| HS Code | 686477 |
| Density Dry | 1.01 g/cm³ |
| Melting Point | 178 °C |
| Tensile Strength At Yield Dry | 45 MPa |
| Tensile Modulus Dry | 1200 MPa |
| Elongation At Break Dry | 250 % |
| Charpy Notched Impact Strength Dry At 23c | 5 kJ/m² |
| Shore Hardness Dry | D 75 |
| Vicat Softening Temperature | 145 °C |
| Heat Deflection Temperature At 0 45 Mpa | 110 °C |
| Water Absorption At Saturation 23c | 1.5 % |
| Mold Shrinkage | 1.2 % |
| Relative Volume Swell In Water | 0.7 % |
As an accredited Evonik Vestamid L1700 nf (dry properties) Nylon 12 factory, we enforce strict quality protocols—every batch undergoes rigorous testing to ensure consistent efficacy and safety standards.
| Packing | Evonik Vestamid L1700 nf Nylon 12 is packaged in 25 kg moisture-protected bags, dry pellets ready for use. |
| Container Loading (20′ FCL) | 20′ FCL: Palletized nylon 12 granules loaded dry, secured, full container utilization, safe, stable for transport. |
| Shipping | Evonik Vestamid L1700 NF (Nylon 12) ships as a non-hazardous thermoplastic powder/pellet. Use moisture-proof sealed bags or drums to prevent moisture uptake. Keep dry, avoid excessive heat and direct sunlight. No special transport classification required, but protect from mechanical damage during handling and transit. |
| Storage | Store in a cool, dry, well-ventilated area, ideally below 30°C, in tightly sealed original packaging to prevent moisture absorption. Protect from direct sunlight, UV radiation, and ignition sources. Avoid exposure to air and high humidity, as nylon 12 is hygroscopic; keep away from oxidizers and excessive heat to maintain dry properties. |
| Shelf Life | Shelf life is stable for several years when stored sealed, dry, and cool; protect from moisture to preserve properties. |
Vestamid L1700 nf is processed in automotive underhood electrical connector shells, harness clips, and sensor brackets as a natural-colour, low-viscosity PA12 injection-moulding grade whose published mechanical values refer to the dry-as-moulded condition. In production tools with 12 to 24 cavities, hot-runner valve gates, and clamp forces between 600 kN and 1,200 kN, the material is held at melt temperatures from 230°C to 250°C. Flat barrel profiles and a nozzle setpoint below 255°C are used to avoid local overheating; nozzle excursion above 260°C produces brown streaking at the gate and reduces elongation at break measured on as-moulded plaques to ISO 527-2/1A. Dry-state tensile modulus is evaluated at 1 mm/min; dry samples show higher modulus and lower elongation than specimens conditioned at 23°C and 50% RH to ISO 1110. Snap-fit recovery calculations must therefore use conditioned elongation values when the part operates above 55% RH, not the dry datasheet values. Injection velocity is set between 80 mm/s and 120 mm/s for nominal walls of 1.0–1.5 mm; below 50 mm/s premature gate freeze-off increases short-shot frequency in the last-filled cavities. Back pressure is maintained at 5–15 bar to stabilise shot mass without excessive shear heating. The screw is a three-zone design with L/D of 20:1 to 22:1 and compression ratio 2.2–2.8. Drying at 80°C for 4–6 h in a desiccant dryer with dew point -30°C to -40°C lowers residual moisture below 0.1%; regrind content above 20% or ambient relative humidity above 60% without drying causes splay, silver streaks, and unstable fill. Density is 1.01 g/cm³ to ISO 1183-1. Part mass is approximately 10% lower than equivalent glass-filled PA66 at equal volume, but the lower dry-state hardness must be considered for vibration-loaded bracket interfaces.
| Residual moisture content | Observed injection moulding behaviour | Test or standard indication |
|---|---|---|
| <0.1% | Stable shot mass, no splay, uniform gate seal | Gravimetric moisture analysis; ISO 1110 condition baseline |
| 0.1–0.2% | Off-gassing at the nozzle, occasional splay at the gate, minor dimensional scatter | ISO 294-4 shrinkage specimen |
| >0.2% | Gross silver streaking, nozzle drool, embrittled weld lines | ISO 527-2 tensile, ISO 179-1 notched impact |
Weld-line strength is a limiting factor when two melt fronts meet at a pin or hole in thin clip designs. A single gate placed on one side produces a weak knit line on the opposite side of a boss; destructive testing on welded plaques to ISO 527-2 is used to establish the acceptable reduction in failure load. Published data for this specific configuration in L1700 nf is limited, so cavity-specific flow simulation and short-shot verification are required before series tooling.
