| HS Code | 476619 |
| Density | 1.08 g/cm³ |
| Melting Point | 185 °C |
| Glass Transition Temperature | 45 °C |
| Melt Flow Index 230 C 2 16 Kg | 4 g/10 min |
| Tensile Modulus | 1500 MPa |
| Tensile Strength At Break | 35 MPa |
| Elongation At Break | 20 % |
| Flexural Modulus | 1300 MPa |
| Charpy Impact Strength Notched 23 C | 25 kJ/m² |
| Shore D Hardness | 65 |
| Water Absorption 24 H 23 C | 2.5 % |
| Bio Based Carbon Content | 100 % |
As an accredited NaturePlast NPW SEA 252 Nylon 11 Biocomposite factory, we enforce strict quality protocols—every batch undergoes rigorous testing to ensure consistent efficacy and safety standards.
| Packing | Supplied in 25 kg sealed paper bags with PE liner, moisture-protected and nitrogen-purged for safe handling and storage. |
| Container Loading (20′ FCL) | 20′ FCL container loaded with NaturePlast NPW SEA 252 Nylon 11 Biocomposite, securely packed for safe transport. |
| Shipping | NaturePlast NPW SEA 252 Nylon 11 Biocomposite ships as dry, sealed pellets in standard packaging to protect against moisture uptake. Store in a cool, dry area away from direct sunlight. Not classified as dangerous goods, so it transports via standard freight, avoiding excessive heat and humidity during transit. |
| Storage | Store in a cool, dry, well-ventilated area, ideally below 25°C, in its original sealed packaging. Protect from direct sunlight, moisture, and humidity, as the biocomposite is hygroscopic. Avoid exposure to extreme heat, sparks, or incompatible chemicals. Keep containers tightly closed to prevent contamination. Maintain good housekeeping and use within recommended shelf life for optimal performance. |
| Shelf Life | Store in sealed, dry, cool conditions. Shelf life is 2 years from date of manufacture when unopened. |
In multilayer nylon 11 vapour management and pneumatic brake tubing, NPW SEA 252 is let down into virgin polyamide 11 at 25 wt% to 35 wt% for small-diameter vapour return and purge lines; for spiral-cut truck air brake jackets the grade is used at 15 wt% to 25 wt% in the outer core layer to retain the burst strength contribution of the virgin PA11 inner layer. Compliance is governed by ISO 7628-1:2010 for thermoplastic tubing in road vehicles and SAE J844 for non-metallic air brake tubing; formulations are additionally screened under REACH 1907/2006 and RoHS 2011/65/EU at compound level. Extrusion is performed on a single-screw tubing extruder with L/D 30:1, a barrier screw and three-zone vacuum calibration; pellets are pre-dried at 80°C for 4 h to below 0.08% moisture before melt processing. Melt zones are held at 210°C to 220°C, a narrow band because the seaweed-derived lignocellulosic filler fraction starts to brown at higher barrel settings, generating black specks and a measurable drop in elongation at break. Production-scale failure modes recorded on tubing lines include internal melt fracture at line speeds above 45 m/min when the outer layer viscosity falls below the inner layer viscosity, and pinhole formation in vacuum sizing when the compound moisture exceeds 0.12%. Terminal parts include compressed air brake lines for heavy goods vehicles, fuel vapour return tubes in gasoline direct injection evaporative systems, purge lines in hybrid fuel tanks, and protective jacketing for hydrogen fuel cell drain lines where low-temperature impact is required.
For reusable medical device housings, the relevant biological evaluation is ISO 10993-5:2009 for in vitro cytotoxicity and USP <88> Class VI for systemic injection, intracutaneous and implantation reactivity; if the component contacts only intact skin for transient periods, the minimum requirement is typically ISO 10993-1:2018 surface-contacting classification. NPW SEA 252 is introduced at 10 wt% to 20 wt% into a virgin polyamide 11 base for injection-moulded handles, instrument bodies and detachable clips; higher loadings above 20 wt% increase surface roughness and reduce post-sterilisation impact retention because moisture absorbed by the biofiller expands during autoclaving. Moulding uses an injection-moulding machine with a 25:1 general-purpose screw, melt temperature 200°C to 215°C, mould temperature 50°C to 70°C, and pre-drying to 0.06% moisture; hold pressure is maintained until gate freeze to avoid sink marks in thick clip bosses. Terminal products are dental scaler handles, examination light housings, surgical tray retaining clips and reusable instrument grips. Validation data for this specific NPW SEA 252 configuration under repeated autoclave cycles are not published; therefore batch release should include ISO 527-2:2012 tensile retention after 25 kGy gamma and 134°C steam cycles before production acceptance.
