| HS Code | 350866 |
| Manufacturer | RTP Company |
| Product Designation | RTP 299 E X 141359 F |
| Material Type | Amorphous Nylon (PA) |
| Color | Transparent |
| Esd Protection | Permanently Static Dissipative |
| Surface Resistance | 10^6 - 10^9 ohms/sq |
| Specific Gravity | 1.09 g/cm³ |
| Tensile Strength | 60 MPa |
| Elongation At Break | 20% |
| Flexural Modulus | 2.4 GPa |
| Izod Impact Notched | 5.0 kJ/m² |
| Heat Deflection Temperature At 264 Psi | 110 °C |
As an accredited RTP Company RTP 299 E X 141359 F Amorphous Nylon (PA); ESD Protection - Permanently Static Dissipative - Transparent factory, we enforce strict quality protocols—every batch undergoes rigorous testing to ensure consistent efficacy and safety standards.
| Packing | Sealed moisture-barrier aluminum foil bag containing 25 kg of transparent amorphous nylon pellets, with desiccant, labeled for ESD protection. |
| Container Loading (20′ FCL) | Loading 20′ FCL with RTP 299 E X Amorphous Nylon PA: ESD dissipative, transparent. Secure drums, palletized, ventilated, labeled safely. |
| Shipping | Ship as non-hazardous plastic pellets in sealed, labeled containers. Protect from moisture and excessive heat. Use standard dry van or enclosed transport. Avoid exposure to rain or condensation. Ensure proper documentation with product name, lot number, and ESD designation. Handle with care to preserve transparency and static-dissipative properties during transit. |
| Storage | Store in a cool, dry area in original sealed containers to prevent moisture absorption. Avoid direct sunlight, heat sources, and static-generating environments. Keep containers tightly closed when not in use. Handle with clean, dry tools; protect from mechanical damage. No special temperature requirements, but ambient conditions around 20–25°C are recommended. |
| Shelf Life | Shelf life is typically two years from manufacture when stored sealed, dry, and cool, away from moisture and sunlight. |
In semiconductor front-end handling, wafer cassettes, transfer nests, and edge-contact separators are specified to operate within an electrostatic protected area defined by IEC 61340-5-1. Clear static-dissipative amorphous nylon compounds are molded into these components because surface resistivity can be maintained in the 1×10^6 to 1×10^9 Ω/sq range when tested per ANSI/ESD STM11.11 or IEC 61340-2-3. The permanent static-dissipative mechanism does not rely on ambient humidity; therefore charge decay is less sensitive to the 30–50% RH conditions common in front-end cleanrooms. Wafer contact generates tribocharge through repeated sliding against silicon edges and cassette walls; an insulating clear material would retain that charge. In this compound, static dissipation occurs through a controlled SD additive network within the amorphous polyamide matrix, with electrostatic decay typically evaluated from ±1000 V to <100 V per IEC 61340-2-1. Dimensional control is critical because a warped separator can misalign 300 mm wafers; production fixtures should be checked after conditioning at 23°C and 50% RH per ISO 291, because polyamide moisture uptake alters post-molding dimensions. Published data for this specific 141359 F grade may be limited; tooling engineers should request lot-specific surface resistivity verification on molded plaques before cutting steel. Isopropyl alcohol wipe-down is normally compatible, whereas abrasive cleaners containing alumina or silica should be avoided because they can micro-roughen the transparent surface and create haze. In front-end wet bench environments, prolonged exposure to hot sulfuric acid-peroxide mixtures must be avoided; the material has no meaningful resistance to strong oxidizing acids at concentrations above 10%.
| Property | Standard / method | Acceptance window |
|---|---|---|
| Surface resistivity | ANSI/ESD STM11.11, IEC 61340-2-3 | 1×10^6–1×10^9 Ω/sq |
| Static decay | IEC 61340-2-1 | <2 s from ±1000 V to <100 V |
| Conditioning | ISO 291 | 23°C, 50% RH before dimensional audit |
| Optical transmittance | ASTM D1003-23 | Lot-specific; haze increase after molding should not exceed supplier baseline |
In display lamination workcells, transparent covers over alignment stages are replaced when polycarbonate shows stress crazing from isopropanol-based cleaning wipes. The amorphous polyamide structure of 141359 F is used as an alternative because it does not display the same rapid craze propagation in thin sections under clamp loads below 0.4 MPa that is observed in some clear polycarbonate grades. Covers in these workcells must remain clear for polarizer positioning and adhesive fill inspection. The static-dissipative surface prevents floating tribocharge from release liners and bonding films from adhering to the cover underside; surface resistivity should be verified in the 1×10^6–1×10^9 Ω/sq range using IEC 61340-2-3. A thick polyamide cover will take up moisture and shift dimensionally after leaving a dry molding room; post-molding conditioning at 23°C/50% RH per ISO 291 is required before final fit checks. Hot-runner direct gates in the optical zone are not recommended because the resulting gate blush can act as a light-scattering site; valve-gated sub-gates near the part perimeter reduce this failure mode. The optical path length in a display workcell cover is normally 2.5–4.0 mm; at that thickness, polyamide can show a small reduction in total transmittance compared with glass or impact-modified acrylic. Published data for this specific formulation is limited, so ASTM D1003-23 transparency should be confirmed on first-article samples. Polarized light inspection of molded covers can reveal birefringence from high packing pressure; lowering pack pressure until the gate freeze time matches the mold flow simulation often reduces this optical defect.