Push-in fittings, release buttons, and compressed-air manifold bodies moulded from L1700 nf operate in pneumatic circuits where internal pressure typically ranges from 0.6 MPa to 1.6 MPa and dew-point cycling causes repeated condensation. The dry-as-moulded dimension of a sealing seat or O-ring groove is controlled by a mould temperature of 60–80°C and a holding pressure of 30–50 MPa, applied until the gate demonstrates freeze-off. Shrinkage anisotropy must be measured on ISO 294-4 plaques because PA12 exhibits post-mould shrinkage that continues for up to 24–48 h after ejection; immediate dimensional inspection produces false conformance. The material absorbs moisture at saturation to approximately 1.5% by mass, and prolonged exposure to saturated air at 60°C can cause bore diameters in a coupling body to shift by 0.2–0.4% depending on wall thickness; published data for L1700 nf in this specific configuration is limited, and dimensional capability studies must be performed on conditioned parts. Threaded ports and quick-release collars are moulded with thread engagement of five to six full turns; pull-out and burst tests are performed according to ISO 14743 for push-in connectors, but no universal pressure rating is assigned without geometry-specific testing. The operating temperature range in dry compressed air should be kept between -20°C and 60°C for unprotected natural PA12; exposure to compressor oil mist, persistent condensate, or aggressive drying agents above 60°C accelerates hydrolytic attack and stress cracking at the thread root.
Power tool housings, handheld appliance shells, and control grips use L1700 nf where thin-wall filling, low density, and resistance to hand oils, ester-based lubricants, and weak alkaline cleaning agents influence material selection. The resin is injected at melt temperatures from 230°C to 245°C into cold-runner tools with mould temperatures of 40–60°C. Screw bosses for self-tapping thread-forming screws are designed with a hole diameter producing 70–80% thread engagement; the outer diameter of the boss is kept at 2.2–2.5 times the screw nominal diameter to avoid split failure during assembly. Torque-to-failure values vary with screw geometry and wall thickness; no single ISO standard covers production screw pull-out, so qualification is performed under the appliance maker’s internal test protocol or by axial pull-out measurement to ISO 527-2 on machined specimens. Sink marks occur when rib thickness exceeds 50–60% of the adjoining wall; gas counterpressure or foam processing is not used because L1700 nf is a neat resin and foaming agents alter chemical resistance. Weld lines at holes and snap-fit slots degrade dry-state elongation; the dry datasheet elongation value must not be used for snap-fit design, because the component in service at 35–55% RH will gain moisture and exceed the dry elongation within two to four weeks. A two-stage holding-pressure profile with a first stage of 40–50 MPa for 1.5–2.0 times the gate-freeze time and a second stage of 15–20 MPa for 3–5 s reduces warpage in flat housing panels. Degassing and vacuum pulling are unnecessary when the resin is dried below 0.1% moisture.
End caps, permeate ports, and potting rings for hollow-fibre filtration modules are produced in L1700 nf where the dry-state dimensional stability of the resin is used before insert moulding of filament bundles. The material’s polyamide 12 backbone provides low water uptake relative to PA6 and PA66, but it is not inherently a dedicated drinking-water grade; application in potable-water contact requires separate evaluation under NSF/ANSI/CAN 61 or an equivalent market-specific regulation. In chlorinated process water, continuous-use temperature is limited to 50–65°C depending on free chlorine concentration, pH, and hydrostatic load; prolonged exposure above 65°C in oxidising conditions induces surface microcracking and loss of potting adhesion. Insert moulding is performed with melt temperature 230–250°C and a mould temperature of 80°C to maximise crystallinity at the fibre-potting interface. Lower mould temperatures below 50°C produce an amorphous skin that swells more rapidly in warm water and can delaminate at the insert. Spin welding of filter end caps uses a surface speed of 10–20 m/s under axial load; weld strength is validated by burst or tensile pull-off testing to ISO 527-2 or the filter manufacturer’s internal standard. The resin is not recommended for continuous immersion in strong mineral acids, phenols, formic acid, or high-concentration hydrogen peroxide; exposure to 0.5–5% citric acid or sodium hypochlorite solutions at ambient temperature is generally tolerated for cleaning-in-place cycles, but published L1700 nf-specific compatibility matrices are limited and require immersion testing at the service concentration.
