| HS Code | 814709 |
| Density | 1.06 g/cm³ |
| Tensile Modulus | 2100 MPa |
| Tensile Stress At Yield | 55 MPa |
| Tensile Strain At Yield | 5 % |
| Tensile Strain At Break | >50 % |
| Charpy Impact Strength Unnotched 23 C | no break |
| Charpy Notched Impact Strength 23 C | 15 kJ/m² |
| Heat Deflection Temperature 1 80 Mpa | 120 °C |
| Glass Transition Temperature | 155 °C |
| Water Absorption Saturation | 2.0 % |
| Water Absorption Equilibrium At 23 C 50 Rh | 0.7 % |
As an accredited EMS-Grivory Grilamid TR 90 LS Nylon 12, Conditioned factory, we enforce strict quality protocols—every batch undergoes rigorous testing to ensure consistent efficacy and safety standards.
| Packing | 25 kg sealed polyethylene-lined paper bags of conditioned Grilamid TR 90 LS nylon 12 pellets, protected from moisture. |
| Container Loading (20′ FCL) | Grilamid TR 90 LS Nylon 12 (conditioned) loaded as 20' FCL, palletized bags, secured and protected from moisture. |
| Shipping | Grilamid TR 90 LS is a conditioned transparent nylon 12 resin supplied as dry pellets in sealed moisture-barrier bags inside fiber drums or cartons. Non-hazardous and non-regulated, it ships via standard freight. Protect from punctures, rain, and excessive heat; store below 50°C in a dry area. |
| Storage | Store in original, sealed packaging in a cool, dry environment (ideally below 30°C). Protect from direct sunlight, heat, and moisture, as Grilamid TR 90 LS is hygroscopic. Keep away from oxidizing agents. Ensure containers remain closed when not in use to maintain the conditioned moisture level and prevent degradation. |
| Shelf Life | Shelf life is indefinite when stored in original, sealed packaging away from moisture, heat, and direct sunlight. |
Multi-cavity spectacle front production from EMS-Grivory Grilamid TR 90 LS Conditioned requires desiccant drying at 80°C for 4 h–6 h to a pellet moisture content of ≤0.06% at a −30°C dew point before melt processing. On a 24-cavity cold-runner frame tool mounted in a 1,200 kN hydraulic clamping unit, barrel set points of 235°C–265°C from feed to nozzle and a mould surface temperature of 40°C–60°C keep the transparent polyamide 12 part between the narrow haze boundary and thermal degradation. Melt residence time above 5 min produces a visible shift in the short-wavelength transmission curve; the resulting colour change measured under ISO 11664-4:2008 exceeds ΔE 2.0 against a white standard. Soluble anthraquinone dyes are metered at 0.05 wt%–0.2 wt%, and UV absorber masterbatch is limited to 0.2 wt%–0.5 wt% for sunglass fronts. Masterbatch above 0.5 wt% raises haze above 2% at 2.0 mm wall under ISO 14782:2021. The holding pressure profile for the lens rim is maintained at 60 MPa for 3 s and then 40 MPa for 5 s to pack the hinge zones without gate blush. After demoulding, the frames are conditioned at 23°C/50% RH for 48 h; the tensile modulus falls from approximately 1,600 MPa dry to 1,200 MPa conditioned under ISO 527-1:2019, which lowers lens-rim snap-fit insertion force. The final parts are optical frame fronts, sunglass temples, and safety spectacle side shields covered by EN ISO 12870:2018 requirements for dimensional stability and material durability.
Snap-fit retention in transparent medical enclosures moulded from EMS-Grivory Grilamid TR 90 LS Conditioned is governed by the equilibrium water uptake of the polyamide 12 matrix. According to ISO 62:2008, immersion at 23°C leads to water absorption near 2.0 wt%; at 50% RH the conditioned moisture level is approximately 1.5 wt%. This water uptake lowers the flexural modulus and permits a cantilever beam deflection before yielding that is 20%–30% larger than dry-as-moulded. Injection on a dedicated medical line uses chrome-plated tooling held at 60°C–70°C, injection velocity of 80 mm/s–150 mm/s, and holding pressure 60 MPa–80 MPa for a 2.0 mm wall. The material is evaluated under ISO 10993-5:2009 MEM elution cytotoxicity and USP <88> Class VI systemic injection tests; no lot is released without both documents. Ethylene oxide sterilization at 55°C and 6 h aeration produces no haze increase above 3%; gamma irradiation at 25 kGy is limited to single-use devices because repeated irradiation induces amide bond scission. Regrind from sprue and runner is capped at 15 wt% in patient-contacting components. Finished devices are endoscope handle shells, transparent fluid level indicators, and drug inhaler windows.