Guidance sensors on automated guided vehicles and mobile robots use transparent front windows that operate in narrow-aisle warehouse racking and freezers. If the window is made from insulating polycarbonate, the window body can attract airborne particles that produce false-positive obstacle signals. The 141359 F amorphous nylon window is static dissipative, so charge from moving conveyors and wheel-driven floor dust is drained to the AGV chassis ground path rather than accumulating on the optical face. The housing must survive vibration; amorphous nylon is notch sensitive, so bosses and snap fits require generous radii. In this application, the nominal wall is typically 2.0–3.0 mm; below 1.5 mm, flow hesitation can create knit lines that reduce both static dissipation and clarity. Tooling should be designed with a single end gate and a melt temperature held near the low end of the supplier's recommended range to limit yellowing. The charge decay requirement can be audited from ±1000 V to <100 V per IEC 61340-2-1. An insulating clear sheet can hold charge for tens of seconds at <33% RH, while permanent SD material decays within 2 s under similar conditions; however, published data for this exact grade should be confirmed on final housing assemblies. Many AGV qualification paths include cold storage where ambient humidity is low; the ESD performance of this compound is intended to depend on permanent dissipation rather than humidity, so surface resistivity remains measurable in dry air. Cleaning specifications should avoid abrasive pads; wipe marks at the sensing aperture create the same false-positive risk as dust and cannot be removed by polishing within the field.
Inline defluxing systems run saponifier-based solutions at 45–60°C to remove no-clean flux residues from surface mount assemblies. Transparent polymer carriers allow manual line auditors to verify board alignment through rack walls without opening the hood. Fluoropolymer racks provide chemical resistance but are electrically insulating; a permanently static dissipative amorphous nylon can reduce charge accumulation when boards are inserted by high-speed pick-and-place fixtures. However, nylon is a polyamide and can undergo hydrolysis in hot alkaline baths; therefore this application is not recommended for caustic concentrations above pH 10 at temperatures above 70°C. Long-term extraction data for this specific 141359 F material in aggressive defluxing chemistry is limited, so the carrier should be soaked in the production bath chemistry for an extended interval followed by dimensional and surface resistivity checks. Transparent SD amorphous nylon does not contain fiber reinforcement because fiber would reduce clarity; consequently the rack must compensate for lower flexural modulus through thicker ribs or metal stiffeners. Warpage in large flat rack walls can be controlled by using sequential valve gating rather than a single center sprue. The material should be dried to a residual moisture level below 0.10% prior to molding; wet pellets will produce splay and weakly bonded knit lines that later become sites for chemical attack in the wash cabinet.
Diagnostic analyzer covers in clinical laboratories are specified to prevent static-induced dust deposition in fluorescence and bright-field imaging paths. The cover is located near photomultiplier tubes or CMOS image sensors where a sudden electrostatic discharge can corrupt signal output. The permanent static dissipative surface maintains surface resistivity within 1×10^6–1×10^9 Ω/sq as measured per IEC 61340-2-3, ensuring charge does not accumulate before the aperture closes. Molding such covers with amorphous nylon rather than polycarbonate offers resistance to diluted quaternary ammonium disinfectant wipes, but hydrogen peroxide plasma sterilization is not recommended for unstabilized nylon; the part must be cleaned with wipes consistent with the OEM's electrostatic program. If the cover is a non-patient-contact enclosure, design verification is typically performed under IEC 61010-1 for electrical equipment safety and IEC 61326-1 for electromagnetic compatibility of laboratory equipment. Static decay should be validated from ±1000 V to <100 V per IEC 61340-2-1; published data for this specific grade is limited, so the test should be performed on molded covers after 48 h conditioning at 23°C/50% RH. The optical requirements are less stringent than sensor housings, but scratches from cleaning can create autofluorescence sites; use of nonabrasive polyester wipes is required. Thermal stability of static dissipation after repeated operator contact should be assessed over the expected cleaning interval, not only on first-article measurements.
