| HS Code | 354973 |
| Material | EMS-Grivory Grilamid TR 90 UV LS nat Nylon 12, Conditioned |
| Density | 1.01 g/cm³ |
| Water Absorption At Saturation 23 C 50 Rh | 0.6 % |
| Tensile Modulus | 2100 MPa |
| Tensile Stress At Break | 65 MPa |
| Elongation At Break | 50 % |
| Flexural Modulus | 2000 MPa |
| Charpy Notched Impact Strength 23 C | 14 kJ/m² |
| Charpy Unnotched Impact Strength 23 C | No break |
| Heat Deflection Temperature 1 80 Mpa | 100 °C |
| Heat Deflection Temperature 0 45 Mpa | 120 °C |
| Glass Transition Temperature | 155 °C |
| Melting Temperature | 200 °C |
As an accredited EMS-Grivory Grilamid TR 90 UV LS nat Nylon 12, Conditioned factory, we enforce strict quality protocols—every batch undergoes rigorous testing to ensure consistent efficacy and safety standards.
| Packing | Packaged in sealed, moisture-proof 25 kg bags to preserve the conditioned Nylon 12 pellets during transport and storage. |
| Container Loading (20′ FCL) | Load 20′ FCL with palletized, moisture-protected bags of Grilamid TR 90 UV LS nat Nylon 12; secure tightly, keep dry, avoid contamination. |
| Shipping | Shipped in sealed, moisture-resistant packaging to prevent nylon degradation. Palletized and stretch-wrapped for safe transit. Not regulated as hazardous material under DOT/IMDG, though keep away from excessive heat and humidity. Standard ground freight applies. Inspect for damage upon delivery; store in a cool, dry area. |
| Storage | Store in a sealed, original container in a cool, dry, well-ventilated area away from direct sunlight, heat sources, and moisture. Keep the container tightly closed when not in use to prevent water absorption and contamination. Avoid contact with strong oxidizers. Maintain stable room temperature conditions to preserve material properties. |
| Shelf Life | Shelf life is typically 2 years when stored unopened, dry, and cool in original packaging, away from direct sunlight. |
Injection moulding of spectacle frame fronts and temple components using Grilamid TR 90 UV LS nat in the conditioned state begins with re-drying to 0.10 % moisture by weight before melt processing. The conditioned supply is stabilised to equilibrium moisture according to ISO 1110:2019, typically 0.5 % at 23 °C and 50 % relative humidity. Drying is performed in a desiccant dryer with a -30 °C dew point at 80 ± 5 °C for 4 h to 6 h. The melt is processed on a 50 t to 100 t hydraulic toggle injection moulding machine with a 20:1 to 22:1 L/D barrier screw and a non-return valve. Barrel temperature settings are 240 °C to 265 °C, mould temperature 40 °C to 60 °C, injection speed 80 mm/s to 120 mm/s, back pressure 5 MPa, and holding pressure 70 MPa for 1.5 s. The frame front is gated at the bridge with an edge gate of 1.0 mm; temple arms are gated at the hinge block. Wall thickness is 1.8 mm to 2.4 mm. Regrind is excluded from optical surfaces and limited to 15 wt% on temple components, provided the regrind has no more than three heat histories and is dried identically. Luminous transmittance through a 2 mm polished plaque is measured according to ISO 13468-2:2019; the natural grade typically shows 88 % to 91 % depending on surface finish and moisture state. Compliance for European distribution refers to ISO 12870:2016 for frame dimensions and strength, REACH Article 33 for substances of very high concern, and 2011/65/EU RoHS for attached electrical accessories. The terminal product is an injection-moulded transparent spectacle frame front with integrated temple arms meeting the dimensional stability and strength requirements of ISO 12870:2016.
