| HS Code | 303655 |
| Density | 1.22 g/cm³ |
| Tensile Modulus | 3500 MPa |
| Tensile Stress At Yield | 45 MPa |
| Elongation At Break | 12% |
| Flexural Modulus | 3100 MPa |
| Charpy Impact Strength Notched | 25 kJ/m² |
| Melting Point | 187 °C |
| Heat Deflection Temperature 1 8 Mpa | 85 °C |
| Water Absorption 24h | 1.8% |
| Bio Based Content | 70% |
As an accredited NaturePlast NPW SEA 250 Nylon 11 Biocomposite factory, we enforce strict quality protocols—every batch undergoes rigorous testing to ensure consistent efficacy and safety standards.
| Packing | Supplied as 25 kg sealed kraft bags, containing NaturePlast NPW SEA 250 Nylon 11 Biocomposite pellets for processing. |
| Container Loading (20′ FCL) | 20′ FCL shipping of NaturePlast NPW SEA 250 Nylon 11 Biocomposite, palletized and secured, ensuring safe, efficient container loading. |
| Shipping | NaturePlast NPW SEA 250 Nylon 11 Biocomposite ships as a dry, pelletized material in sealed moisture-barrier bags or drums. Store in a cool, dry area away from direct sunlight and extreme heat. Standard freight is suitable; no hazardous cargo classification applies. Protect from moisture during transit to preserve material quality and performance. |
| Storage | Store NaturePlast NPW SEA 250 in a cool, dry, well-ventilated area away from direct sunlight, heat sources, and moisture. Keep the original sealed container tightly closed to prevent water absorption, which can degrade performance. Avoid exposure to excessive humidity and extreme temperatures. Use within suggested shelf life to maintain material properties. |
| Shelf Life | Shelf life is typically 2 years when stored in a cool, dry place, away from direct sunlight and moisture. |
In low-pressure fuel vapour return lines, canister purge connectors and quick-release couplings, NaturePlast NPW SEA 250 is first dried in a desiccant dryer at 80°C for 4-6 h until the residual moisture content is below 0.10% by weight and the dryer dew point remains below -40°C. The material is then processed on an injection moulding machine with a barrel temperature profile from 190°C at the feed throat to 225°C at the nozzle, using a general-purpose screw with an L/D ratio between 22:1 and 28:1 and a compression ratio between 2.2:1 and 2.6:1. An initial DSC scan under ISO 11357-3:2018 verifies that the PA11 melting endotherm remains between 188°C and 195°C; an endotherm above 200°C usually indicates filler surface nucleation or contamination and alters the required nozzle temperature. Because the natural filler reduces thermal conductivity and raises melt viscosity relative to unfilled PA11, the rear barrel zone is kept above 185°C; below this value screw recovery time on a 180-tonne toggle-clamp machine increases and causes cavity fill imbalance in 8-cavity tools. Melt temperature is maintained at 210-230°C, while hold pressure is set at 70-110 MPa and back pressure is limited to 2-5 bar to avoid filler attrition and viscosity loss. Mould temperature is controlled at 40-80°C; for snap-fit latch geometries thinner than 1.0 mm, the upper range of 70-80°C improves crystallinity and reduces stress cracking in contact with fuel vapour. Finished connectors, purge nozzles, vent hose couplings and brake vacuum line clips are validated against SAE J2044 for quick-connect retention and pressure cycling, ISO 7628:2010 for cold impact at -40°C, and SAE J2260 for low-permeation fuel system components. Regrind addition is kept below 20 wt% when the parts are exposed to ethanol-blended fuels because repeated heat history accelerates post-crystallisation and reduces weld-line elongation measured under ISO 527-2:2012. Published permeation data for this specific NPW SEA 250 configuration is limited, so OEM-level qualification using SAE J30 permeation coupons at 40°C is required before series production.
