| HS Code | 503730 |
| Material | EMS-Grivory Grilamid TR 90 NZ Nylon 12, Conditioned |
| Density | 1.01 g/cm³ |
| Water Absorption At Saturation | 1.5 % |
| Humidity Absorption At 23 C 50 Rh | 0.4 % |
| Glass Transition Temperature | 155 °C |
| Melting Temperature | 250 °C |
| Tensile Modulus | 2200 MPa |
| Tensile Strength At Break | 70 MPa |
| Elongation At Break | >50 % |
| Charpy Impact Strength Notched 23 C | 6 kJ/m² |
| Charpy Impact Strength Unnotched 23 C | No break |
| Ball Indentation Hardness | 130 MPa |
| Heat Deflection Temperature At 0 45 Mpa | 120 °C |
| Heat Deflection Temperature At 1 8 Mpa | 110 °C |
| Vicat Softening Temperature B 50 | 140 °C |
As an accredited EMS-Grivory Grilamid TR 90 NZ Nylon 12, Conditioned factory, we enforce strict quality protocols—every batch undergoes rigorous testing to ensure consistent efficacy and safety standards.
| Packing | EMS-Grivory Grilamid TR 90 NZ Nylon 12, Conditioned supplied in 25 kg sealed bags, moisture-protected, ready for processing. |
| Container Loading (20′ FCL) | Load a 20′ FCL with conditioned Grilamid TR 90 NZ nylon 12, evenly distributing and securing packaging to prevent shift during transit. |
| Shipping | Grilamid TR 90 NZ Nylon 12, conditioned is not regulated as dangerous goods for transport. It is shipped as a non-hazardous solid, requiring no special hazard labeling, UN number, or packaging group. Standard dry, sealed packaging with protection from moisture and heat is sufficient for road, sea, rail, or air freight. |
| Storage | Store Grilamid TR 90 NZ in its original, sealed packaging in a cool, dry area away from direct sunlight, heat sources, and UV radiation. Keep the conditioned nylon 12 protected from moisture and condensation; reseal containers tightly after use. Ideal storage temperature is 20–25°C with low humidity to preserve properties and processability. |
| Shelf Life | Shelf life is typically two years from shipment when stored unopened, dry, and below 30°C, protected from moisture. |
At a cavity pressure of 55–70 MPa and a melt cushion held at 3–5 mm, conditioned Grilamid TR 90 NZ pellets are pre-dried in a desiccant dryer at 80 °C to a residual moisture below 0.10 % before entering a 25 mm three-zone screw with L/D 22. Melt temperature is maintained between 250–285 °C; a polished mold temperature of 40–60 °C is required to avoid flow lines and to achieve the low-haze surface specified for ophthalmic rims. Transparent colourant masterbatch is dosed at 0.2–0.8 wt% only if the measured haze remains below 2.0 % per ASTM D1003-21. Regrind from hot-runner sprues and runners is gravimetrically blended at a maximum 20 wt%; higher regrind fractions above 30 wt% shift melt viscosity and increase optical haze beyond the same ASTM D1003-21 limit. The injection profile uses a screw advance of 15–35 mm/s, with transfer from velocity to pressure control at 8–12 mm before final cushion. Valve-gate diameters of 0.8–1.2 mm at the hot drop prevent jetting into the rim bridge. The end product is a rim-locking ophthalmic frame with snap-fit temple retention and integral nose-pad arms. Nickel-plated hinge pins are inserted into the polymer; the finished frame must comply with nickel release limits of <0.5 µg/cm²/week under REACH Annex XVII entry 27. Flexural durability of the assembled frame is validated against ISO 12870:2016 for bridge deformation, temple tensile strength, and metal component corrosion. Conditioned PA12 supplies ductility at -10 °C, which reduces brittle hinge fractures during drop loading.
