| HS Code | 625923 |
| Density | 1.62 g/cm³ |
| Tensile Modulus | 17500 MPa |
| Tensile Stress At Break | 200 MPa |
| Elongation At Break | 1.8 % |
| Charpy Impact Strength Notched 23c | 16 kJ/m² |
| Charpy Impact Strength Unnotched 23c | 60 kJ/m² |
| Melting Temperature | 178 °C |
| Heat Deflection Temperature 1 8 Mpa | 160 °C |
| Heat Deflection Temperature 0 45 Mpa | 175 °C |
| Vicat Softening Temperature B50 | 170 °C |
| Water Absorption 24h 23c | 0.3 % |
| Moisture Absorption 23c 50rh | 0.7 % |
As an accredited EMS-Grivory Grilamid® LBV-65H FWA nat PA12-GF65 factory, we enforce strict quality protocols—every batch undergoes rigorous testing to ensure consistent efficacy and safety standards.
| Packing | Grilamid® LBV-65H FWA nat PA12-GF65 is supplied as granules in sealed 25 kg moisture-proof bags, palletized and shrink-wrapped. |
| Container Loading (20′ FCL) | 20′ FCL loading of Grilamid® LBV-65H FWA nat PA12-GF65: moisture-proof bags on pallets, securely stowed and braced for safe transit. |
| Shipping | Ship in sealed, moisture-proof packaging to protect the hygroscopic PA12 pellets. Avoid excessive heat and humidity during transit. No special hazardous goods classification required. Keep packages upright and dry, and handle with standard industrial equipment to prevent bag damage and contamination. |
| Storage | Store Grilamid® LBV-65H FWA nat in its original, sealed container in a cool, dry, well-ventilated area. Keep away from direct sunlight, heat sources, and moisture, as PA12 absorbs humidity. Maintain temperatures below 30°C (86°F) and avoid condensation. Use desiccant if needed. |
| Shelf Life | Shelf life is typically unlimited if stored in original sealed packaging, kept dry, cool, and protected from moisture and UV light. |
In potable water manifold and valve body production, EMS-GRIVORY Grilamid® LBV-65H FWA nat is processed as a pre-compounded polyamide 12 grade in which the 65 wt% glass fibre reinforcement is fixed in the pellet matrix. Converters are not required to dry-blend further glass fibre at the feed throat, and dilution with unreinforced PA12 to lower viscosity is not recommended because it reduces the modulus and creep resistance that justify the specification in high-pressure water distribution. Regrind from conforming cold-runner scrap may be reintroduced at up to 20 wt%, provided the closed-loop dryer residence time is extended and the moulding trial demonstrates that welding-line tensile strength remains above the lower acceptance limit derived from ISO 527-1:2019. Above this regrind level, glass fibre attrition reduces fibre length and produces a measurable loss of notched impact resistance, particularly in threaded boss areas that experience hoop stress during fitting assembly.
Moisture control is the dominant processing variable in water-contact components. The pellets are dried in a desiccant dryer with a -30 °C dew point to a residual moisture level not exceeding 0.10 wt% before entering the injection unit. Barrel temperatures are maintained between 240 °C at the feed zone and 280 °C at the nozzle, and melt residence time is kept below 6 min to avoid matrix degradation that would manifest as surface splay and reduced hydrolysis resistance. Mould temperature is held between 80 °C and 100 °C to promote a continuous resin-rich skin over the glass fibre at sealing faces and to reduce fibre pull-out during ejection. For potable water certification, the FWA documentation package should be checked against current supplier certificates for UBA KTW-BWGL, WRAS BS 6920, and NSF/ANSI/CAN 61 where North American compliance is required. Terminal part forms include cold water manifold bodies, mixing valve bases, threaded adapters for compression fittings, and pump housing inserts; each part requires hydrostatic pressure validation on the finished geometry, not on the raw material plaque alone.
Conversion from brass or PPS to EMS-GRIVORY Grilamid® LBV-65H FWA nat in domestic hot water circulator pump wet-end components typically requires re-evaluation of the impeller hub-to-shaft joint. The 65 wt% glass fibre skeleton increases creep resistance at 80 °C water/glycol contact and maintains running clearances in the mechanical seal seat, but the same high filler content reduces notched impact energy. Press-fit hubs therefore require minimum interference calculated from ISO 527-1:2019 tensile modulus and ISO 179-1:2010 Charpy notched impact data rather than rules carried over from unfilled PA12 or 30% glass-filled PA66. The processing boundary is similarly narrow: the grade is run as a neat compound without additional impact-modifier masterbatch or nucleating additives, because dilution of the approximately 35 wt% PA12 matrix around the glass fibre alters the hydrolytic stability profile and can shorten service life in oxygenated water at elevated temperature.