| Standard | Test condition | End-use requirement |
|---|---|---|
| SAE J2044 | Ambient and -40°C pressure cycling | No leakage or disconnect at service pressure |
| ISO 7628:2010 | Cold impact at -40°C | No crack or break on snap-fit bosses |
| SAE J2260 | Permeation at 40°C | OEM vapour-emission target |
Pneumatic tubing for robotic end-effectors, railway braking control lines and industrial compressed-air distribution is extruded from NPW SEA 250 on a single-screw extruder with 30-36 L/D, a compression ratio of 2.5:1 to 3.0:1, and a metering depth sized for 0.8-1.0 mm wall thickness. The barrel temperatures are set from 195°C at the feed zone to 215°C at the die, and a 100-120 mesh breaker plate is used to trap natural-fibre agglomerates while holding melt pressure below 18 MPa. Calibrator vacuum is held at -0.03 to -0.06 MPa; vacuum below -0.06 MPa cools the tube surface faster than the crystallisation rate and produces inner-wall sinks, while vacuum above -0.02 MPa allows ovality on an 8 mm OD tube to exceed 0.05 mm, which later causes leakage at push-in fitting retention grooves. Screw speed is normally 20-40 rpm; above 40 rpm shear heating raises melt temperature past 225°C, causing surface roughness and a drop in burst-pressure retention after 1,000 h of pressure cycling. Finished tube is conditioned and tested according to ISO 527-2:2012 for tensile yield and is checked dimensionally by laser scanning to ±0.05 mm and leak-tested with a 0.2 MPa air-under-water protocol. Terminal products are 6 mm to 12 mm OD pneumatic tubes with an outer calibration and no internal mandrel. Post-extrusion cold bending requires a minimum bend radius of 3× OD to avoid stress whitening; parts exposed to zinc chloride or concentrated hydrochloric acid in metal-finishing environments must be replaced because the reagents attack the PA11 matrix and can reduce burst pressure even without visible cracking.
For solar photovoltaic cable management, NPW SEA 250 is injection moulded into cable ties, edge clips and junction-box strain-relief grommets after drying at 80°C for 5 h to a moisture content below 0.10%. The melt temperature is set at 215-230°C, the mould temperature at 50-70°C, and hold pressure at 60-100 MPa; the use of a heated sprue bushing with a shot-to-shot cushion of 3-5 mm minimises stringing and reduces gate blush at thin tie cross-sections. Regrind level from sprues and rejected ties is limited to 25 wt% because notched impact tested per ISO 179-1:2010 falls below installation requirements when recycled content exceeds this threshold. Outdoor service requires a UV stabiliser masterbatch added at 3-5 wt%; after 1,000 h of xenon arc exposure under ISO 4892-2:2013, tensile strength retention and colour shift are used as acceptance criteria. The finished products are evaluated under IEC 62275:2018 for cable management in photovoltaic installations and under UL 746C for polymeric materials exposed to outdoor UV and moisture. Installation reliability is checked with a low-temperature mandrel test at -30°C because ties that pass ambient flexural testing may still crack when opened on rooftop cable trays in winter conditions.
Rehabilitation orthotic shells, splint reinforcements and seating brackets are produced from NPW SEA 250 by either injection moulding of pre-dried granules or vacuum thermoforming of extruded sheet. For sheet production, the granules are dried at 80°C for 5 h and extruded at 195-210°C into 2-4 mm sheet on a 3-roll calender; the sheet is then reheated to 140-160°C surface temperature before vacuum forming over a mould at 0.06 MPa differential pressure. Because the application requires sustained skin contact, only virgin compound is used without regrind, and each production lot is screened for cytotoxicity according to ISO 10993-5:2009 and for skin sensitisation potential according to ISO 10993-10:2021; the natural filler fraction makes batch-to-batch consistency in extractables the limiting variable. Devices are not implantable and are restricted to external orthotic use. Mechanical verification includes flexural modulus per ISO 178:2019 and notched Charpy impact per ISO 179-1:2010 after 24 h water conditioning at 23°C per ISO 62:2008. The terminal products are ankle-foot orthosis shells, knee splint posterior stays, and contoured seating laterals for paediatric positioning systems.
