| HS Code | 407199 |
| Density | 1.03 g/cm³ |
| Melt Volume Rate | 3 cm³/10 min at 190°C/2.16 kg |
| Tensile Modulus | 1300 MPa |
| Tensile Stress At Yield | 45 MPa |
| Elongation At Break | 200% |
| Charpy Notched Impact Strength At 23 C | 8 kJ/m² |
| Shore D Hardness | 70 |
| Melting Temperature | 178°C |
| Vicat Softening Temperature At 10 N | 150°C |
| Water Absorption After 24 H At 23 C | 0.2% |
As an accredited Arkema Rilsamid MA 4411 BLACK PA12-I factory, we enforce strict quality protocols—every batch undergoes rigorous testing to ensure consistent efficacy and safety standards.
| Packing | Arkema Rilsamid MA 4411 BLACK PA12-I is supplied in 25 kg moisture-proof sealed bags, ready for dry storage and processing. |
| Container Loading (20′ FCL) | 20′ FCL loading of Arkema Rilsamid MA 4411 Black PA12-I: palletized bagged granules, securely stowed, weight optimized, protected for safe transport. |
| Shipping | Rilsamid MA 4411 Black is a polyamide 12 resin supplied as moisture-sensitive pellets. Ship in sealed original bags or drums, protected from humidity, heat, and direct sunlight. Use dry, ventilated containers; avoid crushing or puncturing. Not classified as dangerous goods under standard transport regulations. |
| Storage | Store Rilsamid MA 4411 BLACK PA12 in its original, unopened packaging in a cool, dry, well-ventilated area. Protect from direct sunlight, heat sources, and humidity, as moisture absorption can degrade quality. Keep containers tightly sealed when partially used. Ideal storage below 30°C; proper conditions maintain shelf life for approximately two years. |
| Shelf Life | Shelf life is typically 2 years from delivery when stored sealed, dry, and cool, protected from moisture and sunlight. |
Fuel vapor quick connectors and tank vent valves are injection-molded from Rilsamid MA 4411 BLACK PA12-I where end-use validation follows SAE J2044 dimensional and functional envelopes for automotive liquid fuel and vapor system couplings, in combination with ISO 19013-1 fuel hose assembly test conditions for elastomer-to-thermoplastic interfaces. The formulation addition ratio is normally 100 wt% virgin resin, with closed-loop regrind of sprues and runners capped at 15 wt% after trial validation; higher levels are not permitted because carbon black concentrate dispersion from reground black parts is batch-dependent, and the resulting weld-line burst retention can fall below the 1,200 kPa minimum required on the quick-connector body. Desiccant-bed drying at 80 °C with a dew point of −30 °C for 4–6 h is applied before plasticating; residual moisture above 0.10 wt% produces splay and molecular weight loss during screw shear, reducing collapse resistance at the zinc-plated barb interface. Barrel temperatures are set from 235 °C at the feed throat to 250 °C at the nozzle, with mold temperature controlled at 40–60 °C to stabilize snap-fit leaf retention after post-mold moisture conditioning. The gate location is the primary process conflict: placing an edge gate on the thin snap-fit arm creates a weld line at maximum hoop stress, whereas gating into the connector shank or using a tab gate outside the flexing beam moves the knit line away from the sealing path. End product types include fuel tank quick connectors, vapor canister fittings, roll-over valve housings, and evaporative emission system adapters.
Under engine compartment temperature cycling, cable tie locking retention is controlled by moisture-conditioned PA12 stiffness, pawl flexural recovery after demolding, and the tooth profile’s resistance to cold flow at the locking face. Rilsamid MA 4411 BLACK PA12-I is injection-molded into engine-harness cable ties where OEM specifications commonly require intermittent service at −40 °C to 125 °C; compliance for electrical installation components is anchored to UL 62275 cable tie testing for tensile retention after heat aging, flammability, and low-temperature impact, with flammability classification under UL 94 at the minimum molded thickness. Because carbon black lowers comparative tracking index relative to natural PA12, IEC 60112 tracking tests on the black molded component are used rather than generic resin data for insulated accessories. The formulation addition ratio is 100 wt% virgin MA 4411 BLACK for UL-listed ties; same-color sprues and runners may be reworked at 20 wt% maximum when the molder has verified jaw tensile retention after long-term heat exposure according to the lot-specific UL file. Production uses four- to eight-cavity cold-runner molds, melt temperature 240–250 °C, mold temperature 20–40 °C, and packing pressure high enough to prevent sink at the pawl base. Mold temperature above 50 °C is intentionally avoided because it retards tooth flexural recovery and extends cycle time without improving locking engagement. The dominant defect is gate blush on the pawl face, which reduces tooth sharpness and increases insertion force variability across cavities. The molded part range covers engine-harness cable ties, convoluted conduit clips, push-mount harness fasteners, and battery cable retention clamps.
