| HS Code | 899175 |
| Density | 1.23 g/cm³ |
| Melting Point | 178 °C |
| Tensile Modulus | 3000 MPa |
| Tensile Strength At Yield | 45 MPa |
| Elongation At Break | 15% |
| Flexural Modulus | 2700 MPa |
| Charpy Impact Strength At 23 C | 50 kJ/m² |
| Izod Notched Impact Strength | 5 kJ/m² |
| Vicat Softening Temperature | 170 °C |
| Heat Deflection Temperature At 1 8 Mpa | 150 °C |
| Water Absorption At Saturation | 1.3% |
| Glass Bead Content | 30% |
As an accredited Evonik Vestamid L1930 30% Glass Bead Filled Nylon 12 factory, we enforce strict quality protocols—every batch undergoes rigorous testing to ensure consistent efficacy and safety standards.
| Packing | Evonik Vestamid L1930 30% glass bead filled nylon 12 is supplied as 25 kg sealed bags, ensuring dry, contaminant-free delivery. |
| Container Loading (20′ FCL) | Loading 20′ FCL of Evonik Vestamid L1930 nylon 12 in bags/pails, secured and palletized for safe transit. |
| Shipping | Evonik Vestamid L1930 (30% glass bead filled nylon 12) ships as moisture-sensitive pellets in sealed bags. Keep dry, protect from humidity, and store away from heat sources. Non-hazardous, no special transport requirements, but use covered, ventilated transport to prevent condensation and contamination. |
| Storage | Store Evonik Vestamid L1930 in a cool, dry, well-ventilated area, away from direct sunlight, heat, and ignition sources. Keep containers tightly sealed to prevent moisture absorption, which can affect processing. Avoid exposure to excessive humidity and temperatures above 50°C. Maintain good housekeeping to prevent dust accumulation and follow local regulations for polymer storage. |
| Shelf Life | Store in original sealed container, cool dry area. Shelf life is typically 2 years from manufacture date. |
In direct-to-patient orthotic shell production, Evonik Vestamid L1930 PA 12-GB30 is introduced as a pre-dried single-component compound with the glass bead loading fixed at 30 wt%. The relevant biological evaluation procedures for a skin-contacting polyamide 12 device are ISO 10993-1:2018 for risk assessment, ISO 10993-5:2009 for cytotoxicity, and ISO 10993-10:2021 for sensitization and closed-patch irritation. Documentation under EU MDR 2017/745 is maintained for Class I reusable body-contact devices with cumulative contact duration exceeding 24 h. For the formulation ratio, no secondary glass bead addition is performed because the grade is supplied at full filler loading. In-house regrind from sprues and rejected shells is limited to 20 wt% in virgin granules; when the regrind fraction exceeds this value, tensile modulus retention under ISO 527-2:2012 falls below 95% of the as-supplied value and batch-to-batch dimensional variance increases. Colour masterbatch, when used, is metered at 1.0–2.0 wt% and pre-dried to ≤0.12 wt% moisture. Production on a 400-tonne hydraulic clamp injection-compression press uses split moulds with shear edges, barrel zone settings of 230–250 °C, 250–270 °C, 255–275 °C, and a nozzle setpoint of 260–280 °C. The mould temperature is held at 70–80 °C to suppress differential shell contraction and to keep post-mould shrinkage below 0.6% in both flow and transverse axes measured under ISO 294-3:2020. Residual moisture before processing is maintained below 0.10 wt% using a dehumidified hopper with a dew point not above −35 °C. Finished parts include structural reinforcement strips, vacuum-formed outer shell covers, prosthetic socket brims, anterior ankle-foot orthosis bodies, and prefabricated footplate base frames with integrated strap slots.
