| HS Code | 553994 |
| Density | 1.01 g/cm3 |
| Melting Point | 172 deg C |
| Glass Transition Temperature | -45 deg C |
| Tensile Modulus | 300 MPa |
| Tensile Stress At Yield | 30 MPa |
| Elongation At Break | 250 % |
| Flexural Modulus | 280 MPa |
| Shore D Hardness | 45 |
| Charpy Impact Strength At 23 Deg C | No Break |
| Heat Deflection Temperature At 1 8 Mpa | 39 deg C |
| Vicat Softening Temperature B 50 | 88 deg C |
| Water Absorption After 24 H | 0.5 % |
| Volume Resistivity | 1e13 ohm m |
| Linear Thermal Expansion Coefficient | 2.0e-4 /deg C |
As an accredited EMS-Grivory Grilamid L 25 W 40 Nylon 12, Dry factory, we enforce strict quality protocols—every batch undergoes rigorous testing to ensure consistent efficacy and safety standards.
| Packing | EMS-Grivory Grilamid L 25 W 40 Nylon 12, Dry, supplied in sealed 25 kg bags to preserve low moisture and purity. |
| Container Loading (20′ FCL) | 20′ FCL loading of dry Nylon 12 granules, packed in sealed bags on pallets, secured for safe transport. |
| Shipping | Grilamid L 25 W 40 Nylon 12 ships as dry, moisture-sensitive pellets in sealed, moisture-proof packaging. Avoid exposure to humidity during transit and storage; keep containers closed in a cool, dry area. Non-hazardous, it transports via standard freight methods without special restrictions, provided handling prevents contamination or water damage. |
| Storage | Store Grilamid L 25 W 40 in its original, unopened, moisture-proof packaging in a cool, dry, and well-ventilated area. Keep away from direct sunlight, heat sources, and open flames. Maintain temperatures below 30°C and low humidity to prevent moisture absorption. Properly sealed, it retains its properties for up to two years. |
| Shelf Life | Shelf life is typically unlimited when stored dry, cool, and protected from moisture and UV light in original packaging. |
In automotive evaporative emission control and fuel-vapour management systems, EMS-Grivory Grilamid L 25 W 40 Nylon 12, Dry is processed as the exterior layer of multilayer low-permeation tubing because its low equilibrium water absorption, typically 1.5 wt% at saturation under ISO 62:2008, and resistance to zinc chloride road de-icing salts reduce stress-cracking initiation at quick-connect interfaces. The governing compliance framework for this application includes SAE J2260 for low-permeation fuel and vapour tubing, ISO 19013-2:2019 for diesel fuel circuit tubing, and the material restrictions of Regulation (EC) No 1907/2006 Annex XVII. Formulation addition ratio in a five-layer coextrusion is controlled as follows: virgin Grilamid L 25 W 40 constitutes 55–70 wt% of total tube mass; an EVOH barrier layer accounts for 3–5 wt%; tie-layer adhesives combined account for 10–20 wt%; carbon black masterbatch is incorporated at 2.0–3.0 wt% of the exterior layer only when ultraviolet resistance is specified; and clean reprocessed PA12 regrind is limited to 15–20 wt% after viscosity number verification under ISO 307:2019 in m-cresol. Downstream production equipment for this tube family includes a 45 mm single-screw extruder with 30:1 L/D for the outer layer, a spiral mandrel coextrusion die with wall-thickness eccentricity held below 0.05 mm, a vacuum calibration tank operated at 20–40 °C, and ultrasonic wall-thickness scanning at line speeds of 20–60 m/min. Terminal finished components in this segment include 1/4-inch to 5/8-inch evaporative vapour return lines, canister purge tubes, fuel filler neck vent lines, and quick-connect fuel-vapour connectors. Operational boundary: the material must be pre-dried at 80–100 °C for 4–6 h to below 0.10 wt% residual moisture under ISO 15512:2019 whenever storage relative humidity exceeds 60%; melt temperature excursions above 270 °C should be avoided because yellowing and viscosity shift in PA12 become irreversible. Avoid combination with unvalidated amine-based processing aids that can produce extractable surface bloom and reduce quick-connect retention force.
