| HS Code | 796254 |
| Density | 1.34 g/cm³ |
| Glass Fiber Content | 30% |
| Tensile Strength | 90 MPa |
| Elongation At Break | 3% |
| Flexural Modulus | 7000 MPa |
| Charpy Impact Strength | 8 kJ/m² |
| Heat Deflection Temperature 1 8 Mpa | 160 °C |
| Melting Point | 178 °C |
| Coefficient Of Friction | 0.15 |
| Water Absorption 24h | 0.4% |
| Graphite Content | Lubricating Grade |
| Wear Rate | Low |
As an accredited LATI Latilub 82-05GR G/30 PA12, 30% Glass Fiber Reinforced, Graphite Filled factory, we enforce strict quality protocols—every batch undergoes rigorous testing to ensure consistent efficacy and safety standards.
| Packing | Supplied in sealed, moisture-proof polyethylene bags, each containing 25 kg of Latilub 82-05GR G/30 PA12 pellets, palletized for safe transport. |
| Container Loading (20′ FCL) | Twenty-foot FCL of LATI Latilub 82-05GR G/30 PA12, 30% glass fiber reinforced, graphite filled, in export packaging. |
| Shipping | LATI Latilub 82-05GR G/30 is a non-hazardous polyamide 12 compound in pellet form, reinforced with 30% glass fiber and graphite. Ship in clean, dry, sealed packaging. Avoid moisture, extreme heat, and dust generation. No dangerous goods classification; suitable for standard freight transport. |
| Storage | Store Latilub 82-05GR G/30 in its original sealed bag in a cool, dry, well-ventilated area away from direct sunlight, heat sources, and moisture. Keep containers tightly closed to prevent water absorption, which can degrade PA12. Avoid contamination with dust, chemicals, or foreign materials. Use within recommended shelf life, rotating stock first-in, first-out. |
| Shelf Life | Shelf life is typically 24 months from production date when stored in original, unopened packaging under dry, cool conditions. |
LATI Latilub 82-05GR G/30 is a 30 wt% glass fibre reinforced PA12 compound with graphite filler distributed as an internal solid lubricant. The grade is supplied as ready-to-mould pellets; no downstream additive masterbatch is required to obtain the specified dry-running friction and wear behaviour. The glass fibre content is determined by ISO 3451-1. The material class is described under ISO 1043-1 and ISO 1874-1 conventions as PA12-GF30 with graphite modification, though the formal designation requires the complete datasheet block. Pre-drying is required at 80 °C for 4–6 h in a dehumidifying dryer with a dew point of −30 °C when storage has exceeded 2 h at RH > 60%. Melt processing is normally performed at 240–260 °C, with mould temperature held at 50–80 °C depending on part thickness and dimensional tolerance. Mechanical validation uses ISO 527-2 tensile bars and ISO 178 flexural specimens, while melt flow can be checked by ISO 1133-1:2022. The glass fibre reinforcement introduces anisotropic shrinkage and weld-line sensitivity; tool design must place weld lines away from loaded gear flanks and bushing bores. No PTFE-based external lubricant is added; graphite serves as the solid lubricant. Compound-level compliance is evaluated under REACH 1907/2006 and RoHS 2011/65/EU; automotive applications additionally reference ELV 2000/53/EC heavy-metal restrictions. Finished-article compliance is application-specific and must be verified at the OEM level.
| Parameter | Standard/Test Method | Application Requirement |
|---|---|---|
| Glass fibre content | ISO 3451-1 | Nominal 30 wt%; controls creep and tooth stiffness |
| Tensile stress-strain | ISO 527-2/1A | Gear bodies, actuator racks |
| Flexural modulus | ISO 178 | Tooth bending resistance |
| HDT at 1.8 MPa | ISO 75-2 | Insert-bearing parts under load |
| Charpy notched impact | ISO 179-1/1eA | Impact-sensitive seat and actuator parts |
Within automotive seat adjuster transmissions, the worm wheel is subjected to low-speed, high-torque sliding at the tooth flank where regreasing is prevented by adjacent trim panels and electromagnetic clutches. The compound is used with 30 wt% glass fibre loading fixed by ISO 3451-1 and with graphite pre-compounded into the pellet; the only adjustment at the press is regrind let-down, which is limited to ≤15 wt% for worm wheels because repeated shear reduces fibre length and lowers tooth-root impact strength. The production process is injection molding with a central gate positioned away from the tooth ring to avoid a weld line at the root radius. Melt temperature is profiled at 245–260 °C, mould temperature at 60–80 °C, and holding pressure is applied until gate freeze to compensate for anisotropic shrinkage in the glass-filled grade. On production-scale toggle presses of 60–100 t, fill speeds below 80 mm/s are used to prevent jetting at the film gate; screw rotation is kept below 0.15 m/s peripheral speed to minimize fibre fracture. Compliance for this application is evaluated under IATF 16949:2016 through a full PPAP level 3 submission, with material declarations against REACH 1907/2006, RoHS 2011/65/EU, and ELV 2000/53/EC for heavy-metal limits. Finished terminal products include seat height-adjuster worm wheels, lumbar actuator gear hubs, window regulator rollers, and seat track sliding blocks.
