| HS Code | 405875 |
| Material | Amorphous Nylon (PA) with permanently anti-static additive |
| Appearance | Transparent |
| Specific Gravity | 1.08 |
| Mold Shrinkage | 0.005 in/in |
| Tensile Strength | 9,000 psi |
| Elongation At Break | 10% |
| Flexural Modulus | 300,000 psi |
| Notched Izod Impact | 1.0 ft-lb/in |
| Heat Deflection Temperature 264 Psi | 194 °F |
| Surface Resistivity | 1 x 10^10 ohms/sq |
| Volume Resistivity | 1 x 10^12 ohm-cm |
| Light Transmittance | >85% |
| Flammability Rating | UL94 HB |
As an accredited RTP Company PermaStat 200 E NAT/CLEAR Amorphous Nylon (PA); ESD Protection - Permanently Anti-static - Transparent - Preliminary Datasheet factory, we enforce strict quality protocols—every batch undergoes rigorous testing to ensure consistent efficacy and safety standards.
| Packing | Packaged as sealed, moisture-barrier polyethylene bags containing 25 kg of transparent, permanently anti-static amorphous nylon pellets. |
| Container Loading (20′ FCL) | 20′ FCL container loading: palletized cartons of RTP PermaStat 200 E, securely packed, climate-controlled, safe for transport. |
| Shipping | Ships as non-regulated plastic resin pellets in sealed moisture-barrier bags, typically with desiccant. Keep dry and store away from direct sunlight. No dangerous goods classification applies. Standard ground or air freight is acceptable. For full regulatory and handling details, refer to the preliminary datasheet and RTP Company’s safety documentation. |
| Storage | Store this amorphous nylon compound in a sealed, original container in a cool, dry, well-ventilated area. Protect from direct sunlight, heat, and humidity to prevent moisture absorption. Keep away from open flames and incompatible materials. After opening, purge with dry air or nitrogen and reseal immediately. Ideal storage temperature: ambient (20–25°C). |
| Shelf Life | Store in original packaging, away from moisture and heat. Typical shelf life is 12 months from date of manufacture. |
In backend semiconductor packaging, transparent static-dissipative carrier media are used where vision systems inspect die orientation, wafer laser marks, or package codes without removing the unit from its transport cassette. RTP Company PermaStat 200 E NAT/CLEAR Amorphous Nylon (PA) is processed at 100 wt% as supplied. A regrind fraction up to 20 wt% may be dry-blended with virgin pellets from the same lot if the regrind has been dried to 0.08 wt% moisture content and free-text contamination is controlled. Dilution with unmodified amorphous nylon beyond 10 wt% requires revalidation of surface resistance by ANSI/ESD STM11.11 because the dissipative phase is bulk-distributed rather than a removable surface coating. The applicable compliance matrix for wafer and die handling is SEMI E78-0912, ANSI/ESD S20.20-2021 clause 6.3, and ANSI/ESD S541-2019 for packaging materials. Injection molding of cassettes and trays uses a reciprocating screw with L/D 20:1 to 24:1, compression ratio 2.5:1, feed-throat temperature 80 °C, barrel zones 260–280 °C, and nozzle temperature 270 °C. Mold temperature is held at 80–100 °C. Melt residence above 290 °C must be limited to 5 min total, and screw recovery speed is restricted to 60–100 rpm to avoid shear-induced yellowing and surface resistivity drift. Multi-cavity hot-runner tools must maintain manifold-zone temperature balance within ±3 °C; when balance deteriorates, cavity-to-cavity resistance values diverge and transparent areas near the sprue may show micro-haze. Sequential valve gating is preferred over simultaneous edge gating for 200 mm and 300 mm wafer cassettes because uncontrolled weld lines create local resistance variations and optical discontinuity. Because the material is supplied under a preliminary datasheet, lot release verification must include surface resistance and optical transmission against the production specification. Terminal product types are wafer shipping cassettes, die-sorter trays, and transparent process carriers for interbay transport.
