| HS Code | 276463 |
| Density | 1.51 g/cm³ |
| Glass Fiber Content | 50% |
| Tensile Strength At Break Conditioned | 150 MPa |
| Tensile Elongation At Break Conditioned | 3.0 % |
| Tensile Modulus Conditioned | 11000 MPa |
| Flexural Modulus Conditioned | 9500 MPa |
| Flexural Strength Conditioned | 200 MPa |
| Charpy Impact Notched 23c Conditioned | 13 kJ/m² |
| Melting Temperature | 178 °C |
| Heat Deflection Temperature 1 8 Mpa | 170 °C |
| Water Absorption 24h | 0.5 % |
| Water Absorption At Saturation | 1.5 % |
As an accredited EMS-Grivory Grilamid LBV-50H FWA 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 25 kg sealed, moisture-proof polyethylene bags, palletized and stretch-wrapped for safe transport and storage. |
| Container Loading (20′ FCL) | 20′ FCL loading: palletized bags of Grilamid LBV-50H nylon 12, 50% glass-filled, conditioned, secured and protected for safe transit. |
| Shipping | Ship as non-hazardous nylon resin pellets in sealed, moisture-proof bags or drums. Protect from humidity and direct sunlight. Store in a cool, dry area. Standard ground or ocean freight is suitable. No special transport permits required. Ensure containers are properly labeled and secured to prevent damage during transit. |
| Storage | Store in original, sealed packaging in a cool, dry, well-ventilated area, away from direct sunlight and heat sources. Keep container tightly closed to prevent moisture absorption, which can affect performance. Avoid exposure to excessive humidity or condensation. No special hazardous storage requirements, but ensure area is clean and protected from physical damage. |
| Shelf Life | Shelf life is typically 2 years when stored unopened, cool, dry, and protected from light and moisture. |
In municipal drinking-water distribution systems, brass and copper alloy meter chambers are increasingly replaced by 50 wt% glass-filled polyamide 12 when metrological stability, lead-free compliance, and resistance to dezincification corrosion are specified simultaneously. EMS-Grivory Grilamid LBV-50H FWA nat, conditioned at 23 °C and 50% relative humidity according to ISO 291:2008, provides a glass content fixed at 50% by mass without requiring downstream fiber addition; any processor-applied masterbatch or external lubricant must be listed in the supplier’s drinking-water positive list because the natural uncoloured formulation is central to the FWA certification profile. Regrind rates in this sector are held at or below 15 wt% only when the regrind fraction is generated from the same natural grade and processed under documented drying conditions at 80 °C for 4 h to a residual moisture level below 0.06 wt%. Higher fibre breakage in recycled material shifts the fibre length distribution and increases the risk of surface porosity that can harbour biofilm under stagnant water conditions. Production is typically performed on injection-moulding machines with 40–60 mm three-zone screws, check-ring non-return valves with hardened surfaces, and mould temperatures maintained at 80–100 °C to form a resin-rich outer layer that protects glass fibres from direct water exposure. The downstream process uses multiple sequential gate locations around circular meter chambers, and the weld line is positioned away from pressure-bearing sealing faces by mould-filling simulation; sink marks at brass insert bosses are controlled by holding pressures of 60–80 MPa and packing time derived from gate seal time. Terminal parts produced in this segment include positive-displacement water meter chambers, pressure-regulating valve bodies, backflow-preventer housings, and inspection-window nuts where dimensional stability after wet conditioning is a pass/fail issue. Compliance is assessed under the EU Drinking Water Directive 2020/2184, national approvals such as UBA KTW-BWGL and DVGW W270 for microbial growth, NSF/ANSI/CAN 61 in North America, and AS/NZS 4020 where documented extraction water is specified.
