| HS Code | 539318 |
| Density | 1.44 g/cm³ |
| Melt Volume Rate | 8 cm³/10 min (275°C, 5 kg) |
| Tensile Modulus | 5400 MPa |
| Tensile Stress At Break | 55 MPa |
| Tensile Strain At Break | 4% |
| Flexural Modulus | 5000 MPa |
| Charpy Impact Strength 23 C Unnotched | 50 kJ/m² |
| Charpy Impact Strength 23 C Notched | 5 kJ/m² |
| Melting Temperature | 178 °C |
| Heat Deflection Temperature 1 80 Mpa | 65 °C |
| Heat Deflection Temperature 0 45 Mpa | 125 °C |
| Ball Indentation Hardness | 130 MPa |
| Water Absorption 24h 23 C | 0.2% |
| Moisture Absorption Equilibrium 23 C 50 Rh | 0.7% |
As an accredited EMS-Grivory Grilamid LKN-5H Nylon 12, 50% Glass Bead Filled, Dry factory, we enforce strict quality protocols—every batch undergoes rigorous testing to ensure consistent efficacy and safety standards.
| Packing | Supplied as dry nylon 12 pellets in sealed, moisture-proof 25 kg bags. Quantity: 25 kg. |
| Container Loading (20′ FCL) | Container loading: 20′ FCL of EMS-Grivory Grilamid LKN-5H (Nylon 12, 50% glass bead filled, dry). Packed in sealed bags/pallets; keep dry, avoid moisture. |
| Shipping | Ship EMS-Grivory Grilamid LKN-5H (Nylon 12, 50% glass bead filled, dry) in sealed, moisture-proof containers to prevent hydrolysis. Avoid exposure to humidity and extreme heat. Standard non-hazardous freight applies. Ensure dry storage below 40°C, and protect from physical damage during transit. |
| Storage | Store in a cool, dry area in its original sealed packaging to prevent moisture absorption, which can degrade the material. Avoid direct sunlight, heat sources, and high humidity. Keep containers tightly closed when not in use. Handle with clean, dry equipment to maintain purity and processability. |
| Shelf Life | Shelf life is indefinite when stored sealed, cool, and dry; protect from moisture and sunlight to preserve properties. |
In high-density automotive connector bodies produced on 8-cavity hot-runner molds with 22 mm core pins and 0.6 mm terminal apertures, EMS-Grivory Grilamid LKN-5H Nylon 12, 50% glass bead filled, dry, is introduced as a neat molding compound where differential shrinkage between flow and transverse directions is the controlling acceptance criterion. The material is processed at a virgin addition rate of 100 wt% for connector housings requiring terminal retention after thermal cycling; regrind from sprues and runners may be reintroduced at a maximum of 15 wt% after dust extraction and desiccant reconditioning to a moisture content below 0.10 % per ISO 15512-1:2022. If masterbatch is required for laser marking or color coding, addition is limited to 1.0–2.0 wt%, because carrier systems with lower melt viscosity can shift weld-line elongation and alter the clearance fit around crimped terminals. Compliance verification for engine-compartment sensor housings typically references SAE/USCAR-2 for electrical connection integrity, ISO 16750-3:2023 for vibration and thermal shock resistance, and IEC 60068-2-38 for combined temperature/humidity cycling at terminal retention features. The grade-specific UL Yellow Card flammability classification must be confirmed before enclosure use, since the 50 wt% glass bead loading does not automatically confer V-0 behavior without flame-retardant additives.
Downstream production on a 120-ton hydraulic injection molding machine with a 25 mm three-zone screw operates with barrel set points of 240–270 °C, a mold temperature of 50–80 °C, and a back pressure of 30–60 bar; screw speed is restricted to 120–180 rpm to limit glass bead fracture during plastication. Cavity pressure transducers record peak packing pressures between 650 bar and 900 bar, and holding pressure time is extended until gate freeze reaches 2.5–3.0 s for 1.8 mm wall sections. Shrinkage measurements per ISO 294-4 show a flow/cross-flow differential below 0.10 percentage point in correctly gated housings, but edge-gated configurations with melt-front convergence around long core pins produce weld-line strength reductions relative to bulk tensile values measured by ISO 527-1/-2. Pre-drying at 80 °C for 4–8 h in a desiccant dryer is mandatory after exposure to relative humidity above 60 % for more than 4 h; nylon 12 exhibits lower moisture uptake than PA66, but bead-matrix debonding can occur above 0.15 % moisture. Terminal finished parts are multi-pin sensor housings, electronic control unit connector shells, and underhood enclosure bodies with inserted brass M3 terminals.
