| HS Code | 392376 |
| Base Resin | Polyamide 12 (PA12) |
| Magnetic Filler | NdFeB (neodymium-iron-boron) |
| Density | 5.3 g/cm³ |
| Melting Point | 178 °C |
| Maximum Continuous Service Temperature | 100 °C |
| Water Absorption 24 H | 0.3 % |
| Tensile Strength | 50 MPa |
| Elongation At Break | 1.5 % |
| Flexural Modulus | 9000 MPa |
| Charpy Notched Impact Strength | 5 kJ/m² |
| Shore D Hardness | 85 |
| Residual Magnetic Flux Density Br | 0.75 T |
| Coercivity Hcb | 480 kA/m |
| Intrinsic Coercivity Hcj | 2070 kA/m (26 kOe) |
| Maximum Energy Product Bh Max | 103 kJ/m³ (13 MGOe) |
As an accredited Barlog Plastics KEBABLEND M 13/26 PA12 for Plastic Bonded Magnets factory, we enforce strict quality protocols—every batch undergoes rigorous testing to ensure consistent efficacy and safety standards.
| Packing | Supplied in 25 kg sealed polyethylene bags as uniform pellets, ready for plastic bonded magnet processing. |
| Container Loading (20′ FCL) | 20′ FCL loaded with palletized sealed bags of KEBABLEND M 13/26 PA12, secured, weight-optimized, ensuring safe transport of plastic-bonded magnet compound. |
| Shipping | Barlog Plastics KEBABLEND M 13/26 is a PA12-based compound for plastic-bonded magnets. Ship as non-hazardous, non-DG material in sealed, moisture-proof containers. Avoid excessive heat, humidity, and direct sunlight during transport. Standard industrial handling, no special temperature control required, but protect from physical damage and contamination. |
| Storage | Store in a cool, dry, well-ventilated area away from direct sunlight, heat sources, and ignition risks. Keep the original container tightly sealed to prevent moisture absorption and contamination. Avoid exposure to excessive humidity or extreme temperatures. Follow the manufacturer’s guidelines for shelf life and handle with clean, dry equipment to preserve material performance. |
| Shelf Life | Store in original sealed packaging, dry and cool. Shelf life is typically 12 months from date of delivery. |
Feedstock conditioning for KEBABLEND M 13/26 is dominated by the relationship between residual moisture, melt viscosity, and filler particle integrity. Published data for this specific grade is limited. The processing ranges that follow are drawn from industrial PA12-bonded ferrite practice and ISO test methods. The compound is pre-dried in a desiccant dryer at 80°C for 4–6 h. Target residual moisture is 0.08 wt% or lower. Moisture above this threshold hydrolyses the PA12 backbone inside the plastication unit. Viscosity drift modifies the shear transfer to the magnetic filler. Shot-to-shot variation increases. The result is inconsistent tool filling and lost remanence. A Karl Fischer titration according to ISO 15512:2019 is used as release control. The material must leave the dryer in sealed aluminium-lined sacks. Open transfer time is limited to 15 min at 50 % relative humidity or lower. This prevents re-absorption before the injection unit.
The compounding step is performed on a co-rotating twin-screw extruder with 40:1 L/D. The PA12 carrier is melted in the main feed section. Magnetizable filler is side-fed downstream of the melt seal. This limits thermal exposure. For anisotropic ferrite systems, the filler fraction is commonly held at 87–92 wt%. The PA12 binder fraction is 8–13 wt%. At binder fractions above 13 wt%, the magnetic remanence declines. At binder fractions below 8 wt%, thin-wall flow becomes unstable. Cavity pressure rises. Short-shot frequency increases. For isotropic NdFeB systems, binder fractions are typically 6–12 wt%. The filler loading must be selected with the final magnetisation level. The compounded granules are cooled in a water bath. Strand pelletising introduces fines. Fines must be screened below 1 mm. Oversized particles can block non-return valves. The final feedstock is packed in moisture-controlled containers. This is the foundation for sensor targets, encoder rings, rotor inserts, and magnetic drive couplings.