Transparent filter bowls and reservoirs for compressed air preparation units are injection-moulded from conditioned Grilamid TR 90 UV LS nat when the application requires breakage resistance superior to polycarbonate in the presence of synthetic compressor oils and alcohol-based cleaners. The material is re-dried to 0.08 % moisture before moulding; residual moisture above 0.10 % lowers melt viscosity and causes splay, internal voids, and a reduction in burst pressure. Moulding uses a 120 t hydraulic machine with a 25:1 L/D screw and vented barrel. Melt temperature is set to 250 °C to 270 °C, mould temperature 60 °C to 80 °C, pack pressure 60 MPa to 80 MPa, and cooling time 22 s to 28 s for a 3.0 mm wall. The cavity is polished to SPI/SPE A-1 finish and vented with 0.02 mm land depth around the parting line. A central valve gate of 1.2 mm prevents jetting; two-stage decompression of 5 MPa then 0 MPa eliminates gate blush. Regrind is allowed at 20 wt% maximum from the same material, with not more than two regrind cycles and a post-drying moisture target of 0.06 %. Compliance for compressed air systems refers to ISO 8573-1:2010 for compressed air purity classes and ISO 4414:2010 for pneumatic system safety. The moulded article is a 120 mm diameter transparent filter bowl with 1/2 NPT threaded inlet, 3.0 mm wall thickness, and rated operating pressure of 10 bar at 20 °C. Continuous exposure to methanol above 15 vol% at 50 °C or strong oxidising acids is outside the recommended boundary; validation by ISO 175:2010 immersion testing is required for each cleaner.
In non-invasive fluid management devices the material enters the manufacturing cell as a sealed, double-bagged moisture-conditioned pellet, then is dried in a cleanroom-compatible desiccant dryer at 80 °C for 5 h to 0.10 % moisture. Injection moulding is carried out in an ISO 14644-1:2015 Class 8 or better cleanroom using a 35 t all-electric machine with a medical-grade screw. Melt temperature is restricted to 245 °C to 260 °C; above 265 °C the material begins to yellow and light transmittance falls below practical limits. Mold temperature is held at 50 °C to 60 °C, injection speed 50 mm/s to 80 mm/s, and hold pressure 70 MPa for 2.0 s. A valve-gated hot runner with a 0.8 mm tip is used; cold runners are not permitted because they generate regrind. No regrind or off-spec mixing is allowed. The terminal product is a transparent flow sensor housing with 2.0 mm wall thickness and integrated Luer features complying with ISO 80369-7:2016. Biocompatibility verification is done to ISO 10993-5:2009 for cytotoxicity and ISO 10993-10:2010 for irritation. Plastic packaging composition is assessed against USP 661.1 where applicable. Steam sterilisation at 121 ± 2 °C for 15 min is validated for 25 cycles; haze increase is measurable after repeated autoclaving and must be accepted by the device specification. Biocompatibility data for the selected grade must be generated for each device family because the UV LS nat designation does not alone guarantee medical certification. The polymer is not intended for implanted or long-term tissue-contact use.
Automotive interior light guides present a conflict between high mould temperature for stress reduction and the residence time of an amorphous polyamide. The material is dried to 0.08 % moisture and processed at a melt temperature of 250 °C to 270 °C. Mold temperature is raised to 70 °C to 80 °C to lower shear stress and birefringence; below 60 °C the light transmission becomes non-uniform under polarised inspection. A 90 t all-electric machine with 22:1 L/D screw and sequential valve gates is used. Injection speed is 40 mm/s to 60 mm/s; high-speed filling above 100 mm/s produces gate blush and microvoids along the light path. The cavity is designed with a 1.5 mm to 2.0 mm uniform wall thickness and polished to SPI/SPE A-1. Holding pressure is 65 MPa for 1.8 s; overpacking beyond 80 MPa increases residual stress and deflection after post-mould annealing. Regrind is not permitted because even 5 wt% contamination with dried and remelted amorphous PA12 shifts the refractive index enough to produce dark line defects. The terminal product is a 120 mm long interior ambient light guide with 2.5 mm diameter micro-lens array along the rear face; light transmittance is verified with ISO 13468-2 at 2 mm thickness. Automotive weathering validation for interior plastics is performed according to SAE J2412:2004 or SAE J2527:2017; the UV-stabilised grade is selected to reduce visible yellowing over xenon exposure. Manufacturing quality follows IATF 16949:2016. Continuous service temperature should not exceed 90 °C to avoid dimensional relaxation of the light guide.
