| HS Code | 710827 |
| Density | 1.05 g/cm³ |
| Melting Point | 178 °C |
| Melt Volume Rate 275c 5kg | 12 cm³/10 min |
| Tensile Modulus | 1.40 GPa |
| Tensile Strength Yield | 42 MPa |
| Elongation At Yield | 4 % |
| Elongation At Break | 25 % |
| Charpy Impact Strength 23c | No break |
| Charpy Notched Impact Strength 23c | 4 kJ/m² |
| Heat Deflection Temperature 0 45 Mpa | 130 °C |
| Heat Deflection Temperature 1 8 Mpa | 50 °C |
| Flammability Rating Ul94 | V-0 at 0.8 mm |
| Water Absorption Saturation | 1.5 % |
| Volume Resistivity | 1.0E+13 ohm·cm |
As an accredited EMS-Grivory Grilamid® L 20 H FR PA12 FR factory, we enforce strict quality protocols—every batch undergoes rigorous testing to ensure consistent efficacy and safety standards.
| Packing | EMS-Grivory Grilamid® L 20 H FR PA12 FR: 25 kg sealed moisture-proof bags containing flame-retardant PA12 pellets. |
| Container Loading (20′ FCL) | 20′ FCL: palletized sealed bags of Grilamid L 20 H FR loaded tightly, secured with dunnage, protected from moisture and heat. |
| Shipping | Grilamid® L 20 H FR ships as flame-retardant PA12 granules in sealed moisture-proof bags. Transport at ambient temperature, keep dry, and avoid excessive humidity or compression. Not regulated as hazardous for standard road, sea, or rail freight when packaged per manufacturer guidelines. |
| Storage | Store Grilamid® L 20 H FR in its original, unopened packaging in a cool, dry, well-ventilated area. Keep away from direct sunlight, heat sources, and open flames. Protect from moisture and humidity to prevent degradation. Avoid contact with incompatible materials. Follow manufacturer guidelines; typical shelf life is several years under proper storage conditions. |
| Shelf Life | Shelf life is typically 2 years from shipment when stored unopened, dry, and cool in original packaging. |
For low-voltage switchgear terminal blocks and busbar supports, the selection of EMS-Grivory Grilamid® L 20 H FR PA12 FR is controlled by creepage distance requirements under IEC 60664-1 and flammability classification under UL 94. The material is halogen-free; its UL 94 V-0 classification is maintained at a wall thickness of 0.8 mm in natural and coloured formulations. Comparative tracking index values measured under IEC 60112 are reported at 600 V on 3 mm test plaques at 25 °C and 50 % relative humidity, which supports reduced creepage distances in pollution degree 2 environments. The lower equilibrium moisture uptake of the PA12 backbone, measured by ISO 62, keeps dimensional change below 0.5 % after 48 h water immersion for typical switchgear housing geometries. This characteristic reduces contact misalignment in multi-pole terminal blocks after exposure to high-humidity storehouses before installation.
The processing window in multi-cavity injection moulds is constrained by the flame-retardant package. Pre-drying in a desiccant dryer at 80 °C for 4 h to 8 h is mandatory; the residual moisture must be below 0.10 % by Karl Fischer titration before melt processing. Melt temperature is held between 245 °C and 265 °C, while mould temperature is set to 50 °C to 70 °C for dimensional repeatability. At melt temperatures above 270 °C or residence times exceeding 10 min, the flame-retardant additive system begins to degrade, producing surface streaking and intermittent UL 94 V-0 failure at 0.8 mm. Production-scale experience on hydromechanical injection units with 22:1 L/D general-purpose screws shows that a melt cushion between 2 mm and 4 mm and screw back pressure of 30 bar to 60 bar are necessary to keep flame-retardant dispersion homogeneous. Regrind from runners is limited to 20 wt%; higher fractions lower melt viscosity and create short-shot risk in thin ribs below 0.5 mm. Finished parts include feed-through terminal housings, MCB rear panels, and busbar support insulators.