In transparent bowls for small spark-ignition fuel filters, the conditioned PA12 is processed at a melt temperature of 260–280 °C and a mold temperature of 30–50 °C. The bowl wall is designed at 2.0–3.5 mm to balance burst resistance and optical inspection clarity. The limiting joint is the threaded or spin-welded lid interface. After immersion in Fuel C and 10 vol% ethanol at 60 °C for 168 h per ISO 175:2010, tensile strength retention measured by ISO 527-1:2019 typically remains above 85 %, but dimensional swelling of 0.4–0.8 % can reduce thread engagement by 0.1–0.3 mm. Processors therefore mould female threads at the upper tolerance of +0.05 mm and recondition bowls to equilibrium at 23 °C / 50 % RH before spin welding. Regrind ratio is limited to 15 wt% from stabilised production, and no plasticiser or external lubricant is added because migration into fuel would alter filter media wetting. Spin welding uses axial pressure of 0.15–0.30 MPa, a rotation speed of 800–1200 rpm, and a weld depth of 1.0–1.5 mm. Burn-off marks in the weld zone indicate local melt temperatures above 220 °C and require rejection of the assembly. The finished part is a transparent filter bowl with integral lugs for fuel-pump module retention. Fuel-contact validation is performed per engine-manufacturer specification because the unfilled resin alone does not provide implicit approval for all fuel blends, permeation limits, or pressure-vessel requirements.
Handles for non-implantable, manually operated surgical instruments are injection moulded from a single unfilled pellet grade of Grilamid TR 90 NZ. The resin is pre-dried to <0.10 % moisture and processed at 250–270 °C melt temperature with a mold temperature of 30–50 °C. Injection pressure is kept below 120 MPa to protect textured grip inserts and to reduce mould flash at parting lines. In the conditioned state, typical flexural modulus falls to 1000–1200 MPa when measured by ISO 178:2019, compared with a dry-state modulus near 1500 MPa. That reduction lowers snap-fit insertion force for stainless steel working tips and reduces tactile hardness of the handle. Ethylene oxide sterilisation at 37–55 °C with 600–800 mg/L EtO is acceptable only after aeration that meets residual limits in ISO 10993-7:2008 for ethylene oxide and ethylene chlorohydrin. Gamma irradiation at 25 kGy may produce yellowing; colour shift must be evaluated against the product’s acceptance limit because published data for this specific configuration is limited. Cytotoxicity screening follows ISO 10993-5:2009, while the overall biological evaluation plan follows ISO 10993-1:2018 for the intended patient-contact classification.
| Sterilisation method | Typical cycle | Effect on conditioned TR 90 NZ | Reference method |
|---|---|---|---|
| Ethylene oxide | 37–55 °C, 600–800 mg/L, 6 h | Acceptable after aeration; residual limits apply | ISO 10993-7:2008 |
| Gamma | 25 kGy, sealed pouch | Possible yellowing; not suited to optical clarity windows | ISO 11137-1:2006 |
| Steam | 121 °C, 15 min | Not recommended for load-bearing or close-tolerance bores | ISO 17665-1:2006 |
The end product is a reusable instrument handle with a press-fit or over-moulded distal working end. The grip geometry must survive repeated cleaning solutions, but long-term disinfectant exposure data for hospital-grade quaternary ammonium or chlorinated solutions must be generated for the exact handle design.
Low-temperature impact after moisture conditioning governs the use of Grilamid TR 90 NZ in ski mountaineering goggles and visor carriers. The substrate is injection moulded at 250–280 °C into a polished cavity; TPU seal overmoulding is applied in a second shot with a thickness ratio of 25–35 % of the PA12 wall. The PA12 substrate is surface-activated by corona or plasma before overmoulding, and no solvent primer is permitted because it would attack unstabilised zones near the gate. The unfilled conditioned resin exhibits ductile behavior at -20 °C, which is evaluated by low-temperature flexural or impact testing rather than by room-temperature data alone. Compliance for the assembled goggle frame as personal protective equipment is governed by EN 166:2001 for protective eyewear; the lens carrier is not the certified impact shield unless marked, and CA/CE marking applies to the complete lens-frame system. For North American markets, ANSI/ISEA Z87.1 may apply to the finished eyewear. The end product is a lightweight goggle frame with removable lens retention and adjustable strap anchors. Dimensional stability after moisture uptake is critical because lens groove shrinkage below 0.2 % is required to maintain a leak-free fit with spherical polycarbonate lenses.
