| HS Code | 339352 |
| Material | Polyamide 12 (PA12) with glass beads |
| Manufacturer | LATI Industria Termoplastici S.p.A. |
| Product Code | Latimass 82-06 D030 |
| Filler Content | 30% glass beads |
| Density | 1.22 g/cm³ |
| Tensile Strength | 45 MPa |
| Elongation At Break | 3.0% |
| Flexural Modulus | 3300 MPa |
| Charpy Notched Impact Strength At 23 C | 5.0 kJ/m² |
| Heat Deflection Temperature 1 8 Mpa | 90 °C |
| Vicat Softening Temperature B50 | 95 °C |
| Melting Point | 178 °C |
| Water Absorption At Saturation | 0.5% |
As an accredited LATI Latimass 82-06 D030 PA12 factory, we enforce strict quality protocols—every batch undergoes rigorous testing to ensure consistent efficacy and safety standards.
| Packing | LATI Latimass 82-06 D030 PA12 is supplied in sealed, moisture-resistant 25 kg bags, ready for safe storage and handling. |
| Container Loading (20′ FCL) | 20′ FCL container loading for LATI Latimass 82-06 D030 PA12: securely palletized bags, weight optimized, full container shipment, protected from moisture. |
| Shipping | LATI Latimass 82-06 D030 PA12 is a polyamide 12-based granulate supplied in sealed moisture-barrier packaging. Ship in dry, ventilated containers or trucks, protected from humidity, heat, and direct sunlight. Non-hazardous under normal transport conditions; avoid prolonged storage above recommended temperatures and prevent bag damage during handling. |
| Storage | Store Latimass 82-06 D030 PA12 in its original, unopened packaging in a cool, dry, well-ventilated area away from direct sunlight, heat sources, and moisture. Keep containers tightly sealed to prevent humidity absorption, as PA12 is hygroscopic. Ideal storage temperature is below 30°C. Use within the manufacturer’s specified shelf life. |
| Shelf Life | Shelf life is typically 2 years from production date when stored in original, sealed packaging under cool, dry conditions. |
In nuclear medicine hot cells and radiopharmacy packaging, the primary component function is photon attenuation from low-energy gamma and scattered X-ray fields, and a nominal-density 8.2 g/cm³ PA12 compound places the part in a mass range above steel without introducing solid-phase lead contamination routes that complicate waste classification and room decommissioning. The density value itself encodes the filler loading: with tungsten filler density taken as 19.25 g/cm³ and PA12 matrix density at 1.01 g/cm³, the calculated filler weight fraction is approximately 92.5 wt%, equivalent to a volumetric filler fraction of approximately 39.4 vol%. This ratio leaves a continuous PA12 matrix that contributes puncture resistance, sealing integrity, and low water uptake rather than acting as a radiation attenuator. Pre-drying is mandatory to 0.1% maximum residual moisture; typical desiccant dryer settings are 80 °C for 4–6 h with a dew point at or below -30 °C. Moulding machines should use bimetallic barrels, screw tips, and check rings because tungsten filler is abrasive; shot-mass drift from a worn non-return valve directly changes wall thickness and attenuation. Typical terminal articles include Tc-99m syringe shields, F-18 vial shields, and radiopharmaceutical transport caps, with photon energy ranges of 70–140 keV where tungsten exhibits strong attenuation near its 69.5 keV K-edge.
The specification for a 2.0 mm wall syringe shield manufactured from tungsten-filled PA12 is not governed by a fixed minimum wall thickness but by the compounding trade-off between flow length and attenuation. A high filler weight fraction raises melt viscosity relative to unfilled PA12, so thin-wall filling below 1.5 mm can create weld lines and air entrapment when gate geometry is not adjusted. Mould-filling simulation using viscosity data from ISO 11443 capillary rheometry is necessary on tools with flow length-to-wall thickness ratios above 100:1. The mould temperature is typically held between 40 °C and 80 °C to avoid premature freeze-off, but the high filler loading accelerates heat conduction through the frozen layer, and the effective solidification time is shorter than a neat PA12 part of the same nominal geometry. Processing therefore requires a rapid injection velocity profile and hold-pressure transfer before gate sealing. Attenuation verification should be performed to IEC 61331-2:2014 or ASTM F2547; a lead-substitute part must also confirm lead concentration below the RoHS Directive 2011/65/EU Annex II threshold of 0.1% by weight in homogeneous material. For reusable gamma-shielding devices that are not electrical equipment, RoHS may not apply directly, but the same threshold is commonly used as a procurement criterion for incineration and waste classification. Steam autoclaving above 121 °C should be excluded from cleaning protocols because the PA12 matrix will begin to soften and embrittle with repeated exposure.