| Processing condition | Specification | Reference method or equipment |
| Residual moisture at processing | below 0.10 wt% | ISO 15512:2019 |
| Pre-drying dry-air | 80–100 °C for 4–6 h | Dry-air dryer with dew point -30 to -40 °C |
| Melt temperature window | 230–260 °C | IR melt probe at die exit |
| Screw configuration | 25:1–30:1 L/D single screw | Grooved feed section with mixing pins |
| Clean regrind allowance | 15–20 wt% | ISO 307:2019 viscosity number check |
| Tube diameter tolerance | ±0.05 mm | Laser diameter gauge with closed-loop control |
Pneumatic tubing lines manufactured from EMS-Grivory Grilamid L 25 W 40 Nylon 12, Dry require a different balance of dimensional stability, tensile strength, and low extractable content because push-to-connect fittings impose continuous circumferential compression on the outer surface. The applicable standards for this segment include ISO 14743:2019 for push-in connector interchangeability and ISO 6358-1:2013 for flow-rate determination; where compressed air purity is specified under ISO 8573-1:2010, the compound is selected only when no plasticizer exudation is detectable by FTIR after 72 h at 70 °C. Formulation addition ratio for single-wall pneumatic tubing is based on 100 wt% virgin Grilamid L 25 W 40; ultraviolet-stabilised carbon black masterbatch is added at 2.0–2.5 wt%, and antistatic masterbatch is introduced at 8–12 wt% only when surface resistivity below 10^9 Ω is required under IEC 60093. The extrusion line uses a single-screw extruder with 25:1–30:1 L/D, grooved feed section, melt screen pack 60/100 mesh, melt temperature 230–250 °C, internal air cooling with pressure dew point below -25 °C, and closed-loop vacuum calibration at -0.2 to -0.6 bar. Finished products in this segment include 4–16 mm outside-diameter pneumatic control lines, push-to-connect tube, compressed air distribution lines, and vacuum tubing for automated manufacturing cells. A critical limitation is that undried masterbatch can raise moisture above 0.10 wt% during blending; therefore all masterbatches must be dried at 80–100 °C for 4–6 h before addition.
During single-lumen catheter shaft extrusion, the principal process conflict is the narrow window between melt temperature high enough for sink draw and low enough to prevent hydrolytic degradation of the PA12 backbone in the presence of trace moisture. For Grilamid L 25 W 40 medical-sector processing, compliance evidence is typically compiled under ISO 10993-5:2009 for cytotoxicity, ISO 10993-10:2010 for irritation and sensitisation, ISO 13485:2016 for cleanroom manufacturing, and USP Class VI when the device requires systemic injection-route testing. Formulation addition ratio is restricted to 100 wt% virgin Grilamid L 25 W 40; barium sulfate radiopaque masterbatch is loaded at 20–30 wt% when fluoroscopic visibility is required; colour masterbatch is limited to 0.5–2.0 wt%; external lubricants and slip additives are kept below 0.5 wt% to avoid loss of bond strength in radiofrequency welded joints. Downstream catheter production uses a 19 mm/24:1 L/D medical micro-extruder with gear pump, laser micrometer closed-loop diameter control, air gap 5–15 mm, chilled water quench at 10–20 °C, and in-line annealing at 80–100 °C for 2–4 h to stabilise crystallinity and reduce post-extrusion shrinkage. Terminal device categories include cardiovascular catheter shafts, delivery system jackets, fluid management tubing, and balloon catheter tubing. An operational boundary is that the use of regrind in the blood-contact layer is not recommended, and any switch to amine-based heat stabilizers must be excluded without additional cytotoxicity screening; published data for this specific medical configuration is limited, so extraction testing under ISO 10993-18:2020 should be repeated per formulation change.
