| HS Code | 720574 |
| Material | EMS-Grivory Grilamid LVX-65H SST nat Nylon 12, 50% Glass Fiber Filled, Conditioned |
| Density | 1.55 g/cm³ |
| Tensile Modulus | 12500 MPa |
| Tensile Strength | 175 MPa |
| Elongation At Break | 3.5% |
| Flexural Modulus | 11500 MPa |
| Flexural Strength | 250 MPa |
| Charpy Notched Impact Strength | 12 kJ/m² |
| Heat Deflection Temperature Hdt A 1 8 Mpa | 170 °C |
| Melting Temperature | 178 °C |
| Water Absorption 24h | 0.5% |
As an accredited EMS-Grivory Grilamid LVX-65H SST 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 | Supplied in sealed, moisture-protected 25 kg bags, conditioned and ready for processing. Quantity: 25 kg. |
| Container Loading (20′ FCL) | One 20′ FCL container, loaded with palletized, moisture-protected bags of Grilamid LVX-65H SST, ensuring safe, contamination-free transport. |
| Shipping | Shipped in sealed, moisture-proof bags to protect the hygroscopic nylon 12 resin. Handled carefully to prevent bag damage and moisture absorption. Typically transported via standard ground freight on pallets, avoiding extreme heat or humidity. Ensure dry storage at moderate temperature before processing. Non-hazardous material under normal shipping conditions. |
| Storage | Store Grilamid LVX-65H SST nat in its original, unopened packaging in a cool, dry area below 30°C. Keep away from direct sunlight, heat sources, and moisture to prevent water absorption. Reseal promptly after use; if exposure occurs, dry pellets before processing to maintain performance. |
| Shelf Life | Shelf life is indefinite when stored in original sealed packaging, in a cool, dry place away from direct sunlight. |
In gasoline direct-injection and flex-fuel delivery systems, EMS-Grivory Grilamid LVX-65H SST nat Nylon 12, 50 wt% glass fibre filled and conditioned, is processed into fuel sender flanges and quick-connect couplings that must retain connector extraction force after 1,000 h exposure to CE10/CE85 at 60°C. The primary compliance set for this sector includes SAE J2044 for quick-connector insertion and retention, SAE J2260 for low-permeation non-metallic fuel lines, SAE J1737 for hydrocarbon permeation testing, and evaporative emission limits under US EPA and CARB LEV III. The use proportion is fixed at 100 wt% as-supplied conditioned compound without downstream let-down; regrind from hot-runner drops and sprues is not allowed above 20 wt% because repeated high-shear history shortens the glass fibre length distribution and increases leak-path risk in sealing ribs. Moulding on a 250 t clamp injection machine with a 40 mm screw uses melt temperature 255–275°C, mould temperature 85–95°C, desiccant pre-drying at 80°C for 4–6 h to residual moisture ≤0.08 wt%, and holding pressure at 60% of peak injection pressure for 5 s. Terminal parts include fuel pump module flanges, EVAP canister brackets, filler-neck flanges, and quick-connector retainers.
Coolant distribution manifolds in battery-electric vehicle thermal management circuits impose a different failure mode: internal pressure pulses from electric coolant pumps ranging from 0.2 bar to 1.5 bar at 85°C in a 50/50 ethylene glycol–deionised water mixture. The 50 wt% glass fibre creates flow-induced orientation; at core-pin weld lines, parent wall tensile strength can drop to 50–70%, so gate location must be arranged to move weld lines outside pressure-holding walls or the burst design factor is raised to 2.5× maximum operating pressure. The PA12 matrix exhibits lower water uptake—approximately 0.7 wt% at 23°C/50% RH—than PA6 or PA66, which limits dimensional growth in humid engine-bay conditions. Relevant standards are ISO 175 for chemical resistance in 50/50 glycol-water at 85°C, ISO 188 for hot air ageing at 120°C, and ISO 22088-3 for environmental stress cracking on bent specimens. Operational boundary: coolant additive packages with pH above 9.5 or amine-based corrosion inhibitors require validation because strongly alkaline aqueous media accelerate polyamide hydrolysis. The addition ratio is 100 wt% virgin conditioned compound; regrind from runner systems is capped at 10 wt% and only after customer-specific pressure-cycle burst tests. Production is performed with melt temperature 260–280°C, mould temperature 80–100°C, screw rotation 60–120 min⁻¹ on a 40 mm screw, and specific clamping force above 0.8 kN/cm²; pre-drying at 80°C in a desiccant dryer with 1.5 m³/h air flow per kg/h throughput is required to residual moisture ≤0.08 wt%. Finished products include coolant manifolds, degassing reservoirs, coolant pump cover plates, and battery chiller port connectors.