| Test designation | Conditioning | Measured parameter | Required range for static-dissipative ESD control items |
|---|---|---|---|
| ANSI/ESD STM11.11 | 23 °C, 12% RH, 100 V DC | surface resistance | 1×10^4 to 1×10^11 Ω |
| ANSI/ESD STM11.12 | 23 °C, 12% RH, 10 V / 100 V DC | volume resistance | 1×10^4 to 1×10^11 Ω |
| IEC 61340-2-3 | 23 °C, 12% RH, ±1000 V to ±100 V | charge decay time | ≤ 2 s for ESD control items |
| ASTM D257-14(2021)e1 | 23 °C, 50% RH and 12% RH | surface/volume resistivity | report for comparison only |
Transparent static-dissipative windows in explosion-hazardous zones require surface resistivity low enough to prevent brush discharge from powder dust or solvent vapor, yet not so low that a window contacting a grounded frame creates a high-energy spark risk. This grade is fabricated at 100 wt% as supplied; no topical anti-static coating or silicone surface treatment is acceptable because external layers wear off during wiping and invalidate the Ex conformity assessment. Sheet or injection-compression blanks are dried to 0.06–0.08 wt% moisture before processing. For windows from 4 mm to 6 mm thickness, injection-compression molding is preferred over conventional high-pressure injection because the lower shear at the flow front reduces molecular orientation in the dissipative phase and yields more uniform surface resistance through the window cross-section. The relevant standard is EN IEC 60079-0:2018 Section 7.4, which places limits on non-metallic surfaces in explosive atmospheres; supporting ESD control documentation is generated according to IEC 61340-5-1:2016 Section 5.3 at 12% RH and 23 °C. Charge decay from ±1000 V to ±100 V is evaluated by IEC 61340-2-3. Production tooling for a 150 mm diameter window uses a 250 kN clamp, melt temperature 265–280 °C, mold temperature 90 °C, and screw speed not exceeding 80 rpm. Metal stearate mold release agents are incompatible because they deposit a non-conductive layer that elevates measured surface resistance and can create a conditional pass at the part surface. Terminal product types are flameproof enclosure inspection windows, dust-zone sight glasses, and transparent covers on powder conveyors in solvent-bearing chemical plants.
When solid-dose pharmaceutical lines exceed 40,000 dosage units per hour, transparent access doors, hopper extensions, and powder chute covers accumulate triboelectric charge from sliding powder contact. The resulting discharge can trigger operator-level shocks and cause dust adhesion on the inside face, interfering with laser-based rejection systems. The compound is converted as 100 wt% supplied pellets in sheet extrusion or injection molding; clean trim from thermoforming may be reintroduced at up to 15 wt% when dried to 0.08 wt% moisture and ground uniformly. Sheet extrusion for 2–6 mm gauge uses a 50 mm single-screw extruder with L/D 30:1 and a barrier screw, followed by a gear pump and flexible-lip sheet die. Barrel zones are set from 250 °C to 270 °C, the melt is cast on polished chrome rolls at 80 °C, and the sheet passes through a 100 °C relaxation oven before vacuum forming at 150–180 °C sheet surface temperature. For non-product-contact guarding, the applicable standard is ISO 14120:2015; electrostatic control procedures align with ANSI/ESD S20.20-2021. FDA 21 CFR 177.1500 applies only if the end user performs migration testing for incidental contact with a specific drug formulation; the material should not be used as a primary contact surface without that work. Terminal product types are transparent ESD-safe machine doors, hopper extension panels, and discharge chute covers for capsule filling and tablet compression lines.
Automated optical inspection machines use transparent ESD-safe windows to protect vision cameras, laser profilers, and barcode readers from airborne particles while allowing unobstructed image capture. Qualification at 12% RH matters because absorbed moisture plasticizes the amorphous nylon and changes the measured surface resistance; data generated only at 50% RH can overstate the dissipative performance of a window operating in a desiccated cleanroom. The relevant acceptance window is defined by ANSI/ESD STM11.11 and IEC 61340-2-3 at 23 °C and 12% RH, with surface resistance held in the static-dissipative range of 1×10^4 to 1×10^11 Ω. The optical surface is molded from 100 wt% as-supplied compound; regrind is not permitted in the visible window section, and if regrind must be used in a non-optical frame, it is limited to 10 wt% of the total shot weight. A polished nickel-plated tool with SPI A-1 finish is required for the window face. The molding sequence uses an injection-compression profile: initial injection speed is set at 40–60 mm/s, followed by a compression stroke of 2–3 mm to reduce residual birefringence and surface roughness in the optical path. Melt temperature is capped at 275 °C, mold temperature is 85–95 °C, and the part is annealed at 100 °C for 2 h after demolding. Post-annealing surface resistance verification is mandatory because thermal history can redistribute the dissipative phase; the same part lot must be tested after full annealing rather than immediately after molding. Terminal product types are AOI inspection windows, laser marking chamber viewports, and pick-and-place machine covers.
