| HS Code | 210338 |
| Density | 1.23 g/cm³ |
| Melting Point | 178 °C |
| Tensile Modulus | 4600 MPa |
| Tensile Stress At Break | 45 MPa |
| Elongation At Break | 3 % |
| Charpy Impact Strength Notched 23 C | 4 kJ/m² |
| Charpy Impact Strength Unnotched 23 C | 30 kJ/m² |
| Heat Deflection Temperature At 1 80 Mpa | 60 °C |
| Heat Deflection Temperature At 0 45 Mpa | 110 °C |
| Vicat Softening Temperature | 140 °C |
| Volume Resistivity | 1e13 Ω·cm |
| Surface Resistivity | 1e14 Ω |
As an accredited EMS-Grivory Grilamid® LBKN-30H FWA BLACK 9225 PA12-GB factory, we enforce strict quality protocols—every batch undergoes rigorous testing to ensure consistent efficacy and safety standards.
| Packing | EMS-Grivory Grilamid LBKN-30H FWA BLACK 9225 PA12-GB is packaged in 25 kg moisture-proof sealed bags. |
| Container Loading (20′ FCL) | Load 20′ FCL with palletized Grilamid PA12-GB granules, secure dunnage, protect from moisture and contamination during transit. |
| Shipping | Ship Grilamid® LBKN-30H FWA BLACK 9225 in sealed, moisture-proof packaging to prevent water absorption. Store away from heat, direct sunlight, and oxidizers. Transport in clean, covered containers to avoid contamination. Protect from mechanical damage and handle with care during loading and unloading. |
| Storage | Store Grilamid® LBKN-30H FWA BLACK 9225 in its original, tightly sealed packaging in a cool, dry, well-ventilated area away from direct sunlight, heat sources, and moisture. Keep the container closed when not in use to prevent water absorption. Under these conditions, shelf life is typically several years. No special storage hazards apply when handled properly. |
| Shelf Life | Shelf life is at least 2 years if stored in original sealed packaging in a cool, dry place. |
In underhood connector housings, multi-pin ECU header bodies, and crank position sensor mounts, the 30 wt% glass bead filler in EMS-Grivory Grilamid® LBKN-30H FWA BLACK 9225 PA12-GB functions primarily as an isotropy corrective, not as a mechanical reinforcement in the short-glass-fiber sense. Unlike short-glass-fiber PA66 grades, the spherical filler does not generate strongly anisotropic long-axis shrinkage, so pin pitch deviation across a 12-cavity hot runner tool is holdable within 0.10 mm tolerance windows applied to dimensional checks on ISO 294-4 plaques. The compound is used as supplied; on production molding lines, regrind is metered into virgin pellets at a maximum ratio of 25 wt%, provided that regrind has been dried concurrently in a desiccant dryer running at 80 °C for 4–6 h to a residual moisture level below 0.10 % by mass. Contamination with PA6 or PA66 regrind is excluded because the melt-peak separation between PA12 and PA6 generates visible delamination at knit lines and reduces elongation when tested under ISO 527-2. Processing on production-scale equipment uses a three-zone general-purpose screw with an L/D ratio of 20:1 to 25:1, a reverse-flow check ring, and shot capacity held between 30 % and 70 % of barrel volume. The barrel profile is set with the feed zone at 230 °C, the compression zone at 245 °C, the metering zone at 260 °C, and the nozzle at 265 °C; mold wall temperature is held between 70 °C and 90 °C, because lower tool temperatures cause premature freeze-off in thin-walled pin-header sections and incomplete sealing-boss formation. Compliance for automotive connection systems is governed by USCAR-2 R8 for terminal retention and sealed-connector performance, supplemented by environmental conditioning under ISO 16750-4:2023 and OEM line specifications such as LV 112 where applicable. Terminal finished parts include engine-compartment connector housings, sensor bodies, high-density electrical header shells, and hybrid lead-frame carrier frames produced by insert molding.