Where engine-bay temperatures above 120 °C are not continuous, the 50 wt% glass-filled polyamide 12 is inserted into fuel line bracket, clip, and quick-connect applications where PPA and PPS become dimensionally stable but too brittle in snap-fit retention after hot-oil conditioning. The material enters fuel contact discussion with a glass addition fixed at 50 wt%; the compound is not diluted with unfilled PA12 because lowering glass content below 45 wt% changes shrinkage anisotropy and increases ethanol-induced dimensional movement. The fuel vapor chain uses ISO 175:2010 immersion testing in Fuel C, ASTM D543-20 reference fuel blends, and SAE J2044 for quick-connect interchangeability; compliance is not a single part listing but a tiered set of OEM fluid-ageing and evaporative emission tests because the FWA natural grade is not usually the principal permeation wall in the system. Injection moulding of these components uses high-pressure 80–120 MPa fill, 250–280 °C melt temperature, and mould temperature of 80–100 °C to promote glass-fibre wetting at the interface with metal barb inserts; a cold mould below 60 °C leads to weld-line shortening of fibres and creates capillary paths along partially wetted glass bundles. This is the critical threshold risk: the conditioned polyamide 12 matrix absorbs some moisture at 50% relative humidity, but the weld-line region may absorb fuel faster if fibre orientation is perpendicular to flow. Terminal products include fuel line clip retainers, evaporative canister mounting brackets, underbody fuel line spacers, and quick-connect lock rings where snap-fit modulus and hot-oil ageing retention are balanced. Batch-to-batch variance in screw recovery time on 25 mm barrier screws often correlates with clumping of 50% glass bundles when hopper-loader preheating is not controlled, and processing logs should track melt cushion stability within ±2 mm to avoid density fluctuations at the gate.
On food-packing lines where washdown cycles expose drive components to alkaline foam detergents and 0.5% peracetic acid at 40–60 °C, standard acetal gears suffer from acid-catalysed surface degradation at tooth roots and glass-filled PA66 loses tensile strength after repeated steam exposure. The 50 wt% glass-reinforced PA12 compound with FWA natural designation is specified for gears, chain guides, and star wheels where EU Regulation (EU) No 10/2011 overall migration into food simulants A, B, and D2 and FDA 21 CFR 177.1500 nylons provide the food-contact framework. Formulation discipline is strict: the natural grade is used at 100 wt% as supplied; regrind from post-industrial runners may be reintroduced at up to 20 wt% only if the recyclate comes from the identical food-approved natural grade and the processor can demonstrate traceability under Regulation (EU) 2022/1616 on recycled plastic food-contact materials, because fibre shortening from reprocessing raises surface roughness and lowers fatigue resistance in tooth bending. Downstream processing usually involves 30–60 mm injection-moulding machines with nitrided barrels and screw tips due to glass-fibre abrasion; mould temperature is set between 80 °C and 100 °C, and cycle time is determined by the need to reach sufficient crystallinity in thick gear hubs to avoid post-mould shrinkage after first washdown. The deep-dive zone is gear tooth root fillet radius: if the fillet radius is below 0.5 mm, local glass orientation at the tooth base creates a shear band that can reduce gear tooth bending fatigue, so cavity machining must be inspected at 300× magnification for microchipping. Terminal parts include conveyor chain guides, rotary scraper blades, filling-star wheels, and gear pump idlers, all of which require non-black natural colour for metal-detectable or visual inspection standards such as EN 1672-2 hygiene design.
Aluminium pneumatic manifold blocks are progressively replaced in compressed-air preparation units by 50 wt% glass-filled polyamide 12 because condensate pH in oil-flooded compressor networks typically falls between 4.0 and 6.5 and triggers galvanic pitting at aluminium-to-brass valve interfaces. EMS-Grivory Grilamid LBV-50H FWA nat, with its glass content fixed at 50 wt%, is processed without additional filler; dry-air service requires pre-drying at 80 °C for 4–8 h to a moisture level not exceeding 0.08 wt%, because higher residual moisture foams at the melt front and reduces burst-pressure retention at the manifold wall. Compressed-air systems in the EU are assessed under ISO 8573-1:2010 purity classes for particle, water, and oil content, while pressure-bearing thermoplastic components are validated under cyclic pneumatic endurance and flow-characteristic testing derived from ISO 6358-1:2013. Injection moulding for this segment uses 30–50 mm barrels with gas-tight hopper loading and mould temperatures of 80–100 °C; the non-return valve must be inspected at regular intervals because glass-fibre wear opens the blow-back path and changes shot-to-shot density. Regrind use in load-bearing pneumatic parts is generally restricted to 15 wt%, and each regrind fraction is validated by burst testing at 1.5× maximum working pressure because cyclic fatigue is governed by glass-fibre length retention rather than bulk tensile strength. Terminal products in this segment include filter bowls, pressure regulator housings, solenoid valve bodies, compact manifold bases, and pneumatic cylinder end caps where dimensional stability under oil mist and condensate is deterministic.