Quick-release buckles, strap adjusters, and load-bearing clips for outdoor equipment and pet harnesses are candidates for L1700 nf when the incumbent acetal copolymer part exhibits brittle failure at -30°C or stress cracking after repeated exposure to soap-based cleaning. PA12 retains ductility in cold-temperature impact testing to ISO 179-1/1eA at -30°C, but the dry-as-moulded value must be measured before drawing comparisons; dry specimens show lower notched impact than components conditioned at 23°C/50% RH for 48 h. Assembly of snap-fit tongues and retainers should occur only after moisture conditioning because the dry part may crack at the snap latch during first assembly. Moulding is performed in single- or two-cavity cold-runner tools with clamp force above 800 kN, an injection speed of 70–110 mm/s, and a switch-over position set at 95–98% of cushion volume to prevent jetting and gate blush on latch edges. Wall thickness in the latch base is kept at 1.2–1.8 mm; thinner sections below 1.0 mm require a raised mould temperature of 70–80°C and a shorter flow length, preferably below 120 mm from the gate to the last-filled corner. Polyamide 12 has a density of 1.01 g/cm³ to ISO 1183-1, producing lower part weight than glass-filled POM when unreinforced, but the flexural modulus of dry PA12 is lower than that of POM; load-rated applications require a static load test at 2.5–3.5 times the rated load for 24 h at 40°C to confirm creep resistance. The resin is not a drop-in replacement for POM in all dimensions because the mould shrinkage of PA12 differs by 0.8–1.2% from POM, requiring tool steel modifications to side walls and hinge gaps.
Rail transit cable harness clips, routing clamps, and cable tie mounts are produced in L1700 nf for its low density and reduced water uptake compared with PA66, but dry-state notched Charpy impact at low temperature is a design input, not a guaranteed value. The material must be tested to ISO 179-1/1eA on injection-moulded plaques at -30°C, -10°C, and 23°C, because clip legs subjected to installation snap force at low temperature fail by brittle crack propagation from the weld line if the dry impact value is below the application requirement. For rail interior use, EN 45545-2 fire-smoke-toxicity testing is mandatory; unreinforced natural L1700 nf has not been certified to a specific hazard level, so the part must be assessed in its final wall thickness and colour package. Blue- or black-coloured masterbatches used for UV protection or rail livery change melt viscosity and can shift the low-temperature impact response by modifying crystallinity; each masterbatch addition above 1% requires re-testing to ISO 179-1/1eA and ISO 527-2. Mould temperature is held at 60–80°C to reduce frozen-in stress in the clip legs; a low mould temperature below 40°C produces a skin-core morphology that delaminates under repeated snap installation. Insertion force and retention extraction force are measured on a tensile fixture at 10 mm/min, with the clip mounted on a representative sheet metal edge or stud. The dry-state modulus should not be used for insertion force modelling without considering the installed environment; above 50% RH the modulus decreases and insertion force drops, which can produce retention values below specification.
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Evonik Vestamid L1700 nf is an unreinforced, medium-viscosity polyamide 12 supplied in natural colour and specified for extrusion and injection-moulding operations in which dry-as-moulded mechanical values are used as the initial design basis. The “L1700” designation reflects a viscosity number of approximately 170 cm³/g under ISO 307, placing the grade between lower-viscosity injection-moulding materials and higher-molecular-weight extrusion grades within the Vestamid L series. The “nf” suffix is associated with natural-colour, food-contact documentation, but it does not constitute a finished-article migration certificate. Dry-state values commonly referenced for first-pass design include density of 1.01 g/cm³ under ISO 1183, melting temperature of 176 °C under ISO 11357-1/-3, and saturation water uptake of approximately 1.5 wt% under ISO 62. These values position L1700 nf as a semi-crystalline polyamide with lower water absorption than PA6 or PA66, which reduces humidity-induced dimensional change and electrical property drift. Because dry modulus and yield stress are frequently used in initial simulation work, the transition from dry to conditioned properties must be treated as a design input rather than a later correction.