Compliance under FDA 21 CFR 177.1500 for nylon 12 in contact with food requires that the finished article, not only the resin, passes extraction testing in water and n-heptane. Moulding of dairy sight glass retainer rings uses melt temperature 240°C–260°C, hot-runner manifold temperature 250°C±5°C, and mould temperature 50°C. The screw root temperature is monitored to avoid surface hydrolysis; materials with moisture 0.06% or lower are mandatory. Migration testing under EU No 10/2011 is performed with simulant A at 70°C for 2 h and simulant D1 for cold aqueous contact; the acceptance criterion for overall migration is 10 mg/dm². Regrind ratio is limited to 20 wt%, and any regrind must come from the same lot and be re-dried to 0.06% before reintroduction. External mould release is not allowed on sealing surfaces; only polished tool steel with Ra 0.05 μm is used. Finished parts are sight glass retaining rings, fluid level tubes, and beverage dispenser actuator covers.
| Application segment | Standard or code | Test condition | Required result |
|---|---|---|---|
| Spectacle frames | EN ISO 12870:2018 | Frame material, dimensional stability, bridge load | No fracture at specified load |
| Medical enclosures | ISO 10993-5:2009 / USP <88> | MEM elution / systemic injection | Non-cytotoxic / Class VI |
| Food contact fittings | FDA 21 CFR 177.1500 / EU No 10/2011 | Water and n-heptane extraction / simulant A 70°C 2 h | OM < 10 mg/dm² |
| Automotive clips | REACH Article 33 / RoHS Directive 2011/65/EU Annex II | XRF screening of homogeneous materials | Below threshold limits |
When automotive clips are exposed to −30°C after conditioning at 23°C/50% RH, the conditioned Charpy notched impact under ISO 179-1/1eA must remain above 15 kJ/m² to prevent barb fracture during installation. Moulding is carried out on an electric toggle machine with 35 mm screw diameter, L/D 22, injection velocity 120 mm/s–200 mm/s, and mould temperature 50°C–60°C. Gas counterpressure 0.3 MPa is applied during filling to suppress weld-line sink in 1.5 mm clip arms. Sprue regrind is limited to 10 wt% for clips with barb engagement. The light-stabilized grade is exposed to ISO 4892-2:2013 cycle 1 for 1,000 h; colour change remains below ΔE 3.0. Chemical compatibility is checked by immersion in polypropylene glycol-based brake fluid and ASTM D543-20 method A for 7 days at 23°C; no surface crazing is permitted. Compliance is documented through REACH Article 33 SVHC disclosure and RoHS Directive 2011/65/EU Annex II XRF screening. Finished products are transparent cable routing clips, connector retainer covers, and sensor bracket mounting pins. For clips located in engine compartments, sustained-use temperature above 90°C is an operational boundary because the combination of heat and absorbed moisture accelerates amide hydrolysis at the surface.
Overmoulding a 0.8 mm polycarbonate substrate with EMS-Grivory Grilamid TR 90 LS Conditioned at a melt temperature of 250°C±5°C creates a transparent structural rim for augmented-reality headset frames, but only if the insert is pre-dried to 0.02% residual moisture and preheated to 100°C before placement to prevent water blistering at the interfacial boundary. The transparent polyamide 12 layer is injected at 40 mm/s–90 mm/s, and the cavity is gas-filled at 8 MPa–12 MPa to produce hollow frame arms. The layer thickness over the substrate gives a thickness ratio of 0.67; below 0.5 the molten front freezes before full knit-line strength is achieved. Haze remains below 1.5% at 1.0 mm wall when the core pin is polished to 0.02 μm Ra and no internal release agent is used. Conditioning at 23°C/50% RH for 72 h produces linear growth of 0.3%–0.5% in the flow direction, which must be compensated in the fixture for lens alignment. The finished components are head-mounted display frames, smart glasses temples, and wearable camera mounts.