A gear substitution from POM to glass-filled PA12-graphite in pneumatic rack-and-pinion actuators alters the wear mechanism from adhesive transfer to mild graphite transfer on the steel pinion shaft, but it also raises sensitivity to sharp corners at the tooth root because the 30 wt% glass fibre increases notch sensitivity. The formulation consists of 30 wt% glass fibre by ISO 3451-1 with graphite filler pre-dispersed by twin-screw compounding; no press-side powder graphite addition is permissible because it would create dust contamination in the air circuit. Regrind let-down is restricted to ≤10 wt% when the gear is used in actuator output shafts with pressure cycling. Processing is by injection molding with a heated sprue bushing and polished vent channels; melt temperature is held at 240–250 °C, mould temperature at 50–60 °C, and pack pressure is applied in two stages to reduce sink over the steel insert. Production-scale observation shows that insert preheating to 80 °C reduces hoop stress cracking around brass or stainless steel shafts. The relevant compliance framework includes ISO 8573-1:2010 class 3.4.3 for compressed air quality when the component sheds particles, plus REACH 1907/2006 and RoHS 2011/65/EU; if installed in potentially explosive atmospheres, ATEX 2014/34/EU ignition risk should be assessed. Terminal parts include helical pinion gears, rack piston gear strips, position indicator cams, and limit-switch cam discs. Published data for this specific configuration is limited for open-loop friction after 10⁶ cycles at 6 bar cycling, so validation should be performed with the specific counterface roughness and air dryness before design freeze.
Along dry-running packaging conveyor lines, chain guides, wear strips, and star wheels from this grade are produced where the absence of oil mist is required around optical inspection cameras. The glass fibre content is fixed at 30 wt% by ISO 3451-1; graphite is pre-compounded and no further filler addition is made at the extrusion line. Regrind from edge trim is allowed at ≤20 wt% if the profile is not machined after extrusion, because regrind from machined profiles can contain damaged glass fibre and increase surface wear against stainless steel chain pins. Production is by single-screw profile extrusion with a 24:1 L/D screw; a melt pump is recommended to control output, and melt temperature is held at 235–245 °C at the die. The extrudate is cooled in a water bath at 60–70 °C to reduce post-extrusion warpage. Compliance for machine integration is assessed under Machinery Directive 2006/42/EC, and the material supports REACH 1907/2006 and RoHS 2011/65/EU. These components are not direct food-contact articles; if used near unpackaged food, a barrier or risk assessment under EC 1935/2004 is required. Terminal finished product types include clip-on chain guides, wear strips, side rails, and star wheel segments.
Because PA12 has lower equilibrium moisture uptake than PA6 as tested under ISO 62, a change from 50% RH to 20% RH shifts surface hardness and dimensions less severely, but it can alter the coefficient of friction in high-cadence dobby mechanisms. In this application the compound is used with 30 wt% glass fibre by ISO 3451-1 and graphite pre-compounded; the addition of regrind is limited to ≤15 wt% because fibre length distribution affects cam lobe wear. Processing is injection molding with a centre-gated tool, melt temperature 245–255 °C, mould temperature 60–70 °C, and cycle time set to allow full crystallization at the cam lobe surface; ejection above 90 °C can induce post-mould warpage in thin-walled sectors. The industry standards applied are CE Machinery Directive 2006/42/EC for machine integration and REACH 1907/2006; textile-machine-specific fire safety may require additional testing according to the end-user's insurance specification. Terminal finished product types include rapier loom slider pads, dobby drive cams, tensioner rollers, and needle selector levers. Published data for this specific configuration is limited at high cadence, so wear screening should use a pin-on-disc configuration according to ASTM G99 with the actual counterface and fibre orientation.