| Processing parameter | Set range | Failure mode outside range |
|---|---|---|
| Residual moisture after drying | ≤0.10 % | Surface splay, hydrolysis, loss of UL 94 V-0 |
| Melt temperature | 245–265 °C | Above 270 °C: discolouration and flame-retardant degradation |
| Mould temperature | 50–70 °C | Below 40 °C: poor knit-line strength, incomplete crystallisation |
| Residence time | ≤10 min | Yellowing, batch flammability failure |
| Regrind fraction | ≤20 wt% | Short shots, flow lines, ignitability shift |
Rail vehicle cable management systems use PA12 for its resistance to alkaline wash liquors, diesel fuel, and ozone, but the flame-retardant requirement is set by EN 45545-2. In interior zones, cable cleats, slotted trunking, conduit clips, and spiral wrap require the final moulded or extruded part to meet hazard level HL2 or HL3 according to the vehicle category and escape path. Because the flame-retardant package is halogen-free, smoke corrosion testing under ISO 5659-2 becomes less severe than for brominated FR systems; however, published data for Grilamid® L 20 H FR in this specific rail configuration is limited. End-use qualification must be performed on the final part geometry at wall thicknesses between 0.8 mm and 3.0 mm, because flame spread and heat release are strongly affected by part surface area and mounting orientation.
Extrusion of slotted trunking is run on single-screw extruders with 25:1 to 30:1 L/D, barrier screws, and melt temperatures not exceeding 250 °C. The die land ratio is maintained between 8:1 and 12:1 to avoid pressure spikes that shear heat the flame-retardant compound. Injection-moulded cable cleats and clips use a melt temperature of 230 °C to 250 °C and a mould temperature of 40 °C to 60 °C. The regrind ratio is kept at or below 15 wt% for rail parts because batch traceability under EN 45545-2 requires stable flammability response after recycling. Each shipment of rail components is accompanied by a declaration under REACH and RoHS 2011/65/EU; if colour masterbatch is added, the total addition is limited to 2 wt% to avoid dilution of the flame-retardant package below the certified concentration. Finished components include tunnel cable brackets, passenger saloon conduit clips, and cable tie bases used in relay cabinets.
AC charging plug housings, contact carrier plates, and in-cable control box bases are moulded from Grilamid® L 20 H FR where outdoor humidity, electrical tracking, and flame retardancy must be managed without brominated additives. The material’s comparative tracking index under IEC 60112 is specified at 600 V; this is applied in design reviews under IEC 62196-1 to reduce creepage distances between pilot and power contacts in Type 2 plugs. Flammability classification is UL 94 V-0 at 0.8 mm, and glow-wire ignition temperature per IEC 60695-2-11 is typically in the range of 775 °C to 850 °C at 1.5 mm, depending on colour and moulding conditions. For outdoor charging installations, the low moisture uptake of PA12 under ISO 62 stabilises the dielectric properties of contact carrier plates during seasonal humidity cycles, reducing contact resistance drift compared with PA6 and PA66 grades.
Moulding trials for charging gun housings on a 180-tonne injection machine with hot runner needle valve nozzles show that the processing window is located between 250 °C and 265 °C melt temperature and 50 °C to 80 °C mould temperature. The holding pressure profile is set to 60 MPa to 80 MPa for the first 4 s, followed by a lower compensation phase to prevent sink marks at bosses and snap-fit undercuts. Residual moisture after drying must be below 0.08 %; drying at 80 °C for 6 h in a desiccant dryer with a dew point below -40 °C is typical. Regrind content is capped at 15 wt% because higher recycled fractions alter the colour of RAL 9011 parts and create visible flow lines in thick-to-thin transitions. The contact carrier is often overmoulded with brass or copper alloy inserts; insert preheating to 120 °C reduces interfacial stress cracking after thermal shock testing from -40 °C to 85 °C per IEC 62196-1. Terminal products include IEC 62196-2 Type 2 plug housings, charge controller enclosures, and charging inlet mounting flanges.
| Compliance test | Standard designation | Acceptance condition |
|---|---|---|
| Flammability class | UL 94 | V-0 at 0.8 mm |
| Comparative tracking index | IEC 60112 | 600 V at 3 mm |
| Glow-wire flammability | IEC 60695-2-11 | 850 °C at 1.5 mm, part-dependent |
| Dielectric strength | IEC 60243-1 | Supplier datasheet value must be verified on 3 mm plaques |
| Outdoor exposure conditioning | ISO 62 | Low moisture uptake relative to PA66; end-use validation required |
Inside fiber optic distribution frames, splice cassettes and breakout modules are moulded from Grilamid® L 20 H FR PA12 FR to control smoke density and flame spread in central office equipment. The governing compliance framework is Telcordia GR-63-CORE for network equipment building systems, combined with UL 94 V-0 classification at 1.5 mm for individual plastic parts. Polyamide 12 is chosen over PC/ABS because moisture-induced warpage after repeated 40 °C / 95 % RH cycles can displace optical fiber routing channels and create insertion loss shifts in connectorised cassettes. The low water uptake of the PA12 backbone, measured by ISO 62 at saturation below 1.5 % by weight, limits the linear dimensional change in thin-walled splice tray ribs to approximately 0.2 % when conditioned from 20 % RH to 80 % RH; this figure must be confirmed on the finished part, as published data for this specific configuration is limited.