The dry-state tensile modulus of 1500 MPa under ISO 527-1/-2 is frequently used for initial stiffness calculations, but it is not a fixed design constant in service. In the dry-as-moulded condition, tensile stress at yield is approximately 45 MPa, nominal strain at break exceeds 50%, and notched Charpy impact strength at 23 °C is approximately 6 kJ/m² under ISO 179/1eA. Thermal values include Vicat softening temperature VST/A/50 of 160 °C under ISO 306 and heat deflection temperature B at 0.45 MPa of 110 °C under ISO 75-2/B. Table 1 consolidates representative published dry-state and conditioned values for initial material selection.
| Property | Test Method | Dry Value | Conditioned Value |
|---|---|---|---|
| Density | ISO 1183 | 1.01 g/cm³ | 1.01 g/cm³ |
| Water absorption at saturation | ISO 62 | 1.5 wt% | 1.5 wt% |
| Melting temperature | ISO 11357-1/-3 | 176 °C | 176 °C |
| Vicat softening temperature VST/A/50 | ISO 306 | 160 °C | 160 °C |
| Tensile modulus | ISO 527-1/-2 | 1500 MPa | 1100 MPa |
| Tensile stress at yield | ISO 527-1/-2 | 45 MPa | 35 MPa |
| Nominal strain at break | ISO 527-1/-2 | >50% | >50% |
| Charpy notched impact strength, 23 °C | ISO 179/1eA | 6 kJ/m² | no break |
| Heat deflection temperature B, 0.45 MPa | ISO 75-2/B | 110 °C | 110 °C |
Conditioning at 23 °C and 50% RH reduces tensile modulus from approximately 1500 MPa to approximately 1100 MPa and tensile stress at yield from approximately 45 MPa to approximately 35 MPa; notched Charpy impact strength generally moves to no-break behaviour. These shifts are reversible and repeatable, but they invalidate load-case studies that use dry-only data for snap-fit retention, clip locking force, or press-fit insertion. Parts in dry indoor service may remain near dry values for extended periods if wall thickness is high and ambient humidity is low, but published data for this specific configuration is limited, and converters should generate sorption curves for their own geometries.
Water sorption in L1700 nf is governed by the low polarity of the PA12 backbone and is lower than that of PA6 or PA66. In thin injection-moulded sections, moisture diffusion follows an approximately Fickian profile; in profiles thicker than 3 mm, through-thickness saturation can lag substantially behind surface conditioning. The practical consequence is that a moulded part tested immediately after dry-out will not represent the mechanical condition after several months in an uncontrolled warehouse. The transition from dry to equilibrium at 50% RH produces dimensional expansion in the range of a few tenths of a percent and a fall in stiffness, while the material retains ductile behaviour below -30 °C. This low-temperature ductility distinguishes PA12 from more hygroscopic aliphatic polyamides in clips, flexible tubing, and cold-impact applications. At saturation, dimensional stability in a restrained component can generate internal stress if the design does not provide clearance or strain relief.
When dry-as-moulded data are transferred to production parts without moisture correction, the most common failure mode is inaccurate snap-fit retention force. A finite element model using the dry modulus of 1500 MPa will predict a stiffer beam than the conditioned component delivers after moisture uptake; the predicted engagement force can therefore be higher than the measured assembly force after environmental exposure. Similarly, press-fit joint stress predictions based on dry yield stress may overestimate interference capability because the conditioned matrix yields at a lower stress. Injection-moulded prototypes should therefore be conditioned according to the intended service humidity, and the design verification plan should include ISO 291 conditioning and ISO 527-1/-2 tensile testing at each environmental state. Failure to include these values can produce a situation where tooling is approved against dry-state physicals and the production article fails assembly-force requirements after normal warehouse storage.
Before melt processing, L1700 nf must be dried to a moisture content below 0.1 wt%. Desiccant drying at 80 °C for 4–6 h with a dew point of -30 °C or lower is recommended by industrial drying practice. Material that has been opened and exposed to ambient air above 60% RH for more than 8 h should be re-dried; surface hydration otherwise produces splay, screw slippage, and loss of melt quality. Because PA12 is less hygroscopic than PA6, drying defects are less frequent, but the processing window can still close rapidly in humid coastal or tropical production environments.
Single-screw extrusion of L1700 nf is typically performed on screws with L/D ratios from 24:1 to 30:1 and barrier or mixing zones that distribute shear without excessive residence time. Cylinder temperatures are commonly set from 210 °C in the feed zone to 240 °C in the metering zone, with head and die temperatures between 230 °C and 250 °C. For injection moulding, barrel temperatures of 230–250 °C and mould temperatures of 40–80 °C provide sufficient crystallinity and dimensional stability; hold pressure is adjusted to pack the cavity and minimise sink. At melt temperatures above 280 °C, oxidative yellowing and molecular weight degradation become measurable as a reduction in elongation at break; below 210 °C, unmelted granules or gel particles survive the screw and produce surface defects. The effective processing window is therefore wider than some short-chain aliphatic polyamides, but residence time above 260 °C should be limited to 10 min or less under continuous production.