Third-body wear from soil particles is the limiting variable in off-highway pivot joints, and the graphite filler reduces friction only when the counterface roughness does not exceed Rz 1.6 µm; above Rz 3.2 µm, hard quartz particles dominate the wear track and abrade both the polymer matrix and the glass fibres. The compound is specified with 30 wt% glass fibre by ISO 3451-1 and graphite pre-compounded; regrind let-down is limited to ≤10 wt% for thin-walled bushings because processing regrind increases the coefficient of variation in bore roundness. The downstream process is injection molding with wall thickness between 3 mm and 6 mm; melt temperature is held at 245–260 °C, mould temperature at 70–80 °C, and the tool is cored to produce an as-moulded bore that is not post-machined. Post-machining would cut surface glass fibres and produce exposed fibre ends that act as abrasive third bodies against the pin. Relevant compliance is REACH 1907/2006 and RoHS 2011/65/EU; the Machinery Directive 2006/42/EC applies to the complete machine, not the bushing itself. Terminal finished product types include linkage pivot bushings, chain tensioner blocks, hydraulic cylinder trunnion wear pads, and journal bearing collars.
Within household appliance drive trains, gear sets operate at low power but accumulate high numbers of reversals; the gear tooth root is the critical region because glass fibre orientation perpendicular to the root radius reduces flexural fatigue life. The material is supplied with 30 wt% glass fibre by ISO 3451-1 and graphite incorporated at compounding; regrind let-down is limited to ≤20 wt% only for non-safety, non-gear components such as cam spacers, while gear bodies use ≤10 wt% regrind to preserve tooth root strength. Processing is injection molding with a direct sprue gate into a generous flow leader; melt temperature is 245–255 °C, mould temperature is 60 °C, and the fill pattern is balanced to avoid weld lines in the tooth ring. The process produces parts without post-machining, and no external lubricant is applied; graphite transfer to the paired polymer or sintered metal gear is sufficient only if the tooth flank stress remains below the material's contact fatigue limit. Compliance for household appliances is assessed under IEC 60335-1 as part of the end-product safety evaluation, with material declarations against REACH 1907/2006 and RoHS 2011/65/EU. Terminal finished product types include washing machine transmission spur gears, dryer drum support cams, actuator rack gears, and timer cam wheels.
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LATILUB 82-05GR G/30 is an injection-moldable polyamide 12 compound modified with 30% by mass glass-fiber reinforcement and a graphite internal lubricant. The grade is produced within the Latilub self-lubricating family, where the 82-05 designation identifies the PA12 base and the G/30 suffix identifies nominal glass-fiber content. The graphite filler is incorporated for dry-running friction reduction, while the glass reinforcement provides elevated modulus, creep resistance, and dimensional stability under load. This combination is specified for load-bearing sliding parts in which metal-to-polymer contact occurs without continuous external lubrication. The material is supplied as cylindrical or lenticular pellets and is intended for injection molding. Because the exact lubricant package, stabilizer content, and filler-matrix coupling system are grade-specific, the current manufacturer’s technical data sheet and certificate of analysis remain normative. The engineering data below represent class-typical values for 30% glass-fiber-reinforced PA12 with graphite and are not a substitute for the grade-specific datasheet.
| Property | Test method | Typical engineering range | Units |
|---|---|---|---|
| Density | ISO 1183-1 | 1.25–1.30 | g/cm³ |
| Tensile modulus | ISO 527-1/-2 | 6000–9000 | MPa |
| Tensile strength at break | ISO 527-1/-2 | 80–120 | MPa |
| Tensile elongation at break | ISO 527-1/-2 | 2–4 | % |
| Flexural modulus | ISO 178 | 5500–8000 | MPa |
| Charpy notched impact, 23 °C | ISO 179-1/1eA | 6–10 | kJ/m² |
| Heat deflection temperature, 1.80 MPa | ISO 75-2 | 150–170 | °C |
| Vicat softening temperature, 50 °C/h, 50 N | ISO 306 | 160–175 | °C |
| Water absorption, 23 °C saturation | ISO 62 | 1.0–2.0 | % |
| Mold shrinkage, flow/transverse | ISO 294-4 | 0.3–0.6 / 0.7–1.0 | % |
The manufacturer’s grade-specific publication should be consulted for guaranteed minimum or maximum values. Lot-to-lot variation is controlled by raw-material quality, glass-fiber length distribution after compounding, graphite dispersion, and moisture state at molding. Incoming inspection should include ash content per ISO 3451-1, method A, at 650 °C to confirm glass content, and differential scanning calorimetry per ISO 11357-3 to confirm the PA12 melting peak and to detect contamination from other polyamides.