| Document/standard | Clause or method | Boundary applied to Vestamid L1930 |
|---|---|---|
| ISO 10993-1:2018 | Biological risk assessment framework | Reusable skin-contact shell, cumulative contact > 24 h |
| ISO 10993-5:2009 | Cytotoxicity by extraction | L929 cell survival not less than control-defined threshold |
| ISO 10993-10:2021 | Sensitization and closed-patch irritation | No delayed dermal hypersensitivity in skin-contact region |
| EU MDR 2017/745 | Annex VIII classification Rule 1 | Non-invasive device, reusable, continuous duration > 24 h |
| ISO 10993-23:2021 | In vitro irritation testing | Optional skin irritation endpoint for formulation change control |
Automotive interior programmes specify PA12-GB30 for clip-fastened modules where mid-range modulus, low directional shrinkage, and long-term humidity stability are simultaneously required. The dimensional tolerance budget is based on part measurement after 48 h at 23 °C and 50% RH under ISO 291:2008 condition class 2. Under IATF 16949:2016, production part approval includes dimensional capability studies demonstrating Cpk not below 1.67 for critical-to-fit datums. REACH Candidate List screening and ELV Directive 2000/53/EC Annex II documentation are mandatory before series production. The moulding feed consists of 100 kg batches of PA12-GB30 granules; regrind is allowed up to 20 wt% because instrument panel retention brackets are validated for impact retention only at that ratio, while colour masterbatch is metered at 1.2–2.0 wt%. The downstream process uses a 350-tonne all-electric injection moulding machine with a 50 mm barrier screw, L/D 22:1, and a closed-loop hot runner system. Barrel temperatures are set at 235 °C in the feed zone, 250 °C in the transition zone, 260 °C in the metering zone, and 265 °C at the nozzle. Mould setpoint is 80 °C; below 75 °C, weld lines at boss bases become brittle under screw assembly torque. Injection speed is profiled at 45–55 mm/s, followed by 0.8 s hold at 600 bar. Screw back pressure is maintained at 60 bar to minimize glass bead segregation, screw rotation is kept at 100–120 rpm, and total residence time is limited to 7 min to prevent thermo-oxidative viscosity drift. Finished parts include dashboard cluster housings, centre console brackets, HVAC control mounting plates, air vent sealing frames, and multi-function switch bezels.
| Processing variable | Setpoint window | Measurement method | Observed failure outside window |
|---|---|---|---|
| Hopper dew point | −40 °C to −35 °C | Dew-point meter at feed throat | Moisture absorption above 0.15 wt% producing splay |
| Residual moisture | ≤0.10 wt% | ISO 15512:2019 Karl Fischer | Hydrolytic molecular weight loss and reduced weld strength |
| Melt temperature | 255–275 °C | Infrared temperature probe at nozzle | Glass bead attrition affecting impact repeatability |
| Mould temperature | 75–85 °C | Tool thermocouple network | Cross-axis shrinkage above 0.6%, gloss mismatch |
| Back pressure | 50–70 bar | Machine hydraulic sensor | Shot weight variation exceeding 0.5% |
| Shot-to-shot mass variation | ≤0.5% | Statistical process control scale | Dimensional capability Cpk below 1.67 |
For compressed-air distribution manifolds operating at plant air pressure below 10 bar, Evonik Vestamid L1930 PA 12-GB30 is processed into valve island housings and modular connection blocks where dimensional consistency is more critical than absolute tensile strength. The governing standards are ISO 4414:2010 for pneumatic system design and ISO 8573-1:2010 for compressed-air quality classification. The formulation is used at 100 parts by weight as supplied; regrind content is restricted to 15 wt% because repeated heat histories increase glass bead agglomeration and create surface pinpricks on sealing faces. No external mould-release agent is permitted because the deposit migrates to valve cartridge seals and causes pneumatic leakage. Production is conducted on a 180-tonne hydraulic injection moulding press with thin-wall filling down to 1.2 mm nominal wall section. Barrel temperatures are set from 240 °C at the feed throat to 270 °C at the nozzle, and the mould is held at 60–70 °C. Flow length-to-thickness ratio is kept below 150:1 because glass bead orientation freezes in extended flow and produces microgrooves along the weld line. Manifold halves are joined by ultrasonic welding at 20 kHz with amplitude 60 µm and hold time 0.4 s. Ingress protection is verified under IEC 60529:2013 at IP65 for assembled valve islands. Finished products include modular valve island bodies, silencer housings, pressure gauge enclosures, and electro-pneumatic regulator mounts.