The moulding process for splice cassettes with wall sections between 0.6 mm and 1.2 mm uses a melt temperature of 240 °C to 255 °C and a mould temperature of 40 °C to 60 °C. To prevent fibre guide ribs from filling short at the end of the flow path, injection speed is programmed in two stages: a rapid initial filling phase at 120 mm/s to 180 mm/s, followed by a reduced velocity phase before final fill. Holding pressure is transferred at 95 % cavity fill. Regrind from sprue and runner is limited to 15 wt% and is only used in internal non-cosmetic areas after drying at 80 °C. Screw recovery uses a back pressure of 40 bar to 60 bar to maintain dispersion of the flame-retardant package without generating excessive shear heat. Finished terminal components include 19-inch rack splice tray housings, wall-box breakout modules, and fanout block bodies used in FTTH distribution points.
For injection moulded connector bodies, glow plug sockets, and sensor brackets located in the engine compartment, Grilamid® L 20 H FR is specified where fuel, hot oil, and urea solutions contact the part. The PA12 backbone provides resistance to hot diesel and engine oil; after immersion in standard reference fluids, tensile strength retention is assessed under ISO 527-1/-2. In the absence of accessible supplier data for this grade under every fluid, qualification is performed on finished parts at 1,000 h exposure to SAE J2044 fuel and at 1,000 h to engine oil at 125 °C. The flame-retardant package imposes an upper service temperature limit near 150 °C; continuous use above this may shift flame-retardant migration and reduce impact strength. The material is not recommended for direct contact with glycol-based coolants at temperatures above 100 °C without additional end-use validation because hydrolysis of the flame-retardant system may occur over service life.
The processing setup for connector bodies uses a melt temperature of 245 °C to 265 °C and a mould temperature of 50 °C to 80 °C. To prevent damage to preloaded metal pins, injection speed is controlled with a filling time of 1.0 s to 1.5 s for connector bodies with 0.8 mm to 2.0 mm walls. Hold pressure of 50 MPa to 70 MPa is applied after switchover from velocity control to pressure control at 98 % cavity fill. Regrind is limited to 20 wt% and is dried together with virgin granules; the blend must pass UL 94 V-0 at 0.8 mm on weekly production samples. Terminal products include diesel injector connector bodies, transmission control unit mounting brackets, and ABS wheel speed sensor housings.
When residual current operated breaker housings and relay bases are moulded for installation in commercial buildings, the combination of arc ignition resistance, tracking resistance, and low warpage after assembly determines material choice. Grilamid® L 20 H FR is processed at a melt temperature of 240 °C to 260 °C and a mould temperature of 45 °C to 65 °C. The material demonstrates UL 94 V-0 at 0.8 mm and a comparative tracking index of 600 V under IEC 60112, which is relevant for creepage distances under IEC 60664-1. For circuit breaker auxiliary contact blocks, the compound provides dimensional stability after screw fastening because the PA12 matrix absorbs less moisture than PA6 or PA66, reducing post-mould distortion below 0.3 % after 7 days at 40 °C / 90 % RH. The main operational boundary is that the unfilled grade has a lower rigidity than glass-filled FR PA66; load-bearing snap-fit arms must be designed with finite element analysis using tensile modulus from ISO 527-1/-2 rather than assuming PA66 values.
Regrind usage in this segment is restricted to 15 wt% because circuit protection housings are tested for glow-wire resistance under IEC 60695-2-11 at 850 °C for 30 s on 3 mm wall sections; recycled material in excess of 15 wt% can shift the glow-wire ignition response and generate inconsistent batch-to-batch compliance. Drying before moulding uses a desiccant dryer at 80 °C for 5 h; residual moisture is checked by Karl Fischer titration and must not exceed 0.10 %. If colour is required, masterbatch addition is limited to 2 wt%, and a new UL 94 V-0 verification at 0.8 mm is performed on the pigmented compound. Terminal products include RCBO upper and lower housings, relay bases for industrial control panels, and auxiliary contact carrier plates.
Competitive EMS-Grivory Grilamid® L 20 H FR PA12 FR prices that fit your budget—flexible terms and customized quotes for every order.
For samples, pricing, or more information, please contact us at +8615365186327 or mail to admin@ascent-chem.com.