When an outdoor sensor housing must maintain sealing-channel flatness below 0.1 mm after 1,000 h of 85 °C/85% RH damp heat, the low moisture uptake of PA12 relative to PA66 becomes the decisive material variable. The 50 wt% glass-filled Grilamid LBV-50H FWA nat compound is moulded in natural form without additional colourant in designs that do not require electromagnetic shielding; if a carbon black masterbatch is required for UV-stable outdoor versions, the addition ratio is limited to 2 wt% because pigment dispersion at the glass-matrix interface can nucleate local warpage. Compliance is shown through IEC 60068-2-78:2012 steady-state damp heat, IEC 60529 IP66/IP67 enclosure ingress protection, and UL 94 HB flammability acceptance for non-structural housings. Downstream production uses 50–80 mm injection-moulding machines with sequential valve-gate control and two-stage injection to reduce floating glass fibre at knit lines; the thick-to-thin transition at connector bosses is gated in the thick wall first, and holding pressure is maintained until gate freeze is verified by screw position rather than timer to avoid post-mould warpage of 0.3–0.6 mm across 200 mm flange lengths. A key limitation is that 50 wt% long glass content generates anisotropic shrinkage; published data for this specific configuration is limited, so cavity pressure data from in-mould sensors should be collected at 60–90 MPa and correlated with post-mould dimensions before fixing production windows. Terminal end products include outdoor telemetry housing bases, sensor pods, photovoltaic combiner-box shells, and traffic-control equipment enclosures where dimensional stability after moisture conditioning is the acceptance criterion.
Carbonated water and post-mix beverage equipment cycle between 2 °C syrup lines and 70 °C sanitizing rinse cycles, producing repeated thermal expansion differences between the polymer manifold and stainless steel fittings. The 50 wt% glass-filled PA12 natural grade is selected for these fluid-distribution manifolds because it retains ductility in the conditioned state and does not hydrolyse as rapidly as glass-filled PA66 in hot water with dissolved CO₂. The glass addition is fixed at 50% by mass; additional internal lubricants are not used because they would leach into beverage-contact water and fall outside the FWA positive list. Compliance centres on Regulation (EU) No 10/2011 for food contact, German DVGW W270 for microbial growth, and 3-A Sanitary Standards for piggable components where installed in dairy beverage hybrid systems. Production uses injection-moulding tools with hot sprues and oil-heated moulds at 80–100 °C to ensure strong knit lines at multi-port manifold intersections. The critical threshold is weld-line strength under hydrostatic pressure cycling; a manifold with knit-line fibre orientation perpendicular to hoop stress can fail at cyclic pressures below the nominal short-term burst rating, so mould flow simulation must place weld lines in low-hoop-stress zones or use overflow tabs. Terminal finished parts include carbonator inlet/outlet manifolds, syrup distribution blocks, beverage dispenser mixing chambers, and hot-water sanitizing circuit adapters where glass fibre reduces creep under continuous clamp loads. Operational boundary: exposure to concentrated citric acid cleaners above 2 wt% at 80 °C for more than 30 min may attack the glass-matrix interface, and such exposure should be pre-validated by ISO 175:2010 immersion before production release.
Competitive EMS-Grivory Grilamid LBV-50H FWA nat Nylon 12, 50% Glass Fiber Filled, Conditioned prices that fit your budget—flexible terms and customized quotes for every order.
For samples, pricing, or more information, please contact us at +8615365186327 or mail to admin@ascent-chem.com.
We will respond to you as soon as possible.
Tel: +8615365186327
Email: admin@ascent-chem.com
Flexible payment, competitive price, premium service - Inquire now!
EMS-Grivory Grilamid LBV-50H FWA nat is a natural-colour polyamide 12 compound reinforced with 50% glass fibre by weight and supplied in a heat-stabilised formulation. The grade is designated under ISO 1043-1 as PA12-GF50; the FWA suffix identifies a manufacturer-controlled formulation intended for food-contact and potable-water components, subject to final article migration testing. The H suffix denotes heat stabilisation, and nat denotes the natural, unpigmented colour state. Datasheet values are reported for the conditioned state, meaning test specimens were equilibrated at 23 °C and 50% relative humidity in accordance with ISO 291 before mechanical testing. This is not an as-moulded state; it reflects long-term service in a humid air environment rather than oven-dried packaging.
The compound is typically specified for pump impellers, water-meter bodies, valve housings, drinking-water couplings, and structural brackets where moisture uptake, chemical resistance, and dimensional stability under load are critical. Published data for this specific glass-fibre-filled configuration should be interpreted with the fibre orientation, specimen thickness, and gate geometry reported in the manufacturer’s technical datasheet.