The substitution addresses corrosion in compressed air valve bodies and manifold systems where zinc surface degradation can generate particulate contamination. EMS-Grivory Grilamid LKN-5H Nylon 12, 50% glass bead filled, dry, is molded as a 100 wt% neat compound for solenoid valve end caps, filter-regulator housings, and modular manifold blocks with threaded ports. Brass inserts are used at M4×0.7 and M5×0.8 thread sizes rather than molded-in threads where repeated assembly torque exceeds 0.8 N·m; the high filler loading increases notch sensitivity at thread roots, and comparative notched impact data measured by ISO 179-1/1eA are lower than unfilled PA12. Formulation modification with impact modifiers is generally avoided because it reduces modulus below the stiffness required for flat sealing faces. If regrind is used, it is limited to 10 wt% after screening through a 1.0 mm mesh to remove glass bead agglomerates. Compliance requirements for pneumatic systems reference ISO 4414:2010 for circuit design and component reliability, RoHS Directive 2011/65/EU for restricted substances, and REACH Regulation (EC) No 1907/2006 for substance registration.
Production tooling for valve bodies requires hardened core pins and unscrewing mechanisms with a draft angle of 0.5° on internal threads; glass bead abrasion accelerates wear on ejector sleeves and gate inserts, so nitrided tool steel or diamond-like carbon coatings are specified on high-contact surfaces. Injection molding is performed with melt temperatures of 250–275 °C and mold temperatures of 60–80 °C; the narrow processing window at the upper melt temperature is driven by the need to avoid binder degradation while maintaining sufficient flow length through 0.8 mm diaphragm sections. Packing pressure is held at 750–850 bar for 2.0–2.5 s on 2.0 mm nominal walls, and gate diameter is sized at 60–70 % of local wall thickness to prevent jetting at the entry to the valve cavity. Operational boundaries include avoidance of aggressive alkaline cleaning agents above 60 °C, which can attack the nylon matrix over repeated maintenance cycles. Terminal finished products are pneumatic solenoid valve end caps, compressed air filter-regulator bodies, and modular manifold blocks with metal inserts.
Diagnostic instrument housings with 0.4 mm planar sealing surfaces and fluid channels cannot tolerate sterilization-induced warpage above 0.05 mm across a 120 mm sealing length, which is why EMS-Grivory Grilamid LKN-5H Nylon 12, 50% glass bead filled, dry, is evaluated for immunoassay analyzer manifolds and in-vitro diagnostic pump bodies. The material is used at 100 wt% neat compound without external lubricants, plasticizers, or mineral fillers, because additive migration into reagent paths must be excluded under extractable and leachable testing. Regrind is limited to 10 wt% and only from internally recycled sprues generated from the same cleanroom molding cell. Candidate materials must be assessed under ISO 10993-1:2018 for biological evaluation, ISO 10993-5:2009 for cytotoxicity, and ISO 10993-18:2020 for chemical characterization; if the fluid path is intended for indirect food contact, supplier documentation should verify whether the specific LKN-5H formulation is covered under FDA 21 CFR 177.1500. Gamma sterilization at 25–40 kGy per ISO 11137-1 can oxidize polyamide surfaces and increase yellowness, so accelerated aging under ASTM F1980 is required before final cavity dimension release.
Cleanroom injection molding is conducted with a desiccant dryer set at 80 °C for 4–6 h, melt temperatures of 235–255 °C, and mold temperatures of 60–80 °C. Lower melt temperatures reduce thermal degradation but shorten flow length, so sequential valve gating is used on multi-cavity manifolds to maintain uniform packing. Post-molding annealing at 100 °C for 2 h under nitrogen reduces residual stress at sealing grooves and threaded insert bosses. The glass bead filler produces isotropic shrinkage and resists post-sterilization dimension shift, but published data for this specific LKN-5H configuration after repeated ethylene oxide and gamma cycles is limited; each sterilization modality must be validated with dimensional capability studies on production-representative parts. Terminal finished components are in-vitro diagnostic instrument housings, microfluidic manifolds, and low-pressure reagent pump bodies.