The dominant interoperability risk in multi-cavity injection molding of pneumatic push-to-connect bodies and flow-regulator stems is not tensile strength but out-of-circularity of the threaded collet seat and bore. The 30 wt% glass bead filler lowers the difference between flow-direction and transverse shrinkage to the range where bore roundness is maintained within 0.05 mm across a 16-cavity tool when process settings are kept inside the grade's low-shear window. The formulation addition ratio in this segment is 100 % direct compound on new production runs; cold-runner regrind is limited to 20 wt%, because higher regrind fractions shift melt-flow rate under ISO 1133-1:2022 beyond the range that sustains uniform packing pressure. Pre-drying is executed in a desiccant air dryer with a dew point at or below −40 °C and inlet air temperature of 80 °C for 4 h; moisture above 0.10 % results in splay defects on short-shot threads and downstream leak rates that exceed the acceptance envelope of ISO 6358-1:2013 flow-rate characterization. On the production floor, screw recovery time is configured to avoid excessive shear: a compression ratio of 2.0:1 to 2.4:1 and back pressure of 30 bar to 50 bar are typical, while the melt cushion is held at 3 mm to 5 mm. Fill is carried out with profiled injection speeds in 2–3 stages; a high initial injection speed is followed by deceleration at 95 % of part fill to prevent jetting at the valve-gate entrance. Tool cooling uses independently controlled bubblers in the collet thread cores, with mold temperature fixed at 60 °C to 80 °C. Regulatory compliance for pneumatic connection devices is referenced to ISO 14743:2020 for dimensional interchangeability of push-in fittings and ISO 4414:2010 for system-level pneumatic safety; the finished components are not treated as pressure vessels but are validated by leak-decay rate before packing. Terminal products include push-to-connect tubing fittings, manifold blocks, speed controller bodies, silencer housings, and filter-regulator bowl connectors.
Where handheld diagnostic enclosures, blood-glucose meter shells, and portable ultrasound front housings are repeatedly wiped with 70 % isopropanol and quaternary ammonium disinfectants, this PA12-GB grade retains dimensional stability and exhibits lower moisture uptake than PA6 or PA66 under identical cleaning intervals. The spherical filler is preferred in this application because it avoids the anisotropic rib sink and long-term warp that a short-glass fiber-loaded polyamide would impart to a 1.8 mm wall section. In the molding cell, the formulation is used as supplied, with regrind of black 9225 parts restricted to 15 wt% where the exterior surface is visible, and 30 wt% where the component is internal and not subjected to cosmetic acceptance criteria. Drying is performed at 80 °C for 5 h using a desiccant dryer with a dew point below −35 °C, after which moisture content is verified at 0.08 % maximum by Karl Fischer titration. The molding process is carried out on an electric injection-molding machine with screw diameter selected for residence time below 10 min at 250 °C to 270 °C; barrel temperature is controlled zone-by-zone from 235 °C to 265 °C, the hot runner manifold is held at 260 °C, and the mold is maintained at 70 °C to 85 °C. Packing pressure is stage-controlled, with a first holding phase at 60 MPa to 80 MPa for 1.2 s and a second holding phase ramped down over 4 s, to avoid gate blush on black glossy front faces. Compliance for the housing itself is evaluated under IEC 60601-1:2005+A1:2012+A2:2020 for medical electrical equipment and under ISO 13485:2016 for the molding site's quality system. If the finished device is classified as a limited-contact medical device, biological evaluation according to ISO 10993-1:2018 remains the responsibility of the device manufacturer; raw-material cytotoxicity data alone do not establish device-level acceptance. Terminal products in this segment include diagnostic handheld housings, monitor front enclosures, connector bezels, and battery-compartment frames for medical equipment.