Push-in pneumatic fitting bodies threaded to G 1/8 or G 1/4 ports are produced from Rilsamid MA 4411 BLACK PA12-I when the fitting must retain collet gripping force under compressed air pulsation and cannot tolerate the excessive moisture swell of PA6 in variable shop-air humidity. The governing standard is ISO 14743, which defines dimensional, leakage, and pull-out test requirements for push-in connectors used with polyamide and polyurethane tubes; ISO 6358-1 is referenced for flow coefficient verification when the fitting is used in flow-control circuits. The formulation addition ratio is 100 wt% virgin resin, and regrind from rejected fitting bodies is limited to 10 wt% because uncleaned regrind carries thread-cutting lubricant into the melt and produces specks plus non-uniform collet slot dimensions. Drying at 80 °C for 4 h to a residual moisture limit of 0.08 wt% is followed by injection at melt temperatures 230–245 °C and mold temperatures 40–60 °C. For a 32-cavity push-in connector body tool, clamp force is typically set at 1,200–1,800 kN depending on projected area. The critical dimensional risk is post-mold drift in collet slot width: demolding at 60 °C yields more complete crystallization but requires 24 h conditioning at 23 °C ± 2 °C and 50% RH before go/no-go gauges are applied; parts measured immediately after demolding can appear undersized and be falsely rejected if moisture uptake has not reached service equilibrium. Final fittings produced in this window include compressed-air push-in connectors, flow-control restrictors, branch unions, and thread-to-tube adapters.
| Application scenario | Maximum same-color regrind | Residual moisture limit before molding | Melt temperature window | Mold temperature window | Primary compliance anchor |
|---|---|---|---|---|---|
| Fuel vapor quick connectors | 15 wt% | 0.10 wt% | 235–250 °C | 40–60 °C | SAE J2044 |
| Cable ties and harness fasteners | 20 wt% | 0.10 wt% | 240–250 °C | 20–40 °C | UL 62275 |
| Push-in pneumatic fittings | 10 wt% | 0.08 wt% | 230–245 °C | 40–60 °C | ISO 14743 |
| Battery coolant couplings | 15 wt% | 0.10 wt% | 230–250 °C | 60 °C | ISO 16750-4 |
| Underbody clips and brackets | 25 wt% | 0.10 wt% | 240–255 °C | 30–50 °C | ISO 9227 |
| Off-highway retaining clamps | 5 wt% | 0.10 wt% | 235–245 °C | 50 °C | IEC 60068-2-6 |
In battery thermal management, batch-to-batch variation in moisture uptake after molding is the primary reason couplings are annealed before dimensional inspection rather than assembled directly from the tool. Rilsamid MA 4411 BLACK PA12-I is selected for coolant quick connectors on the outside of battery packs because its low water absorption relative to PA66 reduces thread loosening when ambient humidity shifts from 20% to 80% RH, but it is not fully hydrolysis-proof at elevated glycol temperatures. End-use validation for electric vehicle coolant circuits typically follows ISO 16750-4 thermal cycling between −40 °C and 90 °C, with pressure cycling derived from OEM coolant circuit specifications rather than a single ISO standard. Published data for this specific black injection grade in long-term ethylene glycol/water contact at 90 °C is limited; processors therefore expose molded tensile bars to 50:50 ethylene glycol/water at 90 °C for 1,000 h and track ISO 527-2 stress at break, applying an acceptance limit established by the end user instead of assuming a generic hydrolysis rating. The formulation addition ratio is 100 wt% virgin MA 4411 BLACK; regrind from sprues and runners is capped at 15 wt% when the parts are not in direct contact with energized battery bus bars. Injection molding uses a reciprocating screw with 20:1 to 25:1 L/D ratio and compression ratio 2:1 to 2.5:1, barrel profile 230–250 °C, and mold temperature 60 °C; gate location is kept away from barb undercuts to reduce shear-induced molecular orientation at the sealing surface. After demolding, couplings are annealed at 90 °C for 2 h in dry air to stabilize crystalline structure before thread go/no-go checks. Produced part configurations include battery coolant quick connectors, degas bottle fittings, cooling plate adapters, and high-voltage cable pass-through support rings.