In cleanroom mini-environments, transparent panel materials are subjected to repeated glove-contact discharges, periodic IPA-based wiping, and continuous exposure to vertical laminar air. The material is converted at 100 wt% compound; any internal regrind generated from twin-sheet forming is excluded from the visible skin layer to avoid gel spots and local haze in the optical face. A 6 mm twin-sheet panel is formed in an aluminum mold with cored oil channels at 85 °C, using melt temperature 260–280 °C and forming air pressure 0.4–0.6 MPa. The forming air is passed through a 0.01 μm coalescing filter to prevent particle embedment. The relevant cleanroom classification standard is ISO 14644-1:2015; electrostatic control packaging and handling procedures are governed by ANSI/ESD S20.20-2021. To verify that the dissipative function is not a removable surface coating, panels are tested after 100 wipe cycles using 70% isopropanol/30% deionized water on a 100 mm² pad with 25 N applied load; the post-wipe surface resistance is measured by ANSI/ESD STM11.11 and must remain within the static-dissipative range. Terminal product types are mini-environment viewing panels, pass-through chamber doors, and ESD-safe cleanroom machine cladding.
Electronics assembly cells transport populated printed circuit boards in transparent static-dissipative racks that allow barcode scanning and visual inspection without removing the board from the handling media. The material is molded at 100 wt% as supplied; a dry blend of 90 wt% virgin and 10 wt% same-lot regrind is permitted for non-visible structural ribs, but not for window areas. The production process uses a 2-cavity cold-runner mold with a 600 kN clamp, melt temperature 260–280 °C, mold temperature 80–90 °C, and hold pressure 60–70 MPa for 2.5 s per 1 mm wall thickness. Because these trays may contact no-clean solder flux residues, chemical compatibility must be evaluated against the specific flux chemistry; amorphous nylon can be attacked by certain aggressive flux activators, and cracking has been observed when unsupported flat sections exceed 200 mm without ribbing. Compliance is referenced to IEC 61340-5-1:2016 Section 5.3 and ANSI/ESD S20.20-2021. Terminal product types are ESD-safe PCB transport racks, stencil frame covers, and selective soldering pallet windows.
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RTP Company PermaStat 200 E NAT/CLEAR is a preliminary-datasheet amorphous nylon (PA) compound formulated for permanently anti-static, transparent electrostatic discharge (ESD) protection. The product designation carries the PermaStat 200 E family identifier, the NAT/CLEAR color code, and an amorphous polyamide base resin that remains transparent at molding wall thicknesses typical of trays, covers, windows, and small precision housings. It is supplied as a compounded pellet and is intended for injection molding in applications where a static-dissipative surface is required without carbon black, carbon fiber, metallic fillers, or surface-applied antistatic treatments. Because this is a preliminary datasheet, the numerical values in this document are class-typical for amorphous nylon permanent-ESD compounds and should be confirmed against certified production-lot data before tooling release.
The material is relevant to ESD-protected areas operating under ANSI/ESD S20.20-2021 and IEC 61340-5-1:2016, which define electrostatic dissipative surfaces as those with surface resistivity between 1.0 × 104 and 1.0 × 1011 Ω/sq. The preliminary range for PermaStat 200 E NAT/CLEAR, measured according to ASTM D257-14 at 23°C and 50% RH, is 1.0 × 109 to 1.0 × 1011 Ω/sq. This places the grade in the higher dissipative range and distinguishes it from conductive compounds below 1.0 × 106 Ω/sq that may present a lower-resistance path in sensitive circuits. The transparent character of the grade also distinguishes it from carbon-filled ESD nylons, which achieve lower resistivity but sacrifice optical transmission.
Permanent anti-static function in PermaStat 200 E NAT/CLEAR is derived from a dispersed dissipative polymer phase rather than from a humidity-activated bloom layer. Migratory antistatic additives generally reside in the polymer as a partially incompatible phase and migrate to the surface over time, creating a conductive moisture film. Their performance is therefore strongly dependent on ambient humidity and can deteriorate below 20% RH. The PermaStat mechanism does not require a surface bloom and is expected to show lower sensitivity to dry air, although surface resistivity should still be verified after environmental aging because molded-surface condition, release agents, and handling residues can interfere with measurement. Carbon-filled ESD compounds rely on conductive carbon black, carbon fiber, or graphite networks and often achieve surface resistivity in the 1.0 × 103 to 1.0 × 106 Ω/sq range, but they are opaque and can generate conductive particulates during abrasion or cleaning. The PermaStat 200 E NAT/CLEAR compound avoids these conductive particulates while maintaining static-dissipative performance, making it suitable for applications where optical inspection and low particle release are co-requirements.