| Control variable | Industrial target for PA12-bonded ferrite | Test or equipment |
|---|---|---|
| Residual moisture | ≤0.08 wt% | ISO 15512:2019 Karl Fischer titration |
| Barrel temperature profile | 230–250°C | Injection moulding machine with hardened screw |
| Tool temperature | 40–80°C | Pressurised water mould temperature controller |
| Binder fraction for ferrite | 8–13 wt% | Thermogravimetric analysis ISO 11358-1 |
Automotive active wheel-speed sensor encoder rings present a process conflict between orientation field strength and melt pressure. The ring geometry is typically thin-walled. Wall thickness is commonly 2–4 mm. A radial multi-pole magnetic pattern is required. The ferrite particles must align in a defined vector before the PA12 freezes. The tool is fitted with SmCo or NdFeB pole pieces. These pole pieces generate the orientation field. The field lines must run parallel to the intended easy axis. A ring gate is used for this configuration. The gate delivers melt into the centre of the annulus. The flow front moves radially outward. The magnetic field is maintained during filling and early holding. If the injection speed is too low, the wall layer freezes before the filler aligns. The resulting remanence drops. If the injection speed is too high, adiabatic heating localises near the gate. Binder degradation occurs. The processing window is narrow. Melt temperature is kept at 235–250°C. Tool temperature is held at 60–80°C. A tool temperature controller with ≤ ±3°C deviation is required. The ferrite fraction is maintained at 88–91 wt% for active sensor targets. The PA12 binder fraction is 9–12 wt%. After ejection, the part is placed in a capacitor-discharge magnetising fixture. The fixture writes the 32–96-pole pattern into the ring. Residual magnetism is tested with a Helmholtz coil and integrating fluxmeter according to IEC 60404-8-1. Compliance in this segment is governed by IATF 16949:2016 traceability, ISO 11469 polymer marking, and REACH Article 33 communication. Terminal products are active ABS wheel-speed sensor encoder rings, passive tone wheels, and parking-brake actuator target wheels.
Rotor position sensor magnets for brushless direct current and permanent magnet synchronous motors use a PA12-bonded ferrite ring that is insert-moulded or bonded to a brass or stainless steel hub. The binder fraction is typically 8–12 wt% when ferrite is used. The remaining fraction is anisotropic ferrite. The insert is preheated to 60–80°C. The insert temperature must be uniform. A cold insert causes the melt to freeze before the orientation field can act. A hot insert can warp the hub. The cavity is filled through a three-point film gate. The gate placement avoids weld lines in the magnetic track. The melt is processed at 235–250°C. The tool is held at 50–70°C. Injection pressure is kept below 120 MPa where possible. Higher pressure increases orientation but also raises flash risk. The mould parting line must be maintained at a flash gap below 0.02 mm. The ferrite-filled compound is abrasive. Slide faces are nitrided or coated. Tool steel hardness above 55 HRC is specified. The magnetised part is validated for dimensional stability after vibration. Tests follow ISO 16750-3:2023 for mechanical loads and ISO 527-2:2012 for tensile properties. The terminal products are rotor position magnets for electric power steering motors, HVAC blower motors, seat adjustment motors, and brake vacuum pump motors. Published data for the exact KEBABLEND M 13/26 configuration is limited. The processing window must be confirmed on the production tool.
Industrial magnetic encoders use the same PA12-bonded ferrite feedstock in a different tolerance environment. The ring is typically overmoulded onto an aluminium hub. Hub roundness is controlled to 0.03 mm. The magnet ring is ground or laser-marked after moulding. Ferrite fraction in this segment is held at 86–90 wt%. The PA12 binder fraction is 10–14 wt%. The slightly higher binder fraction is used because encoder rings are thicker than automotive sensor rings. Flow length is therefore less critical. The binder increase lowers viscosity. It also reduces remanence slightly. The trade-off is acceptable for servo drive encoders because the magnetic track is magnetised with a lower pole width. Dimensional stability is checked by thermal cycling from -40°C to 120°C. The coefficient of linear thermal expansion is measured according to ISO 11359-2:1999. Magnetic output is measured on a Helmholtz coil according to IEC 60404-8-1. The terminal parts are rotary encoder rings for AGV wheel drives, servo motors, elevator door motors, and industrial robot joint encoders. RoHS compliance is verified by portable XRF screening against Directive 2011/65/EU Annex II substance limits. REACH obligations are managed through a supplier declaration. This segment is less demanding on orientation field strength than automotive multipole sensor rings. It is more sensitive to hub concentricity and axial runout.