| Medical-sector test | Standard designation | Measurement boundary |
| Cytotoxicity | ISO 10993-5:2009 | Quantitative MTT assay on L929 cells |
| Irritation and skin sensitisation | ISO 10993-10:2010 | Closed-patch and local lymph node assay |
| Chemical characterisation | ISO 10993-18:2020 | GC-MS and LC-MS extractables screen |
| Residual moisture | ISO 15512:2019 | below 0.10 wt% at time of extrusion |
| Radiopaque loading | 20–30 wt% BaSO4 | Dispersion verified by micro-CT or X-ray image uniformity |
The principal conflict in optical fibre buffer tube production is dimensional control of post-extrusion shrinkage and excess fibre length, because small deviations change attenuation under low-temperature cycling. Standards for this segment include IEC 60794-1-21:2021 for mechanical test methods, Telcordia GR-20-CORE for generic requirements for optical fibre and cable, and ISO 4892-2:2013 for accelerated weathering of outdoor cable jackets. Formulation addition ratio for loose-tube buffer compounds based on Grilamid L 25 W 40 is characterised by 2.0–2.5 wt% carbon black masterbatch, 0.3–0.6 wt% antioxidant masterbatch, and 0.5–1.0 wt% acid scavenger; regrind is excluded from fibre-contact layers and limited to 10 wt% in non-contact jacket layers only if melt volume-flow rate deviation under ISO 1133-1:2022 remains below 15%. Downstream processing employs a 65 mm/30:1 L/D single-screw extruder, melt temperature 235–250 °C, gel-filling chamber, hot-water trough at 40–60 °C, capstan tension 1.0–3.0 N, and excess fibre length control in the range 0.2–0.5%. Terminal products include loose tube buffer tubes, central strength members, microduct cable inner sheaths, and indoor-outdoor drop cable jackets. A processing boundary is that cooling water temperature below 40 °C can freeze in excessive axial orientation and produce shrinkage above 0.5% during cable heat cycling.
Subsea control lines and hydraulic sheaths expose Grilamid L 25 W 40 to methanol, seawater, and hydrostatic pressure, making chemical resistance and crush resistance the primary design filters. The normative framework includes ISO 13628-5:2021 for subsea umbilical design, API 17E for specification of subsea control lines, and NORSOK M-710 for non-metallic material qualification in sour service when applicable. Formulation addition ratio in this sector is dominated by the outer sheath function, with 100 wt% virgin Grilamid L 25 W 40 extruded at wall thicknesses of 1.0–2.5 mm over welded stainless steel tube; 2.0 wt% carbon black masterbatch is added for thermal and ultraviolet stability; buoyancy-modifying glass microspheres are incorporated at 15–30 wt% only in specifically engineered low-density sheaths. Downstream equipment uses a 90 mm/30:1 L/D extruder with crosshead die, tube preheating at 100–140 °C, annulus vacuum at -0.4 bar, multi-stage cooling from 60 °C to 30 °C, and an ultrasonic thickness scanner with 0.1 mm resolution. Finished products include hydraulic control jumpers, methanol injection lines, electrical flying leads, and chemical injection lines. Operational limitation: long-term performance data for Grilamid L 25 W 40 in pure methanol at 60 °C are available in supplier chemical resistance tables, but for continuous service above 80 °C published data for this specific configuration is limited; avoid prolonged contact with concentrated oxidising acids.
Because migration limits for food-contact nylons are governed by European Union Regulation (EU) No 10/2011 and FDA 21 CFR 177.1500, Grilamid L 25 W 40 is confined to single-layer beverage and liquid-transfer tubing where the specific compound is covered by a documented conformity declaration. The applicable overall migration limit under EU 10/2011 is 10 mg/dm² for food contact surfaces, and the relevant FDA section addresses nylon resins with extraction limits specific to the monomers used. Formulation addition ratio is 100 wt% virgin resin; processing aids are limited to below 0.3 wt%; regrind is excluded unless produced from the same compliant production run and validated through migration testing. Extrusion is performed on a single-screw extruder with melt temperature 230–245 °C, water quench, and post-extrusion hot rinsing at 80 °C to reduce low-molecular-weight surface extractables. Finished products include coffee machine tubing, beverage dispensing lines, water filtration connector tubing, and short-run dairy transfer lines. The main incompatibility is with organic solvents and ketones used in aggressive cleaning-in-place regimes; long-term contact with such cleaning agents can plasticize the surface and alter migration behaviour.
