| HS Code | 599642 |
| Material | EMS-Grivory Grilamid LVX-50H nat Nylon 12, 50% Glass Fiber Filled |
| Condition | Conditioned |
| Glass Fiber Content | 50% |
| Density | 1.59 g/cm3 |
| Tensile Strength | 150 MPa |
| Tensile Modulus | 10500 MPa |
| Elongation At Break | 5% |
| Flexural Strength | 180 MPa |
| Flexural Modulus | 10000 MPa |
| Charpy Impact Strength Notched | 8 kJ/m2 |
| Melting Point | 178 °C |
| Heat Deflection Temperature At 1 8 Mpa | 165 °C |
| Water Absorption At Saturation | 0.8% |
| Linear Mold Shrinkage | 0.15% |
As an accredited EMS-Grivory Grilamid LVX-50H nat Nylon 12, 50% Glass Fiber Filled, Conditioned factory, we enforce strict quality protocols—every batch undergoes rigorous testing to ensure consistent efficacy and safety standards.
| Packing | Moisture-resistant sealed 25 kg bags containing conditioned glass-fiber-reinforced nylon 12 pellets, ensuring dry, contaminant-free delivery and stable processing. |
| Container Loading (20′ FCL) | A 20′ FCL container carrying EMS-Grivory Grilamid LVX-50H nat Nylon 12, 50% glass fiber filled, conditioned, packed on pallets and sealed for transport. |
| Shipping | This material is supplied as conditioned nylon granules in sealed, moisture-barrier packaging. It is non-hazardous and not regulated for transport. Ship in standard dry containers or trucks at ambient temperature, protecting from moisture, excessive heat, and prolonged sunlight to preserve quality. |
| Storage | Store Grilamid LVX-50H in its original, sealed container in a cool, dry, well-ventilated area. Keep away from direct sunlight, heat sources, and moisture to prevent degradation and water absorption. Maintain temperatures below 30°C and avoid contact with strong oxidizers. Ensure containers remain tightly closed when not in use. |
| Shelf Life | Store in original sealed packaging, cool and dry place. Protect from moisture and UV; shelf life indefinite. |
In automotive underhood quick-connector systems for evaporative emission lines and fuel vapour purge circuits, Grilamid LVX-50H nat is moulded where the PA12 base resin must retain 50 % glass-fibre reinforcement after conditioning at 23 °C and 50 % RH. The material is dried in a closed-loop desiccant dryer with a dew point below −40 °C until residual moisture drops below 0.10 % by ISO 15512, because the glass-filled PA12 melt is sensitive to hydrolytic chain scission above 280 °C. Injection is carried out with a three-zone screw of 20:1 to 25:1 L/D, a melt temperature profile from 255 °C to 280 °C, and a mould surface temperature between 50 °C and 80 °C; the upper mould temperature is favoured for crystallinity development in the sealing ribs. Weld-line placement in quick-connect bodies is shifted away from the O-ring groove and locking-lance flexure by using symmetrical gate placement or sequential valve gating, since the 50 % glass loading reduces weld strength more severely than lower fill ratios. Fuel-immersion qualification uses ASTM D471-16a with Fuel C and Fuel CE10 at 60 °C for 168 h; the acceptance criterion is retention of burst pressure and absence of stress cracking at the sealing surfaces. Dimensional interchange is checked against SAE J2044 quick-connector profiles where relevant, while leakage is screened by dry-air pressure-decay testing at 0.5 MPa. The terminal part is typically a PA12-GF50 quick-connect coupling body or filler-neck vapour fitting with an overmoulded elastomer seal interface; the natural colour permits downstream laser marking but requires batch-to-batch additive-free stabilisation.