Transmission output-shaft speed sensors expose the magnet to hot oil mist, metal wear debris, and vibration. The PA12 binder is selected for its oil resistance. The filler fraction is maintained at 87–90 wt%. The PA12 fraction is 10–13 wt%. The magnet ring is often overmoulded onto a steel carrier. The steel carrier is glass-bead blasted before moulding. The surface roughness is specified at Ra 2–5 µm. This provides mechanical anchoring. The melt is injected at 240°C. The tool temperature is held at 70°C. The gate is placed at the non-magnetic face. The magnetised face is kept free of witness lines. After moulding, the part is immersed in an ASTM oil at 150°C for 168 h. Mass change is measured according to ISO 175:2010. Hardness is checked according to ISO 7619-1:2010. Tensile strength is measured according to ASTM D638-14. The magnet must retain at least 90 % of its initial remanence after fluid ageing. The terminal products are automatic transmission output-shaft speed target wheels, dual-clutch transmission gear position sensor rings, and transfer case encoder magnets. IATF 16949 production part approval is mandatory for this segment. Dimensional testing is performed on a coordinate measuring machine. Magnetic pole counts are verified with a magnetovision scanner. The primary failure mode is not binder swelling. It is ferrite particle pull-out caused by abrasive debris in the oil. The PA12 binder must therefore be processed to maintain full encapsulation of the filler surface. A binder fraction below 10 wt% increases particle pull-out risk.
Magnetic couplings for sealless pumps use a PA12-bonded ferrite inner rotor. The magnet ring is encapsulated into a thermoset or thermoplastic impeller overmould. Ferrite fraction is held at 88–91 wt%. The PA12 binder fraction is 9–12 wt%. The rotor is injection-moulded with low-pressure filling. Low pressure protects the magnet ring from cracking. The tool is fitted with a dummy rotor shaft to maintain concentricity. Runout is controlled below 0.05 mm total indicator reading. The magnetised ring is tested in the intended fluid. Test fluids include ethylene glycol/water at 50 % concentration, inhibited demineralised water, and dilute acids. Fluid exposure is performed for 1,000 h at 80°C. Dimensional change is measured according to ISO 175:2010. Hydrolytic stability of the PA12 binder prevents rapid molecular weight loss. The terminal products are magnetic drive pump inner rotors for chemical metering pumps, coolant circulating pumps, aquarium pumps, and medical fluid actuators. If the application demands food contact, migration testing must be conducted under FDA 21 CFR 177.1500 or equivalent regional regulation. The specific KEBABLEND M 13/26 grade must be confirmed against the final food-contact formulation. RoHS and REACH declarations are required. The material is not inherently acceptable for implantable medical use. It is limited to actuator housings that are isolated from tissue contact. This segment requires a chemical compatibility matrix. The matrix links each pump fluid to the measured mass change, dimensional change, and retained remanence.
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Barlog Plastics KEBABLEND M 13/26 PA12 is a polyamide-12-based ready-to-mold compound developed for plastic-bonded magnet applications. The grade belongs to the KEBABLEND M series, in which a magnetic filler system is dispersed in a semicrystalline PA12 matrix. The alphanumeric suffix M 13/26 is a proprietary formulation identifier; no public standards document defines the two-number sequence, and the supplier’s lot-specific certificate of analysis should be consulted for the exact filler type, volume fraction, and particle-size distribution. Published data for this specific configuration is limited, but the relevant engineering envelope can be established from documented PA12 compounds with ferrite or rare-earth fillers used in sensor targets, encoder rings, actuators, and small motor rotors.
The PA12 binder is characterized by a crystalline melt peak between 175 °C and 180 °C when analyzed by differential scanning calorimetry according to ISO 11357-3. Unfilled PA12 density is typically 1.01 g/cm³ to 1.03 g/cm³ under ISO 1183-1; final magnet compound density rises with filler loading and is commonly reported in the range 3.1 g/cm³ to 4.8 g/cm³ depending on whether strontium ferrite or rare-earth powder is used. Melt volume-flow rate, measured under ISO 1133-1:2022, is strongly influenced by filler volume fraction; for magnet compounds of this class it is often set between 5 cm³/10 min and 30 cm³/10 min at 275 °C with 2.16 kg, but the exact M 13/26 value must be confirmed from the producer datasheet.