Competitive EMS-Grivory Grilamid L 25 W 40 Nylon 12, Dry 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 L 25 W 40 is a polyamide 12 (PA12) compound supplied in dry condition, with residual moisture controlled below 0.10% by weight when the original foil liner is intact. The grade belongs to the Grilamid L family and is differentiated from unmodified PA12 by the W 40 package, which introduces a plasticizer formulation, heat stabilization, and light stabilization. In the dry state, the material is intended for melt-phase conversion; exposure to ambient humidity above 60% RH during open-container handling can raise surface moisture and alter rheology. Because the PA12 main chain contains 11 methylene units between amide groups, water absorption, density, and low-temperature impact behaviour differ from short-chain polyamides such as PA6 and PA66.
The following table summarizes representative dry-state values published in EMS technical literature for this grade. The values are provided for material selection and are not specification limits.
| Property | Test standard | Typical value, dry/as-supplied |
|---|---|---|
| Density | ISO 1183-1 | 1.01 g/cm³ |
| Moisture content, as-packaged | ISO 15512 | ≤ 0.10 % by weight |
| Melt volume-flow rate | ISO 1133-1 at 275°C/5 kg | 18–22 cm³/10 min |
| Melting point, DSC | ISO 11357-3 | 172–177 °C |
| Vicat softening temperature, A50 | ISO 306 | 128–135 °C |
| Tensile modulus, dry | ISO 527-1/-2 | 350–450 MPa |
| Yield stress, dry | ISO 527-1/-2 | 16–20 MPa |
| Nominal strain at break, dry | ISO 527-1/-2 | > 50 % |
| Charpy notched impact strength, 23°C | ISO 179-1/1eA | no break |
| Shore D hardness | ISO 868 | 55–60 |
| Water absorption at saturation, 23°C | ISO 62 | 1.3–1.5 % |
The values in the table are typical ranges from EMS technical documents and are not upper or lower specification limits. Lot-specific certificates of analysis control melt volume-flow rate and moisture, while mechanical values depend on specimen conditioning and cavity pressure. Conditioned specimens at 23°C/50% RH show lower modulus and yield stress because absorbed water behaves as a secondary plasticizer. Published data for this specific configuration is limited for notched Charpy impact below -40°C; for such service, a sub-ambient impact study on the finished article is required.
The W 40 modification operates through a plasticizer package rather than an external lubricant bloom. In the dry state, the plasticizer resides in the amorphous regions of the PA12 network, reducing interchain hydrogen bonding and increasing free volume. Under ISO 527-1/-2 tensile loading at 1 mm/min, the result is a tensile modulus below 450 MPa, whereas unmodified Grilamid L 25 typically lies above 900 MPa in dry specimens. The reduction in interchain friction also lowers melt viscosity; in capillary rheometry per ISO 11443, the plasticized system exhibits lower zero-shear viscosity and a shear-thinning onset shifted to lower shear rates. At 1000 s⁻¹, the flow curve flattens, permitting lower pressure drop per die length, but the same free-volume increase reduces melt strength during free-surface extrusion.
On production lines used for 4 mm to 8 mm pneumatic tube, two recurring failure modes are melt fracture and die drool. Melt fracture appears as a rough, matte surface at haul-off speeds above 50 m/min on a 30 mm single-screw extruder with L/D 24 when die temperature falls below 190°C. Raising the die zone by 10°C while lowering the compression zone by 10°C restores surface gloss without exceeding the 230°C melt limit. Die drool, caused by low-molecular-weight fractions and plasticizer migration, accumulates at the die lip within 2–4 h; a bronze wire brush and intermittent purge with a low-viscosity PA12 purge compound control the build-up.
For extrusion of flexible tubing, a single-screw extruder with L/D 24–30 and a compression ratio of 2.5:1 to 3.0:1 is used. Barrel zones are typically set between 180°C and 220°C, with die temperature maintained at 200–220°C. Melt temperature measured by immersion probe should remain below 230°C; residence time above 240°C causes progressive plasticizer volatilization, surface roughness, and odour. Production lines operated with closed-loop haul-off speed control maintain outer diameter tolerance of ±0.05 mm on 6 mm tube. Injection moulding of fittings and connectors is possible at a melt temperature of 200–240°C, a mould temperature of 20–40°C, and a screw-back pressure of 4–8 bar. The low melt viscosity allows filling of thin walls down to 0.5 mm at injection speeds of 80–120 mm/s.