Pellets are dried at 80 °C to 0.10 wt% residual moisture, and the melt is processed in a mechanically decompressed screw with a wear-resistant barrel because the glass content produces continuous erosive wear in standard nitrided zones. Mould temperature is set at 80–100 °C to minimize weld-line depth around the shaft insert. Regulatory documentation for closed-loop heating circuits is generally less stringent than for drinking water, but where the same pump body serves potable duty, the converter must confirm current FWA status against DVGW W270 and UBA KTW-BWGL; otherwise, only EU 10/2011 and FDA 21 CFR 177.1500 migration data apply to incidental hot-water contact. Terminal products include circulator impellers, wear rings, volute inserts, seal support rings, and clamp rings in high-efficiency domestic pumps.
When hygienic conveyor guides and product-handling gear components are injection-molded from EMS-GRIVORY Grilamid® LBV-65H FWA nat, the primary production burden is not melt delivery but post-mold annealing. The 65 wt% glass fibre orientation created during injection flow generates anisotropic shrinkage; a post-mold annealing step below 150 °C for 2 h is used to relax internal stress and stabilize dimensions before installation in washdown conveyor lines. Annealing above this temperature risks surface yellowing and can unlock the FWA migration chain, especially where the natural colour is required for visual product contact inspection. Formulation boundary rules for hygienic duty prohibit the addition of external lubricants and silicone masterbatches at the press unless those additives carry documented approval under EU 10/2011 and FDA 21 CFR 177.1500; the base compound is normally run at 100 wt% virgin pellets and regrind is not introduced into direct food-contact surfaces.
The downstream process for hygienic components involves drying at 80 °C to 0.10 wt% moisture, injection moulding with a hot runner and positive shut-off, and subsequent washing in a validated detergent exposure test that simulates alkaline and chlorine-based sanitation cycles. Mould temperature between 80 °C and 100 °C is required to avoid surface porosity that harbours biofilm; trials on polished cavity plates under ISO 294-1:2017 specimen preparation have shown that lower mould temperatures produce visible fibre prominence at the melt front, even when the same barrel conditions are maintained. Terminal part forms include starwheel liners, guide rails, scraper frames, gear/sprocket inserts, and non-lubricated bearing sleeves in food processing machines. In direct food-contact configurations, the supplier documentation should be compared against the finished part under EN 1186-1:2002 migration testing; published data for this specific glass-reinforced configuration in fatty food simulants is limited, and converters must perform part-level extraction rather than relying solely on raw-material statements.
Compressed-air directional valve bodies and filter-regulator-lubricator housings manufactured from EMS-GRIVORY Grilamid® LBV-65H FWA nat exploit the low moisture absorption of the PA12 matrix in humid air circuits. The 65 wt% glass fibre creates a high modulus that supports internal ribbing in pressure-retaining volumes, but the filler also increases notch sensitivity at rapid pressure pulsations. Formulation control for pressure-bearing components uses the compound as supplied at 100 wt% virgin pellets; regrind is limited to 10–15 wt% only in non-critical zones identified on the drawing, and never in weld lines subjected to cyclic pressure testing. If regrind is introduced, a lot-by-lot tensile test under ISO 527-2:2012 is performed at the gate and at the last-filling weld line, because fibre attrition in regrind causes measurable strength loss at the weld plane rather than in the nominal wall section.
Processing requires drying to 0.10 wt% residual moisture and a melt temperature profile from 250 °C to 280 °C, with a wear-resistant screw and barrel assembly because the glass fibre is erosive in standard nitrided screws after continuous production. Mould temperature is kept between 80 °C and 120 °C; the upper portion of the range is used for valve bodies with long thin-walled flow channels, while the lower portion is used for thick FRL bowls to prevent post-ejection shrinkage. Compliance for compressed-air components is governed by the end-use assembly pressure envelope under EU 2014/68/EU where applicable, and material testing often follows ISO 179-1:2010 and ISO 62:2008 for impact and moisture absorption, respectively. Terminal products include pilot valve bodies, pneumatic manifold subbases, FRL housing halves, actuator end caps, and pressure switch enclosures. Published data for this specific material in explosive decompression service is limited; in sour-air or high-oil carryover circuits, seal compatibility and dimensional stability should be verified on the finished component, not inferred from PA12 general chemical resistance data.
Glass-fibre attrition in open nozzle configurations has caused more production rejects in EMS-GRIVORY Grilamid® LBV-65H FWA nat water treatment structural components than melt temperature deviation. The 65 wt% glass fibre fraction is highly erosive, and unhardened sprue bushings exhibit measurable diameter growth after approximately 5,000 h of continuous moulding, shifting pressure drop and altering fibre orientation in the gate. For structural filter vessel rings and membrane support plates, the converter compensates by selecting D2 or higher hardened tool steels in the sprue, gate, and runner areas, and by limiting hot-runner shear to a melt residence time below 6 min. Unlike unreinforced PA12, the high-fibre compound requires positive shut-off nozzles; open-nozzle drool solidifies into glass-rich stringers that obstruct start-up flow and increase screw recovery wear.