Zinc chloride from galvanized steel and road salt stress-cracks PA66 more readily than PA12, and the lower chloride uptake of PA12 helps retain clip engagement force after cyclic salt exposure. Rilsamid MA 4411 BLACK PA12-I is used for underbody clips and brackets where ISO 9227 neutral salt spray exposure is specified for 480–1,000 h depending on the corrosion class, with post-exposure clip insertion and removal force measured on a tensile tester at 50 mm/min. Additional compliance references for temperature and humidity service are derived from ISO 16750-4, but the salt-exposure limit is always set by the OEM corrosion department because salt spray is an environmental test, not a direct material property test. The formulation addition ratio is 100 wt% virgin MA 4411 BLACK; regrind is increased to 25 wt% only for clips that do not carry brake fluid or fuel line loads, because these parts are over-molded onto metal brackets and the over-molding interface obscures minor regrind-related surface variation. Injection molding of long-flow underbody clips uses melt temperature 240–255 °C, mold temperature 30–50 °C, and a fill time below 1.2 s to avoid hesitation at thin hinge regions; hesitation marks reduce flexural fatigue life in ISO 178 three-point bending after salt spray conditioning. Heavy knit lines at the base of cantilever snap arms are excluded from load-bearing areas because salt crystals penetrate the knit-line notch and reduce engagement force after repeated service. The principal components manufactured under this scenario are brake line routing clips, fuel filler door brackets, underbody wiring guides, and pressure tube spacers.
When vibration frequency sweeps expose injection-molded retaining clamps in off-highway equipment, the observed failure mode is usually not fatigue crack initiation but creep of the clamping jaw at the hose contact line after sustained contact with a warm hydraulic oil film. Rilsamid MA 4411 BLACK PA12-I is used for clamps subjected to sinusoidal vibration across 10–500 Hz at 0.5–1.0 g, where natural rubber or polyurethane separators are insert-molded after the plastic body is produced. Validation follows IEC 60068-2-6 for sine sweep vibration, with the oil-contact region evaluated after immersion in hydraulic oil at 80 °C for 168 h; tensile load retention on the closed jaw is measured because PA12 shows less oil-induced swelling than PA6 but not zero. The formulation addition ratio is 100 wt% virgin MA 4411 BLACK; regrind is restricted to 5 wt% maximum when the clamp body carries a metal insert because higher regrind fractions reduce insert pull-out force measured on a tensile tester after thermal shock. Insert molding uses barrel temperature 235–245 °C, mold temperature 50 °C, and a decompression stroke after plasticating to prevent drool at the insert interface. Clamp jaw geometry is adjusted to compensate for PA12’s lower creep modulus at 80 °C, and the retained jaw force is verified after 168 h at 80 °C rather than at room temperature only. Typical production parts in this category are hydraulic hose clamps, cable retaining brackets, fuel tank strap isolators, and quick-release fluid line spacers.
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Arkema Rilsamid MA 4411 BLACK PA12-I is a black-pigmented, impact-modified polyamide 12 injection-moulding grade designated under ISO 1874-1 as PA12-I. The grade is supplied as cylindrical granules and contains a discrete elastomeric impact modifier, which differentiates it from unmodified PA12 through lower dry-as-molded tensile modulus and higher notched Charpy impact energy at low temperature. The melt temperature range commonly applied in injection molding is 220°C to 260°C, with mold temperatures between 40°C and 80°C; the exact set points depend on wall thickness, gate geometry, and screw recovery time. The product combines the low water absorption of PA12—typically 0.6% to 0.8% at saturation in 23°C water when tested to ISO 62—with resistance to aliphatic hydrocarbons, oils, greases, and zinc chloride solutions. Applications include snap-fit clips, cable ties, fasteners, and fluid-system connectors that require dimensional stability in humid or wet conditions and retention of ductile failure below 0°C. Compared with unmodified PA12, the impact modifier in PA12-I shifts the ductile-to-brittle transition to lower temperatures but reduces stiffness and heat deflection temperature; compared with PA6 and PA66, the material exhibits lower equilibrium moisture uptake and lower density, which reduces post-molding dimensional movement in snap-fit closures.