Sealing faces for microfluidic manifolds moulded from EMS-Grivory Grilamid TR 90 LS Conditioned are produced from a 2.0 mm flat gate with a flatness tolerance of 0.02 mm; any mould-release residue increases extractables and is prohibited under ISO 10993-12:2021 sample preparation. Melt temperature is kept at 235°C to reduce low-molecular-weight amide oligomer migration, and barrel residence time is held below 3 min. A two-stage screw with L/D 20 and compression ratio 2.2 is used, and the vent depth is limited to 20 μm to prevent gas burn on seal bosses. No masterbatch or external lubricant is permitted in this configuration because extractables from even 0.1 wt% of a fatty acid amide slip additive can alter surface wetting on the manifold land. After conditioning at 23°C/50% RH, the manifold absorbs approximately 1.5 wt% moisture, which lowers flexural modulus enough to seat O-rings without fracture. Finished parts are microfluidic manifolds, lab-on-chip holders, and pneumatic distribution blocks.
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EMS-Grivory Grilamid TR 90 LS Nylon 12, Conditioned is the light-stabilized transparent amorphous polyamide in the moisture-equilibrated state defined by ISO 1110. Accelerated conditioning exposes test specimens to 70 °C and 62 % relative humidity until equilibrium moisture uptake is reached; this state approximates the moisture content of parts exposed to a standard atmosphere of 23 °C and 50 % relative humidity. Although the product designation contains “Nylon 12,” the grade is based on aliphatic and cycloaliphatic monomers and is commonly grouped with nylon 12 for processing and chemical-resistance purposes, but its amorphous morphology distinguishes it from semicrystalline PA 12 homopolymers. In the conditioned state, moisture acts as an internal plasticizer: tensile modulus decreases relative to dry-as-molded values, yield stress shifts lower, and notched Charpy impact strength typically increases. These changes are not defects but must be used for design calculations when parts are exposed to humid air, sweat, or aqueous service.
Representative data for Grilamid TR 90 LS are generated under ISO 527-1/-2, ISO 179/1eA, ISO 75-1/-2, and ISO 1183. The density is approximately 1.00 g/cm³, lower than polycarbonate at 1.19–1.20 g/cm³ and PMMA at 1.17–1.19 g/cm³. Conditioned tensile modulus is generally reported in the range of 1300–1500 MPa, with yield stress near 50–60 MPa and elongation at yield between 5 % and 10 %. The material is used in ophthalmic frames, sports equipment housings, medical device enclosures, and sensor brackets where optical clarity, low mass, chemical resistance, and isotropic shrinkage in the range of 0.4–0.7 % are required. Unlike semicrystalline PA 12, Grilamid TR 90 LS does not exhibit pronounced crystallite melting or anisotropic shrinkage, but heat deflection under load is lower than glass-filled semicrystalline polyamides.
Conditioning increases the equilibrium moisture content of the amide phase. Supplier technical literature commonly reports a tensile modulus decline of approximately 10–20 % after ISO 1110 conditioning because water molecules disrupt interchain hydrogen bonding and increase free volume. The change in yield stress is proportionally smaller, while notched Charpy impact strength at 23 °C may rise from roughly 8 kJ/m² in the dry state to 10–15 kJ/m² after conditioning. Elongation at break is usually above 50 % in both states, indicating ductile failure under the standard tensile test but not necessarily under multiaxial impact.
The glass transition temperature measured by differential scanning calorimetry under ISO 11357-2 is frequently cited near 155 °C for the dry polymer. Conditioned samples exhibit a depressed glass transition onset due to moisture; this means a part that survives a dry heat test may soften earlier after moisture uptake. Heat deflection temperature under 1.8 MPa is typically near 85 °C dry and shifts to approximately 75–80 °C conditioned, while the 0.45 MPa value is commonly near 115 °C. These thermal limits place the material below polycarbonate and semicrystalline PA 12 in load-bearing hot environments but above many optical thermoplastic elastomers.
| Property | Test standard | Dry as molded | Conditioned |
|---|---|---|---|
| Density | ISO 1183 | 1.00 g/cm³ | 1.00 g/cm³ |
| Tensile modulus | ISO 527-1/-2 | 1600 MPa | 1300–1500 MPa |
| Yield stress | ISO 527-1/-2 | 60 MPa | 50–55 MPa |
| Elongation at yield | ISO 527-1/-2 | 6 % | 8–10 % |
| Charpy notched impact, 23 °C | ISO 179/1eA | 8 kJ/m² | 10–15 kJ/m² |
| Heat deflection temperature, 1.8 MPa | ISO 75-1/-2 | 85 °C | 75–80 °C |
The tabulated values are representative ranges from supplier technical literature and are not guaranteed for every production lot. Batch-to-batch variability in moisture uptake and impact strength can occur because of additive dispersion, molecular weight distribution, and pigment loading. Production parts should be qualified with the actual colorant and regrind content, because regrind levels above 20 % may reduce notched Charpy impact strength and shift ultraviolet stabilization efficiency under ISO 4892-2.