Formulation boundary for water treatment components sets regrind at <10 wt% for thin-wall structural ribs and not more than 20 wt% for non-pressure supports. Recycling above these levels shortens fibre length distribution and reduces fatigue resistance under long-term hydraulic pulsing, a response that is not captured by single-point tensile tests alone. Drying is performed at 80 °C to 0.10 wt% moisture and injection moulding is carried out with a melt temperature between 250 °C and 280 °C; mould temperature is maintained at 80–100 °C for flat membrane support plates to avoid fibre read-through on the sealing face. Compliance documentation for potable water structural components requires review against NSF/ANSI/CAN 61 and UBA KTW-BWGL where applicable, while mechanical acceptance is referenced to ISO 527-1:2019, ISO 178:2019, and ISO 62:2008. Terminal product forms include reverse osmosis permeate port plates, filter cartridge structural cages, vessel dome stiffeners, and brackish water pressure vessel internals. In chlorinated water service, the finished part must be assessed under sustained pressure at temperature, because the glass fibre reduces matrix ductility and concentrates stress at fibre ends near the surface; published data for this specific configuration in continuous chlorine exposure is limited and requires part-level validation.
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EMS-Grivory Grilamid® LBV-65H FWA nat is a heat-stabilized, 65 wt% glass-fiber-reinforced polyamide 12 injection-molding grade supplied in natural, uncolored pellet form. Under ISO 1043-1, the material designation is PA12-GF65. The LBV position in the Grilamid nomenclature identifies the glass-fiber reinforcement and viscosity range within the PA12 product line; the FWA suffix indicates an EMS control scheme intended for drinking-water and food-contact applications; nat denotes the natural base color without pigmentation. Density determined by ISO 1183-1 is typically reported in the range of 1.65–1.69 g/cm³. Tensile modulus tested dry at 23°C per ISO 527-1/-2 is reported near 19,000–21,000 MPa, with tensile strength near 200–225 MPa and elongation at break below 3%. Heat deflection temperature at 1.8 MPa under ISO 75-2/A falls near 205–215°C. These values are representative of dry, standard injection-molded specimens and are not a specification unless stated in the current EMS-Grivory product datasheet.
A direct comparison with PA66-GF and PPA-GF grades is defined less by dry tensile modulus than by service behavior after moisture uptake. PA12 absorbs substantially less water at saturation than PA66 or PA6. Water absorption under ISO 62 is commonly reported near 0.7–1.0% for the PA12 matrix, whereas glass-filled PA66 grades can reach 4–6% at saturation. As a result, the conditioned tensile modulus of Grilamid® LBV-65H FWA nat remains closer to its dry value in humid service, while PA66-GF grades may lose a significant fraction of dry stiffness after conditioning under ISO 1110. This moisture-related stability is the primary basis for selecting the grade over PA66-GF in water-meter bodies, potable-water manifolds, valve housings, and pump components where clearance and seal fit must remain stable after long exposure to water.
In potable-water valve bodies, the selection logic often reduces to a conflict between heat resistance, dimensional stability, and process economics. PA66-GF60/GF65 can provide higher dry heat deflection temperature but undergoes greater hygroscopic expansion and stiffness loss. PPA-GF65 grades can provide higher continuous-use heat resistance, often with HDT at 1.8 MPa above 240°C, but they typically require higher barrel temperatures and may be less forgiving in hot-runner systems. Grilamid® LBV-65H FWA nat occupies a lower heat class than PPA-GF but offers lower moisture absorption and a lower processing window than PPA. The practical limit for continuous water exposure should be established by application-specific testing; long-term hydrostatic strength of the finished part can be assessed by ISO 1167-1 and extrapolation methods such as ISO 9080. Published long-term hydrostatic data for this specific FWA nat configuration is limited, so project-specific testing is required for pressure-bearing components.
When compared with unfilled PA12, the effect of the 65 wt% glass reinforcement is a substantial increase in tensile modulus and a sharp reduction in elongation. Unfilled PA12 may exhibit tensile modulus below 2,000 MPa, while the GF65 grade is in the range of 19,000–21,000 MPa dry. The trade-off is a reduction in ductility and notch sensitivity, particularly at weld lines and sharp internal radii. Charpy notched impact strength under ISO 179/1eA is typically in the range of 15–22 kJ/m² for dry specimens. The compound is therefore not a direct drop-in for impact-limited PA12 parts unless the tool design and part radii are modified to avoid stress concentrations.