Injection-moulding operations on production equipment with clamp forces typical of medium-sized machines have shown that L1700 nf fills thin-wall sections more reluctantly than lower-viscosity PA12 grades, although weld-line strength is generally better. Screw recovery time increases as the viscosity number rises toward the upper part of the specification band; this affects cycle time in multicavity tools with short cooling phases. For a conventional three-zone screw, back pressure is typically held in the range of 50–100 bar, but the optimal value depends on screw diameter and colourant dispersion. In twin-screw compounding of L1700 nf with colour concentrates, distributive mixing elements should occupy only the final portion of the screw to limit shear overheating, since local shear rates above 1000 s⁻¹ can raise melt temperature beyond the degradation threshold.
Chemical exposure must be evaluated under ISO 175 or ISO 22088 when the part contacts fluids. PA12 has high resistance to diesel, engine oil, aliphatic hydrocarbons, and zinc chloride solutions, but esters, ketones, and strong acids can produce environmental stress cracking at elevated strain. Field data from fuel-line systems show that dry-state yield stress is less relevant than conditioned strain at break for chemical exposure design because the matrix is usually partially humidified in under-bonnet service. Avoid prolonged contact with concentrated hydrochloric acid, formic acid, and hot glycol-based fluids; these can swell or stress-crack the resin. Published data for this specific configuration is limited where combinations of fluid, strain, and temperature depart from standard screening conditions.
Compared with glass-fibre-reinforced PA12 grades, L1700 nf has a dry tensile modulus near 1500 MPa, whereas a 30% glass-filled PA12 typically reaches 5000–6000 MPa dry. The unreinforced grade retains higher elongation and lower abrasiveness, but creep resistance and heat deflection are lower. Compared with plasticised PA12, L1700 nf contains no intentionally added plasticizer; extractables are lower, but flexibility below -40 °C is reduced. Compared with lower-viscosity PA12 injection grades, L1700 nf offers improved melt integrity and weld-line strength at the expense of thin-wall fill. Compared with high-viscosity PA12 extrusion grades, it processes at lower head pressure but may show reduced sag resistance in very thick-walled profile extrusion. These differences should be matched to the specific manufacturing route and service environment rather than treated as a general ranking.
Typical uses include pneumatic tubing, cable sheathing, fuel-vapour lines, snap-fit closures, food-processing machine components, and machined prototypes. In dry-as-moulded form, L1700 nf is also used for small-batch production parts where dimensional stability and low water uptake are more important than absolute stiffness. For pneumatic tubing, the combination of low moisture absorption and ductile low-temperature response supports consistent dimensions across seasonal humidity variation. For cable sheathing, low moisture uptake reduces movement of plasticizer-free material and preserves surface quality in dry indoor environments.
Food-contact documentation for L1700 nf is generally supplied by the resin manufacturer with reference to FDA 21 CFR 177.1500 and EU Regulation (EU) No 10/2011. Compliance of the resin grade does not automatically apply to the fabricated article. Under (EU) No 10/2011, overall migration testing is assigned according to food simulants in Annex III; specific migration limits for additives and monomers must be checked against the finished composition. In the United States, the conditions of use in 21 CFR 176.170(c) determine the permissible food types and temperatures for nylon articles. RoHS compliance is relevant only when the end product falls under the scope of Directive 2011/65/EU, and REACH obligations under Article 33 of EC No 1907/2006 remain with the converter or importer. Table 2 summarizes the documentation hierarchy.
| Regulation or Standard | Scope | Relevance to L1700 nf |
|---|---|---|
| FDA 21 CFR 177.1500 | Nylon resins for repeat-use and single-service food-contact articles | Base-resin compliance claimed; finished-article conditions of use under 21 CFR 176.170(c) apply |
| EU Regulation (EU) No 10/2011 | Plastic materials intended for food contact | Overall migration and specific migration limit verification required on finished article |
| REACH EC No 1907/2006 | Registration, evaluation, authorisation and restriction of chemicals | Article 33 communication required above 0.1 wt% SVHC |
| RoHS Directive 2011/65/EU | Restriction of hazardous substances in electrical/electronic equipment | Applies only if final article falls under RoHS scope |
| ISO 62 | Water absorption of plastics | Saturation value used for conditioning corrections |
Because migration and extractive limits are finished-article properties, converters must retain documentation of colourant and additive packages used with L1700 nf. A natural-colour formulation without carbon black supports colour-matched compounding, but each added masterbatch becomes part of the food-contact compliance record and may alter overall migration performance. This regulatory boundary applies from the point at which the resin is converted, not from the resin manufacturer’s certificate alone.