In compressed-air directional control valve bodies and manifold blocks operated between 0.8 MPa and 1.6 MPa, Grilamid LVX-50H nat is injection-moulded as a mass-reduced alternative to die-cast aluminium where condensed water and aggressive compressor oil mist are present. The PA12 matrix absorbs approximately half the equilibrium moisture of a PA6-GF50 under the same atmosphere, which reduces bore distortion in spool-valve guide surfaces; material comparisons use ISO 62 and conditioning per ISO 291. The formulation is a natural short-glass fibre compound at 50 wt%, with no internal lubricant; therefore moving metal spools or poppets require either hard-anodised aluminium or stainless steel surfaces and external grease compatibility with PA12. Mould filling is configured with sequential valve-gated hot runners to push knit lines out of O-ring grooves, threaded port roots, and the 1.0 mm to 2.0 mm internal pilot galleries. Melt temperature is held between 255 °C and 275 °C, back pressure between 0.5 MPa and 1.0 MPa, and hold pressure at 60 % to 70 % of peak cavity pressure to minimise fibre-orientation-induced warpage across the port face. Cast-in brass threaded inserts are preheated to 120 °C and moulded with boss outside diameters at 2.0 to 2.5 times the insert diameter; torque retention is verified with a digital torque driver. The terminal component is a 5/2 valve manifold body or push-in fitting block; burst testing at 4.8 MPa hydraulic for 60 s serves as a 3:1 margin over the upper service pressure. Compressed-air purity compatibility is checked against ISO 8573-1 for oil aerosol and condensate classes, while dimensional stability under pressure cycling is monitored by air leakage decay below 1 kPa/min.
In electromechanical actuator gear trains for HVAC mixing dampers and seat adjustment drives, Grilamid LVX-50H nat is selected for sector gears, cam drums, and lever arms where the 50 % glass-fibre network restricts tooth deflection but also reduces ultimate strain to a range typical for heavily filled polyamides. The grade is used in natural colour to maintain reproducible melt rheology when external solid lubricants, such as PTFE-loaded silicone greases, are applied at assembly; no internal lubricant is present, so dry running against an acetal copolymer gear is limited to intermittent duty below 0.5 m/s pitch-line velocity and 5 MPa tooth contact pressure unless prototype data demonstrate otherwise. Moulding uses a two-stage injection profile with melt temperature 260 °C to 275 °C and mould surface temperature 60 °C to 80 °C; the gate is positioned at the thick hub and sized to maintain a shear rate below 50,000 s−1 to limit glass-fibre breakage. Pack pressure is held for a gate-seal time determined from cavity-pressure sensor curvature, typically with hold pressure at 65 % of peak cavity pressure. Gear tooth geometry follows VDI 2545 for plastic gears, and tooth root stress is compared with conditioned flexural fatigue data generated per ISO 178; because published fatigue data for this specific grade under two-pass meshing are limited, design release requires in-house staircase testing. The terminal component is a sector gear or cam drum in an automotive HVAC actuator or seat recline mechanism; dimensional checks after thermal cycling from −40 °C to 85 °C confirm that PA12-grade shrinkage and moisture conditioning do not shift centre distance beyond the gear backlash allowance.
For outdoor telecommunication enclosure frames and photovoltaic combiner-box structural rails, the replacement of PA6-GF50 with Grilamid LVX-50H nat is driven by lower conditioned moisture uptake and reduced post-moulding dimensional shift. The 50 wt% glass loading creates a high creep modulus at continuous dry heat; bolted joint clamp-load retention is screened according to ISO 899-1 with tensile creep at 50 °C and an imposed stress typically below 10 MPa for unfilled structural sections. The unpigmented natural grade, however, must be protected from direct ultraviolet radiation; continuous outdoor exposure without UV stabilisation causes surface chalking and gloss loss under ISO 4892-2 cycled xenon-arc testing. The material's flame class for natural PA12-GF50 is commonly UL 94 HB; if an enclosure standard demands V-0, the specific formulation must be re-qualified because halogen-free flame-retardant packages shift impact and weld strength. Moulding uses wall thicknesses of 2.5 mm to 3.5 mm, rib thickness not exceeding 0.7 times the nominal wall, and draft angles of 0.5 ° to 1.0 ° on frame ribs. Brass heat-stake or threaded inserts are inserted with a boss outside diameter of 2.0 to 2.5 times the insert outer diameter, and torque retention is checked after 1,000 h at 50 °C. The terminal component is a polyamide frame rail or DIN-rail mounting bracket for IP-rated outdoor enclosures; sealing geometry is qualified to IEC 60529 for dust and water ingress, while creep across bolted surfaces is verified by gap growth below 0.5 mm after 1,000 h under 10 MPa.