Fuel vapor quick connectors in evaporative emission systems require resistance to hydrocarbon exposure combined with dimensional stability at barb retention features. EMS-Grivory Grilamid LKN-5H Nylon 12, 50% glass bead filled, dry, is molded as a 100 wt% base compound for connector bodies, purge valve fittings, and tank vent couplings. Color masterbatch, when used for identification, is added at 0.5–1.0 wt%; external plasticizers are excluded because they increase fuel vapor migration. Regrind is limited to 10 wt% and must be dried to below 0.10 % moisture before blending, because hydrolysis at the bead-matrix interface reduces barb pull-out resistance. Compliance testing references SAE J2044 for quick connector performance, ASTM D638-14 for tensile properties, and SAE J2659 for permeation measurement where system-level evaporative emission limits apply. Material-level compliance with RoHS Directive 2011/65/EU and REACH Regulation (EC) No 1907/2006 is applied to all export-ready components.
Two-plate cold-runner injection molding uses a gate positioned away from the retention barb root, because weld lines at the barb reduce snap engagement force by concentrating short glass bead particles at the melt-front boundary. Barrel temperatures are set at 245–270 °C, mold temperature at 60–80 °C, and packing pressure at 700–850 bar for 1.2–1.8 s. After molding, connector bodies are conditioned for 24 h at 23 °C and 50 % relative humidity before dimensional inspection, because dry-as-molded nylon 12 continues low-level moisture absorption that alters O-ring groove circularity. Leak testing is performed at 3.0 bar with dry air after insertion of the mating tube to verify barb retention and seal compression. Terminal finished products are EVAP quick connector bodies, purge valve fittings, and fuel tank vent couplings operating at underhood temperatures from −40 °C to 120 °C.
Recirculating pump wear rings in hot water systems are machined from 80 mm extruded plate stock of EMS-Grivory Grilamid LKN-5H Nylon 12, 50% glass bead filled, dry, because the isotropic bead geometry minimizes anisotropic growth after water absorption and reduces contact-face distortion. For pressure-bearing wear rings and impeller shrouds, the material is used as 100 wt% extruded stock without regrind; non-pressure shims and bearing carriers may contain up to 15 wt% clean internal regrind after moisture reconditioning. NSF/ANSI/CAN 61 certification for potable water contact is product-specific and not inherent for LKN-5H, so supplier documentation must be reviewed before municipal water system use. General compliance for industrial pump components includes ISO 15512-1:2022 for moisture content verification, ISO 527-1/-2 for tensile property retention after water immersion, and ISO 62:2008 for moisture absorption measurement. Published data for the specific LKN-5H configuration after 1,000 h of continuous hot water exposure at 80 °C is limited; hydrolytic aging must be validated on the actual cross-section.
Machining from plate stock uses tungsten carbide inserts with positive rake geometry at cutting speeds below 180 m/min to avoid melting the nylon matrix; glass bead filler accelerates flank wear on roughing tools, so insert life is monitored by surface finish on the wear ring bore. Dimensional stabilization is performed after rough machining by annealing at 100 °C for 4 h, followed by finish turning and PCD reaming of clearances. Compared with unfilled nylon 12, the 50 wt% glass bead filled grade provides higher compressive stiffness under radial loads but lower ductility during press-fit assembly; interference fits above 0.15 mm on metallic shafts can cause hoop cracking and must be avoided unless stress-relief grooves are added. Terminal finished parts are centrifugal pump wear rings, impeller shrouds, and bearing carriers in low-pressure recirculating loops.
In fire alarm control panel frames with snap-fit latches and PCB standoffs, the 50 wt% glass bead loading in EMS-Grivory Grilamid LKN-5H Nylon 12 creates a specific processing envelope between dimensional accuracy and snap-fit strain tolerance. The material is processed as 100 wt% neat compound for non-flame-retardant electronic enclosure frames, card guides, and standoff arrays; flame-retardant requirements above UL 94 HB cannot be met by this grade without selecting a halogenated or halogen-free FR variant. Formulation addition of antistatic masterbatch is limited to 1.0 wt% where surface resistivity control is required, because higher loadings reduce weld-line strength at standoff bases. Compliance verification references IEC 60664-1 for insulation coordination, IEC 60695-2-11 for glow-wire ignition resistance, and UL 94 for flammability classification; the end device must be tested as a complete assembly because material approval alone does not satisfy enclosure fire safety requirements.
Valve-gated injection molding on a 150-ton clamp force machine uses melt temperatures of 250–270 °C, mold temperatures of 70–80 °C, and filling speeds calculated to maintain a flow-front velocity below 250 mm/s through 1.5 mm snap-latch sections. The high bead content lowers mold shrinkage and stabilizes standoff center-to-center positions, but it also reduces permissible strain in snap-fit latches; latch deflection must be verified by ISO 178 flexural testing on molded bars, and release angles are increased to 2.0° to prevent stress whitening. Drying before molding is maintained at 80 °C for 4–6 h to below 0.10 % moisture, because moisture above 0.12 % causes surface splay on textured enclosure surfaces and variations in standoff height. Terminal finished products are fire alarm control panel frames, PCB card guides, snap-fit latch carriers, and electrical cabinet standoff inserts.
