| HS Code | 504846 |
| Density | 1.09 g/cm³ |
| Water Absorption Saturation | 0.7 % |
| Mold Shrinkage | 0.2 - 0.4 % |
| Tensile Modulus | 11000 MPa |
| Tensile Strength At Break | 160 MPa |
| Elongation At Break | 3 % |
| Flexural Modulus | 10500 MPa |
| Flexural Strength | 190 MPa |
| Charpy Notched Impact Strength 23 C | 10 kJ/m² |
| Melting Point | 178 °C |
| Heat Deflection Temperature 0 45 Mpa | 170 °C |
| Heat Deflection Temperature 1 8 Mpa | 155 °C |
| Glass Fiber Content | 25 % |
| Condition | Dry |
As an accredited EMS-Grivory Grilamid LBV-25H black 9472 Nylon 12, 25% Glass Fiber Filled, Dry factory, we enforce strict quality protocols—every batch undergoes rigorous testing to ensure consistent efficacy and safety standards.
| Packing | Packaged in 25 kg sealed, moisture-proof bags. Dry black nylon 12 pellets, 25% glass fiber filled, ready for processing. |
| Container Loading (20′ FCL) | Load 20′ FCL with palletized, moisture-proof bags of Grilamid LBV-25H black 9472 dry nylon; secure cargo firmly to prevent shifting. |
| Shipping | EMS-Grivory Grilamid LBV-25H black 9472 is a dry, glass-fiber-reinforced Nylon 12 supplied as pellets. Ship in sealed, moisture-proof containers to prevent water absorption, which affects processing. Store in a cool, dry area. Not classified as hazardous; standard freight handling applies. |
| Storage | Store Grilamid LBV-25H black 9472 in its original, sealed packaging in a cool, dry environment away from direct sunlight, heat sources, and moisture. Avoid exposure to humidity, which can affect the dry nylon's properties. Maintain ambient temperatures and stable conditions, ensuring the pellets remain uncontaminated. Under proper storage, shelf life is typically one year from delivery. |
| Shelf Life | Store in original sealed container, cool and dry. Shelf life typically 2 years from manufacture date if unopened. |
Assemblies qualified under SAE J2044 for automotive fuel-system quick connectors impose retention-force, pressure-cycling, and fuel-exposure requirements that expose creep in unfilled polyamide 12 locking tabs at elevated service temperature and dimensional shift after prolonged contact with oxygenated fuel. The compound EMS-Grivory Grilamid LBV-25H black 9472 Nylon 12, 25% Glass Fiber Filled, Dry is introduced as the sole resin feed without addition of unfilled PA12 or separate glass roving, because the 25% by weight short-glass-fiber fraction is already dispersed in the PA12 matrix during compounding. The material is released from closed containers only where moisture content is verified below 0.10%; if exposed to ambient air at relative humidity greater than 35% for more than 30 min, re-drying is performed in a desiccant dryer with a dew point of -30 °C at 80 °C for 4 h. Industry compliance for this connector segment references SAE J2044 for fitting geometry and locking-tab function, SAE J2260 for nonmetallic fuel-system tubing, and ISO 16750-4 for environmental load testing, while material-specific data are generated according to ISO 527-2 for tensile modulus, ASTM D638-14 for tensile properties, and ISO 1133-1:2022 for melt volume-flow rate.
Molding is carried out on reciprocating-screw injection machines with a screw length-to-diameter ratio between 18:1 and 22:1, compression ratio between 2.0:1 and 2.5:1, and barrel temperature settings from 230 °C at the feed zone to 260 °C at the nozzle. Mold temperature is kept in the 60 °C to 80 °C range using turbulent water flow; valve-gated hot-runner drops prevent stringing of the glass-filled melt and reduce gate vestige on sealing faces. The process window narrows at high glass-fiber concentration near gate land length: excessive hold pressure transferred through a gate land below 1.0 mm has produced packing-induced residual stress and radial cracking on connector sidewalls in high-volume trials. Production equipment logs from multicavity tools also show that contamination of the feed with PA66 regrind must be avoided, because phase separation at the glass-fiber interface creates weak weld lines and poorly fused locking tabs. Terminal finished product types include SAE J2044 quick connectors, fuel vapor return fittings, fuel bundle clips, and fuel sender flange retainers.