In structural inserts for alpine ski binding toe pieces and bicycle clipless pedal bodies, Grilamid LVX-50H nat is moulded because the conditioned PA12 matrix retains sub-zero impact behaviour more consistently than heavily filled PA66 alternatives. The terminal components are overmoulded aluminium or stainless steel retention plates, binding base plates, and pedal cleat housings where the glass-fibre network supplies bending stiffness. Insert overmoulding uses preheating of metallic anchors to 120 °C to 150 °C, melt temperature 260 °C to 275 °C, and mould surface temperature 60 °C to 80 °C to reduce locked-in radial stress. The gate is placed at the thickest wall and the melt front is sequenced so that knit lines do not intersect cleat retention hooks or binding release interfaces; because the material is unpigmented, laser-etched part identification is post-processed without compromising surface integrity. Impact verification is done by ISO 179-1/1eA notched Charpy impact at −30 °C, while flexural modulus and flexural stress at break are compared after conditioning per ISO 291 using ISO 178. In the ski binding component, the polymer part is not used as the primary release-critical member; full release-torque verification remains with the metal spring assembly tested under the applicable ski binding standard. The 50 % glass loading restricts elongation at break, so snap-fit geometry is replaced by bolted or insert-based retention. In bicycle pedal bodies, traction pins are threaded into moulded bosses or heat-staked after moulding rather than enforced by snap-fits. Field-batch consistency is monitored by dry-as-moulded and conditioned Charpy values; shifts above 10 % within the same cavity indicate fibre-orientation drift caused by screw wear or back-pressure fluctuation.
For cable cleats, conduit clamps, and cable entry frames in offshore wind transition pieces and shipboard cable trays, Grilamid LVX-50H nat is selected to limit swell under humidity cycling. The conditioned PA12 matrix absorbs roughly half the water mass of PA6-GF50 at equivalent relative humidity, which reduces dimensional opening in multi-part clamp bodies that must maintain cable spacing under short-circuit electromagnetic loading. Moulding is performed in multi-cavity tools with valve-gated hot runners; the hot runner manifold is held at 280 °C while the nozzle temperature is set to 270 °C to 280 °C. The natural grade is pre-dried to below 0.10 % residual moisture using a dew point lower than −40 °C; failure to dry results in silver streaks on the surface near the gate and partially hydrolysed weld lines. Structural design uses wall thicknesses of 3.0 mm to 5.0 mm, with stiffening ribs at 0.5 to 0.7 times the nominal wall and an outer boss diameter of 2.0 to 2.5 times the thread insert diameter. Salt spray resistance of the metallic inserts and adjacent polymer is assessed by cyclic salt fog per IEC 60068-2-52 severity 4; the polymer itself is not a corrosion site, but the interface between glass fibres and PA12 matrix can wick moisture if the surface skin is breached by improper gate geometry. The unpigmented grade must be overmoulded with a UV-stabilised skin, coated, or assigned to locations shielded from direct sunlight; without UV protection, surface chalking under ISO 4892-2 becomes visible after extended xenon exposure. Terminal parts include two-bolt cable cleat bodies, clamp shells, and entry frame segments; torque retention is verified after 500 h at 70 °C and 85 % RH using ISO 17025-calibrated torque drivers.
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EMS-Grivory Grilamid LVX-50H nat is a heat-stabilized, 50% glass-fiber-reinforced polyamide 12 injection-moulding compound supplied in natural, self-coloured pellet form. The grade designation LVX-50H identifies the base resin, the glass loading, and the heat-stabilization package; nat indicates an uncoloured natural grade. In published mechanical-property tables, the term “conditioned” refers to specimens equilibrated in the standard atmosphere of 23 °C and 50% relative humidity according to ISO 291:2008, or accelerated conditioning according to ISO 1110:2019. Conditioned data represent the moisture-plasticised state found in normal polyamide service and are commonly used for deflection, snap-fit retention, and creep-sensitive calculations, whereas dry-as-moulded values are used for initial assembly and weld-line strength checks.
The glass reinforcement is not a passive filler; a 50% glass-fiber mass fraction corresponds to roughly 28 vol% glass when calculated from a glass density of 2.54 g/cm³ and a polyamide 12 matrix density of 1.01 g/cm³. This volumetric relationship controls stiffness, creep resistance, and the anisotropy of mould shrinkage. In the conditioned state, moisture is absorbed only by the polyamide 12 phase, while the glass phase remains effectively dry. Consequently, composite-level moisture uptake at 50% relative humidity is lower than that of an unfilled polyamide 12 grade. Under ISO 62:2008 exposure, the polyamide 12 matrix is known to absorb less equilibrium moisture than PA6 or PA66 at the same relative humidity; published data for this specific configuration is limited, and lot-specific water-absorption curves should be obtained when sealing performance or electrical clearance is critical.