Substitution of acetal homopolymer in hinged spectacle temples, compression-fit lens rims, and hinge block cores is driven by PA12's lower notch sensitivity under cyclic flexure and the spherical filler's ability to preserve the dimensional relationship between the screw boss and hinge mortise. In this application, the material is processed neat and dried at 80 °C for 4 h to a residual moisture target of 0.07 %; because the black 9225 pigmentation is pre-compounded, no additional carbon black concentrate is added at the molding machine. Regrind use in this segment is capped at 20 wt%, since repeated molding above this ratio has been observed on production lines to lower Charpy notched impact under ISO 179-1/1eA and to increase the rejection rate of temple arms showing surface flow lines. The downstream process is injection-compression molding, selected because the coining stroke reduces internal stress in the hinge area and permits a lower packing pressure than conventional injection molding. Melt temperature is controlled between 240 °C and 260 °C; the mold temperature is maintained at 60 °C to 80 °C using water-fed channels and localized cartridge heaters in the hinge core. Clamping force on a 50-tonne machine is typically derated to 60 % of maximum capacity to allow the compression stroke to function; cavity pressure sensors close the switchover at 40 MPa and trigger the compression phase. Component validation follows EN ISO 12870:2018 for spectacle frame mechanical stability, including screw-retention and hinge-torque clauses, and accelerated weathering is performed under ISO 4892-2:2013 where UV-stabilized black parts are planned for outdoor use. Terminal products include full-rim sunglass frames, temple arms, detachable hinge cores, and sports goggle strap-lug components.
A low-pressure water-management valve cartridge, shower diverter stem, and compact flow regulator housing exploit the low water absorption of PA12 relative to PA66, combined with the glass bead filler's isotropic shrinkage that maintains seal-gland roundness after cyclic exposure to hot water at service temperatures up to 60 °C. In potable-water applications, the grade is used as a direct compound without in-house recompounding; regrind is excluded from certified potable-water components unless expressly authorized by the certification body, because rework incorporation can alter traceability and regulatory status. Post-industrial regrind from non-certified molding campaigns is added to general industrial parts only up to 25 wt%. The FWA designation in the trade name signals food-and-water-contact data available from the compounder; it does not replace finished-article certification under NSF/ANSI 61 or Regulation (EU) 10/2011. Drying is carried out at 80 °C for 6 h to reach 0.06 % moisture; this strict drying requirement exists because water-contact components are typically molded with higher clamp pressure and longer flow lengths through ring gates. The downstream process is multi-component injection molding: the PA12-GB body is injected first at a melt temperature of 245 °C to 270 °C and a mold temperature of 70 °C to 90 °C; after the substrate solidifies to an ejection-safe skin, a TPE seal is overmolded in a second station or on a rotary platen. Holding pressure is set to 70 MPa for the first 2 s to compensate for the higher linear shrinkage in thick boss sections. German drinking-water contact validation may be performed according to KTW-BWGL recommendations or current UBA guideline practice where applicable. If the component operates above 60 °C continuous water temperature, published long-term property data for this specific grade are limited, and the end-user should qualify the part under its own pressure-temperature cycle. Terminal products include shower diverter stems, low-pressure valve cartridges, filter head housings, and flow regulator internals for building services.
Blackout-critical optical mounts impose a flatness and insert-roundness requirement that is met by the isotropic thermal expansion of a 30 wt% glass-bead-filled PA12. The material is molded over brass or stainless steel inserts, and the spherical filler avoids the asymmetric stress relaxation around the insert that short fiber fillers generate during cooling. For this segment the recommended feed blend is 100 % virgin pellets for visible components and 25 wt% regrind only in non-visible spacer plates. Drying at 80 °C for 4 h and residual moisture below 0.10 % are enforced because insert adhesion and surface gloss near the gate are sensitive to steam. The molding process uses an electric injection machine with a shutoff nozzle. Barrel zones range from 235 °C to 260 °C, the tool is heated to 80 °C to 90 °C, and holding pressure is applied at 60 MPa to 80 MPa for 5 s; after gate freeze, pressure is released and the part is cooled for an additional 12 s before ejection. The higher mold temperature reduces roundness deviation in the insert hole, which is measured via optical CMM according to ISO 1101 geometric product specification. Compliance in electronic and optical assemblies is aligned with REACH 1907/2006 Annex XVII, RoHS 2011/65/EU, and OEM-specific low-outgassing requirements under ASTM E595-15 where thermal vacuum stability is contractually required. Terminal products include lidar mounting brackets, gimbal spacer plates, optical bench inserts, and sensor alignment frames.