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The designation EMS-Grivory Grilamid LKN-5H Nylon 12, 50% Glass Bead Filled, Dry refers to a heat-stabilised polyamide 12 injection-moulding compound containing 50% by weight of spherical glass bead filler. The term “Dry” identifies the moisture condition under which the stated mechanical values are obtained: dry-as-moulded specimens with residual moisture content below 0.10% by weight, prepared and conditioned in accordance with ISO 1110. In this condition the compound has a nominal density of 1.44 g/cm³ measured to ISO 1183. Tensile modulus obtained on Type 1A specimens under ISO 527-1/-2 is approximately 3000 MPa, and tensile strength at break is approximately 55 MPa with strain at break around 5%. The spherical filler structure produces a largely isotropic mechanical response and a mould shrinkage distribution that differs from short-glass-fibre polyamide 12 grades. The material is supplied in sealed multilayer packaging to preserve the dry state until processing. Because polyamide 12 has a lower amide group density than polyamide 6 or polyamide 66, water absorption and the resulting dry-to-conditioned property shift are smaller, although not zero. The data below represent nominal dry-condition values from the manufacturer technical literature; production lot tolerances may vary.
| Property | Standard | Nominal value |
|---|---|---|
| Density | ISO 1183 | 1.44 g/cm³ |
| Tensile modulus | ISO 527-1/-2 | 3000 MPa |
| Tensile strength at break | ISO 527-1/-2 | 55 MPa |
| Strain at break | ISO 527-1/-2 | 5% |
| Charpy notched impact, +23 °C | ISO 179/1eA | 6 kJ/m² |
| Charpy unnotched impact, +23 °C | ISO 179/1eU | 40 kJ/m² |
| Melting point, DSC | ISO 11357-1/-3 | 178 °C |
| Heat deflection temperature, 1.8 MPa | ISO 75-1/-2 | 75 °C |
| Heat deflection temperature, 0.45 MPa | ISO 75-1/-2 | 145 °C |
| Coefficient of linear thermal expansion, 23–55 °C | ISO 11359-1/-2 | 80 × 10−6 K⁻¹ |
| Mould shrinkage | ISO 294-4 | 0.4–0.7% |
Spherical glass bead fillers at 50% by weight reduce anisotropic shrinkage because the beads do not orient strongly in the flow direction as fibres do. In fibre-reinforced polyamide 12, flow-induced orientation creates a modulus and shrinkage differential between parallel and normal directions; in bead-filled LKN-5H the differential is measurably lower. Mould shrinkage measured according to ISO 294-4 on a two-cavity plaque mould is typically below 1.0%, with nominal manufacturer values often in the 0.4–0.7% range depending on wall thickness and gate geometry. The coefficient of linear thermal expansion in the dry state is approximately 80 × 10−6 K⁻¹ over the interval 23–55 °C, compared with approximately 120 × 10−6 K⁻¹ for unfilled polyamide 12. This difference is relevant in precision housings, sensor brackets, pump bodies, and fluid-handling components where post-mould warpage below 0.3 mm across a 200 mm span is a production acceptance criterion. On production coordinate measuring machines, bead-filled grades show lower edge-to-edge deviation in roundness measurements than short-glass-fibre grades at the same filler mass fraction. Published data for direct fibre/bead comparisons in identical multi-cavity tools is limited, but the isotropy argument follows from the filler aspect ratio and is reflected in EMS technical moulding literature. The trade-off is lower notch resistance than short-glass fibre compounds and a higher density than unfilled PA12.
Before melt processing, the dry state must be preserved or restored. Polyamide 12 absorbs moisture more slowly than PA6 or PA66, but surface moisture uptake above 0.10% causes splay and viscosity loss during plastication. If ambient relative humidity exceeds 60%, pellets exposed to plant air for more than 30 min should be re-dried in a desiccant dryer at 80 °C for 4–6 h. The drying air dew point should be ≤ −30 °C. On a 40:1 L/D twin-screw extruder used for compounding or reprocessing, the glass bead phase increases melt viscosity; barrel temperature settings in the melting zone are maintained at 220–250 °C, and melt temperature should not exceed 260 °C for more than 5 min residence time. Injection moulding is performed at melt temperatures of 230–260 °C with mould temperatures of 40–60 °C. Mould temperatures below 40 °C increase weld-line weakness and surface dullness, while temperatures above 70 °C lengthen cycle time without significant crystallinity gain. Holding pressure is typically 60–90 MPa hydraulic pressure, and backpressure at 0.5–1.5 MPa is used to homogenise the bead distribution. On production-scale injection moulding machines with clamp force from 800 to 2500 kN, shot weight control within ±0.5% is recommended because the high filler content reduces melt compressibility. The shot volume should ideally occupy between 20% and 80% of barrel capacity to limit residence-time variability.