Moisture-related dimensional change is governed by the coefficient of hygroscopic expansion and the local fiber-orientation state. Thickness-direction expansion after conditioning is normally lower than for PA6-based compounds because equilibrium moisture uptake is lower and glass restraint is high, but the shape change is anisotropic. Rapidly cooled surfaces may retain frozen molecular orientation and lower local moisture diffusivity, while the core may absorb moisture first near gate locations. In flat parts below 2 mm thickness, differential conditioning can produce transient bow until through-thickness equilibrium is reached; diffusion timescale with thickness squared, and full through-thickness sorption at 23 °C/50% relative humidity may require well over 100 h depending on wall stock and glass orientation.
Linear mould shrinkage in a 50% glass-filled polyamide 12 is anisotropic because glass fibers align along the direction of melt-front advance and shear flow. Flow-direction shrinkage is restrained by fiber length and orientation, while cross-flow shrinkage remains higher. Mold-filling simulation should therefore use measured fiber-orientation tensors rather than generic isotropic shrinkage values; otherwise, post-mould tolerances can be missed on housing covers and flat connector bodies. Gate location, weld-line placement, and wall-thickness transitions control the skin-core orientation through the part. Fast injection rates produce a highly oriented skin with low flow-direction shrinkage, but the same condition can increase frozen-in stress and warpage after conditioning.
On production-scale injection-moulding machines, the high glass content makes the material sensitive to screw-recovery conditions. A metered screw with a compression ratio of 2.0:1 to 2.5:1, an L/D of 18:1 to 22:1, and a wear-resistant bimetallic barrel is preferred. Excessive back pressure above 5 MPa increases fiber breakage and reduces modulus retention; back pressure below 2 MPa may cause poor dispersion and unmelted granules. The non-return valve should be inspected for glass-fiber scoring at regular intervals because a worn valve causes shot-weight drift and inconsistent packing. A screw decompression of 3–5 mm after recovery reduces drool on open nozzles, but excessive decompression introduces air and can produce gas-burn marks. Shot size should remain between 40% and 70% of barrel capacity to control residence time; total residence time at melt temperature should not exceed 8 min, with shorter hold-up required near the upper melt-temperature limit.
Pre-drying in a desiccant dryer is mandatory. Residual moisture above 0.10% by mass, determined by ISO 15512:2019, causes surface splay, hydrolysis, fluctuating melt viscosity at the nozzle, and reduced weld-line strength. Drying at 80 °C for 4–8 h with a dew point below -30 °C is typical for PA12-GF50 compounds. Granules exposed to ambient air should be re-dried after 24 h. Barrel temperature settings from rear to nozzle are commonly 230 °C, 250 °C, 260 °C, 270 °C, and 280 °C, but the exact profile must follow the current EMS-Grivory technical data sheet. Melt temperature above 300 °C should be avoided because thermal degradation of the polyamide 12 backbone produces volatile by-products and reduces mechanical performance. Mold temperature is normally maintained between 80 °C and 110 °C; higher mould temperature improves weld-line strength and reduces post-mould warpage, but it may extend cycle time and increase post-mould crystallization shrinkage.
Mould venting requires close attention because glass fines accumulate at the parting line and clog shallow vents. Vent depths of 0.02–0.05 mm are typical for glass-filled polyamide, and vents should be checked after 5,000–10,000 shots in continuous production. Weld lines formed downstream of core pins can retain 60–80% of the unfilled tensile strength at 23 °C when the melt-front convergence angle is above 135° and mould temperature is held above 80 °C. Sequential valve-gate control or a heated sprue bushing reduces cold-slug formation and improves gate-area flatness in large flat parts. These processing boundaries are tool-specific and should be validated on the production mould because local pressure drop, fiber orientation, and gate size dominate part consistency.