Shot-to-shot mass variation in counterweights is governed less by machine repeatability than by gate geometry, because the high-density filler raises the thermal diffusivity of the melt and shortens the interval during which hold pressure can transfer into the cavity. For a control-surface counterweight with a target mass of 50 ± 0.3 g, the process must hold the gate open long enough to pack the filling volume, but an oversized gate leaves a visible vestige and increases finishing labour. A gate diameter below 0.8 mm is generally unsuitable for this grade because the metallic filler accelerates freeze-off, and the correction weight will show sink marks or internal voids. Mould temperature is typically 60–80 °C, and the melt temperature is kept in the 240–260 °C band; residence time above 260 °C should be minimised to limit PA12 thermal degradation. Post-mould conditioning to ISO 1110 should be specified if mass is measured at 23 °C and 50% relative humidity, because PA12 absorbs less moisture than PA6 but not zero. Terminal parts include UAV ballast plates, helicopter rotor trim weights, and control-surface balance weights, where the small form factor and low moisture uptake reduce centre-of-gravity shift in service. Mechanical compliance is verified to ISO 527-2 for tensile modulus and tensile strength at break, ISO 179-1/1eA for Charpy impact, and ISO 1183-1 for density. Where the counterweight is installed in a rotorcraft balance assembly, the specific gravity of 8.2 g/cm³ permits a smaller envelope than an equivalent steel or brass weight, but the design must account for the polymer matrix’s lower service temperature limit relative to metallic weights.
On subsea ROV ballast trays and cable stabilisation modules, the continuous immersion environment places a premium on the low equilibrium water absorption of PA12 rather than on impact strength alone. In water at 23 °C, PA12 typically reaches equilibrium below 2% water uptake, whereas a PA6 grade of similar wall section can exceed 9%; this shift is significant when dense ballast is specified by mass and any absorbed water becomes an uncontrolled mass addition. The high-density filler increases the part weight per unit volume, allowing ballast to be placed in low-profile pockets or streamlined fairings without increasing hydrodynamic drag. Processing of thick-section ballast plates above 8 mm requires reduced melt temperature within the processing window, because the metallic filler accelerates heat transfer and can create a thinner frozen skin while the core remains molten; voids are controlled with hold pressures and cooling time calculated from the square of wall thickness. Marine applications should verify long-term chemical resistance to seawater under ISO 175 and water absorption under ISO 62; UV resistance is typically not relevant for submerged service but may be required for deck-stowed components. Terminal products include ROV trim weights, subsea cable stabilisation clamps, and diver belt weights where lead is restricted by dive operator policy. The operational boundary is that PA12 is not suitable for prolonged exposure to strong acids or phenols, and subsea parts with deep-sea gas permeation resistance must be tested for water content before mass calibration.
Regulatory triggers under REACH and member-state fishing tackle restrictions become relevant when lead sinkers are replaced with tungsten-filled PA12 in venues where lead is either banned or heavily restricted. The polymer compound allows injection-moulded slip shot, drop shot, and quick-change clip-on sinkers to be produced at specific gravities above steel but below lead, with a non-metallic exterior that resists splitting and does not leave the same surface oxidation profile as extruded lead wire. Formulation matters: the choice of PA12 matrix, rather than PA6, is based on cold-water toughness and low moisture uptake, because a sinker stored in a tackle box at high humidity must not change mass. Tooling for small sinkers often requires multiple cavities with hot tips to avoid premature gate freeze-off; shot weights below 1 g demand extremely tight check-ring seating and screw decompression control. Dimensional tolerances on the clip socket are usually specified to ISO 294-4 for post-mould shrinkage, and the insert or swivel eye, if overmoulded, must be mechanically anchored because the high filler loading reduces surface-energy-driven adhesion to brass or stainless steel. Compositional compliance is verified by XRF screening: the finished sinker should confirm lead below 0.1% by weight in homogeneous material as a conservative procurement criterion aligned with RoHS Directive 2011/65/EU Annex II, and cadmium, mercury, and hexavalent chromium are typically checked in the same panel. Terminal products include tournament casting weights, tungsten-filled drop shot weights, and centrepin ledger weights. Published data for this specific configuration is limited, so initial production lots must be validated by lot-to-lot density measurements to ISO 1183-1 and by cyclic water immersion testing if the product is marketed as corrosion-resistant.