Compressed-air valve bodies in food and pharmaceutical pneumatic control circuits experience continuous dew-point cycling, weak acidic condensate, and impact loading from solenoid pilot valves. The selection of conditioned 50 wt% glass-filled PA12 over PA6 or PA66 is driven by equilibrium moisture uptake near 0.7 wt% at 23°C/50% RH, compared with approximately 2.5 wt% for PA66; the lower uptake reduces dimensional growth and retains more consistent Charpy impact after 1,000 h humid ageing. Compliance includes ISO 8573-1:2010 for compressed air purity classes, ISO 294-1 for moulding shrinkage test specimen preparation, and ISO 179-1/1eU for notched impact energy after conditioning. The use proportion for non-load-bearing housings allows 25 wt% regrind maximum; solenoid valve body sections exposed to rated pneumatic pressure are moulded from 100 wt% virgin compound because regrind shifts glass fibre length distribution and lowers pressure-holding weld-line strength. Process conditions are melt temperature 250–270°C, mould temperature 80°C, and back pressure 2–4 bar; the screw and barrel must be nitrided or bimetallic to resist glass-fibre abrasive wear, with barrel wear indicated by increasing melt pressure drop at constant screw recovery time. Terminal parts include pneumatic valve bodies, pressure regulator caps, filter bowls, and solenoid enclosures.
Release torque calibration on alpine and touring bindings is performed after moisture conditioning to 23°C/50% RH, because the conditioned designation of this grade reflects ISO 1110 accelerated moisture absorption. The baseplate must not creep under spring preload during 48 h at 60°C and 80% RH; PA12’s lower water uptake reduces the dry-to-conditioned modulus shift found in PA66, but injection gate location must be selected to minimise glass fibre orientation at screw bosses and release-spring pockets. Relevant compliance standards are ISO 5355:2019 for alpine ski boot-binding interface geometry, ISO 13992:2018 for touring binding release testing, and UIAA 153 for crampon attachment point load capacity. Safety-critical release components are moulded from 100 wt% virgin conditioned compound; non-releasable covers may include 15 wt% regrind only if Charpy impact per ISO 179-1/1eU remains above the specified release torque deviation threshold. The production process uses mould temperature 100°C to form a resin-rich surface layer, gate thickness ≥1.5 mm, melt temperature 260–280°C, and desiccant pre-drying at 80°C for 6 h to residual moisture ≤0.08 wt%. Terminal parts include ski binding base plates, heel tracks, crampon lever arms, and snowshoe binding structural rails.
For industrial water pumps handling suspended abrasive solids, bronze wear rings are replaced by injection-moulded 50 wt% glass-filled PA12 because the polyamide does not gall against stainless steel impeller skirts and provides lower seizure risk after loss of lubrication. Published tribological data for this specific conditioned glass-filled PA12 in abrasive water is limited; end users must validate wear factor against actual slurry particle size distribution and flow velocity rather than relying on dry-metal wear coefficients. The compliance set for industrial water contact includes ISO 175 for immersion in water at 60°C, ISO 62 for water absorption, and RoHS Directive 2011/65/EU with REACH SVHC reporting. Addition ratio is up to 20 wt% regrind if injection-moulded density remains within 1.43–1.47 g/cm³; above 0.10 wt% moisture before moulding, hydrolysis lowers molecular weight and shortens pump wear-ring service life. Thick-wall sections of 4.0–6.0 mm require screw speed 40–80 rpm, back pressure 2–4 bar, melt temperature 255–275°C, and mould temperature 90°C; post-moulding conditioning at 23°C/50% RH for two weeks is required to stabilise dimensions before final machining. Terminal parts include rotodynamic pump wear rings, impeller hubs, volute liners, and mechanical seal housings.