In automated test equipment, pogo pin socket bodies and contact retention plates are replaced when insertion force repeatability degrades beyond the handler force envelope. The socket body functions as an insulating alignment plate, but static charge from device insertion can damage the device under test. A transparent static-dissipative amorphous nylon provides both pin-visible alignment and ESD protection; the surface resistivity of the socket body should remain in the 1×10^6–1×10^9 Ω/sq range per ANSI/ESD STM11.11. Gate vestige height is critical on the precision top surface; valve gate hardware in the mold is set to leave a vestige height below 0.05 mm, because a raised vestige lifts the socket frame and changes contact force. Injection molding with an amorphous nylon requires careful pack pressure control; overpacking raises the density of the matrix near the gate and can produce local stress birefringence that is visible as a halo under polarized light. The socket body is normally conditioned at 23°C/50% RH per ISO 291 before final pin bore measurement. Moisture absorption in polyamide can expand pin bores by a measurable amount; molded or drilled bores are dimensionally checked after conditioning rather than dry. In production handler audits, insertion force is measured with a calibrated force gauge over a sample of 30 cycles per lot; if force drift exceeds ±0.2 N from baseline, the first suspected failure is retained moisture or insert wear, not resin viscosity. Tempering the socket at 80°C for 2 h after molding can relieve molded-in stress, but this must be confirmed with the supplier because over-annealing can cause slight yellowing in transparent grades. Published data for the insertion life of this exact grade is limited; end-of-line correlation should be performed on the handler's force-displacement curve before release.
Competitive RTP Company RTP 299 E X 141359 F Amorphous Nylon (PA); ESD Protection - Permanently Static Dissipative - Transparent prices that fit your budget—flexible terms and customized quotes for every order.
For samples, pricing, or more information, please contact us at +8618136850665 or mail to admin@ascent-chem.com.
We will respond to you as soon as possible.
Tel: +8618136850665
Email: admin@ascent-chem.com
Flexible payment, competitive price, premium service - Inquire now!
RTP Company RTP 299 E X 141359 F is a pelletized, transparent, permanently static-dissipative amorphous polyamide (PA) compound formulated for injection molding and extrusion. The grade is intended for shaped components that must prevent electrostatic charge accumulation without opaque carbon-black fillers, topical antistatic coatings, or humidity-dependent migratory antistats. The “299” series identifies an amorphous nylon chemistry, while the trailing modifiers encode ESD protection, transparency, and a controlled development formulation. Because the dissipative character is incorporated into the bulk polymer system rather than applied as a surface treatment, the electrical function is permanent and is not removed by routine handling or mild abrasion. Published data for the specific internal code 141359 F is limited; therefore, acceptance testing should be based on the supplier’s certificate of analysis for the actual lot.
The material is classified as static-dissipative, not conductive. Surface resistivity for this product class falls between 1 × 106 and 1 × 109 Ω/sq when tested according to ANSI/ESD STM11.11 at 12% RH. This places the grade within the ESD Association dissipative range of 1 × 104 to <1 × 1011 Ω/sq. Static decay for permanently dissipative transparent amorphous nylons is commonly reported as <0.5 s from ±5 kV to 0 V under MIL-PRF-81705D, but the specific value for RTP 299 E X 141359 F must be verified on molded plaques because electrode geometry, wall thickness, and conditioning history alter the measurement.
The designation should be carried in full on purchasing and traceability documents. The numerical suffix 141359 F serves as a formulation identifier; substitutions or abbreviated descriptions can create audit failures in ESD-protected areas where material controls are required under ANSI/ESD S20.20 or IEC 61340-5-1. The compound is supplied in pellet form and is intended for processing on equipment dedicated to engineering thermoplastics, not for blending with carbon-black or mineral-filled regrind unless explicitly qualified.
Carbon-black-filled ESD compounds achieve charge conduction when the conductive filler loading exceeds the percolation threshold, typically between 2 wt% and 5 wt% for fine conductive blacks. Above this threshold, overlapping conductive particles form a continuous network, but the same network absorbs and scatters visible light so completely that the compound is opaque. In a transparent static-dissipative amorphous nylon, the dissipative phase must be continuous enough to provide charge relaxation, yet its domains must remain below the visible-light scattering threshold. This is a fundamentally constrained formulation problem: any conductive filler agglomerate large enough to scatter light will produce haze, while any discontinuity in the dissipative phase will produce an insulating region. The exact chemistry of the dissipative phase is proprietary, but the operative result is a bulk dissipative network that does not depend on a visible conductive filler.