The graphite phase functions as a solid lubricant through lamellar shear. During initial sliding, graphite platelets transfer to the metallic counterface and form a low-shear film that reduces direct contact between the polymer matrix and the metal surface. In 30% glass-fiber-reinforced PA12, the glass fibers raise load-bearing capacity and reduce creep, while graphite lowers the probability of stick-slip, abrasive scoring, and thermally induced surface softening at the contact interface. Tribological characterization of this class is performed on hardened steel counterfaces with surface roughness in the 0.2–0.8 µm Ra range, using thrust-washer configurations per ASTM D3702-94 or pin-on-disk configurations per ASTM G99-17. The reported wear factor and coefficient of friction are not intrinsic material constants; they depend on pressure–velocity product, contact temperature, fiber orientation, weld-line location, counterface hardness, and debris evacuation. Published data for this specific configuration is limited. Designers should not substitute generic PA12 tribological data without performing end-use rig testing at the intended pressure–velocity and ambient temperature. Graphite-filled glass-reinforced PA12 grades generally exhibit lower wear factors than their non-lubricated glass-filled equivalents under boundary and dry-sliding conditions, but the reduction is not linear with graphite addition and may plateau above a formulation-dependent concentration. The glass fibers can act as a mating-surface abrasive if wear debris is not evacuated; clearance for debris removal or discontinuous sliding cycles should be included in bearing and cam designs.
Graphite also modifies electrical behavior. Unlike unfilled PA12, which is electrically insulating, graphite-filled grades can exhibit surface resistivity in the static-dissipative range when measured according to IEC 62631-3-2. The value depends on graphite content, dispersion quality, and surface preparation. This property requires verification for applications in which uncontrolled static discharge is a concern. The graphite filler does not guarantee full electrical conductivity across thick sections, and surface resistivity may vary with glass-fiber orientation and molded skin thickness.
Moisture control before melting is critical. PA12 absorbs less water than PA6 or PA66, but graphite-filled glass-reinforced compounds still require drying to prevent hydrolytic degradation and surface splay. Typical predrying practice for PA12-GF30 compounds uses desiccant dryers at 80 °C for 4–6 h to reduce moisture below 0.10%, with verification by Karl Fischer titration or a calibrated moisture analyzer. Melt preparation should be performed using a three-zone injection-molding screw with a non-return valve and hardened barrel and screw surfaces because the 30% glass-fiber reinforcement is abrasive. Screw L/D in the 18:1–22:1 range and a compression ratio of 2.0:1–2.5:1 are accepted for filled polyamide processing. Barrel temperatures for PA12 GF30 are typically profiled from 230 °C at the feed zone to 250–260 °C at the nozzle, with a melt temperature measured at the nozzle not exceeding 270 °C to limit polymer degradation. Tool temperature is normally maintained at 40–80 °C; below this range, surface deposition and weld-line weakness increase, while excessively high tool temperatures extend cycle time and promote post-demolding shrinkage. Injection speed should be medium to high, and hold pressure should be optimized using gate-seal studies on the actual mold. Glass-fiber orientation in the final part is determined by flow geometry and gate location. Tensile specimens cut parallel to flow show higher modulus than transverse cuts, and this anisotropy must be accounted for in part design. Wet polymer can generate visible splay and reduce weld-line strength; if moisture exposure occurs after drying, redrying is necessary before processing.
Substitution into existing molds requires reassessment of draft angles, weld-line placement, and shrinkage allowances. The graphite-containing variant does not behave identically to a non-lubricated 30% glass-filled PA12 in injection pressure requirements. Because graphite platelets change melt viscosity and thermal conductivity, cavity filling may require slightly different melt temperature or injection speed. Moldflow simulations should be calibrated using grade-specific melt rheology data generated by capillary rheometry per ISO 11443. Shrinkage is anisotropic and generally lower than unfilled PA12 but influenced by fiber orientation. Mold shrinkage values for this class are normally reported in the 0.3–0.6% flow direction and 0.7–1.0% transverse direction; these values are not universal and must be confirmed on the actual mold. In wear-intensive components such as automotive window regulator gears, textile cams, or industrial bearing cages, the graphite-filled grade is differentiated from non-lubricated glass-filled PA12 by reduced tendency to chatter or squeal against metal inserts and by lower wear factor at the same pressure–velocity. The material retains the high modulus and creep resistance of the glass-reinforced system, but the graphite may cause a measurable reduction in tensile strength and notched impact relative to a comparable 30% glass-filled PA12 without graphite, depending on the filler-matrix adhesion package. Replacement should be validated by tensile testing per ISO 527-1/-2, impact testing per ISO 179-1/1eA, and functional endurance testing under the intended load cycle.