We will respond to you as soon as possible.
Tel: +8615365186327
Email: admin@ascent-chem.com
Flexible payment, competitive price, premium service - Inquire now!
EMS-Grivory Grilamid® L 20 H FR is an unreinforced flame-retardant polyamide 12 compound supplied as cylindrical pellets for injection molding and profile extrusion. The grade designation identifies the base polymer as PA12; the FR suffix denotes a flame-retardant package that achieves a UL 94 V-0 classification at a minimum wall thickness of 0.8 mm when tested according to IEC 60695-11-10. Published manufacturer data list a density of 1.05 g/cm³ under ISO 1183-1 and a saturated water absorption of approximately 1.5% by mass under ISO 62. The material is intended for electrical housings, connectors, cable ties, cable glands, and other components where low moisture uptake, dimensional stability in humid service, and flame retardance are specified. Unlike FR PA66 and FR PA6, the PA12 backbone restricts water uptake to roughly one-fifth to one-sixth of the saturated values typical of PA66 and PA6, which limits humidity-induced dimensional change and stabilizes electrical insulation behavior in applications exposed to condensation or tropical environments.
In confined electrical enclosures, the combustion gas profile of the flame-retardant system is as critical as the UL 94 rating. The halogen-free FR package in Grilamid L 20 H FR avoids brominated aromatic flame retardants and antimony trioxide synergists, thereby reducing the release of acidic halogen gases during forced combustion. Acid gas effluents are quantified by IEC 60754-2; halogen-free compounds typically exhibit pH and conductivity values outside the corrosive range associated with halogenated systems. Smoke density may be evaluated by ISO 5659-2, although published data for this specific configuration is limited. The reduction in corrosive gas release is relevant in data centers, railway electrical cabinets, and marine switchgear where secondary corrosion of metallic contacts after a fire event can be a failure driver.
Compared with brominated FR PA66, the PA12 FR package imposes less density penalty: brominated FR PA66 often exceeds 1.15 g/cm³, while L 20 H FR remains near 1.05 g/cm³. The lower density reduces part mass and supports high-voltage battery peripheral components where weight and dimensional stability are tracked.
Before any thermal processing, residual moisture must be reduced below 0.10% by mass to prevent hydrolysis and surface defects. Drying in a desiccant dryer at 80°C for 4 to 6 hours with a dew point of -30°C or lower is typical. When ambient relative humidity exceeds 60%, drying time should be extended because PA12 pellets re-absorb surface moisture within minutes after dryer discharge. Melt temperature should be held between 220°C and 250°C; barrel profiles on a 25 mm three-zone screw of a 100-tonne hydraulic injection molding machine are commonly set with rear zone 190°C to 210°C, center zone 215°C to 230°C, and nozzle 235°C to 245°C. A mold temperature of 40°C to 60°C is used to balance crystallinity and release. Hold pressures typically fall in the 40 MPa to 60 MPa range; screw speed and back pressure are kept moderate to avoid excessive shear heating.
Thin-wall connectors and sensor housings with nominal wall thickness below 0.8 mm present a processing boundary. The flame-retardant particles increase melt viscosity relative to unfilled PA12, and freeze-off occurs earlier at the flow front. Production-scale trials on 50-tonne to 100-tonne electric injection molding machines show that thin-wall filling requires melt temperatures at the upper end of the 250°C window, injection velocities above 200 mm/s, and switch-over positions advanced by 5% to 10% compared with unfilled PA12. Gate diameters below 0.8 mm have been associated with jetting and surface streaks in this compound because of higher melt elasticity from the flame-retardant package. Increasing the gate diameter by 10% to 20% and using full-round gate geometry are recommended practices for maintaining laminar flow.
Shear heating in thin sections can raise local melt temperature above the recommended upper limit even when barrel set points remain within range. Therefore, screw speed should be limited to 50 min⁻¹ to 100 min⁻¹, and back pressure should not exceed 1.0 MPa unless mixing of color masterbatch requires otherwise. Overheating above 260°C can degrade the flame-retardant synergist and produce plate-out on mold surfaces, loss of UL 94 V-0 classification, and increased volatiles visible as splay at the gate. Published data for this specific configuration is limited, but the operational limits are consistent with PA12 thermal degradation behavior.