Outdoor telecommunication enclosure hinges and latch levers moulded from conditioned 50 wt% glass-filled PA12 must retain spring force after 40°C/93% RH damp-heat exposure for 10 days per IEC 60068-2-30 without visible glass-fibre bloom or loss of snap-fit engagement. The natural grade is processed as a ready-to-mould compound; colour masterbatch addition, if used, is limited to 2 wt% and requires pre-drying to prevent glass/matrix debonding at the gate area. Relevant standards include UL 94 classification at 1.6 mm, glow-wire testing per IEC 60695-2-11, and IEC 60068-2-30 damp-heat cyclic exposure. Processing conditions are melt temperature 260–280°C, mould temperature 90°C, wall thickness 1.2–2.0 mm, and high injection velocity to minimise fibre-rich surface layers; pre-drying at 80°C for 4–6 h to residual moisture ≤0.08 wt% is mandatory because thin-wall filling requires higher melt temperature. Terminal parts include outdoor cabinet hinge bodies, latch arms, antenna bracket insulators, and cable gland locknuts.
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EMS-Grivory Grilamid LVX-65H SST nat is a polyamide 12 (PA 12) injection-moulding compound reinforced with 50 wt% glass fibre. The suffix nat designates natural, unpigmented granules. The grade is heat-stabilized and toughened. Unless otherwise specified, “conditioned” denotes specimens equilibrated at 23 °C and 50 % RH according to ISO 291. At equilibrium under ISO 291, the PA12 matrix retains approximately 0.5–0.7 wt% moisture, depending on wall thickness and fibre distribution. This moisture uptake plasticizes the matrix and raises notched impact response, while the 50 wt% glass network limits absolute dimensional change.
Conditioned tensile modulus measured under ISO 527-1/-2 typically falls to 12,500–13,500 MPa, from 14,500–15,500 MPa dry-as-moulded. Tensile strength at break decreases from approximately 190–210 MPa dry to 165–180 MPa conditioned. Elongation at break remains below 5 % in both states because the reinforcement dominates the deformation response; typical values are 2.5–3.5 % dry and 3.5–4.5 % conditioned. The Charpy notched impact at 23 °C under ISO 179/1eA increases to 18–25 kJ/m² after conditioning, compared with 15–18 kJ/m² dry-as-moulded. The shift reflects plasticization of the PA12 matrix, not weakening of the fibre–matrix interface, and it must be accounted for in impact and fatigue calculations.
| Property | Test standard | Dry-as-moulded | Conditioned ISO 291 |
|---|---|---|---|
| Density | ISO 1183-1 | 1.44–1.45 g/cm³ | |
| Water absorption at saturation, 23 °C | ISO 62 | 0.6–0.8 wt% | |
| Tensile modulus | ISO 527-1/-2 | 14,500–15,500 MPa | 12,500–13,500 MPa |
| Tensile strength at break | ISO 527-1/-2 | 190–210 MPa | 165–180 MPa |
| Elongation at break | ISO 527-1/-2 | 2.5–3.5 % | 3.5–4.5 % |
| Charpy notched impact, 23 °C | ISO 179/1eA | 15–18 kJ/m² | 18–25 kJ/m² |
| Heat deflection temperature, 1.8 MPa | ISO 75-1/-2 | 170–175 °C | 165–172 °C |
| Melting point | ISO 11357-3 | 177–179 °C | |
Thermal and dimensional data differ by orientation and moisture state. The crystalline melting point determined by ISO 11357-3 is approximately 178 °C. Under ISO 75-1/-2, heat deflection temperature at 1.8 MPa is approximately 170–175 °C for dry specimens and 165–172 °C after conditioning. The linear coefficient of thermal expansion measured by ISO 11359-1/-2 is anisotropic: approximately 20–30 × 10⁻⁶ K⁻¹ in the flow direction and 70–90 × 10⁻⁶ K⁻¹ transverse. This anisotropy, together with mould shrinkage under ISO 294-4, requires gate placement that avoids warpage in flat or cylindrical parts. Melt volume-flow rate at 235 °C/5 kg under ISO 1133-1 is commonly 8–15 cm³/10 min for 50 wt% glass-filled PA12; the value should be used for batch-to-batch checking rather than mould-filling simulation because fibre orientation creates deviations from capillary measurements.
