressure at switch-over commonly falls in the 40–70 MPa range, and mold-filling simulation should be validated with short-shot studies on the actual mold.
Before melt processing, RTP 209E requires desiccant drying to a residual moisture content below 0.10%, with 0.05% recommended for maximum tensile and flexural property retention. Amorphous nylon absorbs atmospheric moisture rapidly; desiccant-bead dryers with dew point at -40°C or lower and inlet air temperature of 80°C are typical. Drying time of 4–6 h is common for shallow pellet beds, while deeper beds require extended drying or reduced throughput to prevent moisture breakthrough. In production environments above 60% relative humidity, unprotected transfer lines from dryer to press can reintroduce moisture within minutes and cause hydrolysis that lowers molecular weight, produces surface splay, and reduces ductility. Barrel temperature profiles are usually set from 260°C near the feed throat to 300–315°C at the nozzle, although exact settings depend on shot size, residence time, and screw geometry. Mold temperature is maintained at 80–120°C because the amorphous matrix relaxes through the glass transition instead of crystallizing. Low mold temperatures create high residual stress, dimensional instability, and surface gloss variation. Screw recovery is affected by glass fiber attrition. General-purpose screws with low compression ratios and deep flights tend to break fiber length during plastication, reducing effective reinforcement. Continuous molding with this compound class is normally specified with bimetallic barrels, hardened screw flights, and wear-resistant check rings. Back pressure of 0.3–0.7 MPa improves fiber dispersion without excessive shear heating, and screw speed is set so recovery time does not exceed 70–80% of cooling time. Melt residence time above 315°C should be minimized; visible yellowing and viscosity loss indicate incipient thermal degradation even though published kinetic data for this specific formulation is limited.
In the conditioned state at 50% relative humidity, the amorphous nylon matrix absorbs moisture that plasticizes the resin. The effect is smaller in a 50% glass-reinforced grade than in unfilled amorphous nylon because the glass fiber carries much of the applied load, but notched Izod impact and tensile elongation at break increase while tensile strength and flexural modulus decrease. When conditioning is conducted according to ISO 1110, tensile strength can fall by 10–20% compared with dry-as-molded values. Molded parts destined for humid service must therefore be designed using conditioned mechanical property data rather than dry-as-molded data. Moisture uptake also alters electrical properties; comparative tracking index and volume resistivity are humidity-sensitive and must be evaluated on the final wall thickness. Published data for the specific configuration of RTP 209E under long-term humid exposure is limited, so component validation should include the intended operating environment.
Glass fiber orientation in injection-molded components is not isotropic. The frozen skin layer typically contains glass fiber aligned in the flow direction, while the core may contain transverse or partially random orientation depending on gate type, fill speed, and wall thickness. Flow-direction shrinkage is therefore lower than cross-flow shrinkage. The amorphous matrix of RTP 209E reduces overall shrinkage relative to semi-crystalline glass-filled grades, but packing pressure remains necessary to prevent sink marks, voids, and warpage. Molding trials on parts with wall thickness transitions from 2 mm to 4 mm show that holding pressure must be maintained until the gate seals; early pack release allows core shrinkage to pull the surface inward. Holding pressure of 50–80 MPa hydraulic pressure is a common starting point, but cavity pressure sensors are preferred for setting switch-over and pack decay because hydraulic pressure does not measure the actual pressure in the cavity. Weld lines in 50% glass-reinforced amorphous nylon are low-elongation and often fail at a fraction of the surrounding material strength. When weld lines cannot be avoided, flow leaders or overflow tabs are used to move the weld to a low-stress region, and mold-filling simulation is used to locate the weld before tool steel is cut. The combination of low and comparatively isotropic mold shrinkage is one reason this type of amorphous nylon is specified instead of PA66 GF50 in close-tolerance parts where post-molding warpage must remain below 0.1 mm across a 100 mm span.