Transparent covers for windscreen-mounted optical sensor housings are moulded from Grilamid TR 90 NZ with a melt temperature of 260–285 °C and a mold temperature of 50–60 °C. The cavity is filled by sequential valve gating, and cavity pressure transducers control the switchover to holding pressure at 40–60 MPa. No carbon black or matting agent is added in the optical window area, and mould-release loading is kept below 0.1 wt% to prevent surface bloom. The housing is subjected to thermal cycling from -40 °C to 85 °C for 100 cycles per ISO 16750-4:2010. Splitting or microcracking at weld lines after cycling requires a change in gate location or melt temperature, not an impact-modifier adjustment. Vibration testing follows the vehicle manufacturer’s specification, but the unfilled grade’s ductile response in conditioned state reduces brittle fastener-boss failures during resonant loading. Fogging of the lens window is evaluated by gravimetric or reflectance methods under the OEM’s interior component standard; published data for this specific configuration is limited, so prototypes must be tested with the intended gasket and PCB assembly. The end product is a sensor cover with a laser-welded black PA12 base or snap-fit housing, providing environmental isolation for humidity-sensitive optical components.
In a high-clarity sight glass housing for a chemical dosing skid, process stability depends on melt viscosity retention after 25 wt% regrind is blended with virgin conditioned pellets. The resin is dried at 80 °C for 4–8 h to below 0.10 % moisture because hydrolytic degradation in the barrel is accelerated above 0.15 % moisture. Melt temperature is maintained at 255–275 °C, with barrel residence time kept below 5 min to avoid yellowing. The melt-flow rate is monitored per ISO 1133-1:2022; a shift greater than ±10 % from the virgin conditioned value indicates that regrind should be reduced or process temperature corrected. Wall thickness is designed at 3.0–5.0 mm for chemical compatibility and mechanical stiffness. The housing is immersed in 5 % sodium hypochlorite at 40 °C for 168 h per ISO 175:2010, with dimensional change measured at the sealing flange. If the flange diameter changes more than 0.15 %, the gasket compression set may fail. The end product is a transparent housing cover that allows liquid level inspection without opening a wetted chemical line. Leak testing of the assembled cover is performed with compressed air at 0.3 bar under water.
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EMS-Grivory Grilamid TR 90 NZ is a transparent amorphous polyamide based on nylon 12 chemistry, supplied as natural pellets. The “Conditioned” designation refers to the moisture-conditioned state of test specimens or components, not to a compounded additive package. Conditioning is commonly performed under accelerated protocols such as ISO 1110 or in a standard atmosphere defined by ISO 291 at 23 °C and 50 % relative humidity. For this nylon 12 system, equilibrium moisture at 23 °C and 50 % RH is typically in the range of 0.6–0.8 % by weight, while immersion saturation according to ISO 62 is reported near 1.5 % by weight, depending on wall thickness and processing orientation. The material belongs to the Grilamid TR family, which is differentiated from semi-crystalline nylon 12 by the absence of a sharp crystallite melting endotherm and by optical transparency in sections of several millimetres.
The conditioned mechanical profile is the relevant design basis for components exposed to ambient humidity. In manufacturer technical literature, the density of the unfilled natural grade is given as 1.00 g/cm³ to ISO 1183. Tensile modulus tested to ISO 527-1/-2 is approximately 1600 MPa in the dry state and 1400 MPa after conditioning. Tensile stress at yield moves from about 60 MPa to 50 MPa, while nominal strain at break remains above 50 % in both states. These are typical single-point values, not minimum lot specifications; the actual conditioned modulus of a moulded article depends on local moisture content, orientation, and thickness.
Absorbed water acts as a plasticiser in the amorphous polyamide matrix. It inserts between amide groups, reduces intermolecular hydrogen bonding, and lowers the glass transition temperature. This produces a measurable loss in stiffness and yield stress while increasing ductility and notched impact resistance. The conditioned Charpy notched impact strength tested to ISO 179-1/1eA is typically higher than the dry value; manufacturer data often place the conditioned value near 15 kJ/m² compared with 10 kJ/m² dry, although the exact delta depends on notch radius and specimen preparation. Conditioned Charpy unnotched tests to ISO 179-1/1eU generally show no break at 23 °C.