Injection moulding of NPW SEA 252 into eyewear front rims and temple arms typically uses a let-down of 8 wt% to 12 wt% in a polyamide 11/12 alloy to balance flexural recovery and hinge torque retention. The governing frame standard is ISO 12870:2016, with dimensional stability and nickel-free hinge assemblies also screened under REACH 1907/2006 and RoHS 2011/65/EU. The compound is pre-dried at 80°C for 4 h to 0.08% moisture and injected at 190°C to 210°C barrel temperature into polished steel moulds at 40°C to 60°C; biofiller agglomerates larger than 60 µm cause visible surface specks and must be removed by 100 µm melt filtration before the nozzle. Terminal parts are optical frames, sunglass fronts, children’s eyewear temple arms and snap-on optical lens covers. The main production defect observed on high-gloss moulds is gate blush when injection speed exceeds 45 mm/s, requiring reduced velocity profile rather than higher melt temperature because the natural filler imposes a 220°C ceiling before yellowing.
| Downstream sector | Addition ratio in PA11 | Melt ceiling | Pre-drying moisture limit | Primary standard set |
|---|---|---|---|---|
| Automotive vapour and pneumatic tubing | 15–35 wt% | 220°C | 0.08% | ISO 7628-1:2010; SAE J844 |
| Medical device housings | 10–20 wt% | 215°C | 0.06% | ISO 10993-5:2009; USP <88> |
| Ophthalmic frames | 8–12 wt% | 210°C | 0.08% | ISO 12870:2016 |
| Industrial flexible conduit | 10–20 wt% | 220°C | 0.10% | IEC 61386-23:2018; UL 94 HB |
| Sports and recreation load parts | 20–30 wt% | 210°C | 0.06% | ASTM D638-14; ISO 179-1:2020 |
| Electronic snap-fit clips | 15–25 wt% | 215°C | 0.10% | IEC 62368-1:2018; RoHS 2011/65/EU |
When a corrugated loom extrusion line changes from fossil PA12 to NPW SEA 252, the material is generally added at 10 wt% to 20 wt% into PA11 carrier resin to maintain flexibility while increasing the bio-based content of the conduit wall without changing corrugator tooling. The relevant compliance set includes RoHS 2011/65/EU, UL 94 HB for flammability of the finished conduit, and IEC 61386-23:2018 for flexible conduit systems where installed in building or rail environments. Drying before extrusion is required at 80°C for 4 h to 0.10% moisture; single-screw corrugator lines with L/D 28:1 and vacuum calibration process the compound at 200°C to 220°C, with corrugator speed adjusted by 5% to 8% slower than virgin PA12 due to higher melt elasticity. Terminal products include railway cable protection conduits, robotic dress-pack covers, pneumatic control bundles, and split loom for off-highway equipment. The primary production bottleneck is corrugation collapse when the parison temperature exceeds 220°C; high-speed corrugation data for this specific grade remains limited, so line trials require stabilised parison weight verification every 30 min.
Thermal degradation kinetics become the controlling factor when NPW SEA 252 is injection moulded into sports and recreation load-bearing components at addition ratios of 20 wt% to 30 wt% in PA11. The compliance baseline for mechanical validation is ASTM D638-14 for tensile properties and ISO 179-1:2020 for Charpy notched impact, with end-use requirements often referencing ISO 527-2:2012 and ISO 75-2:2013 HDT at 0.45 MPa. Pre-drying is set at 80°C for 5 h to 0.06% moisture; barrel profile is 195°C to 210°C with nozzle at 205°C, and back pressure limited to 20 bar to 30 bar to avoid excessive shear heating in the biofiller-rich melt. Total residence time must not exceed 6 min; above this threshold the natural filler undergoes progressive thermomechanical chain scission, producing caramel-like specks, reducing Charpy notched impact by more than 15%, and increasing melt volume-flow rate variability beyond the process capability window defined by ISO 1133-1:2022. Terminal products include trekking pole clamps, fishing reel side plates, archery riser inserts, and cycling saddle shells. Production-scale failures on 120 t clamp force machines are concentrated in short-shot conditions when the melt cushion falls below 3 mm, because the narrow temperature window leaves insufficient superheat for flow into thin ribs.
Dry-moulded electronic snap-fit clips and internal brackets use NPW SEA 252 at 15 wt% to 25 wt% in PA11 to reduce water uptake while maintaining post-mould spring-back. The relevant compliance set is RoHS 2011/65/EU, IEC 62368-1:2018 for audio/video and information technology equipment, and ISO 294-1:2017 for injection moulding test specimen preparation. The material is dried to 0.06% moisture and moulded at 200°C to 215°C with injection speed below 55 mm/s and mould temperature 60°C to 80°C to prevent premature solidification at thin snap finger tips. Terminal parts are wearable electronic frames, battery bracket clips, laptop hinge covers, and sensor housings. Retention force stability depends on moisture content at moulding; above 0.10% moisture the moulded clip shows surface splay and snap-fit retention drops by 10% to 15% after 48 h conditioning at 23°C and 50% RH. Published data on long-term snap-fit creep in this natural-filled system is limited, so design validation should include ISO 527-2:2012 tensile creep measurements at 23°C and 50% RH.
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| Parameter | Standard | Use in NPW SEA 252 evaluation |
|---|---|---|
| Density | ISO 1183-1:2019 | Detects filler loading and affects weight-reduction comparisons |
| Tensile modulus and strength | ISO 527-1/-2:2012 | Replacement calculation for stiff structural clips and housings |
| Flexural modulus | ISO 178:2019 | Assesses short-beam bending resistance under mounting loads |
| Notched Charpy impact | ISO 179-1:2023 | Low-temperature and ambient ductility in snap-fit features |
| Heat deflection temperature | ISO 75-2:2013 | Upper service temperature for painted or coated parts |
| Water absorption | ISO 62:2008 | Dimensional stability and processing moisture control |
| Bio-based carbon | ASTM D6866-24 / ISO 16620-2:2019 | Sustainability and feedstock verification |