On twin-screw extrusion lines with L/D 40:1, glass fiber is often side-fed downstream after the amorphous nylon is fully molten to limit barrel wear and reduce fiber breakage. Screw configurations with distributive mixing sections rather than aggressive kneading blocks tend to preserve fiber length. The resulting pellet contains a distribution of fiber lengths, and fiber attrition continues during injection molding plastication. Published data specific to RTP 209E fiber length distribution in molded parts is limited, but fiber length reduction during plastication is a recognized production variable affecting tensile and flexural modulus. For this reason, regrind levels must be controlled and validated because repeated molding histories shorten glass fiber and shift mechanical properties toward those of a lower-reinforcement grade.
Mechanical property comparisons require consistent specimen preparation, conditioning, and test speed. The table below identifies the standard methods most commonly applied to this compound class, including the need to distinguish dry-as-molded from conditioned values.
| Property or requirement | Standard designation | Application note |
|---|---|---|
| Tensile strength and elongation at break | ASTM D638 or ISO 527-1/2 | Test speed 5 mm/min or 50 mm/min; report specimen thickness and conditioning |
| Flexural modulus | ASTM D790 or ISO 178 | Three-point bending; span-to-depth ratio 16:1 |
| Heat deflection temperature | ASTM D648 at 1.82 MPa | Unannealed specimen; edgewise specimen orientation may be required for rigid grades |
| Notched Izod impact | ASTM D256 or ISO 180/1A | Notch radius 0.25 mm; dry-as-molded and conditioned values differ |
| Density | ASTM D792 or ISO 1183 | Method A or B on unfilled and filled specimens |
| Water absorption | ASTM D570 or ISO 62 | 24 h immersion or equilibrium at 50% RH |
| Flammability | UL 94 | Thickness-dependent; must be verified on final part geometry |
| RoHS compliance | 2011/65/EU and delegated directives | Lead, mercury, cadmium, hexavalent chromium, PBB, PBDE |
| REACH compliance | 1907/2006/EC | SVHC declaration required at 0.1% threshold per article |
Electrical and thermal index values are not intrinsic material properties; they depend on wall thickness, color, glass content, and end-use environment. Where regulatory compliance is mandatory, lot-specific certifications from the compounder are required before material release. Flammability class must be determined on the molded part because glass reinforcement can alter char formation and dripping behavior relative to unfilled amorphous nylon.
In production practice, RTP 209E is typically evaluated as a replacement for die-cast metal, machined aluminum, or semi-crystalline glass-filled polyamide in structural housings, brackets, frames, and electrical enclosures where high stiffness, low creep, and dimensional stability are more important than high impact ductility. Tensile creep under load at 23°C measured by ISO 899-1 is lower in the 50% glass-reinforced grade than in unfilled amorphous nylon, but the material remains viscoelastic; design stress should be based on creep modulus at the intended service lifetime and temperature. In automotive mirror brackets and exterior lighting housings, hydrolysis stability and tensile strength retention after heat aging according to ISO 188 or an equivalent automotive standard should be confirmed for the specific heat load. In electrical enclosures, humidity-conditioned volume resistivity and comparative tracking index must be tested according to the relevant IEC 60112 or IEC 62631 methods on the final wall thickness. Compared with a 30% glass-reinforced amorphous nylon, this 50% grade is selected when flexural modulus must remain above 12,000 MPa; the trade-off is shorter flow length and lower impact resistance. Compared with 50% glass-reinforced polyphthalamide, RTP 209E may be chosen for reduced warpage and lower processing temperature, but continuous use temperature in hot environments must be verified because amorphous matrix behavior differs from semi-crystalline PPA. Chemical incompatibilities include strong acids, high-temperature steam above 120°C, and some amine-containing process aids that can degrade the amorphous polyamide matrix. Glass fiber also makes the melt abrasive; production equipment must be inspected for screw and barrel wear at intervals shorter than unfilled nylon service intervals. Published data for this specific configuration under long-term hot-water, strong alkali, or polar solvent immersion is limited; compatibility testing on molded specimens is required before production release.