The moisture sensitivity of Grilamid TR 90 NZ is lower than that of PA 6 and PA 66 because the nylon 12 backbone contains fewer amide groups per unit chain length. At 23 °C and 50 % relative humidity, PA 6 commonly absorbs 2.5–3.0 % water, whereas this grade remains below 1.0 %; consequently, the shift from dry to conditioned modulus is smaller. Dimensional change after conditioning is also less severe, but not negligible: a thickness increase of 0.1–0.2 % is possible because water uptake increases volume. The glass transition temperature reported for the dry material is approximately 155 °C by DSC to ISO 11357-2, and conditioning produces a lower effective glass transition. Deflection temperature under load to ISO 75-1/-2 at 1.8 MPa is commonly reported near 110 °C for dry specimens; conditioned values are lower and should be used for load-bearing transparent parts.
| Property | Dry | Conditioned | Standard |
|---|---|---|---|
| Density | 1.00 g/cm³ | 1.00 g/cm³ | ISO 1183 |
| Tensile modulus | 1600 MPa | 1400 MPa | ISO 527-1/-2 |
| Tensile stress at yield | 60 MPa | 50 MPa | ISO 527-1/-2 |
| Nominal strain at break | >50 % | >50 % | ISO 527-1/-2 |
| Charpy notched impact strength | 10 kJ/m² | 15 kJ/m² | ISO 179-1/1eA |
| Equilibrium moisture at 23 °C/50 % RH | 0.6–0.8 % | 0.6–0.8 % | ISO 62/equilibrium |
Pre-drying is not optional. Residual moisture above 0.10 % by weight in the melt creates splay, silver streaks, and haze in transparent sections. Production dryers should maintain a dew point of ≤ -40 °C and a drying air temperature of 80 °C. Pellets from sealed bags can be dried for 4–6 h; cold or open storage at RH above 60 % requires 8 h or more. In humid plants without desiccant dryers, batch-to-batch variation in apparent melt viscosity and optical clarity is observed because pellet moisture shifts the effective melt flow.
The barrel profile recommended for this grade is 240 °C to 280 °C, with flat-to-reverse temperature profiles to limit residence time in the front zone. Mould-wall temperature is commonly set between 40 °C and 80 °C. Below 40 °C, polished cavity replication suffers and weld lines become visible in thick-to-thin transitions; above 80 °C, cycle time increases and gate-stringing may become problematic. A melt temperature above 280 °C can cause local yellowing and molecular-weight loss, while below 240 °C high injection pressure is needed, raising orientation and stress birefringence.
Screw geometry should be a low-compression, general-purpose design of 20:1 to 25:1 L/D ratio. High-compression nylon screws generate excessive short-chain shear heating and can burn transparent material at the check ring. Back pressure of 5–10 bar hydraulic is sufficient; higher back pressure adds melt temperature and increases colour shift. Holding pressure typically ranges from 50 % to 70 % of peak injection pressure, with holding time set by gate seal. Processing shrinkage for the amorphous grade is given in manufacturer data near 0.4–0.7 %, lower and more isotropic than semi-crystalline nylon 12 because no crystallite volume reduction occurs during solidification.
Residence time should be kept below 6 min at full melt temperature; longer exposure accelerates yellowing in natural transparent grades. Screw rotation speed is set to give shot recovery at 60–80 % of the cooling time. In hot-runner systems, manifolds and nozzles are normally held at the upper end of the melt-temperature window, but not above 280 °C. Temperature differences greater than 5 °C between nozzle tips in multi-cavity tools produce visible flow lines and part-to-part weight variation. Valve-gated hot runners require precise delay times after fill to avoid gate blush; published data for specific gate configurations is limited and process trials are required.