The product specification is normally structured around the following test methods and standard designations. Lot certificates should be reviewed for actual values.
| Standard | Property or Scope | Relevance to MA 4411 BLACK PA12-I |
|---|---|---|
| ISO 1874-1 | Designation system for polyamide moulding materials | Encodes polyamide 12, impact modification and colour state |
| ISO 1043-1 | Symbols for plastics | Confirms PA12-I abbreviation |
| ISO 1183-1 | Density | Typical value near 1.01 g/cm³ |
| ISO 62 | Water absorption in 23°C water | Saturation range 0.6%–0.8% |
| ISO 527-1/-2 | Tensile modulus and tensile stress | Stiffness and short-term loading behaviour |
| ISO 179-1/1eA | Charpy notched impact strength | Low-temperature ductility and modifier effectiveness |
| ISO 11357-1/-3 | Melting temperature by DSC | Processing window verification |
| ISO 75-1/-2 | Heat deflection temperature | Short-term heat resistance under 0.45 MPa |
| IEC 62631-3-1 | Volume resistivity | Confirms insulating character, typically above 1E12 Ω·m |
| IEC 60112 | Comparative tracking index | Electrical safety in humid or polluted service conditions |
| ISO 175 | Immersion testing | Chemical resistance validation in fuel, coolant, or oil |
The principal processing limits are moisture, melt residence time, and nozzle temperature stability. The material should be predried to a residual moisture level below 0.15%, preferably below 0.10%, using a desiccant dryer with air dew point below −30°C. Drying at 80°C for 4 to 6 hours is typical; exposure of pellets to air at relative humidity above 60% for periods exceeding 30 minutes can raise surface moisture and produce splay in molded parts. Melt temperatures above 260°C accelerate thermo-oxidative chain scission in PA12, causing a reduction in molecular weight and a corresponding loss of notched impact strength. For thin-walled parts, nozzle set points of 245°C to 250°C are often used to prevent freeze-off at the nozzle tip; below 230°C short shots may occur in multi-cavity tools with long cold-runner drops because the solidification layer thickens faster than the screw can recover. The maximum recommended barrel residence time at melt temperature is approximately 10 minutes; beyond this threshold, black-pigmented PA12 grades can develop visible yellowing and surface delamination after thermal-oxidative degradation.
Injection machines should be equipped with a general-purpose or low-compression screw with a length-to-diameter ratio of 18:1 to 22:1 and a compression ratio near 2.5:1. Shot sizes should use 50% to 75% of the barrel capacity to limit residence time. Back pressure in the range of 0.5 MPa to 1.5 MPa is typical to homogenize the melt without adding excessive shear heating. Semicrystalline PA12 solidifies rapidly, so gates should be positioned at the thickest section to avoid sink marks, and mold venting depths of 0.01 mm to 0.02 mm are required to avoid burn marks from compressed air. These values represent general PA12 injection-molding practice; final process parameters should be taken from the Arkema technical data sheet and lot-specific certificate of analysis.
Rheological behaviour of impact-modified PA12 grades differs from unmodified PA12 in two measurable respects: the melt shows higher viscosity at low shear rates because of the dispersed elastomer phase, and the viscosity-shear-rate curve is more shear-thinning because the impact modifier phase elongates under shear. In spiral flow tests conducted at 250°C melt temperature and 60°C mold temperature, PA12-I grades typically fill a 2-mm-thick spiral to lengths of 300 mm to 450 mm, depending on injection pressure; published data for this specific MA 4411 configuration is limited because spiral flow values are tool- and machine-dependent. Molding trials on a 25-mm single-screw reciprocating injection unit with 20:1 L/D have demonstrated that reducing the melt temperature from 250°C to 235°C increases screw recovery time by 10–20% and raises the injection pressure required to achieve full cavity packing by 8–15% in thin-walled snap-fit parts. The shear-rate dependence should be considered when changing from a cold-runner to a hot-runner system: hot-runner channels with long residence zones can degrade the impact modifier at heater overshoot and reduce Charpy impact energy by more than 15% if temperature control exceeds ±5°C.
The most significant differences between Rilsamid MA 4411 BLACK PA12-I and an unmodified PA12 molding grade are observed in stiffness, low-temperature ductility, and melt viscosity. The impact modifier reduces tensile modulus from the 1300–1500 MPa range typical of unmodified PA12 to approximately 1000–1200 MPa under ISO 527-1/-2, while increasing notched Charpy impact energy at −30°C. Compared with PA11, PA12 generally exhibits lower water absorption at saturation and a slightly lower melting point, which reduces the energy required for plastication but may require tighter nozzle temperature control. Compared with PA6 and PA66, the PA12 backbone has a lower density of amide linkages, which reduces hydrogen bonding and lowers equilibrium moisture uptake; this difference is the primary reason for improved dimensional stability in humid environments.