Optical and machine vision housing covers are produced from PA12-GB30 because the spherical glass bead morphology reduces distortion compared with short-glass-fibre PA12 while retaining sufficient rigidity for lens alignment. The regulatory envelope includes IEC 61010-1:2010/AMD1:2016 for electrical instrument enclosures, RoHS Directive 2011/65/EU with technical documentation retained for Annex III exemptions where applicable, and ISO 9022-1:2016 for environmental testing of optical instruments. The feedstock remains at 100 wt%; regrind is not allowed in visible surface components because multiple melt histories cause local glass bead agglomerates that appear as surface relief after polishing. When a matte finish is required, 0.8–1.5 wt% of PA12-compatible matting batch is added. The downstream process uses a 250-tonne high-speed injection press with polished SPI-SPE A2 tool surfaces and sequential valve-gated hot runner using four drops. Mould temperature is held at 85 °C, and cooling time for a 3.5 mm nominal wall is set to 35 s. Post-mould conditioning at 80 °C for 4 h in recirculating air relieves internal stress before anti-static coating. Flatness across a 200 mm span is verified with a dial gauge and held below 0.15 mm. Cleaning resistance is qualified against pH 9 alkaline detergent at 40 °C for 200 h under ISO 175:2010; exposure to methanol-based cleaners above 50 °C is an operational boundary because stress cracking can initiate at gate vestiges. Finished parts include lens hood bodies, camera enclosure frames, touch-screen bezel frames, photoelectric sensor housings, and bar-code reader chassis components.
Precision dosing pump heads for chlorinated water treatment and mild acid delivery are converted from Evonik Vestamid L1930 PA 12-GB30 where unfilled PA12 lacks creep resistance and short-glass PA12 creates anisotropic seal face distortion. Under ISO 175:2010, qualification includes immersion in 10 vol% sodium hypochlorite at 23 °C for 90 days; published data for this specific grade and fluid combination is limited, so production validation is extended to the actual service fluid at 40 °C for 500 h. The formulation is introduced at 100 wt%, and regrind is limited to 10 wt% only in non-pressure-retaining covers because pump heads represent pressure boundaries. Injection moulding on a 120-tonne press with a 30 mm high-compression screw produces pump head bodies at a shot weight of 85 g. Hydraulic pack pressure is maintained at 850–950 bar to reduce sink at the suction port boss. Mould tooling is built from hardened P20 steel with polished cores. After moulding, wetted ports are machined to Ra 0.8 µm and checked for porosity under 6 bar air. The material should not be combined with concentrated phenol-based disinfectants or strong organic acids above 60 °C, because polyamide 12 swells and loses pressure-retention capability. Finished parts include diaphragm back plates, dosing pump housings, valve retainers, strainer caps, and suction-side manifold bodies.
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VESTAMID L1930, supplied by Evonik Operations GmbH, is an injection-moulding compound based on polyamide 12 (PA12) containing 30 wt% spherical glass beads. Under ISO 1043, the material can be described as PA12 GB30, where GB denotes glass beads. The glass beads are low-aspect-ratio fillers; this characteristic separates the grade from short glass fibre reinforced PA12 compounds and from mineral-filled PA6 or PA66 grades that may have higher water absorption. The melt temperature of the PA12 matrix is approximately 176 °C when measured by differential scanning calorimetry to ISO 11357-3. The product is specified for moulded components that require low warpage, isotropic mould shrinkage, stable dimensions under variable relative humidity, and reduced abrasion in processing equipment. The physical form is standard pellet feed with a natural or black colour depending on the supply code; the natural version is not UV-stabilised and is not intended for long-term outdoor exposure.