Because the exact filler type is not declared in public literature for M 13/26, the product should be specified only after review of the current Barlog Plastics technical datasheet. The grade is positioned as a lower-moisture-uptake binder alternative to PA6 and a lower-processing-temperature alternative to PPS in injection-molded magnet holders and encoder targets.
Pre-drying of KEBABLEND M 13/26 PA12 should be performed in a desiccant dryer with a dew point no higher than -40 °C. Residual moisture must be reduced below 0.10% by weight before melt processing, typically by drying at 80 °C for 4 h to 8 h. Moisture content can be verified by ISO 15512:2019. If the material is exposed to uncontrolled humidity above 60% RH, drying must be repeated because PA12 absorbs water at a measurable rate and hydrolysis during high-temperature molding reduces molecular weight and magnetic filler bonding.
Melt temperature is normally maintained between 230 °C and 250 °C at the nozzle, with rear zones 20 K to 30 K lower to avoid premature shear heating. The upper melt-temperature limit is 280 °C; residence time above that threshold should not exceed 5 min to avoid chain scission. Mold temperature is held between 40 °C and 80 °C to balance crystallization rate and dimensional stability. Higher mold temperatures improve melt-front fusion and reduce orientation stress, but raise cycle time and require closed-loop mold-temperature units capable of maintaining ±2 °C uniformity.
Injection speed should be moderate to high, but local shear rates should not exceed 105 s-1 in the gate or thin-wall sections. Excessive shear promotes viscous heating and can separate the magnetic filler from the PA12 carrier, causing anisotropic property drift and flow lines. Gates should be positioned to allow parallel melt-front advance and prevent jetting; wall thickness below 1.0 mm can freeze before magnetic orientation is complete, while sections above 4.0 mm can cause sink marks and anisotropic shrinkage measured by ISO 294-4.
Molding equipment should use a three-zone screw with a compression ratio of 1.5:1 to 2.0:1, fitted with a wear-resistant check ring. Production-scale experience with PA12-based magnet compounds shows that ferrite and rare-earth fillers are abrasive; nitrided or bimetallic barrels and screw tips reduce barrel wear over batches exceeding 50,000 cycles. Clamp force is selected by projected area and cavity pressure, with machines from 800 kN to 3,500 kN commonly used for automotive sensor and rotor components.
In magnet compounds of this class, the filler volume fraction dominates viscosity. Ferrite-filled systems commonly contain 80 wt% to 92 wt% magnetic filler, and the melt viscosity can be 2 to 5 times higher than unfilled PA12 at equivalent shear rates. Apparent shear viscosity should be measured by capillary rheometry according to ISO 11443; at shear rates between 100 s-1 and 1,000 s-1 the material typically exhibits shear-thinning and can fill thin sensor housings if the gate diameter is not below 1.2 mm.
Magnetic and mechanical characterization of bonded magnet compounds of this class is normally performed after molding and magnetizing. Tensile properties are evaluated according to ISO 527-1/-2; flexural modulus according to ISO 178; Charpy impact, notched, according to ISO 179-1/1eA. Reported values for PA12-based ferrite-filled grades often fall within tensile strength 40 MPa to 70 MPa and flexural modulus 4 GPa to 8 GPa, while rare-earth-filled systems can exceed 10 GPa in flexural modulus. These ranges are class-typical, not lot-specific; M 13/26 values should be confirmed against the manufacturer’s certificate of analysis.
Magnetic properties are measured with a hysteresisgraph or fluxmeter according to IEC 60404-8-1 on magnetized specimens. Anisotropic grades are processed in an alignment field during cavity filling, so remanence and coercivity depend on the magnetizing fixture design and the orientation of the applied field. Without a declared filler system for M 13/26, published data for this specific configuration is limited. The design target for sensor and encoder applications is typically a remanence of 200 mT to 300 mT for ferrite-filled PA12 and 500 mT to 800 mT for rare-earth-filled PA12, but the values must be verified with the actual magnetization equipment.