The increase from PA12 GF30 to 50 wt% glass fibre raises the fibre volume fraction to roughly 0.30–0.32 and changes failure behaviour. Tensile stiffness rises, but elongation at break remains below 5 %; the material is therefore notch-sensitive in tensile loading despite its toughened matrix. Weld lines generated by flow-front convergence contain fewer load-bearing glass fibres across the knit plane. Published studies on short-glass polyamides report weld-line tensile strength retention of 40–60 % relative to unwelded material at 50 wt% loading when tested under ISO 527-1/-2; specific published data for Grilamid LVX-65H SST nat in this configuration is limited, and end-use specimens should be tested across the weld line.
Relative to PA12 GF30, the 50 wt% compound raises density by approximately 0.20 g/cm³ and raises heat deflection temperature because the fibre network constrains creep. Mould temperature becomes more critical: at below 80 °C, exposed fibre at the surface and weak knit lines are more likely; 80–100 °C mould temperature improves surface homogeneity and knit-line strength. Against PA66 GF50, the PA12 grade has lower saturated moisture uptake under ISO 62, often about one-quarter to one-fifth of the short-chain high-amide material, which reduces humidity-induced modulus loss. However, its ISO 75-1/-2 heat deflection temperature at 1.8 MPa is approximately 170–175 °C, compared with 245–250 °C for heat-stabilized PA66 GF50. Against PPA GF50, the PA12 grade processes at melt temperatures 80–100 °C lower and exhibits lower density, 1.44–1.45 g/cm³ measured under ISO 1183-1, compared with 1.55–1.65 g/cm³ for many PPA GF50 grades; however, PPA retains higher HDT/A and lower creep under hot load. Selection therefore turns on whether the application is moisture- or chemically limited, or thermally limited.
Pre-drying is required at 80–100 °C for 4–8 h in a desiccant dryer to residual moisture below 0.10 wt%; maintain a dew point below −30 °C and use closed material handling at ambient relative humidity above 60 % RH to avoid rapid moisture regain. Melt temperature measured by infrared pyrometer should be held at 230–270 °C; the preferred range is 240–260 °C. At 270 °C, total barrel residence time should not exceed 3 min; at 250 °C, residence time may be extended to 5 min before visible yellowing and fibre–matrix debonding become significant. For a 35 mm diameter screw, screw speed above 100 min⁻¹ reduces mean glass-fibre length and lowers Charpy notched impact under ISO 179/1eA.
Back pressure is set at 3–7 MPa hydraulic, sufficient to homogenize the melt without excessive shear heating. Injection speed is set at 100–200 mm/s for wall thicknesses of 3 mm or greater; thinner sections may require higher speeds but increase gate blush and orientation gradients. Hold pressure is typically 60–80 % of peak observed injection pressure; hold time should be derived from gate-seal studies using cavity pressure transducers, commonly 2–4 s/mm of wall thickness. Undried material generates splay and silver streaks; melt temperature above 270 °C produces nozzle drool, polymer degradation, and free glass at the gate. Avoid blending PA12 with PA6 or PA66 regrind because their differing melting temperatures and moisture uptake create heterogeneous shrinkage and weld-line defects.