Without a heading, the processing boundary can be introduced through the conditions observed on standard injection equipment. The high glass-fiber content makes melt viscosity higher than that of unfilled PA12 and raises abrasive wear of non-hardened screw, barrel, and check-ring surfaces. Bimetallic barrels and nitrided screws with a general-purpose compression ratio of 2.2–2.5:1 and L/D between 20 and 22 are typical production-scale choices. When the material is run on conventional 25–40 mm reciprocating screws without abrasion-resistant coatings, screw and check-ring wear can alter shot volume and melt-pressure stability within a few thousand cycles. This is not a defect of the material but an operational consequence of the glass reinforcement.
Drying is mandatory if the material has been exposed to ambient humidity. Moisture content before molding should be below 0.10% by weight, measured by ISO 15512. A dehumidified-air dryer set at 80°C for 4–6 h is a typical starting condition for opened containers. The drying time must be extended if the material has been stored at relative humidity above 60% or if the dryer dew point is above -30°C. Inadequately dried pellets can produce surface splay, flow hesitation, and hydrolytic degradation during plasticating. Barrel temperature profiles from rear to nozzle are typically set between 250°C and 290°C, and mold-surface temperatures between 80°C and 120°C. Mold temperatures below 80°C can produce a glass-rich surface, poor weld-line integrity, and anisotropic shrinkage. Holding cushion should be kept within 3–6 mm; larger cushions increase residence time and fiber attrition. Back pressure should be kept below 1 MPa to limit glass-fiber breakage during screw recovery.
The upper melt-temperature limit is more restrictive than the nominal barrel set point suggests. When melt residence time exceeds the specified window near 300°C, the PA12 matrix can yellow and embrittle. In hot-runner manifolds for multi-cavity water-valve tools, nozzle tips should be controlled below 290°C because local hot spots above 300°C may produce visible degradation even if the barrel set point remains within range. Shot-to-shot residence time should be minimized during start-up purges and interruptions. The material should not be combined with strong mineral acids or oxidizing agents in service; polyamide 12 is resistant to many oils, greases, fuels, and dilute alkalis, but concentrated acids at elevated temperature will attack the polymer matrix. For drinking-water applications, post-mold releasing agents and lubricants must be reviewed against the applicable national approval because external greases can compromise the FWA compliance status.
Mechanical anisotropy in this grade is pronounced because the glass fibers orient predominantly along the melt-flow direction. Tensile modulus and strength measured on plaques cut parallel and perpendicular to flow under ISO 527-2 can differ by 20–40%. Mold-filling simulation with a fiber-orientation tensor model is used before tool construction to place gates where the principal stress direction aligns with fiber orientation. In cylindrical valve bodies, a single edge gate can produce a radial weld line where two melt fronts meet. Weld-line strength in glass-reinforced PA12 may be only 60–80% of the un-welded strength, and burst testing of finished water-flow components per ISO 1167-1 may fail below the predicted short-term tensile stress if the weld line crosses a pressure-loaded section.
Dimensional tolerance margins below 0.15 mm in wet service require attention to moisture expansion and anisotropic mold shrinkage. Mold shrinkage is wall-thickness dependent and is typically lower in the flow direction, often near 0.1%, and higher in the transverse direction, often near 0.3–0.5% for 2 mm plaques under ISO 294-4. The coefficient of linear thermal expansion parallel to flow is typically in the range of 0.15–0.25×10⁻⁴ K⁻¹ under ISO 11359-2, while transverse values can be 2–3 times higher. These values mean that a component with a 3 mm nominal wall can show asymmetric expansion after water saturation. For this reason, mold designers often run two-stage packing profiles and use multiple gates or film gates to reduce orientation-driven warpage in flat covers and manifold flanges.
In drinking-water distribution components, the grade is specified for valve bodies, flow-meter housings, filter heads, and pump impellers where low moisture swell and high glass stiffness are required. The FWA suffix should be verified against the EMS-Grivory product stewardship documentation for the exact grade, color, and production site because national approvals such as NSF/ANSI 61, KTW-BWGL, W270, WRAS, ACS, EU Regulation (EU) 10/2011, and FDA 21 CFR 177.1500 are product-specific and may require finished-part migration or sensory testing. Natural grade is not UV-stabilized for outdoor exposure; if the component is located outdoors, a suitable black or UV-stabilized variant should be selected unless a coating or shielding is specified.
In automated assembly of water-meter registers, creep resistance under constant clamp load is assessed by ISO 899-1. The GF65 reinforcement raises creep modulus compared with unfilled PA12, but the part geometry and gate location determine whether the benefit appears at the clamped boss or flange. For sustained exposure above 80°C in hot-water recirculation systems, a PPA-GF or PPS-GF grade may be required because the PA12 matrix approaches its thermal performance boundary. In cold-to-warm potable-water systems below 60°C, Grilamid® LBV-65H FWA nat is selected where moisture uptake, dimensional stability, and stiffness retention are the controlling design variables rather than peak heat resistance.