In practice, the choice between impact-modified PA12 and unmodified PA12 depends on whether the part must survive snap-fit assembly at low temperature. A closure tab on an automotive fuel-line connector molded from unmodified PA12 may fracture during installation below −20°C when the part is oriented perpendicular to flow; the same tool run with PA12-I typically withstands installation because the notched Charpy energy at −30°C remains above 5 kJ/m². The penalty is a reduction in tensile modulus, which may require increasing the nominal wall thickness by 0.2 mm to 0.5 mm to recover snap-fit holding force. PA11 offers similar low-temperature ductility and is often selected for flexible tubing rather than injection-molded rigid clips because of its different crystallization rate; PA12-I gives faster setup in thin-wall molds and lower water absorption at equilibrium. Published property data for direct substitution in high-pressure fuel-contact parts are limited, and any material change should be validated by immersion testing to ISO 175 with the production fuel or coolant.
Black pigmentation in Rilsamid MA 4411 BLACK PA12-I is achieved with carbon black, which modifies the surface resistivity and ultraviolet weathering behaviour. The volume resistivity under IEC 62631-3-1 remains above 1E12 Ω·m, indicating that the material is an electrical insulator rather than a conductive or static-dissipative compound. For outdoor applications, carbon black provides a UV-stable surface layer, but long-term performance should be confirmed by weathering to ISO 4892-2 cycle 1 or by direct outdoor exposure in the target climate. The grade should not be used where a continuous antistatic surface resistivity below 1E11 Ω is specified unless an additional antistatic additive is incorporated, which is not part of the standard MA 4411 BLACK formulation. The comparative tracking index of 600 V under IEC 60112 supports use in basic insulation for appliances and connectors, provided that the final wall thickness meets the applicable product standard.
Replacement of PA6 or PA66 by PA12-I is justified when part dimensions must remain stable across relative-humidity cycles. A PA66 glass-free part conditioned at 23°C and 50% relative humidity absorbs roughly 2.5% to 3.0% water by mass, causing linear dimensional change of 0.5% to 0.7%, whereas PA12-I absorbs less than 0.8% at saturation. This differential is most visible in snap-fit closures, cable ties, and electrical connectors where opening force changes when polyamide moisture content changes. In field use, PA12-I parts retain a more constant flexural modulus after humidity cycling than PA6/66 parts of equivalent glass-free composition. The lower density, 1.01 g/cm³ versus 1.12–1.14 g/cm³ for PA66, also reduces part weight by approximately 10% at equal volume.
Substitution, however, has limits. PA6 and PA66 generally exhibit higher tensile modulus and higher heat deflection temperature than PA12-I. In applications requiring continuous exposure above 90°C under load, PA12-I may creep more than a glass-reinforced PA66; the impact-modified PA12 grade is not intended for underhood components that experience both high stress and temperatures above 120°C. The material should not be used in contact with hot concentrated sulfuric acid, phenols, cresols, or chlorinated solvents at elevated temperatures; these media dissolve or swell PA12. Chemical resistance data generated by immersion in aliphatic hydrocarbons and zinc chloride solutions are relevant to automotive and industrial fluid handling. Impact-modified PA12 grades generally resist zinc chloride at 50°C for extended periods, which is an important criterion in automotive coolant connectors and road-salt environments. However, resistance to glycol-based coolants depends on coolant chemistry, pH, and inhibitor package; immersion testing per ISO 175 at the expected service temperature and concentration is required. Polar solvents such as methanol and ethanol can plasticize PA12, and hot concentrated mineral acids, phenol, cresol, and chlorinated solvents should be avoided because they dissolve or swell the polyamide matrix. These limitations apply to Rilsamid MA 4411 BLACK PA12-I because the impact modifier phase may be more susceptible to solvent attack than the polyamide phase, particularly in ester-containing solvent blends.
In a 16-cavity cold-runner cable-tie tool running on a 40-mm hydraulic injection unit with 20:1 L/D, the use of Rilsamid MA 4411 BLACK PA12-I is associated with fewer brittle breaks during cable tie pawl insertion at assembly stations maintained at 5°C than unmodified PA12 batches of the same viscosity class. The molded cable ties are conditioned at 23°C and 50% relative humidity for 24 hours before assembly; conditioning increases moisture from the dry-as-molded value of 0.05% to roughly 0.2%, which improves ductility. Gate freeze time is shorter than PA11 in the same tool because of the lower melting point and rapid crystallization of PA12, allowing a cycle time reduction of 0.3 to 0.8 seconds per shot. The black pigmentation from carbon black provides stable colour during regrind incorporation up to 20% by weight, but regrind levels above 20% may increase melt viscosity and reduce notched Charpy impact energy because of molecular weight loss during repeated processing. Compliance documentation for RoHS Directive 2011/65/EU and REACH SVHC reporting should be requested from the supplier for the lot used, because carbon black type and processing aids can vary by production site.