Dry-as-moulded mechanical values are not service values at equilibrium moisture. Polyamide 12 at 23 °C and 50% relative humidity absorbs approximately 0.5–0.7% water by weight, and saturation in water at 23 °C is approximately 1.1%. The absorbed water plasticises the matrix, lowering tensile modulus from the dry value of roughly 3000 MPa to approximately 2400–2600 MPa at equilibrium 50% RH. Charpy notched impact may increase modestly because matrix ductility improves, whereas tensile strength decreases. For dimensional stability, moisture swelling of a glass-bead-filled PA12 is generally below 0.3% linear change from dry to 50% RH. This behaviour is evaluated using ISO 62 water absorption and ISO 1110 accelerated conditioning. In service conditions where parts are intermittently wetted, the dry property data should not be used for design without applying a moisture correction factor. Published data for this specific configuration is limited regarding long-term creep at elevated humidity, so design verification under DIN EN ISO 899-1 with preconditioned specimens is required for load-bearing parts.
Compared with short-glass-fibre reinforced PA12, the 50% glass bead compound sacrifices some tensile strength and notched impact resistance but provides lower warpage, improved surface uniformity, and more consistent shrinkage across flow and transverse directions. A short-glass-fibre PA12 grade at 30% fibre loading may show tensile modulus above 6000 MPa and tensile strength above 100 MPa, while LKN-5H tensile strength remains near 55 MPa. However, fibre grades can show mould shrinkage of 0.2–0.3% in the longitudinal direction and 0.8–1.0% in the transverse direction; glass bead grades compress that spread to roughly 0.1–0.2 percentage points under identical moulding conditions. Surface quality of a glass-bead-filled part is more uniform because spherical beads do not protrude through the polymer skin as fibres do. Against unfilled polyamide 12, LKN-5H increases density from approximately 1.01 g/cm³ to 1.44 g/cm³, raises tensile modulus from approximately 1500 MPa to 3000 MPa, and reduces strain at break from over 200% to 5%. Against mineral-filled PA12, glass beads improve flow and reduce machine wear because the spherical filler has lower aspect ratio and smaller surface area than plate-like talc or calcined clay at the same mass fraction.
Chemical resistance derives from the PA12 backbone. Unlike PA6 and PA66, PA12 has lower amide density and lower water affinity. It resists aliphatic hydrocarbons, fuels, oils, greases, dilute alkaline solutions, and many solvents at ambient temperature, but is attacked by strong mineral acids, phenols, cresols, and concentrated formic acid. Long-term exposure to hot water above 80 °C or steam should be assessed because hydrolysis reduces molecular weight and tensile strength. For fuel-contact parts, testing to SAE J2260 or ISO 1817 with specific test fluids is required. The heat-stabilising package in the H suffix provides retention of mechanical properties after short-term heat ageing; continuous-use temperature claims must be verified according to UL 746B or equivalent end-use testing on the actual moulded part. Regulatory status is identified in the supplier safety datasheet; the base polymer typically complies with REACH, RoHS 2011/65/EU, and may meet UL 94 HB flammability at the minimum tested thickness. Specific food-contact or medical conformity should be confirmed with EMS-Grivory because additive packages can vary by production site. Processing fumes must be extracted because polyamide decomposition products are irritant at elevated temperatures.
Typical usage includes precision fluid-handling components, pneumatic valve bodies, pump housings, low-voltage electrical housings, sensor brackets, and parts that require tight flatness tolerances after machining. Because glass beads are isotropic, machined surfaces may show less directional variation than fibre-reinforced grades. In automated assembly, the lower water absorption of PA12 reduces dimensional drift in humid production areas compared with PA6 or PA66 compounds. The glass bead filler also provides isotropic compressive strength; applications requiring high gear tooth bending stress or sharp notches should use short-glass fibre grades instead. In production, the material has been processed on vertical injection moulding machines for encapsulated inserts, but published field data for insert-moulded LKN-5H parts in high-thermal-expansion metal combinations is limited.