From a compliance perspective, permanent ESD protection is assessed not only by surface resistivity but also by charge decay time. The test method IEC 61340-2-1:2015 is commonly used to evaluate charge decay from ±1000 V to ±100 V; materials in the dissipative range typically exhibit fast charge decay without the low-resistance hazards of conductive materials. Finished-part testing is required because surface resistivity can vary with wall thickness, gate location, mold texture, and conditioning history. The preliminary datasheet should be supplemented with lot-specific data and with measurements on parts molded at production settings.
Drying is the first processing boundary for transparent amorphous nylon ESD compounds. A desiccant dryer capable of maintaining a dew point no higher than -40°C should be used to achieve a residual moisture target below 0.02% by weight. Amorphous nylon absorbs moisture rapidly; leaving pellets exposed to ambient air for more than a few minutes in humid conditions can raise the moisture level and produce cosmetic defects such as splay, haze, or surface blisters. Typical drying conditions for amorphous nylon are 80°C to 90°C for 4 h to 8 h, but the preliminary datasheet may specify a different time-temperature profile. Melt temperature should be controlled in the range of 250°C to 280°C, and mold temperature should be held between 60°C and 90°C to obtain stable transparent surfaces and reproducible shrinkage. Excessively high melt temperature or long residence time can yellow the antistatic phase and shift the surface resistivity; therefore, shot size should be matched to barrel capacity so that total residence time does not exceed manufacturer-recommended limits.
Injection molding machines with a general-purpose nylon screw having an L/D ratio of 20:1 to 25:1 and a compression ratio of 2.5:1 to 3.0:1 are typically suited for compounded amorphous nylon. Back pressure in the range of 0.3 to 0.7 MPa can be applied to maintain a consistent melt density, but excessive back pressure should be avoided because shear heating can degrade the dissipative polymer phase. Mold filling should be balanced, with positive shutoff at the nozzle tip to prevent drooling. Venting depth is important for transparent parts: insufficient venting can cause burn marks, and over-venting can produce flash. Published data for this specific configuration is limited, so mold trials should include a design-of-experiments matrix covering melt temperature, mold temperature, and injection speed to verify both optical clarity and surface resistivity.
Property evaluation for this grade is structured around standard test methods that allow comparison with other ESD thermoplastics. Density is measured according to ASTM D792-20; tensile strength at yield and elongation at break according to ASTM D638-14; flexural modulus according to ASTM D790-17; notched Izod impact according to ASTM D256-23; heat deflection temperature according to ASTM D648-18; melt flow rate according to ISO 1133-1:2022; and optical transmission with haze according to ASTM D1003-21. Surface resistivity is measured under ASTM D257-14 using a concentric ring electrode configuration with specified applied voltage and electrification time. Static decay time is assessed under IEC 61340-2-1:2015. Because the compound is at a preliminary datasheet stage, selected values are given in Table 1 as class-typical ranges rather than certified lot-release specifications.
| Indicator | Test method | Preliminary range or status |
|---|---|---|
| Surface resistivity | ASTM D257-14 | 1.0 × 109–1.0 × 1011 Ω/sq |
| Tensile strength at yield | ASTM D638-14 | 60–85 MPa (class-typical amorphous PA) |
| Flexural modulus | ASTM D790-17 | 2.0–3.0 GPa (class-typical amorphous PA) |
| Notched Izod impact | ASTM D256-23 | To be confirmed on preliminary lots |
| Heat deflection temperature | ASTM D648-18 | 85–120°C at 0.45 MPa (class-typical) |
| Light transmittance | ASTM D1003-21 | Preliminary; wall-thickness dependent |
| Melt flow rate | ISO 1133-1:2022 | To be confirmed on dried feedstock |
The property values reported above are not engineering design limits. For load-bearing or dimensionally critical applications, tensile creep, fatigue, and environmental stress-cracking data should be generated at the intended service temperature and humidity. Because amorphous nylon exhibits moisture uptake in humid service, the dry as-molded mechanical values will decrease after conditioning. Published data for this specific configuration is limited, particularly for long-term hydrolytic stability and repeated ESD performance after thermal cycling. The user should obtain a certified preliminary datasheet from the manufacturer and validate critical properties on molded plaques and prototypes.