If opened pellets are exposed to ambient air at 23°C/60% RH for more than 8 h, surface moisture can exceed 0.10%. In that condition, splay, foaming, and loss of melt fracture control are reported in pipe and tubing extrusion. Re-drying in a desiccant dryer at 80°C for 4–6 h with inlet air dew point ≤ -40°C restores process stability. Vacuum oven drying at 80°C under 100 mbar for 6 h is an alternative for small lots. Regrind from spools and edge trim should be re-dried to 0.10% and limited to 20% by weight unless production trials demonstrate equivalent viscosity. Moisture level should be confirmed by Karl Fischer titration per ISO 15512 or by a calibrated moisture analyser.
Flexible pneumatic tubing, cable protective sheathing, and low-pressure fluid conduits are representative applications because the grade combines a dry Shore D hardness of 55–60 with high elongation. In pneumatic service, burst pressure is controlled by minimum wall thickness and fitting retention force rather than by the short-term tensile strength alone; the final assembly is validated under the applicable customer pressure-impulse and vibration schedule. The material is also used where low-temperature flexibility and low moisture absorption are required in external cable conduits and spiral wraps. Outdoor weathering of black compounds is typically evaluated per ISO 4892-2 using xenon-arc exposure; surface chalking after 1000 h is assessed against the end-user acceptance threshold.
Although Shore D hardness in the dry state is commonly used as a quick incoming check, it does not describe the ductile-to-brittle transition that separates this grade from unmodified Grilamid L 25. Under ISO 179-1/1eA Charpy testing, unmodified PA12 tends to show semi-ductile or brittle failure at -20°C, whereas the W 40 formulation shifts ductile response toward -40°C. The dry tensile modulus is reduced by roughly 40–60% compared with unmodified Grilamid L 25. In humid end-use conditions, the modulus difference narrows because the unmodified grade absorbs more of the available moisture effect relative to its higher dry-state stiffness.
Against PA6 and PA66, the PA12 backbone of this grade provides lower saturated water absorption under ISO 62—approximately 1.3–1.5% versus 8.5–9.5% for PA66—and lower density at 1.01 g/cm³ compared with 1.13–1.14 g/cm³ for PA66. These differences reduce dimensional change in humid environments and improve resistance to zinc chloride salt solutions, a known stress-cracking agent for PA66 in automotive underbody clips. In dimensional stability testing, parts moulded from dry pellets and then conditioned at 23°C/50% RH generally exhibit a linear expansion below 0.10%, while PA66 can reach higher expansion under the same moisture uptake. Against polyamide 11, the main differentiation is the melt temperature and monomer source; both offer low water absorption, but the PA12 grade described here is processed at a lower melt temperature and is supplied with a defined dry-state moisture content.
The material should not be blended with unmodified PA66 regrind at levels above 5% because phase separation can occur during slow cooling; if higher regrind levels are needed, a compatibilized masterbatch and thermal analysis per ISO 11357-3 are required. When machine colouring, use a PA12-based colour masterbatch with a carrier melt volume-flow rate within ±10% of the base resin to prevent visible streaking in thin-wall tube. Avoid long hold-up at melt temperatures above 240°C, and avoid contact with strong acids and strong oxidizing agents because these can degrade the plasticizer package. In fuel or oil contact, the grade should be evaluated according to ISO 1817 or the end-user fluid immersion specification; because plasticizer can be extracted by aggressive hydrocarbon blends, the final tubing must be tested with the actual service fluid at the maximum operating temperature.
Documentation for the product includes a REACH registration statement under Regulation (EC) No 1907/2006 and a supplier declaration for RoHS 2011/65/EU including delegated directive (EU) 2015/863. Food-contact status falls under FDA 21 CFR 177.1500 for nylon resins and must be verified on the finished article because migration levels depend on contact time, temperature, and surface-to-volume ratio. Final compliance with EC 10/2011 requires migration testing on the article as placed on the market. The product is normally packed in 25 kg foil-lined bags or octabins, with the dry condition guaranteed from the date of manufacture for the period declared by EMS-Grivory.