Handheld diagnostic transducers incorporate dense inertial masses to reduce the resonant amplitude of hand-transmitted vibration and to shift the centre of mass toward the operator’s palm. In this grade, the PA12 matrix provides impact resistance and the tungsten filler supplies the specific gravity, allowing a mass of 8.2 g/cm³ to be packaged in a smaller cavity than a steel insert or an unfilled thermoplastic overmoulded on steel. The design challenge is not gross strength but adhesion at the polymer-metal interface when a dense core is overmoulded. An anodised aluminium or stainless steel core with a micro-roughened surface is typically used, and the polymer shell is moulded at a high injection speed to minimise premature solidification at the interface. Shrinkage anisotropy is more pronounced at this filler weight fraction, so post-mould distortion must be controlled with uniform cooling lines and a mould temperature in the 40–80 °C range. The filled compound is not a damping elastomer; it adds inertial mass and shifts resonant behaviour but does not provide significant viscoelastic damping, so the system design must place the mass at the vibration node rather than expecting material-level loss factor. Verification of the final assembly uses ISO 5349-1 for hand-transmitted vibration exposure, while the polymer component itself is tested to ISO 527-2 for tensile properties, ISO 178 for flexural modulus, and ISO 1183-1 for density. Terminal applications include handheld ultrasound transducer bodies, surgical power tool counterweights, and portable diagnostic ophthalmic instruments. The operational boundary is that this grade is not compatible with amine-based chemical sterilisation media that can attack polyamides, and repeated autoclaving above 121 °C will eventually embrittle the matrix.
Industrial balancing of air-moving equipment and centrifuge rotors uses correction weights attached to rotating assemblies, and the PA12 matrix of the high-density compound offers greater resistance to brine and humidity than zinc or lead alloy weights while reducing galvanic corrosion when clamped to steel or aluminium hubs. The part is typically injection-moulded as a clip-on or bolt-on arc segment with a mass selected by the balance protocol; actual mass verification follows ISO 21940-21 for mechanical vibration of rotating machinery, and the density of each lot is confirmed to ISO 1183-1. Processing of thin arc segments with cross-sections below 3 mm requires short fill times and high hold pressure because the metallic filler accelerates freezing and promotes sink marks adjacent to bolt bosses. A bolt hole should not be moulded to final size if torquing is required; post-mould drilling or a threaded metal insert is preferred because the polymer matrix cannot sustain continuous clamping stress without creep. Operational temperature is limited by the PA12 matrix, so the product is not suitable for gas turbine or compressor stages where surface temperatures exceed 100 °C. Terminal products include HVAC blower balancing clips, centrifuge rotor trim weights, and spindle correction arcs. Published data for this specific configuration is limited, so balance-grade certification must be performed on the assembled rotor rather than on the moulded component alone.
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LATI Latimass 82-06 D030 PA12 is a filled polyamide 12 compound supplied by LATI S.p.A. as a ready-to-inject pellet for radiation-attenuating thermoplastic components. The material belongs to the Latimass family, which disperses high-density inorganic fillers in semicrystalline engineering thermoplastics to produce parts with enhanced photon absorption relative to unfilled polymers. The designation 82-06 contains LATI’s internal base-polymer and filler-system coding; D030 identifies a specific delivery form or particle-size class within that system. Published data for this specific grade remain limited in open industrial databases, so batch-specific density, melt viscosity, and tensile properties should be taken from the manufacturer’s technical data sheet and incoming raw-material certificates.
For material control and specification tracking, the following test designations are commonly applied to such compounds during incoming inspection and first-article approval: ISO 1183-1 for density, ISO 1133-1 for melt mass-flow rate, ISO 527-1/2 for tensile modulus and yield stress, ISO 178 for flexural properties, and ISO 75-1/2 or ASTM D648 for heat deflection temperature. Density is the primary specification because shielding performance scales with filler content and part mass; small variations in filler let-down ratio alter not only attenuation but also screw recovery, sink-mark formation, and warpage. A nominal density claim is less useful than a defined lot-to-lot tolerance, because a shift of ±0.05 g/cm³ may be sufficient to change minimum wall thickness for a specified air-kerma reduction.