A transparent closure for a 100 mL glass flacon is treated as a packaging component, not as a cosmetic product. The closure is injection-moulded from Grilamid TR 90 UV LS nat with a moisture pre-drying step to 0.10 % at 80 °C for 4 h. Melt temperature is 245 °C to 265 °C, mould temperature 45 °C to 55 °C, and cooling time 18 s for a 2.2 mm wall. The gate is a sub-gate with 0.6 mm diameter; the gate vestige is dressed to below 0.05 mm to avoid visible imperfection on the top surface. Regrind is limited to 5 wt% and only if the resulting haze after 24 h ethanol immersion remains below a 2 % change measured by ASTM D1003. Chemical resistance is assessed according to ISO 175:2010; continuous exposure is restricted to 60 vol% ethanol at 40 °C for 72 h without visible crazing. Packaging migration requirements follow EU Regulation (EC) No 10/2011 Annex II overall migration limit 10 mg/dm², with the appropriate simulant assigned to the product type. The terminal product is a 15 g transparent cap with internal thread 24/410, press-fit closure force 18 N to 25 N. The material is not approved for direct contact with highly volatile silicone fluids or pure acetone-based nail polish removers beyond 5 min accidental exposure.
For potable water flow-meter chambers the specification begins with long-term hydrostatic resistance and clarity retention after chloramine exposure. The conditioned grade is re-dried to 0.08 % moisture, then injection-moulded on a 150 t hydraulic machine with 24:1 L/D screw. Melt temperature is 250 °C to 270 °C, mould temperature 65 °C to 75 °C, and holding pressure 75 MPa for 2.5 s. The chamber is a DN 15 transparent housing with 4.0 mm wall thickness and 16 bar rated pressure at 20 °C. Weld lines are directed to the top flange to keep the flow path optically clear. Regrind is allowed at 10 wt% maximum if the source material has not been exposed to potable water service and the finished component retains certification under NSF/ANSI/CAN 61:2023. The standard test protocol is the cold water exposure test for mechanical plumbing devices; the grade may require formulation-specific certification because additives are not uniform across suppliers. Additional market requirements include AS/NZS 4020:2018 for water contact and EU Council Directive 98/83/EC drinking water parameters. The terminal product is a transparent flow-meter chamber for a positive displacement meter with a 0.5 L/min to 20 L/min measuring range. Continuous service above 60 °C or pH below 5.0 is not recommended without long-term hydrolytic stability data.
Competitive EMS-Grivory Grilamid TR 90 UV LS nat Nylon 12, Conditioned 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 TR 90 UV LS nat Nylon 12, Conditioned is a transparent amorphous polyamide molding compound supplied in natural color with a UV absorber and a light-stabilizer system. The conditioned designation indicates that molded test specimens or components have been brought to moisture equilibrium at 23 °C and 50 % relative humidity in accordance with ISO 1110 before property evaluation. The base resin belongs to the Grilamid TR family; despite the “Nylon 12” trade reference, it does not develop the spherulitic crystallinity of semicrystalline polyamide 12 homopolymer. This amorphous morphology is responsible for transparency, low anisotropic shrinkage, and a glass transition temperature near 155 °C when measured by differential scanning calorimetry under ISO 11357-2. Typical applications include transparent technical components in eyewear, sports equipment, automotive interior trim, and medical device housings in which optical clarity, chemical stress-crack resistance, and dimensional stability in humid air are required.