Equilibration to the ISO 291 standard atmosphere is typically carried out at 23 °C and 50% relative humidity until successive weighings differ by less than 0.1% over 24 h. Because the 50% glass-fibre phase is not hygroscopic, the absolute moisture uptake of the composite is lower than that of an equivalent unfilled PA12 resin. Absorbed water is localised in the polyamide matrix, where it disrupts hydrogen bonding, lowers the glass transition temperature, and reduces tensile stiffness while increasing impact ductility.
The degree of property shift depends on specimen thickness, fibre orientation, and testing rate; it is not a single universal factor. The following table is indicative of manufacturer-published values and should be confirmed against the current technical datasheet.
| Property | Dry-as-moulded | Conditioned | Test standard |
|---|---|---|---|
| Tensile modulus | 15,000 MPa | 11,000 MPa | ISO 527-1/-2 |
| Tensile stress at break | 170 MPa | 120 MPa | ISO 527-1/-2 |
| Elongation at break | 3.0% | 4.0% | ISO 527-1/-2 |
| Flexural modulus | 14,500 MPa | 11,500 MPa | ISO 178 |
| Charpy notched impact strength, 23 °C | 15 kJ/m² | 20 kJ/m² | ISO 179/1eA |
| Heat deflection temperature, 1.8 MPa | 175 °C | 170 °C | ISO 75-1/-2 |
| Density | 1.56 g/cm³ | 1.56 g/cm³ | ISO 1183-1 |
The moisture-induced shift from dry to conditioned reduces stiffness and strength by approximately 15–30% and increases notched impact energy. This response is reversible; desorption in a dry or hot environment returns the matrix toward dry-state behaviour, though rapid drying can introduce surface stresses and reduce toughness at low temperatures. The values above are not design minima. They are single-point data on injection-moulded specimens and do not capture the effect of flow direction, weld lines, moisture distribution, or long-term creep. Load-bearing design should use creep-rupture and fatigue data generated at the intended temperature and humidity, not short-term tensile values.
Drying of the granules is required before melt processing irrespective of the conditioned designation. A desiccant dryer set to 80 °C for 4–6 h is recommended to reach residual moisture below 0.10%; material exposed to uncontrolled humidity may require up to 12 h. The practical processing window is bounded by the melting point of PA12 near 178 °C and the onset of oxidative chain scission above 290 °C. Barrel profiles are normally set from 240 °C at the feed throat to 270 °C at the nozzle; residence time above 280 °C should be kept below 5 min. Batch-to-batch variation in natural colour can shift melt temperature by approximately ±5 °C; therefore, production runs use a stable melt cushion and pyrometer checks for repeatability.
The 50% glass-fibre content is abrasive. Unprotected general-purpose screws and barrels exhibit accelerated wear; nitrided or bimetallic surfaces are specified. A three-zone screw with a compression ratio near 2.5:1 and a residence time below 5 min reduces fibre-length degradation. A shut-off nozzle is preferred to avoid drool, and hot-runner systems, if used, must be externally heated and free of stagnant flow paths.
Mould filling uses medium-to-high injection velocity to prevent premature freeze-off in thin sections. Hold pressure is typically 50–70% of peak injection pressure, with a melt cushion of 3–5 mm. Back pressure during plasticating is limited to 0.5–1.0 MPa to limit glass-fibre attrition. Regrind should be restricted to 30% by weight because repeated melting shortens fibre length and reduces notched impact performance. Drying of regrind follows the same residual-moisture requirement.
Melt rheology is shear-thinning but highly filled, so pressure requirements escalate in long flow paths. The mould-filling phase should be designed to avoid jetting; flow fronts from restricted gates can leave visible glass-rich weld lines with anisotropic mechanical properties. Weld-line tensile strength in a 50% glass fibre PA12 may be less than 50% of the nominal flow-direction value depending on part geometry and melt temperature. If functional loads cross a weld line, it is necessary to reposition the gate or validate the part by testing weld-line specimens under the same loading mode.
For wall sections below 1.0 mm, fill pressure increases sharply because the high glass content raises viscosity relative to unfilled PA12. For sections above 4.0 mm, uneven crystallisation and sink marks become more likely unless packing pressure is maintained until gate freeze. Mould design should use generous runners and avoid abrupt thickness changes to limit flow-front instability.