Production-scale injection molding of Grilamid TR 90 LS requires drying to below 0.10 % residual moisture. A desiccant dryer set at 80 °C for 4–8 h with a dew point of -30 °C or lower is the standard configuration. If storage relative humidity exceeds 60 %, the drying time should be extended or the hopper should be sealed and purged with dry air. Melt temperatures between 250 °C and 280 °C are used, with mold temperatures from 60 °C to 100 °C to control surface replication, residual stress, and birefringence. The processing window is narrower than for unstabilized transparent polyamide because the light-stabilizer package degrades at elevated residence time; supplier bulletins recommend holding melt residence time below 10 min at 280 °C to avoid visible yellowing and loss of ultraviolet protection.
A general-purpose screw with a length-to-diameter ratio of 20:1 to 25:1 and a compression ratio of 2.0:1 to 2.5:1 is typically adequate for single-flight processing. High screw speeds above 0.3 m/s peripheral speed may introduce shear heating and should be balanced against back pressure, which is usually kept between 0.5 MPa and 1.5 MPa. In thin-wall applications, cavity pressures at the end of fill are maintained between 40 MPa and 60 MPa to minimize sink and hold pressure losses. Post-mold annealing at 90–120 °C can reduce molded-in stress but may increase haze if cooling is non-uniform or if the part is quenched rapidly.
When pre-compounding or masterbatch dilution is performed on a twin-screw extruder with L/D 36:1, the first barrel zones are held below 180 °C to prevent feed throat bridging, and downstream zones are ramped to 260–280 °C. The LS stabilizer package should be protected from excessive shear and oxygen; nitrogen blanketing of the feed throat and vacuum degassing at -80 kPa are common on production lines.
For outdoor optical and structural components, the part designer should not substitute dry-as-molded tensile data for conditioned values. Snap-fit and press-fit calculations should use the conditioned tensile modulus range of 1300–1500 MPa, while creep modulus under ISO 899-1 is required for continuous loading beyond 1000 h. If a part is exposed to 85 °C and 85 % relative humidity, the moisture uptake rate accelerates and the glass transition depression becomes more pronounced. Published data for this specific configuration is limited; therefore, application-specific testing under ISO 175 immersion or ISO 62 moisture absorption is recommended before freezing design geometry.
The LS designation adds a light-stabilizer package that retards photolytic chain scission and yellowing under ultraviolet exposure. Comparative weathering is evaluated under ISO 4892-2 or ISO 4892-3 with measurement of yellowness index under ISO 17223 and gloss retention under ISO 2813. Total luminous transmittance at 2 mm thickness is often reported in the range of 88–91 % using ISO 13468, with haze below 2 % using ISO 14782 for uncolored grades. These values support ophthalmic and sensor-window applications, provided the final part geometry does not create thick sections that reduce transmission or increase birefringence.
The density of approximately 1.00 g/cm³ is a defining difference from polycarbonate and PMMA. However, the lower modulus and heat deflection temperature relative to polycarbonate limit its use in high-stiffness optical housings. Compared with semicrystalline PA 12, Grilamid TR 90 LS offers transparency and lower warpage but has greater moisture sensitivity at elevated temperature. Chemical resistance to aliphatic hydrocarbons, diesel fuel, and many alcohols is generally high; resistance to strong acids, phenols, and concentrated oxidizing agents is limited. Avoid amine-based processing aids or additives that can cause discoloration or crosslinking in the polyamide matrix. For aggressive fluids, immersion testing under ISO 175 is required.
Relative to a non-light-stabilized transparent polyamide of the same base polymerization, the LS grade shifts the ultraviolet absorption edge and slows the increase in yellowness index during outdoor exposure. The exact improvement factor depends on part thickness and exposure protocol; published data for the conditioned grade under all ISO 4892-2 cycle variants is limited, so material qualification should use the intended service irradiance.
Medical device enclosures and sensor brackets made from Grilamid TR 90 LS are evaluated under the finished-device requirements of ISO 10993-1; the polymer grade itself does not confer biocompatibility. Food-contact status should be confirmed with EMS-Grivory for the specific grade and colorant, because compliance under FDA 21 CFR 177.1500 and European Regulation (EU) 10/2011 can vary with additives and processing aids. The unfilled grade is generally outside the scope of RoHS restrictions but should be assessed under EU 2011/65/EU for lead, mercury, cadmium, hexavalent chromium, and specified brominated flame retardants at the component level.