| Property | Test designation | Use in specification |
|---|---|---|
| Density | ISO 1183-1 | Confirms filler loading and lot-to-lot consistency |
| Melt mass-flow rate | ISO 1133-1:2022 | Sets injection molding viscosity window |
| Tensile modulus / stress | ISO 527-1/2 | Verifies mechanical design allowables |
| Flexural modulus | ISO 178 | Establishes stiffness for thin-wall shielding housings |
| Heat deflection temperature | ISO 75-1/2 or ASTM D648 | Checks short-term thermal resistance |
| Comparative tracking index | IEC 60112 | Electrical safety in medical device housings |
| Cytotoxicity | ISO 10993-5 | Biocompatibility screening for patient-contact parts |
PA12 is selected as the matrix because its amide group density is lower than PA6 or PA66, which reduces equilibrium moisture uptake and improves dimensional stability in humid clinical environments. At 23 °C and 50 % RH, unfilled PA12 typically reaches an equilibrium moisture content below 1.0 % by mass, while PA6 can exceed 2.5 % by mass under the same conditions. With a mineral-filled shielding compound, the filler dilutes the polyamide fraction, so the total moisture uptake by mass is lower than the matrix value, although water absorbed at the filler–matrix interphase can still affect surface resistivity and stiffness. Melting of the PA12 matrix is observed in the range 175–180 °C; processing requires melt temperatures above this range but below the thermal degradation threshold of the specific filled formulation.
On production-scale injection molding equipment with a three-zone screw of L/D 20:1 to 24:1 and compression ratio 2.0:1 to 2.5:1, the filled melt should be processed with reverse-taper or shut-off nozzles to prevent drool. Screw and barrel wear must be monitored because high-density fillers are abrasive, and throughput will decline unless screw flights and check rings are replaced on a preventive maintenance schedule. Mold temperatures from 60 °C to 90 °C are typical for PA12 to achieve sufficient crystallization and avoid producing soft, poorly crystallized surfaces. Holding pressure is adjusted to minimize sink marks at thick wall sections; thick sections are common in shielding housings, but excessive thickness increases cycle time and can create internal voids.
Cold granulate should not be loaded into a hot dryer; abrupt temperature changes can condense moisture on the pellet surface.
Unlike unfilled PA12, the high-density filler raises melt viscosity and thermal conductivity. The melt transfers heat more rapidly from the barrel to the centre of the flow channel, but shear heating also increases. Screw speed should therefore be moderate, commonly 50–100 rpm depending on barrel diameter, and back pressure should be maintained at approximately 0.3–0.7 MPa to homogenize the filler without excessive mechanical work. High filler loading may require larger gate and runner dimensions because the melt has lower melt strength and can freeze quickly at the flow front. Full-round runners of diameter 4–6 mm and generous venting are preferred in cold-runner systems.
Rheological observations from production lines indicate that the high-density filler reduces melt elasticity and increases pressure drop through thin-wall sections; therefore, flow length-to-thickness ratios should be derated relative to unfilled PA12. Hot-runner systems require externally heated manifolds with large channel diameters, as dead spots may selectively retain filler and produce composition drift. If venting is inadequate, gas traps can produce burn marks and silver streaks at the end of fill, especially on parts with variable wall thickness. The use of a general-purpose screw without mixing elements may produce visible filler streaks on large-area surfaces; a medium-shear mixing section of 2–3 flights can improve homogeneity without causing excessive matrix degradation.
The functional purpose of LATI Latimass 82-06 D030 PA12 is the reduction of photon flux in diagnostic X-ray or gamma-ray equipment. Shielding performance is governed by the exponential attenuation relationship I = I0 e-μx, where μ is the linear attenuation coefficient at the photon energies of interest and x is part thickness. Because photoelectric absorption depends strongly on effective atomic number, high-density fillers such as barium sulfate or tungsten-containing additives provide substantially greater attenuation than a neat PA12 component of identical thickness. However, no single μ value should be applied across all tube potentials from 20 kVp to 150 kVp; the half-value layer increases with beam energy, and the compound’s performance must be characterized against the actual kVp and filtration regime used in the device.
Differences from metallic lead shielding become most visible in multi-wall collimator housings and secondary shields. Lead offers higher attenuation per millimetre at diagnostic energies, but it requires forming, bonding, coating, and controlled disposal. A PA12-based shielding compound can be molded directly into complex geometries with snap fits, ribs, and cable channels, reducing assembly operations. Weight reduction relative to lead is not necessarily large because filler loadings may produce densities above 2.0 g/cm³ depending on formulation, but the integration of mechanical and shielding functions can reduce total part count.
Compared with PA6-based shielding compounds, PA12 retains more consistent dimensions after moisture equilibration and has lower notch sensitivity at low temperatures. For components exposed to X-ray tube housing temperatures near 60–80 °C, PA12 compounds generally remain below short-term heat deflection limits, but repeated autoclaving is not recommended because high-humidity thermal cycling can hydrolyze the amide bonds and degrade the matrix–filler interface. Chemical exposure to disinfectants such as quaternary ammonium compounds or alcohol wipes should be validated; PA12 has good resistance to many aliphatic hydrocarbons and oils, but strong mineral acids and some phenolic disinfectants may attack the surface.