| Processing variable | Typical value or range | Unit/condition |
|---|---|---|
| Pre-drying temperature | 80 °C | Desiccant dryer |
| Pre-drying time | 4–8 h | Sealed bags to open storage |
| Residual moisture | ≤0.10 % | By weight |
| Barrel melt temperature | 240–280 °C | Front-to-rear profile |
| Mould temperature | 40–80 °C | Polished cavity surface |
| Back pressure | 5–10 bar | Hydraulic |
| Processing shrinkage | 0.4–0.7 % | Part-dependent |
| Dew point | ≤ -40 °C | Desiccant dryer |
Chemical resistance data for Grilamid TR 90 NZ reflect the amorphous nylon 12 chemistry. The grade withstands intermittent contact with aliphatic hydrocarbons, mineral oils, greases, and many non-polar solvents. Prolonged immersion in aromatic hydrocarbons or ketones may produce swelling and a reduction in tensile modulus; strong mineral acids, hot polar solvents, and continuous hot water above 60 °C are not recommended because hydrolysis and environmental stress cracking can develop under constraint. Resistance to environmental stress cracking in personal-care products and plasticisers is a primary differentiator from polycarbonate, particularly for spectacle frames and wearable devices. Testing per ISO 175 or ISO 22088 is used to assess immersion and environmental stress-cracking resistance. The user should test finished parts under the actual chemical mixture because moulded-in stress and machined edges dominate stress-cracking initiation.
The nylon 12 base resin is listed under FDA 21 CFR 177.1500 for repeat-use food-contact articles, subject to limitations on extractives and the specific additive package in the NZ natural formulation. EMS-Grivory provides declarations for European food-contact compliance under Regulation (EU) 10/2011 when requested. The grade is not sold as a flame-retarded compound; the unfilled natural material is expected to carry a UL 94 HB classification, which excludes its use in electrical enclosures requiring V-2 or better. REACH and RoHS Directive 2011/65/EU declarations should be obtained from the supplier for the exact production lot. Colouring with externally added concentrates may invalidate food-contact or optical clauses if the carrier resin or pigments migrate. Medical device applications require ISO 10993-1 biological evaluation; the raw material supplier can provide formulation disclosure for toxicological risk assessment. Sterilisation by gamma irradiation may cause yellowing and loss of ductility in natural polyamides; if sterilisation is required, low-dose electron beam or ethylene oxide is typically less damaging, but end-user validation is necessary.
Optical transmission in Grilamid TR 90 NZ at 2 mm wall thickness is commonly reported near 92 % total luminous transmittance under ISO 13468, with haze below 1.0 % when the resin is dried and moulded in polished tools. The refractive index is approximately 1.51, which is close to PMMA and lower than polycarbonate, simplifying coating stack design. Weld lines, gate bloom, and sharp thickness transitions reduce local transmission; polarised light inspection and post-annealing below 80 °C are used on critical optical parts to detect residual stress. Because the material is amorphous, optical anisotropy is lower than in semi-crystalline nylon 12 but can still be induced by high packing pressure near the gate.
Compared with polycarbonate, Grilamid TR 90 NZ has a lower density of approximately 1.00 g/cm³ versus 1.20 g/cm³, lower room-temperature impact strength, and lower continuous-use temperature under dry heat. It offers better stress-cracking resistance to plasticisers, fragrances, and skin-care chemicals; this is the principal reason for its selection in thin-wall spectacle frames where polycarbonate can craze at hinge inserts. Processing temperatures are lower than polycarbonate, and the melt has a more gradual viscosity-temperature response, which supports multi-cavity filling of long-flow-length frames.
Against PMMA, the nylon 12-based amorphous grade has higher elongation at break and better resistance to impact-induced fracture, but lower scratch resistance and surface hardness. PMMA remains preferred for flat display windows where static load and surface gloss are dominant. For wearable devices with snap fits and repeated flexure, the conditioned ductility of Grilamid TR 90 NZ is a technical advantage.
Compared with semi-crystalline nylon 12 extrusion grades, TR 90 NZ is amorphous and transparent. The absence of crystallisation removes spherulitic haze and post-moulding crystallite shrinkage, but also removes the crystalline network that restricts hot-water penetration. Semi-crystalline PA12 is selected for fuel lines, pneumatic tubing, and catheters where wet fatigue resistance and low-temperature impact are governing. TR 90 NZ is selected where transparency, chemical stress-cracking resistance, and dimensional stability in dry ambient environments must be combined in injection-moulded components.
Usage is concentrated in injection-moulded transparent articles that require a combination of low weight, high ductility, and resistance to personal-care and household chemicals. Typical applications include spectacle frames, sports goggles, transparent watch housings, medical device clips, pump components, and cosmetic packaging closures. In each case, the conditioned mechanical data, not the dry data, should be used for finite-element analysis of snap fits and deflection under service load.