Moisture conditioning of the amorphous polyamide matrix is not equivalent to water absorption in semicrystalline PA6 or PA66. The conditioning reference environment of 23 °C and 50 % RH produces limited equilibrium moisture uptake because the cycloaliphatic chain structure restricts water diffusion. Conditioning time is thickness-dependent: a 2 mm wall may require several days to approach equilibrium, while a 4 mm wall can require significantly longer. The low equilibrium uptake limits the absolute swelling strain; dimensional growth under 50 % RH is below that of PA6 and PA66. Processors should not force-dry conditioned components above 60 °C because this can drive out moisture and cause temporary embrittlement of snap features until reconditioning occurs.
Conditioned test results for amorphous polyamide of this generic class are obtained after equilibrium at 23 °C and 50 % RH. The water uptake of Grilamid TR 90 is low relative to PA6 and PA66; the saturation water absorption published by the manufacturer is approximately 1.5 % under ISO 62. Moisture acts as a plasticizer in the amorphous amide phase, reducing stiffness and increasing chain mobility. For dry-as-molded specimens, the manufacturer publishes a tensile modulus of approximately 1600 MPa and a yield stress of approximately 60 MPa under ISO 527-1/-2. Elongation at break is reported as >50 %, and notched Charpy impact at 23 °C is approximately 10 kJ/m² under ISO 179/1eA. Published data for the exact conditioned tensile modulus is limited; users should not extrapolate from PA6 or PA66 because of the lower equilibrium moisture uptake and amorphous morphology. The heat deflection temperature under 1.8 MPa is approximately 90 °C by ISO 75-2/A, and the Vicat softening temperature is near 150 °C by ISO 306/B50.
| Property | Test Method | Published Typical Value |
|---|---|---|
| Density | ISO 1183-1 | 1.00 g/cm³ |
| Tensile modulus | ISO 527-1/-2 | 1600 MPa |
| Yield stress | ISO 527-1/-2 | 60 MPa |
| Elongation at break | ISO 527-1/-2 | >50 % |
| Charpy notched impact, 23 °C | ISO 179/1eA | 10 kJ/m² |
| Heat deflection temperature, 1.8 MPa | ISO 75-2/A | 90 °C |
| Vicat softening temperature, 50 N | ISO 306/B50 | 150 °C |
| Saturated water absorption | ISO 62 | 1.5 % |
| Light transmission, 2 mm | ISO 13468-2 | 92 % |
For melt processing, the granulate must be predried in a dehumidified-air dryer at 80 °C for 4 h to 6 h to a residual moisture level below 0.10 %. Drying below this threshold is critical because water in the melt hydrolyzes the amide linkages, increasing melt flow variation and generating surface splay, silver streaks, and optical haze. Production-scale reciprocating-screw injection molding machines with a general-purpose three-zone screw and a non-return check ring are used; a screw L/D between 20:1 and 25:1 is typical for this amorphous material. Barrel temperatures from the feed throat to the nozzle are set between 250 °C and 280 °C, with the nozzle held at or below 280 °C. Mold temperature is controlled between 40 °C and 80 °C; the lower portion of this range reduces cycle time and minimizes birefringence in thick optical sections, while the upper portion improves surface replication and reduces molded-in stress. Melt residence time at the upper temperature limit should not exceed 10 min to avoid yellowing of the natural grade. Back pressure of 5 MPa to 10 MPa and injection velocities in the low-to-moderate range are preferred because excessive shear can generate flow lines and optical anisotropy. Outside these boundaries, failure modes observed on injection lines include gas burns at the vent due to trapped moisture, dimensional bowing after ejection when mold temperature is nonuniform, and surface haze when the melt temperature falls below 250 °C and the amorphous skin freezes too rapidly.
Rheological characterization of the dry resin by capillary rheometry at 260 °C shows shear-thinning behavior typical of amorphous polyamides. Melt volume-flow rate under ISO 1133-1 at 275 °C with a 5 kg load is often in the range of 10 cm³/10 min to 20 cm³/10 min, though lot-specific datasheets should be consulted. The shear viscosity at 1000 s⁻¹ and 270 °C is low enough for thin-wall molding of 0.8 mm optical frames but high enough to avoid flash in multi-cavity tools. On a twin-screw extruder with L/D 40:1, compounding or masterbatch dilution is possible; however, the amorphous resin requires lower shear heating and tighter temperature control than semicrystalline PA12 to avoid depolymerization and color drift.