In molded push-to-connect fittings produced under SAE J2494-3, sealing-barb ovality must remain within ±0.05 mm across the operating range from -40 °C to 100 °C, because loss of roundness compromises the pneumatic seal on nylon tube inserted under SAE J844. The compound is fed at 100% of the molding resin charge; post-industrial regrind from sprues and runners is limited to 20 wt% of the total charge and is blended only with virgin lots of the same specification to avoid viscosity drift that shifts glass-fiber length distribution. Industry compliance extends to SAE J1131 for air-brake tube and fitting assembly practice and ISO 14743 for push-in connectors for thermoplastic tubing. The primary process conflict is differential shrinkage caused by anisotropic glass-fiber orientation between the gate and the sealing barb: tools without flow leaders or valve-gated drops from a central sprue have recorded batch-to-batch ovality drift of 0.03 mm to 0.06 mm after 5,000 cycles.
Control is achieved by drying to residual moisture below 0.08% and processing on a shooting-pot injection unit with a three-zone screw, screw speed not exceeding 150 min⁻¹, and melt residence time held under 8 min at nozzle temperatures not exceeding 265 °C. Mold temperature is maintained with a minimum of 15 K differential across core and cavity only after flow simulation confirms that the differential does not produce bow in the fitting body. Cavity pressure transducers are used to hold peak pressure between 60 MPa and 80 MPa until gate freeze; shorter hold times result in sink marks in the barb root, and longer hold times increase cycle time without measurable dimensional benefit. A four-cavity hot-runner tool running on an 800 kN to 1,200 kN clamp force machine is typical for this component size, with valve-gate sequencing adjusted to balance flow length across cavities. Terminal finished product types include push-to-connect brake-system fittings, diagnostic port bodies, treadle valve plates, and pneumatic manifold blocks.
The use of the 25% glass-fiber-reinforced PA12 in cable management components exposed to diesel splash and hydraulic fluid takes advantage of the low saturated water absorption of the matrix, which limits dimensional change after humid aging relative to PA6 alternatives. The compound is processed at the nominal glass loading; no flame-retardant powder, impact modifier, or color masterbatch is added at the hopper because black colorant is already incorporated as black 9472. Compliance for cable ties is evaluated under UL 62275 and IEC 61386-1 where conduit routing is involved; components intended for rolling-stock interiors are excluded from this scenario where EN 45545-2 hazard levels beyond HL1 are required, because the glass-filled PA12 grade carries no railway-specific flame-retardant formulation. High-speed injection with a gate located at the cable-tie head is used to minimize glass-fiber orientation transverse to the tie axis; the molding machine is equipped with a hydraulic accumulator to achieve fill speeds above 150 mm/s in thin walls below 1.5 mm. Terminal finished product types include heavy-duty cable ties, routing clips, mounting brackets, and clamping blocks for external equipment.
Pneumatic cylinder end caps designed to ISO 15552 interfaces are subjected to repeated shear loads at piston velocities up to 3 m/s, requiring a material matrix that holds seal-groove geometry in air supplies dried to pressure dew points as low as -40 °C. Grilamid LBV-25H black 9472 enters the process with the glass fiber already incorporated at 25% by weight; downstream compounding is not performed on the shop floor, and the only permitted addition is 0.1% to 0.3% of a PA12-compatible processing aid where ejection sticking is observed on untextured mold surfaces. Compliance for the pneumatic circuit references ISO 15552 for cylinder mounting dimensions, ISO 8573-1 for compressed-air quality classes, and ISO 10099 for pneumatic components. The process uses injection molding with positive core cooling, and because the glass fiber raises viscosity, holding pressure must be maintained until gate freeze: typical holding times for wall thicknesses from 3 mm to 6 mm run from 8 s to 25 s at mold temperatures between 70 °C and 85 °C. Terminal finished product types include cylinder end caps, piston guides, flow-control valve bodies, and buffer plate housings.
When metal wear rings are substituted with glass-filled PA12 in centrifugal pumps, the acceptance criterion becomes resistance to corrosion, reduction in rotor-to-stator seizure risk, and retention of compressive modulus at pump casing temperatures up to 85 °C. The compound is used as a pre-dried feedstock at 100% of the molding charge; 25% glass fiber by weight provides creep resistance, while the PA12 matrix limits water-induced swelling in water-based coolants. Compliance evidence draws from ISO 5199 for pump design, ANSI/HI 9.6.6 for wear-ring clearance, and ASTM D3702-94 for wear rate in thrust washer configuration. Production sequence involves injection molding a near-net ring blank with wall thickness from 5 mm to 12 mm, followed by post-machining of the wearing face to a flatness tolerance of 0.02 mm and clearance fitted to impeller diameter. A deep-dive processing limitation is void formation in sections above 8 mm: molders hold melt temperature near 250 °C, reduce screw backpressure to 0.5 MPa to 1.0 MPa, and extend hold time to prevent shrinkage voids that act as crack-initiation sites under cyclic axial thrust. Published comparative wear data for Grilamid LBV-25H black 9472 in ISO 5199 pump service with specific impeller metallurgies is limited; qualification tests are required for each impeller material and clearance condition. Terminal finished product types include pump wear rings, coupling inserts, thrust disks, and split spacer rings.