Migratory antistatic additives operate differently. They bloom to the surface over time and form a moisture-dependent conductive layer. In dry environments below 15% RH, the adsorbed water layer is depleted and the antistatic function can decline or fail. In semiconductor assembly, fiber optic connector manufacturing, and ESD-safe instrument production, humidity is deliberately suppressed; a migratory antistat is therefore a fragile control strategy. A permanent dissipative grade maintains the electrical path independently of ambient moisture, provided the material has been properly dried before molding and conditioned to stable moisture content after molding.
| Approach | Surface resistivity band | Optical quality | Humidity dependence | Sloughing tendency |
|---|---|---|---|---|
| Carbon-black-filled ESD polyamide | 1 × 102 to 1 × 106 Ω/sq | Opaque | Low | Possible carbon particle release |
| Migratory antistat compound | 1 × 109 to 1 × 1012 Ω/sq | Transparent to translucent | High; function weakens below 15% RH | Surface bloom can transfer to parts |
| Transparent permanent dissipative amorphous nylon class | 1 × 106 to 1 × 109 Ω/sq | Transparent; haze controlled by dissipative domain size | Low once moisture conditioned | Low; no conductive filler particles |
Because the base polymer is amorphous rather than semi-crystalline, mold shrinkage is low and isotropic. Linear mold shrinkage is typically in the range of 0.005–0.007 mm/mm per ASTM D955, compared with 0.012–0.018 mm/mm for unreinforced semi-crystalline PA 66. This lower shrinkage reduces warpage in flat transparent windows and thin-wall enclosures. It does not eliminate moisture-induced dimensional change. Polyamide absorbs water from the environment; moisture content can rise from approximately 0.2 wt% at 50% RH to above 1.5 wt% at saturation. Stiffness and tensile properties shift after moisture conditioning, so dimensions and load-bearing capacity should be evaluated on conditioned specimens, not only on dry-as-molded plaques.
Moisture control is the first processing threshold. The pellets should be dried in a closed-loop desiccant dryer at 80°C for 4 h to a target moisture content below <0.15 wt%. The dryer dew point should be -40°C or lower. At ambient humidity above 60% RH, pellets left in an open machine hopper can regain moisture rapidly, and re-drying may be necessary. If wet pellets enter the barrel, hydrolysis cleaves the polyamide chains, lowering molecular weight and producing splay, bubbles, weakened weld lines, and visible haze. In transparent grades, these defects are not hidden by pigment and are normally immediate causes for rejection. Moisture content can be measured by Karl Fischer titration per ISO 15512 or by an equivalent thermogravimetric method; visual splay is not a satisfactory process control because it appears only after hydrolytic degradation has begun.
Melt temperature for amorphous nylon is generally set between 249°C and 293°C, with the lower half preferred when hot-runner residence time exceeds 3–5 min. The permanent dissipative modification may increase melt viscosity relative to unmodified amorphous nylon; melt-temperature adjustments should be guided by screw torque, injection peak pressure, and cushion consistency rather than by a fixed barrel chart. A general-purpose nylon screw with a compression ratio of 2.5:1–3.0:1 and an L/D ratio of 20:1–24:1 is commonly used. Back pressure is maintained between 0.3 MPa and 0.7 MPa (50–100 psi) to homogenize the dissipative phase without excessive shear heating. Excessive back pressure or high screw speed can produce localized melt temperatures above 300°C, causing yellowing and possible degradation of the dissipative phase.
Gate design is a particular constraint for transparent grades. High shear at undersized pin gates can cause melt fracture, visible as radial haze or silver streaks from the gate. Practical gate shear-rate limits for unfilled amorphous nylons are frequently below 30,000 s-1 at the melt temperature, but the dissipative formulation may require reducing this limit by 20–30% because the additive phase may be shear sensitive. Hot-runner manifolds must be balanced across cavities; an imbalanced manifold can over-shear one side of the tool, producing visible color shift and nonuniform surface resistivity. Weld lines require separate electrical validation because the dissipative phase may be less effective where flow fronts meet. A single-point surface-resistivity measurement at the gate region is not sufficient for qualification of parts with multiple gates, holes, or abrupt wall-thickness changes.