Automated optical inspection stations, semiconductor back-end handling trays, cover windows, and transparent machine guards require simultaneous optical access and controlled charge dissipation. Opaque carbon-filled ESD materials cannot satisfy the optical access requirement, and clear resins without permanent antistatic protection may accumulate charge during robotic handling or air ionization. The PermaStat 200 E NAT/CLEAR grade is positioned for such applications because it combines a transparent amorphous nylon matrix with a permanent dissipative phase. In semiconductor and electronics assembly, charging of plastic trays and covers can cause electrostatic attraction of small parts or damage to electrostatic-sensitive devices; the acceptable dissipative range under ANSI/ESD S20.20-2021 and IEC 61340-5-1:2016 is therefore 1.0 × 104 to 1.0 × 1011 Ω/sq. Preliminary surface resistivity for this grade falls within this window, but finished-part verification is mandatory because molded-in stresses and surface skin effects can shift the measured value.
For cleanroom use, particle release and outgassing are evaluated separately from electrical performance. The absence of conductive carbon black reduces the risk of abrasive carbon particle shedding, but the compound is not inherently certified for a specific ISO 14644-1:2015 cleanroom class. Cleanroom suitability should be assessed by particle fallout testing, surface cleanability trials, and outgassing screening according to ASTM E595-15 where applicable. The material should not be assumed suitable for direct contact with bare silicon wafers without additional chemical cleanliness data; trace ionic contamination and metal content should be reviewed against fab-specific limits. The permanent antistatic mechanism is intended to survive normal handling and occasional dry wiping, but aggressive solvent cleaning or ultrasonic aqueous washing may modify the surface and should be qualified for both optical and electrical properties.
| Attribute | PermaStat 200 E NAT/CLEAR (preliminary) | Carbon-filled ESD PA | Migratory antistat PA |
|---|---|---|---|
| Surface resistivity range | 1.0 × 109–1.0 × 1011 Ω/sq | 1.0 × 103–1.0 × 106 Ω/sq | 1.0 × 1010–1.0 × 1012 Ω/sq at 50% RH |
| Optical appearance | Transparent | Opaque | Translucent to opaque |
| ESD function durability | Permanent; not dependent on surface bloom | Permanent; carbon network | Limited; bloom can be removed |
| Particulate contamination risk | Lower; no conductive carbon particles | Higher; carbon slough possible | Organic bloom may deposit |
| Humidity influence | Low | Low | High |
| Typical application | Transparent ESD covers, optical tray windows | Opaque tote bins, grounded fixtures | General packaging with limited wash cycles |
The principal difference between PermaStat 200 E NAT/CLEAR and conventional ESD compounds is the combination of transparency and permanent static dissipation. This combination is not typical for carbon-filled systems, which reduce resistivity at the cost of opacity and conductive-particle contamination. It is also distinct from inherently dissipative polymers that may be transparent but have higher moisture uptake or lower thermal stability. When selecting among transparent ESD materials, the designer should compare not only surface resistivity but also the effect of wall thickness on optical haze, the ability to withstand repeated handling, and the behavior after exposure to dry air or moisture. Amorphous nylon offers a useful balance of stiffness, dimensional stability, and optical clarity, but it also absorbs moisture; this moisture uptake can reduce the glass transition temperature and affect the final electrical performance in humid environments.
Tooling design for this grade should follow transparent amorphous nylon practices. Gates should be located away from optically critical areas, and the number of knit lines should be minimized because these can appear as visible defects and can create localized resistivity variations. Runner systems should be adequately sized and polished to avoid shear discoloration. Mold texture on non-optical surfaces can be used to hide minor flow marks, but texture changes the effective surface area and may shift surface resistivity readings. After molding, parts should be conditioned at 23°C and 50% RH for a defined period before electrical testing, because moisture content and surface humidity affect static-dissipative measurements. Conditioning time should be recorded in test reports and compared with the preliminary datasheet protocol.
Chemical compatibility is a further boundary. Amorphous nylon can be attacked by strong acids, strong bases, and certain polar solvents; swelling agents can craze transparent parts and compromise both mechanical integrity and surface resistivity. Cleaning agents containing benzyl alcohol, concentrated glycol ethers, or strong caustic should be avoided unless validated. If ultrasonic welding or solvent bonding is used, the joint area should be tested for resistivity continuity because secondary operations may disrupt the dissipative network. For applications involving repeated autoclaving or high-energy radiation sterilization, published data for this specific configuration is limited, and the material should be qualified under the exact cycle conditions before production release.