In dry-as-moulded test specimens, the density is approximately 1.23 g/cm³ when tested to ISO 1183-1. The addition of 30 wt% glass beads raises the density by roughly 0.2 g/cm³ relative to unfilled PA12. The filler loading also reduces the coefficient of linear thermal expansion from approximately 1.1 × 10⁻⁴ K⁻¹ for unfilled PA12 to approximately 0.9 × 10⁻⁴ K⁻¹ over the 23–55 °C interval measured to ISO 11359-1/-2. This decrease is smaller than the orientation-direction decrease obtained with a 30 wt% short glass fibre PA12, but it is accompanied by lower planar anisotropy. The difference is critical in parts with circular bores, snap-fit arrays, and flat sealing faces.
Glass beads do not orient strongly with the melt front during cavity filling. As a result, the mould shrinkage difference between flow and transverse directions in VESTAMID L1930 is generally smaller than in short glass fibre PA12. Supplier data for moulding shrinkage according to ISO 294-4 show values near 0.8–1.0 %, with the exact value depending on wall thickness, gate geometry, and holding pressure. The spherical filler also creates a smoother moulded surface than fibre-reinforced grades; exposed fibre ends are absent, which improves laser marking contrast and reduces the risk of skin irritation in handled parts. Tribologically, the glass bead filled melt is mildly abrasive but significantly less tool-aggressive than a comparable glass fibre filled PA12. In high-cavitation tools, this difference can extend tool steel life and reduce the frequency of vent cleaning.
Impact performance is directionally more uniform than in glass fibre PA12. The notched Charpy impact strength at 23 °C is approximately 5 kJ/m² when tested to ISO 179-1/1eA. At sub-zero temperatures, PA12 retains more ductility than PA6 or PA66, but glass bead fillers reduce the elongation at break. Users should validate impact requirements at the minimum service temperature using the actual part geometry rather than relying solely on small-specimen data.
The values below are reproduced from supplier-published typical property ranges and are not specification limits. Dry-as-moulded test specimens were prepared according to ISO 294-1 and stored in a desiccator before testing. Conditioned specimens tested at 50 % RH will generally show lower tensile modulus, lower yield stress, and higher elongation at break. Specific values for some application conditions are not published; user qualification remains required.
| Property | Test standard | Typical value |
|---|---|---|
| Density at 23 °C | ISO 1183-1 | 1.23 g/cm³ |
| Water absorption, 23 °C, 50 % RH equilibrium | ISO 62 | 0.5 % |
| Tensile modulus, 1 mm/min | ISO 527-1/-2 | 1,700 MPa |
| Tensile yield stress, 50 mm/min | ISO 527-1/-2 | 38 MPa |
| Nominal strain at break, 50 mm/min | ISO 527-1/-2 | 20 % |
| Charpy notched impact strength, 23 °C | ISO 179-1/1eA | 5 kJ/m² |
| Heat deflection temperature, 1.8 MPa | ISO 75-1/-2 | 55 °C |
| Heat deflection temperature, 0.45 MPa | ISO 75-1/-2 | 110 °C |
| Melting temperature, DSC second heat | ISO 11357-3 | 176 °C |
| Moulding shrinkage, parallel | ISO 294-4 | 0.8–1.0 % |
The heat deflection temperature under 1.8 MPa is governed by the PA12 matrix and is below the value commonly reported for PA6-GB30. A user that requires a higher short-term thermal resistance may need to consider glass fibre reinforced semi-aromatic polyamides or an alternative polymer family. The glass bead filler increases thermal conductivity relative to unfilled PA12, but the magnitude is not sufficient to justify aggressive reductions in cooling time without mould-filling simulation. Water absorption at saturation at 23 °C is typically 1.0 % when tested to ISO 62. Owing to the hydrophobic character of the C12 aliphatic chain, this is below the saturation uptake of PA6 and PA66. The combined effect of moisture and glass beads is not linear: the glass bead–matrix interphase may adsorb water preferentially, lowering the practical benefit of the PA12 matrix if the bead coating is hydrophilic. For this reason, dimensional checks on parts that will be stored in uncontrolled warehouses should be performed after conditioning, not immediately after moulding.