Water absorption at saturation according to ISO 62 is reported below 1.0% by weight for this glass-filled PA12; the glass reinforcement reduces absolute water uptake relative to unfilled PA12. The consequence is lower moisture-induced dimensional change than PA6 or PA66 glass-filled grades in applications with intermittent water exposure.
Mould shrinkage under ISO 294-4 is anisotropic. Manufacturer-published values are typically below 0.2% in the flow direction and below 0.4% transverse to flow because the 50% fibre content restricts matrix contraction along the fibre axis. The coefficient of linear thermal expansion is also anisotropic, with longitudinal values near 2.0×10−5 K−1 and transverse values near 7.0×10−5 K−1. These values support designs with metal inserts only when residual stresses are accounted for.
In hot-water environments above 60 °C, dimensional changes follow a more complex curve because moisture absorption and thermal expansion occur simultaneously. Published data for this specific configuration in pressurised hot-water loops are limited; therefore, part validation under the intended temperature-pressure profile is required. The glass reinforcement improves tensile modulus and heat deflection temperature but not fatigue resistance uniformly. Under alternating loads in wet environments, the PA12 matrix absorbs water and reduces interfacial shear strength at the glass-matrix boundary. This can accelerate micro-damage growth and reduce fatigue life relative to dry predictions. Components subjected to cyclic pressure surges in water distribution systems should therefore be evaluated with hydrated specimens under pressure pulsation testing, not only with dry tensile bars.
Relative to unfilled PA12 grades, the 50% glass-fibre loading increases tensile modulus by approximately one order of magnitude and reduces elongation at break from over 200% to below 5%. The trade-off is lower un-notched impact and greater anisotropy in shrinkage and modulus. The conditioned grade retains a measurable increase in notched impact energy compared with dry as-moulded specimens, but it is not a toughened grade.
Relative to PA66-GF50, the PA12 backbone reduces equilibrium water absorption and yields better dimensional stability in humid service, lower density, and improved resistance to stress cracking in zinc-chloride-containing environments. PA66-GF50 may present higher dry tensile modulus and higher heat deflection temperature at equivalent glass loading; selection between the two depends on the relative weighting of dry heat resistance versus wet dimensional stability.
Compared with polyphthalamide or PPS-based glass-reinforced compounds, this PA12 grade processes at lower melt temperature and produces lower tool wear, but its continuous-use temperature and creep resistance in high-temperature oil or steam are lower. The material is not a substitute for PPS in environments requiring continuous service above 150 °C.
In potable water and food-contact applications, the FWA designation means EMS-Grivory has controlled the formulation for relevant migration and organoleptic evaluations. For European food-contact use, compliance is assessed under EU Regulation 10/2011; for United States food-contact use, the polyamide resin family is referenced by 21 CFR 177.1500. The converter must verify that the finished article, including colourants, regrind, and processing aids, meets the specific migration limits and intended use conditions.
In water-meter and drinking-water coupling replacements for metal, the density reduction relative to brass is significant: the compound density is near 1.56 g/cm³, compared with approximately 8.5–8.7 g/cm³ for brass. The resulting part mass reduction can exceed 80% at equal envelope dimensions. The moulded component also avoids dezincification corrosion, but long-term resistance to chlorinated water must be tested for the specific chlorine residual, temperature, and stagnation duration.
In comparison with PPS-GF40, this PA12-GF50 grade provides higher elongation at break and notched impact energy but lower continuous heat resistance. It also absorbs more water than PPS, so dimensions in continuous water immersion will shift more than a PPS alternative. The processing advantage is a lower melt temperature and lower barrel wear, but the service boundary in steam or superheated water remains below 100 °C for continuous load-bearing use unless validated experimentally.
Chemical resistance follows general PA12 behaviour: resistance to aliphatic hydrocarbons, oils, greases, and many solvents is well documented; strong acids, phenols, and oxidising media are not recommended. Stress-cracking resistance under continuous tensile load is superior to amorphous polycarbonate and some PA66 grades, but it is not unlimited in hot-water/antifreeze mixtures or strong saline environments. Any component in continuous contact with a fluid should be validated under the actual service temperature and strain, using specimens of identical gate and weld-line geometry.
The FWA suffix is a formulation-level declaration, not a certificate for a specific finished part geometry. Migration behaviour depends on surface-to-volume ratio, flow velocity, stagnation, and sterilisation protocol. No combination with amine- or sulfonamide-based processing aids should be made without revalidation, because such additives can shift migration profiles and reduce long-term performance in potable water service. Published data for this specific configuration in chlorinated water or high-oxidant service is limited.