Hydraulic filter heads in mobile equipment operate with mineral oil at bulk temperatures from 60 °C to 100 °C, and the low moisture absorption of PA12 prevents the post-mold dimensional growth seen in PA66 components exposed to humid air. The material is molded at the nominal 25% glass-fiber loading; no carbon black or antioxidant masterbatch is added at the press because black 9472 already contains the specified stabilization. Industry compliance for hydraulic filter components references ISO 3968 for hydraulic filter element performance, ISO 2943 for fluid compatibility, and ISO 4406 for fluid cleanliness. The injection-molding process for wall sections between 4 mm and 10 mm uses sequential valve-gate opening to prevent weld lines at filter-bowl thread roots; because the glass-filled melt has a narrow processing window, the nozzle temperature is held between 255 °C and 270 °C, and melt residence time is kept under 6 min to limit oxidative discoloration. Published fatigue data for thick-section glass-filled PA12 under cyclic hydraulic pressure for this specific filter-head geometry is limited; hydrostatic proof testing per customer specification is required before release. Terminal finished product types include hydraulic filter heads, bypass valve bodies, breather caps, and filter bowl retaining rings.
Competitive EMS-Grivory Grilamid LBV-25H black 9472 Nylon 12, 25% Glass Fiber Filled, Dry 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-25H black 9472 is a 25% glass-fiber-reinforced, heat-stabilized polyamide 12 injection-molding compound designated for dry-state testing and low-moisture melt processing. The grade name encodes the polymer family, the 25% glass-fiber weight fraction, heat stabilization, and the masterbatch reference black 9472. The term “dry” refers to the moisture condition used for mechanical property reporting, typically controlled to <0.10% residual moisture by weight, not to a permanent hydrophobic surface state. Pelletized material is supplied for conventional reciprocating-screw injection molding and is usually dried before processing when storage humidity has caused moisture uptake.
Laboratory reporting for this material class uses ISO 527-1:2019 and ISO 527-2:2012 tensile specimens, ISO 179-1:2010 Charpy bars, and ISO 75-1/-2 heat deflection specimens. Dry-state tensile modulus of a 25% glass-fiber polyamide 12 compound typically lies in the 5,500–7,000 MPa range, whereas unreinforced PA12 falls closer to 1,400–1,600 MPa. Tensile strength at break is generally in the 90–110 MPa range in the dry state, and elongation at break is reduced to approximately 3–5%. Notched Charpy impact at 23 °C for dry specimens is usually reported between 8–12 kJ/m². These ranges represent the glass-filled PA12 class rather than lot-specific certificates; published data for this specific configuration is limited, so the original EMS-CHEMIE datasheet and batch certificates remain normative. Because the grade is designated dry, tensile inputs for finite-element models must not be mixed with conditioned values. After conditioning under ISO 1110 atmosphere, modulus and tensile strength decrease while elongation increases; for glass-filled polyamide 12, the modulus shift can be 10–20% depending on part thickness and exposure time.
Pre-drying in a desiccant dryer with a dew point below −30 °C is applied for 4–8 h at 80 °C when moisture exceeds 0.10%. Melt temperature is maintained between 230 °C and 260 °C, and mold surface temperature is controlled at 40–80 °C. A three-zone general-purpose screw with an L/D ratio of 20:1–25:1 and a low-compression check ring is used to limit glass-fiber breakage. Screw speed and back pressure are kept low because fiber-filled PA12 undergoes shear heating and can exceed 270 °C in the compression zone when high back pressure is combined with fast screw recovery. Production-scale experience shows that surface splay from moisture-driven hydrolysis and dark streaks from thermal oxidation are the main visual defects when drying and melt-temperature limits are exceeded. If hot-runner systems are used, manifold and nozzle temperatures are held below 260 °C to reduce residence-time-induced degradation. Specimens are molded per ISO 294-1 with documented holding pressure and injection velocity; otherwise mechanical comparisons across batches are not reproducible.