Threaded cable-gland bodies, M12 field-attachable connector shells, and modular junction-box spigots in industrial automation are molded from the same 30 wt% glass-bead compound where IP-rated sealing faces must remain flat after torque loading. The glass bead filler provides isotropic shrinkage that preserves flatness of the seal rim better than short glass fiber, whose orientation along the flow path produces radial variation in post-mold warpage. In production, the material is molded as supplied, with regrind limited to 20 wt% in externally threaded parts and 30 wt% in non-sealing internal inserts. Drying follows 80 °C for 4 h to a moisture content below 0.10 %; because thread roots are sensitive to splay, a dew-point monitor is fitted to the desiccant dryer to hold −40 °C or lower. The molding machine uses an unscrewing mold or collapsible core on the thread core, with a hydraulic motor sequenced at ejection. Barrel temperature is set from 230 °C in the feed zone to 260 °C at the nozzle, while the mold is held between 60 °C and 80 °C. A short hold-pressure time of 3 s to 5 s and a gate-freeze detection routine on the controller prevent overpacking at the thread crest, which would otherwise increase tightening torque beyond the installation limit. Compliance is anchored to IEC 60529:1989+A1:1999+A2:2013 for IP65/IP67 enclosure rating tests and EN 50262:1998 for metric cable gland mechanical strength. Terminal products include cable glands, junction-box spigots, field-attachable M12 and M8 connector shells, and strain-relief nuts.
Competitive EMS-Grivory Grilamid® LBKN-30H FWA BLACK 9225 PA12-GB 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 LBKN-30H FWA BLACK 9225 is a heat-stabilized, 30 wt% glass-bead-reinforced polyamide 12 injection molding compound, classified by the supplier as PA12-GB and frequently described as PA12-GB30. The polylaurolactam backbone contains a lower amide density than PA6 or PA66, limiting equilibrium water uptake to approximately 1.5 % under ISO 62 immersion at 23 °C. The spherical glass-bead filler carries load through hydrostatic stress transfer rather than axial fiber alignment, producing more isotropic mold shrinkage than glass-fiber PA12, but lower tensile modulus than an equivalent fiber loading. The FWA suffix identifies the supplier’s food-and-water approval testing portfolio, while BLACK 9225 denotes carbon black pigmentation for black, weathering-stable components.
Published dry-as-molded benchmarks place tensile modulus in the range 2,000–2,300 MPa under ISO 527-1/-2 at 1 mm/min, with yield stress near 45 MPa and strain at break above 20 %. Notched Charpy impact strength measured according to ISO 179-1/1eA is typically 5–7 kJ/m² at 23 °C, reflecting interfacial stress concentration around the bead-matrix boundary. The melting temperature is approximately 178 °C by ISO 11357-3, while heat deflection temperature under 1.80 MPa load by ISO 75-2 method A falls between 65–75 °C. These values are dry-as-molded and should not be used for design without moisture-conditioned data; saturation can reduce tensile modulus by 15–25 % while increasing elongation at break.
Glass beads suppress orientation-induced anisotropy because a sphere has no preferred load-bearing axis. In a flat, center-gated plaque, flow-direction and transverse-direction shrinkage for the bead-filled grade differ by approximately 0.1–0.3 percentage points, whereas glass-fiber-reinforced PA12 can exhibit a difference greater than 1.0 percentage point. Mold shrinkage is typically 1.0–1.4 % in flow and 0.9–1.3 % transverse, based on 60 mm × 60 mm × 2 mm plaques and ISO 294-4 measurement practice. Actual compensation depends on wall thickness, gate geometry, mold surface temperature, and packing pressure decay.