| Parameter | Recommended setting | Equipment or test basis |
|---|---|---|
| Drying temperature | 80°C | Closed-loop desiccant dryer |
| Drying time | 4 h | Dew point -40°C or lower |
| Target moisture content | <0.15 wt% | ISO 15512 Karl Fischer |
| Melt temperature | 249–293°C | Lower half preferred for long residence |
| Mold temperature | 65–93°C | Moderate surface finish and stress relief |
| Back pressure | 0.3–0.7 MPa (50–100 psi) | Hydraulic or electric injection unit |
| Screw compression ratio | 2.5:1–3.0:1 | General-purpose nylon screw |
| Screw L/D ratio | 20:1–24:1 | Single-stage screw |
| Maximum residence time | 5 min | Barrel or hot-runner dead spot |
| Regrind upper limit | 20 wt% | Lower for visible optical parts |
Regrind use is permissible only after drying to the same moisture target as virgin pellets and after surface-resistivity verification. Multiple heat histories increase yellowing and can shift the dissipative phase continuity. Transparent parts may require lower regrind levels than opaque ESD parts because the visual threshold for defects is tighter. Any cross-contamination with carbon-black purgings or colored resins will produce black specks or visible streaks, so thorough purging and dedicated material-handling equipment are recommended.
Batch-to-batch consistency can be monitored on the production line by recording screw recovery time, injection peak pressure, and cushion position at constant settings. A shift greater than 10% from the qualified baseline may indicate moisture excursion, barrel heater drift, or feeder segregation. Feeder segregation is a practical risk because the dissipative modifier may differ in bulk density from the base resin pellets. Gravimetric dosing or hopper-mounted mixers are preferred on long runs to maintain the intended additive concentration and avoid local insulating zones caused by uneven pellet distribution.
Mechanical and optical property checks should be performed on conditioned plaques. For dry-as-molded specimens, tensile strength at yield is generally 70–90 MPa and flexural modulus 2.5–3.0 GPa, but these values decrease after moisture uptake. Total luminous transmittance above 85% at 2 mm thickness is typical for transparent amorphous nylons, though the dissipative additive may reduce light transmittance by several percentage points and increase haze. Published data for this specific formulation is limited; optical acceptance limits should be established on production-representative plaques, not borrowed from unmodified amorphous nylon.
When a design team replaces an opaque carbon-black-filled ESD nylon housing with a transparent dissipative amorphous nylon, the electrical test plane must shift from bulk conductivity to surface and volume resistance values that are meaningful for the circuit application. Carbon-black compounds often measure in the conductive range below 1 × 105 Ω/sq; the transparent grade operates only in the static-dissipative range. If the application requires a rapid ground path for metal-to-plastic contact, a dissipative material may not provide sufficiently low resistance. The designer should verify both surface-to-ground resistance and charge generation under contact and separation events using ANSI/ESD STM11.12 or IEC 61340-2-3, rather than assuming that any ESD grade is a direct drop-in for a fast-discharge conductive compound.
The replacement of a coated transparent part also changes the failure mode. A conductive coating can be scratched, delaminate, or wear from edges, creating insulating regions that are not visually obvious. A permanently dissipative bulk material retains its dissipation through the wall thickness, so minor surface abrasion does not remove a separate functional layer. However, the bulk material may still require cleaning with non-abrasive, solvent-compatible agents. Strong acids, oxidizing agents, hot water immersion, or steam exposure can degrade the polyamide matrix over time. Chemical compatibility should be confirmed under actual end-use conditions using ASTM D543 or ISO 22088 protocols, and aggressive solvents such as methyl ethyl ketone should be avoided unless specifically validated.
Compliance claims must be confirmed against the lot-specific composition. Typical ESD thermoplastics are evaluated for RoHS 2011/65/EU restricted substances and REACH Regulation (EC) No 1907/2006 SVHC content; supplier declarations are required rather than generic assumptions. For cleanroom applications, low particle release and low outgassing are desirable; these properties are not guaranteed by the base designation and must be qualified for the specific part geometry, cleaning process, and post-molding operations. Outgassing can be screened by ASTM E595 where a defined contamination budget exists.
Reported industrial uses for this category of material include viewing windows for wafer-handling equipment, transparent ESD enclosures, covers for electronic assembly cells, diagnostic instrument housings, trays for optical transceivers, and protective windows used in dry semiconductor environments. In each application, the part should be qualified for surface resistivity, optical haze, dimensional stability after moisture uptake, weld-line performance, and chemical resistance to the cleaning agents used on the production floor. The material is not intended for direct food-contact or implantable medical use unless regulatory test data are provided for the finished article under the applicable national or regional standard.