Polyamide 12 absorbs substantially less water than PA66 or PA6. Under 23 °C/50% RH equilibrium, glass-filled PA12 grades commonly reach 0.3–0.7% moisture by mass, while glass-filled PA66 can reach 1.5–2.5%; the test method is ISO 62. The lower moisture absorption reduces humidity-driven dimensional growth and surface electrical leakage drift. In road-salt chloride exposure, this material class demonstrates stress-crack resistance not typical of PA66; field failures of glass-filled PA66 in zinc chloride-containing environments have driven substitution to PA12-GF25 for underbody and fuel-line retention clips. Resistance is assessed by constant-strain exposure per ISO 22088-2 or by customer-specific chloride immersion at 23–60 °C, but no resistance claim extends to all glycols, strong acids, or strong oxidizers without EMS chemical compatibility data. Fuel and oil exposure is evaluated by ISO 175 immersion and subsequent tensile property retention; certification requires product-specific fuel testing.
Automotive injection molders use this class for clips, brackets, pneumatic connectors, and cable-management parts where PA66-GF25 would provide acceptable strength but unacceptable moisture-dependent dimensional change or chloride stress cracking. In compressed-air systems, low moisture uptake preserves pressure-retaining dimensions in humid environments. Weld-line strength is a processing boundary: the front of a melt stream carrying glass fibers orients them perpendicular to the weld plane, so tensile strength at a knit line can be reduced by 30–50% relative to bulk strength. Gate positioning, sequential valve-gate timing, and wall thickness above 2 mm are used to move weld lines out of load-bearing zones. Fiber orientation at sharp corners also lowers local tensile strength; radii below 0.5 mm are avoided in load-bearing regions.
Compared with PA66-GF25, the dry-state heat deflection temperature of PA12-GF25 is lower, typically 150–165 °C under 1.80 MPa per ISO 75-1/-2, while PA66-GF25 can exceed 230 °C. PA66-GF25 offers higher tensile strength and modulus, but at a density of 1.30–1.38 g/cm³ compared with 1.22–1.25 g/cm³ for PA12-GF25. The PA12 grade is selected when lower water absorption, better dimensional stability after humid aging, lower density, and resistance to zinc chloride road salt outweigh peak dry strength. Differential scanning calorimetry per ISO 11357-3 shows the PA12 melting endotherm near 175–180 °C, and the glass transition is approximately 45–50 °C; these lower transitions reduce melt-processing energy but also limit continuous service at temperatures where PA66-GF25 remains dimensionally stable. Against unfilled PA12, the 25% glass fiber increases tensile modulus by approximately 3.5–4× and elevates HDT/A by roughly 90–110 °C. It also reduces mold shrinkage and increases the probability of anisotropic warp. The tradeoff includes lower notched impact relative to some toughened unfilled grades, higher melt viscosity, and greater tool abrasion.
| Property | Test standard | PA12-GF25 dry | Unfilled PA12 dry | PA66-GF25 dry |
|---|---|---|---|---|
| Density | ISO 1183-1 | 1.22–1.25 g/cm³ | 1.01–1.02 g/cm³ | 1.30–1.38 g/cm³ |
| Tensile modulus | ISO 527-1/-2 | 5,500–7,000 MPa | 1,400–1,600 MPa | 7,000–9,000 MPa |
| Notched Charpy impact, 23 °C | ISO 179-1/1eA | 8–12 kJ/m² | 5–10 kJ/m² | 8–12 kJ/m² |
| Heat deflection temperature, 1.80 MPa | ISO 75-1/-2 | 150–165 °C | 50–60 °C | 230–250 °C |
| Water absorption, 23 °C/50% RH | ISO 62 | 0.3–0.7% | 0.7–1.0% | 1.5–2.5% |
Mold shrinkage is direction-dependent in glass-fiber-filled PA12. Flow-direction shrinkage for 25% GF can fall below 0.5%, while transverse shrinkage can exceed 1.0%; ISO 294-4 provides the measurement basis. Tool design should account for this anisotropy by moving gates to bulk sections and using flow leaders to balance filling. A mold temperature of 60–80 °C reduces post-mold crystallinity drift but increases cycle time. Draft angles of 0.5–1.0° are typical for untextured core faces; textured surfaces require additional draft. Because the compound is black, through-transmission laser welding is limited to laser-transparent counter-parts; the laser absorbance and transmission should be verified at the planned wavelength before tooling release.
The grade is not presumed suitable for prolonged hot-water service above 80 °C or for concentrated strong acids, phenolic solvents, or strong oxidizing agents. Electrical conductivity is not enhanced; static dissipation requires specific additives. Production lots should be received with melt-volume rate reported per ISO 1133-1:2022, residual moisture data, and colorimetric values integrated into incoming quality control. Regulatory claims are lot-specific and should be documented according to REACH 1907/2006 and RoHS Directive 2011/65/EU; no universal food-contact, drinking-water, or medical approval is implied by the material description.