Surface quality is controlled by filler geometry. Glass fibers can protrude after polymer skin erosion or wear, creating an oriented, fibrous appearance; glass beads produce a matte, low-prominence surface with minimal filler alignment. In tribological contacts, the spherical filler can reduce polymer transfer to metallic counterfaces, but the hard beads may abrade softer non-ferrous or polymer counterfaces. Friction coefficient must be measured on the actual molded surface under the intended pressure-velocity conditions; published data for this specific configuration is limited.
Impact failure is governed by interfacial debonding and void growth around the beads. The silane size layer raises the stress required for interfacial separation, but once the interface fails, the spherical cavities act as stress concentrators and promote crack propagation. This explains the notched Charpy reduction relative to unfilled PA12. For impact-loaded parts, rib radii, gate placement, and weld-line locations should be designed to avoid bead-rich flow-line concentrations at stress raisers.
| Property | Test standard | Typical value | Condition |
|---|---|---|---|
| Density | ISO 1183-1 | 1.24 g/cm³ | 23 °C |
| Tensile modulus | ISO 527-1/-2 | 2,000–2,300 MPa | 1 mm/min |
| Tensile stress at yield | ISO 527-1/-2 | 45 MPa | 50 mm/min |
| Nominal strain at break | ISO 527-1/-2 | 20–30 % | 50 mm/min |
| Charpy notched impact strength | ISO 179-1/1eA | 5–7 kJ/m² | 23 °C |
| Melting temperature | ISO 11357-3 | 178 °C | 10 K/min |
| Heat deflection temperature HDT/A | ISO 75-2 method A | 65–75 °C | 1.80 MPa |
| Water absorption, saturation | ISO 62 | 1.5 % | 23 °C |
| Mold shrinkage, flow | ISO 294-4 | 1.0–1.4 % | 2 mm plaque |
| Melt volume-flow rate | ISO 1133-1 | 8–16 cm³/10 min | 235 °C, 2.16 kg |
| Flammability | UL 94 | HB | 3.0 mm |
Pre-drying is managed as a critical control point. Desiccant drying at 80 °C for 4–6 h with a dew point at or below -30 °C targets residual moisture below 0.10 wt%. When ambient relative humidity exceeds 60 %, dried pellets should not remain in open hoppers longer than 2 h. Melt temperature measured at the nozzle is normally 230–250 °C. Barrel profiles are set with the feed zone cooler than the metering zone, typically 220–240 °C feed, 230–250 °C compression, and 240–260 °C metering. Melt residence time above 270 °C should be limited to less than 5 min because oxidative yellowing, black speck formation, and molecular weight loss occur beyond this boundary.
Injection molding machines with general-purpose screws of 18–22 L/D and compression ratios between 2.0:1 and 2.5:1 are suitable for initial setting. A conventional non-return check ring is acceptable, but the check ring and barrel should be hardened or bimetallic because glass beads, while less abrasive than glass fibers, still generate wear over production runs exceeding 100,000 cycles. Mold surface temperature is held between 40 °C and 80 °C. The lower setting reduces cycle time but can increase post-mold shrinkage and dimensional drift. The upper setting raises crystallinity, improves heat deflection, and stabilizes molded geometry at the expense of cooling time. For close-tolerance parts, mold temperature variation should be controlled within ±5 °C across the cavity surface because local cooling-rate differences produce crystallinity gradients that alter shrinkage.
Hold pressure settings must be established on the production tool rather than transferred from unfilled PA12. The higher thermal conductivity of the glass-bead compound accelerates gate freeze, so hold pressure decay should be matched to gate seal time rather than a fixed timer. A screw cushion of 3–5 mm is used to maintain pressure transmission. Short shots at low temperatures and burn marks at high temperatures indicate premature solidification or insufficient vent depth; when filling walls below 1.0 mm, melt temperature may be raised toward 250 °C, with corresponding residence-time control.