Binder selection changes the moisture uptake, processing window, and dimensional stability of the final magnet. The following comparative values are drawn from published polyamide and PPS datasheets, not from the exact M 13/26 formulation.
| Property | Test method | PA12 binder | PA6 binder | PPS binder |
|---|---|---|---|---|
| Melting peak, °C | ISO 11357-3 | 175–180 | 220–225 | 280–285 |
| Equilibrium water absorption, % | ISO 62 | 1.5–2.0 | 9.0–10.0 | <0.05 |
| Unfilled density, g/cm³ | ISO 1183-1 | 1.01–1.03 | 1.13–1.15 | 1.34–1.36 |
| Typical melt processing window, °C | Producer data | 230–250 | 240–280 | 300–340 |
| Typical mold temperature, °C | Producer data | 40–80 | 80–100 | 120–160 |
| Tensile modulus, unfilled, GPa | ISO 527-1/-2 | 1.3–1.6 | 2.5–3.5 | 3.8–4.2 |
The PA12 binder has lower saturated water absorption than PA6 by roughly 7 to 8 percentage points, which reduces hygroscopic growth in humid engine-bay or pump environments. Compared with PPS, the PA12 melt window is approximately 60 °C to 90 °C lower, lowering energy demand and allowing faster molding cycles without requiring high-temperature oil-heated molds. The lower PA12 density also yields lighter parts than PPS at equal filler loading, but PPS retains higher continuous-use temperature and better creep resistance in high-temperature actuators.
In production-scale molding of PA12-based bonded magnets, the main process conflicts are abrasive tool wear, filler orientation drift, and batch-to-batch filler particle-size variation. Compounding is typically carried out on a co-rotating twin-screw extruder with an L/D ratio between 36:1 and 48:1; the magnetic filler is side-fed into a downstream barrel zone after the PA12 has melted, and vacuum venting reduces volatiles. Intensive kneading blocks should be limited because excessive screw work can crush brittle ferrite particles and shift the particle-size distribution, which alters both magnetic alignment and melt viscosity.
Applications for this product include wheel-speed sensor targets, ABS encoder rings, camshaft and crankshaft position sensors, throttle-position magnet carriers, stepper motor rotors, magnetic couplings, and pump impellers. In wheel-speed sensors, the encoder ring must maintain consistent tooth-to-tooth magnetic field amplitude under ISO 16750-4 thermal cycling and salt-spray exposure; PA12’s lower moisture uptake compared with PA6 reduces dimensional distortion that can change the air gap. The grade may also be used in magnetic encoder disks for industrial automation, where edge flatness and runout under rotation are measured on coordinate measuring machines after molding.
After molding, parts are magnetized with a capacitor-discharge magnetizer. For ferrite-filled PA12, saturation fields of 1.0 T to 1.5 T are commonly used; for rare-earth-filled PA12, fields above 3.0 T are required. The fixture should be designed to orient poles radially or multipole according to the final sensor output. In anisotropic grades, any melt-flow hesitation before the cavity fills can freeze a partially aligned region, producing local remanence drop that is detectable only by pole-by-pole flux mapping.
When the application is exposed to intermittent moisture, oil, and temperatures below 120 °C, PA12-bonded magnet compounds are often selected instead of PA6 or PPS. The processing window of 230 °C to 250 °C is compatible with standard water- or oil-heated molds, so line retrofits are less expensive than PPS tooling. The main limitation is continuous heat resistance: PA12 is not rated for continuous use above approximately 120 °C in loaded magnetic assemblies; tests according to ISO 2578 should define the actual temperature index for the specific M 13/26 formulation.
Regulatory status should be verified from the supplier’s documentation. Compounds of this type are generally formulated to meet the hazardous-substance restrictions of RoHS Directive 2011/65/EU Annex II and the registration obligations of REACH Regulation (EC) No 1907/2006. However, compliance is lot-dependent and must be confirmed through the material’s REACH declaration. Storage should be in sealed bags below 30 °C and 60% RH; opened containers must be dried again before use. The material should not be melt-blended with polyamide-incompatible acidic or strongly basic additives that can accelerate chain scission at processing temperatures above 260 °C.