The natural-grade TR 90 UV LS variant is stabilized for outdoor and high-UV exposure environments. In the stabilized natural grade, light transmission at 2 mm is approximately 92 % under ISO 13468-2, with haze typically below 3 % when measured by ASTM D1003. The amorphous polyamide matrix has a refractive index close to 1.50; this optical isotropy reduces birefringence compared with polycarbonate in thick sections. The UV absorber and light-stabilizer package retards photodegradation, yellowing, and surface microcracking under xenon-arc weathering in accordance with ISO 4892-2. Published quantitative weathering data for the UV LS nat grade is limited; outdoor compliance must be validated with component-specific UV dose, humidity cycles, and contact media. Stabilizer migration kinetics in polymer matrices exposed to sebum, sunscreen, and isopropanol can influence service lifetime; surface contact testing under ISO 10993-10 or application-specific cosmetic media is recommended before production release. The grade is not supplied as a UV-transparent optical material for UV-C sterilization paths; the stabilizer package absorbs UV wavelengths and therefore reduces transmission below 400 nm.
Compared with the unstabilized Grilamid TR 90 base resin, the UV LS nat variant provides improved weathering stabilization but may exhibit slightly lower light transmission in the visible spectrum because of UV absorber absorbance. The natural-color designation indicates an uncolored resin; color masterbatches can be used only with carrier systems approved for amorphous polyamides, and pigment loading will reduce the published optical values.
If the application involves contact with polar organic fluids, including ethanol/water mixtures, sebum, or sunscreen, Grilamid TR 90 UV LS nat is often selected over polycarbonate and PMMA because of polyamide-typical environmental stress-crack resistance. In comparative immersion testing at 23 °C for 7 days, amorphous polyamide of this class retains a higher proportion of tensile strength than polycarbonate in ethanol/water mixtures; however, published data for this specific conditioned grade in all formulation combinations is limited. The material is unsuitable for continuous exposure to strong acids, strong bases, chlorinated solvents, and steam above 90 °C. Compared with semicrystalline PA12 homopolymer, the amorphous TR 90 grade provides higher glass transition temperature and transparency, but lower chemical resistance in certain hydrocarbons and lower fatigue endurance under cyclic loading. The isotropic shrinkage of the amorphous melt reduces warpage in precision frameworks: published mold shrinkage for the natural grade is approximately 0.4 % to 0.7 %, whereas semicrystalline PA12 can exhibit direction-dependent shrinkage. In humid service, moisture-induced dimensional change is closer to isotropic than in semicrystalline polyamides because no crystalline phase restrains swelling in one direction. This property is valuable for snap-fit optical housings and spectacle frames that must maintain lens retention force after conditioning.
For medical device housings, biocompatibility evaluations are conducted under ISO 10993-5 and ISO 10993-10, and the supplier provides a change-control statement for the natural grade. The material can be sterilized by ethylene oxide and gamma irradiation; published data for the exact color shift after gamma irradiation is limited, so terminal sterilization must be qualified against optical and mechanical specifications. Components conditioned at 23 °C and 50 % RH may require several days to weeks depending on wall thickness before final dimensional inspection.
| Regulatory or Quality Requirement | Standard or Method | Typical Supplier Status |
|---|---|---|
| RoHS restricted substances | 2011/65/EU and IEC 62321-5 | Compliant by supplier certificate |
| REACH SVHC declaration | 1907/2006 Article 33(1) | No intentionally added SVHC |
| Flammability rating | UL 94 | HB |
| Biocompatibility | ISO 10993-5, ISO 10993-10 | Component-specific evaluation required |
| Weathering | ISO 4892-2 | Stabilized grade; component validation required |