The decision to replace glass-fiber PA12 or PA66 glass-bead compounds with LBKN-30H FWA BLACK 9225 is driven by shrinkage isotropy, moisture uptake, and chemical resistance rather than tensile strength. Glass-fiber PA12 with 30 wt% fiber provides higher dry tensile modulus, typically 6,000–7,500 MPa, and higher notched Charpy impact, often 12–15 kJ/m², but orientation-dependent shrinkage produces warpage in flat, annular, or thin-walled parts. The bead-filled grade is selected where roundness, flatness, and clearance dimensions must survive humid conditioning and moderate thermal cycling.
Compared with unfilled PA12, the glass-bead compound raises dry tensile stiffness by approximately 30–40 % and lowers mold shrinkage, but sacrifices ductility. Unlike PA66-GB30, the PA12 backbone offers a melting point approximately 80 °C lower and markedly lower water uptake. At 23 °C and 50 % relative humidity, equilibrium moisture uptake of the PA12 grade is approximately 0.5–0.7 %, compared with 1.3–1.8 % for PA66 and 2.5–3.5 % for PA6. Water-saturated linear dimensional change for PA12 is typically 0.3–0.5 %, whereas PA6 can exceed 1.0 %. This difference is relevant to water-meter housings, valve bodies, pump shells, and flow-regulating components that must retain thread engagement and O-ring groove dimensions after water exposure.
| Attribute | PA12-GB30 (LBKN-30H) | Unfilled PA12 | PA12-GF30 |
|---|---|---|---|
| Dry tensile modulus | 2,000–2,300 MPa | 1,500–1,700 MPa | 6,000–7,500 MPa |
| Notched Charpy at 23 °C | 5–7 kJ/m² | 8–10 kJ/m² | 12–15 kJ/m² |
| Flow/transverse shrinkage difference | 0.1–0.3 percentage points | Moderate | Often greater than 1.0 percentage point |
| Filler orientation in surface | Low, spherical filler | None | High, oriented fibers visible |
| Mold shrinkage, flow | 1.0–1.4 % | 1.5–2.0 % | 0.2–0.5 % |
| Creep under sustained load | Lower than unfilled PA12 | Higher | Lowest |
| Warpage tendency in flat parts | Low | Low-moderate | Moderate-high |
Regulatory status for this grade must be confirmed against the supplier’s current declaration. Under EU food-contact law, finished articles are evaluated under Regulation (EU) No 10/2011 using overall migration testing according to EN 1186-1, with a limit of 10 mg/dm² for plastic articles; the FWA designation does not itself waive component testing because processing aids, colorants, and molded surface-to-volume ratio influence migration. In the United States, polyamide 12 may be evaluated for repeated-use food contact under FDA 21 CFR 177.1500 if the specific resin, glass sizing, and carbon black carrier comply with the applicable listing and end-use conditions. Potable water contact components may require additional certification such as NSF/ANSI 61, WRAS, ACS, or DVGW W270, depending on market and final article geometry.
RoHS compliance with Directive 2011/65/EU and delegated amendments should be verified for cadmium, lead, mercury, hexavalent chromium, and brominated flame retardant restrictions; cadmium in colorants is a known audit point for black compounds. REACH obligations are determined by the supplier’s safety data sheet and candidate list disclosures; article producers must assess communication duties under Article 33 of Regulation (EC) No 1907/2006 if triggered.
The operational boundary for continuous load-bearing use in hot water is below 90 °C. Chlorinated potable water with high free-chlorine residuals at elevated temperature can degrade polyamide chains, and published life data for this specific compound in chloramine or chlorine dioxide service are limited. Concentrated sulfuric acid, formic acid, and halogenated solvents under molded-in stress should be avoided because environmental stress cracking may occur. At service temperatures below -40 °C, the glass beads reduce ductility relative to unfilled PA12; impact testing on the actual part is required if service approaches this limit. Black pigmentation also alters surface and volume resistivity, so black material should not be specified as an electrical insulator without measuring the molded component rather than relying on natural-grade electrical data.