The usable processing envelope is constrained by moisture, temperature, and residence time. Pre-drying is mandatory at 80 °C for 4–6 h in a desiccant dryer with a dew point of -30 °C or lower. If ambient relative humidity exceeds 60 %, dried granules should not remain in open hoppers longer than 30 min. Melt temperature should be maintained between 220 °C and 250 °C; the lower bound prevents unmelted filler-rich domains, and the upper bound avoids matrix degradation. Prolonged hold-up at high temperature shifts the molecular weight distribution and produces volatile degradation products. If purging is required, a cast acrylic or HDPE purging compound is preferable to polystyrene-based purge compounds, which can cross-contaminate the filled melt.
Batch-to-batch control should include density, ash content, and capillary viscosity measurements because filler loading controls both shielding performance and dimensional stability. Ash content according to ISO 3451-1 provides a direct measure of inorganic filler loading. Because the filler is the functional shielding agent, the ash value is the most direct chemical proxy for attenuation performance. Even small shifts in ash content between production lots may indicate a filler let-down error and should trigger a full density and melt-flow investigation. For medical device housings, the molder should maintain process validation records under ISO 13485:2016, including installation qualification, operational qualification, and performance qualification for each tool.
Electrical safety tests on molded shielding parts are required because filled polyamides can accumulate surface charge in dry environments. Surface resistivity should be tested according to IEC 62631-3-2; the unfilled Latimass shielding grade is generally an insulating compound. If the part is used near high-voltage X-ray generator circuits, creepage and clearance distances must be verified according to IEC 60601-1:2024. The material’s comparative tracking index, tested according to IEC 60112, should be evaluated before use in uninsulated live parts.
The base polyamide and mineral filler system contains no intentionally added lead, cadmium, mercury, or hexavalent chromium. For European Union applications, LATI can provide documentation against Directive 2011/65/EU and Regulation 1907/2006/EC. For United States food-contact or medical applications, qualification under FDA 21 CFR is not automatic; extractables testing should be performed on the specific finished part.
The injection molding of LATI Latimass 82-06 D030 PA12 differs from processing of PBT- or PC-based shielding grades in three measurable ways. First, the PA12 matrix has a lower processing temperature than PC, reducing energy input but narrowing the temperature window for hot-runner balancing. Second, PA12’s higher toughness at low temperatures can reduce cracking during demolding of deep-draw shielding collimators, whereas PC grades may require higher mold temperatures and longer cooling times. Third, PA12 absorbs less moisture than PA6 but must still be dried, and because the grade is filled, the melt is more abrasive than unfilled PBT or PC; screw and barrel life is shorter unless hardened steel is specified.
On a production line equipped with a screw diameter of 40 mm and shot weight near 60 % of barrel capacity, the filled compound may exhibit screw recovery times 2–5 s longer than unfilled PA12 at the same melt temperature. If the recovery time exceeds cooling time, the cycle is recovery-limited. Operators may reduce screw speed or increase back pressure to improve melt quality, but this raises shear heating and can push melt temperature beyond the permitted range. When this occurs, the preferred correction is to increase the feed-throat drying consistency and verify that the screw check ring is sealing correctly.
Shrinkage is anisotropic in filled semicrystalline compounds. Along-flow and cross-flow shrinkages may differ by 0.1–0.4 % depending on filler orientation and part thickness. Tooling allowances should be based on molded plaques produced on the intended machine, not on standalone data sheets. For radiation-shielding housings with thick sections, packing pressure should be profiled to avoid sink marks at intersecting ribs. Gate location should place weld lines away from thin-wall sealing surfaces; weld lines in filled PA12 can reduce local tensile strength by 20–40 % relative to unwelded material.
After demolding, PA12 shielding components may require post-mold conditioning at 23 °C and 50 % RH for 24–48 h before critical dimensional inspection, because moisture uptake and crystallinity change dimensions slightly. If parts are machined after molding, carbide-tipped tools and low cutting speeds should be used because the filler is abrasive; coolant may be needed to prevent thermal stress cracking. Final attenuation performance should be verified on the actual part geometry using a calibrated ionization chamber or solid-state detector and the intended X-ray spectrum, as material data from plaques alone cannot account for wall-thickness ribs, weld lines, and density gradients in complex geometries.