Prior to moulding, VESTAMID L1930 pellets should be dried in a desiccant-air dryer at 80 °C for 4–6 h to a residual moisture content below 0.1 %. At relative humidity above 60 %, opened material should not be left in unsealed hoppers; hold times should be limited to 30 min and dried pellets should be conveyed by dry-air lines. Melt temperature at the nozzle is typically maintained between 220 °C and 260 °C, with the lower range used for thin-walled parts that require high shear heating and the upper range used for long flow lengths or high holding-pressure requirements. Mould temperature is set between 40 °C and 80 °C. A mould temperature in the range of 60–80 °C improves surface gloss, crystallinity, and dimensional stability but increases cooling time. General-purpose three-zone screws with an L/D ratio of 18:1–25:1 and a compression ratio of 2:1–3:1 are commonly used. Back pressure should be kept low enough to avoid excessive filler attrition; moderate screw speeds are preferred because the spherical filler can cause melt-temperature overshoot in small barrels.
Excessive shear or residence time above 260 °C can degrade the PA12 matrix and produce silver streaks. If the moulding cycle is interrupted, the barrel temperature should be reduced to 180 °C to limit thermal degradation. Hot-runner systems used with this grade should avoid dead spots because glass beads can accumulate in stagnation zones and cause progressive flow imbalance. Valve-gated hot runners are preferred over open tips for multi-cavity tools with tight shot-weight variation. When regrind is reused, the proportion should be kept below 25 wt% for dimensionally critical parts unless the moulder has validated the effect of repeated heat history on melt viscosity and bead breakage. Incoming inspection should record melt volume-flow rate and ash content; the glass bead loading can be checked by thermogravimetric analysis or ISO 3451-4.
Selection of VESTAMID L1930 instead of a 30 wt% short glass fibre PA12 is generally made to reduce anisotropic shrinkage and surface roughness. In a short glass fibre grade, flow-direction shrinkage can be as low as 0.2 %, while transverse shrinkage can exceed 0.6 %; the resulting strain mismatch can produce bowing in flat covers. Because the glass beads are nearly spherical, VESTAMID L1930 exhibits a more uniform shrinkage field and lower warpage. The trade-off is a lower tensile modulus and a lower flow-direction notched impact strength. Unfilled PA12 grades have higher elongation and impact at moderate thickness but lower modulus, higher thermal expansion, and greater moisture-induced dimensional change. Therefore the glass bead grade is used where the unfilled polymer lacks stiffness and the short glass fibre grade lacks flatness or surface quality.
Glass bead filled PA12 is not a direct substitute for fibre reinforced PA12 in snap-fit arms under high repeated deflection; the lower elongation and lower tensile modulus require thicker sections. Conversely, for press-fit bushings, the isotropic shrinkage improves roundness retention. Laser through-transmission welding can be limited by the scattering effect of glass beads. If the process requires a laser-transparent partner, the unfilled PA12 partner or a low-glass-bead content grade should be qualified. The bead-filled partner can serve as the absorbing side when carbon black is present. Ultrasonic and hot-plate welding are viable when joint design accounts for the shorter elongation at break.
Applications in production-equipment environments include pump housings, actuator covers, sensor bodies, cable clips, and connector frames. The PA12 matrix provides good resistance to aliphatic hydrocarbons, automotive oils, and many greases; compatibility with ethanol-containing fuels, biodiesel, and aggressive engine coolants should be validated in the final part. Natural grades are not suitable for continuous outdoor exposure without UV stabilisation. Electrical insulating properties depend on moisture content and surface contamination; comparative tracking index and dielectric strength should be measured on moulded parts, not on raw pellets. For regulatory compliance, the supplier should provide a lot-specific certification under RoHS Directive 2011/65/EU and REACH Regulation (EC) No 1907/2006. Food-contact and medical suitability must be verified case-by-case; PA12 may be covered by FDA 21 CFR 177.1500 or EU Regulation (EU) No 10/2011, but the glass bead surface treatment and the final colour package may not be included in those clearances.