For cable management components and conduit produced by profile extrusion, the same moisture control limits apply. A single-screw extruder with a 30:1 L/D general-purpose polyolefin screw and compression ratio of 2.5:1 to 3:1 can process the material when barrel temperatures are ramped from 180°C at the feed zone to 240°C at the die. Melt pressure at the breaker plate is typically maintained below 150 bar to avoid over-shearing the FR package. In corrugated conduit tooling, die temperatures 5°C to 10°C above the melt temperature have been used to prevent melt fracture at high linear speeds; however, published data for this specific configuration is limited.
When evaluated against halogen-free FR PA66 and PA6, Grilamid L 20 H FR trades off elevated-temperature stiffness for lower water uptake and better low-temperature impact retention. Under ISO 527-1/-2, published dry tensile modulus of L 20 H FR is approximately 2,800 MPa, yield stress is approximately 55 MPa, and elongation at break is above 50%. FR PA66 unreinforced grades typically exhibit tensile modulus above 3,000 MPa and HDT/A values 15°C to 25°C higher than L 20 H FR, but they absorb substantially more moisture. The PA12 grade retains a Charpy notched impact strength near 5 kJ/m² at 23°C under ISO 179/1eA, and its glass transition remains below 0°C, which supports ductile behavior in cold installations.
The heat deflection temperature of L 20 H FR is approximately 55°C under ISO 75-2/A at 1.8 MPa and approximately 155°C under ISO 75-2/B at 0.45 MPa. This places the unreinforced PA12 FR below glass-fiber reinforced FR PA66 and FR PA6 in load-bearing hot environments; unfilled PA12 FR is not suitable for continuous load-bearing service above its HDT/A unless the part is supported or the stress level is low. In contrast, PA12 FR offers improved resistance to hydrolysis and many automotive fluids, which is relevant for underhood electrical brackets and battery cooling line clips.
| Property | Test method | Published typical value |
|---|---|---|
| Density | ISO 1183-1 | 1.05 g/cm³ |
| Saturated water absorption | ISO 62 | 1.5% |
| Tensile modulus, dry | ISO 527-1/-2 | 2,800 MPa |
| Yield stress, dry | ISO 527-1/-2 | 55 MPa |
| Elongation at break, dry | ISO 527-1/-2 | >50% |
| Charpy notched impact, 23°C | ISO 179/1eA | 5 kJ/m² |
| Melting point | ISO 11357-1/-3 | 178°C |
| HDT/A, 1.8 MPa | ISO 75-2/A | 55°C |
| HDT/B, 0.45 MPa | ISO 75-2/B | 155°C |
| Flammability, 0.8 mm | IEC 60695-11-10 | V-0 |
| Comparative tracking index | IEC 60112 | 600 V |
The values in the table are typical and not specification limits; lot-specific certificates of analysis govern any contractual acceptance.
Electrical insulation stability in humid service is a decisive difference from FR PA66. Because L 20 H FR absorbs approximately 1.5% water at saturation under ISO 62, surface resistivity and volume resistivity decays are smaller than those of FR PA66 and PA6 when conditioned at 23°C and 50% RH or 85% RH. Published typical volume resistivity for PA12 FR exceeds 10¹² Ω·m under IEC 62631-3-1, but the key engineering advantage is retention of insulation resistance after moisture cycling. This supports use in double-insulated connectors and electric vehicle charging infrastructure where creepage and clearance distances are evaluated under pollution degree 2 or 3 conditions according to IEC 60664-1.
Regulatory documentation for EMS-Grivory Grilamid L 20 H FR typically includes REACH declarations under EC 1907/2006, RoHS recast 2011/65/EU with delegated directive (EU) 2015/863, and FDA 21 CFR or EU 10/2011 statements when food-contact use is evaluated. The grade is generally considered a technical polymer for electrical and electronic equipment rather than for food-contact parts; therefore, food-contact suitability should be verified for the specific article and migration test conditions. For electrical equipment in the European market, material data can support conformity assessment under IEC 62368-1 and IEC 60695 fire hazard testing, but final product approval remains with the end-product manufacturer.
Operational boundaries must be observed. Continuous exposure to hot water above 80°C or strong acids can hydrolyze the PA12 backbone and reduce molecular weight, leading to embrittlement. The compound should not be combined with amine-based antistatic concentrates or certain metal salt additives that can deactivate the halogen-free flame-retardant synergist and compromise UL 94 V-0 performance. If regrind is reused, the maximum recommended addition is typically 20% to 30% by mass, provided the regrind is dry and free of contamination; higher levels can shift viscosity and flame-retardant distribution. Any color masterbatch must use a PA12 carrier and be validated by UL 94 testing at the same minimum wall thickness as the final part, because carbon black and certain pigments can alter ignition resistance.