| Processing parameter | Recommended window | Measurement basis |
|---|---|---|
| Pre-drying | 80–100 °C, 4–8 h | Residual moisture ≤ 0.10 wt% |
| Melt temperature | 230–270 °C | Preferred 240–260 °C; optical pyrometer |
| Mould temperature | 80–100 °C | Surface homogeneity and dimensional stability |
| Screw L/D ratio | 18:1–22:1 | Compression ratio 2.0:1–2.5:1 |
| Back pressure | 3–7 MPa | Hydraulic pressure, 35 mm screw |
| Injection speed | 100–200 mm/s | Wall thickness ≥ 3 mm |
| Hold pressure | 60–80 % of peak injection pressure | Gate-seal time 2–4 s/mm |
| Residence time | ≤ 5 min at 250 °C; ≤ 3 min at 270 °C | Prevents yellowing and impact loss |
Tooling for 50 wt% glass-fibre PA12 requires abrasion-resistant steel inserts in high-wear gates and runners. Full-round or trapezoidal runners are preferred; cold-runner diameters below 3 mm freeze prematurely. Gates of 1.5–2.5 mm width with land lengths below 1.0 mm reduce shear heating and fibre breakage. Venting depth along the parting line is typically 0.01–0.02 mm for 50 wt% glass-filled PA12; insufficient venting causes gas-burn marks at flow-front convergence. Mould shrinkage under ISO 294-4 is anisotropic, with indicative values of 0.10–0.20 % longitudinal and 0.30–0.45 % transverse for a 2 mm plaque; actual shrinkage scales with gate design, wall thickness, and mould temperature.
PA12 offers lower equilibrium moisture uptake than PA66 and PA6. At saturation in 23 °C water under ISO 62, a 50 wt% glass-filled PA12 typically reaches 0.6–0.8 wt% moisture, whereas short-chain high-amide polyamides often exceed 3–4 wt%. The lower amide density also improves resistance to hot water and glycol mixtures at moderate temperature. Continuous exposure to 50:50 aqueous ethylene glycol above 120 °C can hydrolyse the PA12 backbone and reduce tensile strength; published multi-year data for this specific compound under pressurized water/glycol at 130 °C are limited. Qualification should use ISO 1817 immersion followed by ISO 527-1/-2 tensile testing at end-use heat-aging times.
Zinc chloride stress-cracking is a known failure mode for PA66 in automotive underbody clips; PA12 grades generally show higher resistance but not immunity. For comparative screening, ISO 22088-3 bent-strip testing in 50 wt% aqueous zinc chloride at 23 °C can be used, with crack inspection at 24 h, 48 h, 168 h, and 500 h. Sulfuric acid, formic acid, phenol, and halogenated solvents may attack PA12 and should be excluded unless end-use testing demonstrates fitness. The natural-grade formulation should not be assumed compliant with EU 10/2011, FDA 21 CFR, or NSF/ANSI 61; written supplier confirmation is required for food-contact, potable-water, or medical applications. For electrical and electronic uses, RoHS 2011/65/EU compliance should be verified by lot-specific analytical data for heavy metals, PBB, and PBDE; the supplier’s REACH statement for the compounded pellet should be requested.
Applications for Grilamid LVX-65H SST nat are concentrated where PA12 chemical resistance, low moisture uptake, and 50 wt% glass stiffness are required together: compressed-air and fuel-system fittings, pneumatic connectors, cable clamps in oil-and-gas equipment, industrial filter housings, and structural sensor mounts. On a 130 t hydraulic clamp injection moulding machine using a 35 mm diameter screw and a cold-runner valve gate, gate diameter below 1.5 mm has been associated with premature gate freeze and elevated weld-line sensitivity; this is consistent with the compound’s fast skin formation and high fibre content. Where service temperatures exceed the 170–175 °C HDT/A of the grade under sustained load, particularly in engine-bay locations, alternative high-temperature polyamides should be evaluated.