PA12 has lower saturation water absorption than PA6 and PA66. The presence of 30% glass fiber reduces fractional moisture uptake because glass does not absorb water. Graphite does not contribute significant moisture uptake, so moisture-dependent mechanical changes in LATILUB 82-05GR G/30 are governed principally by the PA12 matrix. Dry-as-molded specimens exhibit higher modulus and lower impact toughness. After accelerated conditioning per ISO 1110 to equilibrium at 70 °C and 62% RH, impact toughness increases while stiffness decreases. Dimensional change from moisture absorption must be separated from molded-in and post-mold shrinkage. Annealing of molded or machined parts at 110–130 °C for 2–4 h can relax molded-in stress and stabilize dimensions for high-temperature service, but annealing can also increase crystallinity and cause additional small shrinkage. Parts requiring tight tolerances should be pre-conditioned before final inspection. The relevant dimensional tolerance standard for molded plastic parts is ISO 20457, with general tolerances for machined features defined by ISO 2768-1. Because graphite can leave a dark residue from wear or machining, cleaning processes should avoid strong acids and ketone immersion. Light mineral spirits or alkaline detergents are preferred, with verification of stress-crack resistance on test specimens before production use.
Typical assemblies for LATILUB 82-05GR G/30 include dry-running sliding bearings, clutch actuators, gear-shift components, and conveyor chain guides where mineral-oil-based greases are undesirable and where glass-reinforced PA12 provides creep resistance. The graphite addition enables dry-running starts and reduces stick-slip in slow incremental motion; the 30% glass reinforcement carries static loads and limits thermal expansion. The grade must not be assumed suitable for food-contact service unless explicitly covered by an EU 10/2011 migration compliance certificate. Many graphite-filled industrial compounds are supplied with industrial REACH and RoHS documentary compliance but not food-contact approval. The relevant regulatory documentation is EU 2011/65/EU for restricted substances and Regulation (EC) No 1907/2006 for SVHC disclosure. Flame behavior is not improved by graphite or glass; if a UL Yellow Card is required, the specific grade must be listed. Compliance must be confirmed by the manufacturer’s current certificate.
The combination of glass fiber and graphite creates a hard, abrasive surface that is less ductile than unfilled PA12. Bearing bores and sliding surfaces should be designed with generous radii, avoiding sharp corners that act as stress risers under impact. Fibrous orientation generates anisotropic mechanical properties: tensile properties measured parallel to flow are higher than those measured transverse, so structural features should be reviewed with flow direction from mold-filling analysis. Gate location should be selected to move weld lines away from high-load bearing surfaces. Weld-line strength in glass-fiber-reinforced PA12 is lower than base polymer strength, and graphite may not compensate for this reduction. Mating metal shafts should have surface roughness in the 0.2–0.8 µm Ra range and hardness above 50 HRC; lower hardness may cause adhesive transfer to the counterface. Press-fit assemblies should use insertion force calculations based on the material’s compressive modulus and service temperature, with allowance for moisture swelling. The coefficient of thermal expansion for glass-reinforced PA12 is anisotropic and lower than unfilled PA12, but still higher than steel or aluminum. Machining of near-net molded blanks is possible with carbide tooling, low cutting speeds, and adequate chip extraction. Machining can disrupt the molded surface layer and remove glass-fiber skin, altering wear behavior. If parts are machined from stock shapes, the resulting surface should be run-in with a controlled wear cycle or equilibrated under load before evaluating friction coefficient.
Shot-to-shot consistency in manufacturing depends on adequate hopper drying, screw-speed control, and hot-runner temperature uniformity. For hot-runner systems, the graphite filler can increase wear in manifolds and valve gates; hardened hot-runner components are specified. The material is normally processed without additional external lubricants. External oil or grease may contaminate the graphite transfer film and change wear behavior. The total addition of regrind should not exceed supplier-recommended levels, typically 20% by mass, because glass-fiber length and graphite distribution are altered by multiple melting histories and mechanical recycling.