Representative short-term mechanical values reported for the natural/heat-stabilized grade are summarised below. These are typical datasheet values, not specification minima, and production-lot testing takes precedence for acceptance decisions.
| Property | Test standard | Dry as moulded | Conditioned |
|---|---|---|---|
| Density | ISO 1183-1:2019 | 1.44 g/cm³ | 1.44 g/cm³ |
| Tensile modulus | ISO 527-1/-2:2012 | 15,000 MPa | 13,000 MPa |
| Tensile strength at break | ISO 527-1/-2:2012 | 185 MPa | 155 MPa |
| Elongation at break | ISO 527-1/-2:2012 | 2.5% | 3.0% |
| Flexural modulus | ISO 178:2019 | 14,500 MPa | 12,500 MPa |
| Charpy notched impact, 23 °C | ISO 179-1/1eA:2023 | 18 kJ/m² | 20 kJ/m² |
| Heat distortion temperature, 1.8 MPa | ISO 75-2:2013 | 165 °C | 160 °C |
| Melting temperature | ISO 11357-1/-3:2018 | 178 °C | 178 °C |
The dry values are used for initial assembly, buckling checks, and short-term overload conditions; conditioned values are used for long-term deflection, snap-fit retention, and creep calculations in humid service. The reduction in tensile modulus between dry and conditioned states is limited because the polyamide 12 matrix takes up comparatively little moisture at service humidity. The conditioned modulus remains above 12 GPa, which is high for a polyamide and supports load-bearing structural-housing designs. Nevertheless, the material remains a semicrystalline thermoplastic; creep, stress relaxation, and fatigue must still be evaluated for elevated-temperature service. Dynamic load applications require fatigue testing according to ISO 13003:2003 or the applicable component-level standard, and published data for this specific configuration is limited for high-cycle fatigue under hot humid conditions.
Potential application fields include pneumatic valve bodies, fuel-system clips, cable glands, gear-housing covers, pump components, and structural brackets. The chemical structure of polyamide 12 provides resistance to aliphatic hydrocarbons, mineral oils, greases, diluted alkalis, and many automotive fluids; chemical-resistance screening per ISO 175:2010 should be performed with the actual fluid formulation and service temperature. Compared with PA66-GF50, this material offers lower composite density, lower equilibrium water absorption, better retention of dry modulus after conditioning, and superior resistance to zinc chloride solutions and many automotive coolants. The trade-off is lower short-term heat resistance than PA66-GF50 and lower surface hardness than some aromatic polyamides. Against 30% glass-filled PA12, the grade provides higher stiffness and lower creep strain but lower impact ductility and more pronounced anisotropic shrinkage. Against carbon-fiber-reinforced polyamide 12, it is electrically non-conductive and lower in cost while offering lower modulus and higher abrasion; against mineral-filled grades, it gives a higher strength-to-density ratio but rougher surface finish and greater tool wear.
For fluid-handling components such as compressed-air fittings, fuel-rail clips, and quick connectors, the low moisture uptake reduces seal-wear and thread-torque relaxation after repeated dry-wet cycles. In gear housings and pump bodies, the high glass content raises modulus and reduces creep under intermittent loading, but the grade requires larger draft angles, typically 1–2° for textured surfaces and 0.5–1° for polished ribs, than unfilled PA12. For snap-fit arms, design should use the conditioned modulus rather than the dry modulus to avoid under-estimating deflection at 50% relative humidity. The material should be tested under the actual service fluid at the highest expected temperature using ISO 175:2010 exposure followed by tensile or impact testing; published data for this specific configuration is limited for brake fluids, biodiesel, and hot windshield-washer formulations.
The grade is not a flame-retardant compound; wall thicknesses above 1.5 mm may be classified as HB under UL 94:2023, but classification must be confirmed on the actual part and color. For electrical applications, comparative tracking index and dielectric strength values should be obtained from the supplier’s current data sheet, because values depend on specimen thickness and conditioning state. The natural grade is not inherently UV-stabilized for outdoor exposure, and compounded color or protective coating may alter surface gloss, shrinkage, and laser-marking contrast. Components exposed to hot water above 95 °C, strong acids, or oxidizing media should not be specified without long-term testing. Food-contact, potable-water, and medical-grade suitability require explicit supplier certification; compliance with EU 10/2011, FDA 21 CFR 177.1500, or ISO 10993 series is product-specific and not implied by the base designation.
For materials specification, the full designation EMS-Grivory Grilamid LVX-50H nat should be written on the part drawing along with the required test standards and conditioning state. Lot-to-lot variation in glass content, moisture, and molecular weight is controlled under the supplier’s quality system, but regulatory compliance under REACH and RoHS must be confirmed using the current safety data sheet and product declaration. Material substitution should not be based only on nominal glass loading; equivalent 50% glass-filled PA12 grades from other producers may differ in glass sizing, stabilizer package, viscosity, and mould shrinkage, even when nominal density and tensile modulus appear similar.