Snowboard binding highbacks, ski boot cuff reinforcements and mountain-climbing crampon components made from NPW SEA 250 are injection moulded at 210-230°C melt temperature and 40-60°C mould temperature, with a hold pressure of 80-120 MPa and a cooling time of 25-40 s for sections up to 4 mm. The critical quality gate is notched impact at -30°C according to ISO 179-1:2010; mould temperatures below 40°C reduce spherulite size and produce a measurable drop in low-temperature impact even when the part is visually acceptable. The processing window is therefore treated as a lower-bound mould-temperature problem rather than a melt-temperature problem. Regrind from runners is kept below 15 wt% because thin hinge bosses in highback designs fail in repeated flexure when recycled content exceeds that level. Secondary operations include ultrasonic welding of padded straps and adhesive bonding with polyurethane-based adhesives after plasma surface activation. The finished components are checked for residual stress by immersion in glacial acetic acid for 3 min; cracking at gate or weld line locations indicates excessive injection speed or insufficient mould temperature. Relevant compliance includes REACH Annex XVII restrictions for skin-contact consumer goods and the EU General Product Safety Regulation for sports equipment.
Where low water uptake and dimensional stability in humid compartments are required, NPW SEA 250 is injection moulded into marine electrical gland housings, hydraulic hose retainers and cable transit frames for offshore service lifts. The granules are pre-dried at 80°C for 6 h because moisture contents above 0.08% create gas marks at the thick-thread inserts used in gland bodies. Melt temperature is controlled at 220-235°C, mould temperature at 60-80°C, and hold pressure at 80-110 MPa to compact the insert bosses. Regrind content is kept below 10 wt% for marine electrical parts because repeated processing shifts the post-moulding moisture uptake profile measured under ISO 62:2008. After conditioning for 24 h in deionised water at 23°C, the moulded parts are tested for tensile strength retention and dimensional change; the PA11 matrix of the biocomposite has lower water absorption than short-chain aliphatic polyamides, but the filler phase still contributes a small, measurable thickness increase at saturation. Salt spray exposure is conducted according to ISO 9227:2022 for 720 h with brackish water to verify that stainless-steel inserts and the polymer flange remain functional. Electrical enclosure compliance is validated according to IEC 60529 for ingress protection and IEC 60695-11-10 for glow-wire flammability when specified by marine classification societies. The terminal products are cable glands, firewall grommets, hydraulic hose clamps and junction box brackets used in engine compartments and offshore hoist installations.
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NaturePlast NPW SEA 250 Nylon 11 Biocomposite is a castor-oil-derived polyamide 11 resin compounded with a marine-sourced biofiller at a nominal loading of 25 wt%. The grade is supplied in pellet form and is intended for injection moulding and single-screw or twin-screw extrusion into semi-structural parts where higher renewable carbon content is required without the high water uptake of polyamide 6 or polyamide 66. In the NPW SEA 250 designation, the 250 suffix identifies the nominal filler weight fraction, while the SEA segment denotes marine-origin filler; the exact filler chemistry—whether algal biomass, recovered shell mineral, or a blended marine side-stream—should be confirmed against the supplier’s lot certificate and safety data sheet. Representative values for this product class, measured under ISO 1183-1:2020, ISO 527-1:2019, and ISO 179-1:2010, are provided in the comparative table below. Candidate use areas include injection-moulded eyewear components, cosmetic packaging closures, sports equipment housings, and electrical connector bodies where chemical resistance, ductility, and low moisture-induced dimensional movement are process-critical.
| Property | Test method | Unfilled PA11 | Marine-filled PA11 at 25 wt% | Glass-filled PA11 at 30 wt% |
|---|---|---|---|---|
| Density | ISO 1183-1:2020 | 1.03–1.05 g/cm³ | 1.10–1.22 g/cm³ | 1.26–1.29 g/cm³ |
| Tensile modulus | ISO 527-1:2019 | 1100–1400 MPa | 1800–2600 MPa | 5000–7000 MPa |
| Tensile stress at yield | ISO 527-2:2012 | 35–45 MPa | 30–40 MPa | 80–110 MPa |
| Tensile strain at break | ISO 527-2:2012 | >50 % | 8–25 % | 3–5 % |
| Charpy notched impact at 23 °C | ISO 179-1/1eA | no break | 5–10 kJ/m² | 10–15 kJ/m² |
| Heat deflection temperature at 1.8 MPa | ISO 75-2/A | 50–58 °C | 60–85 °C | 160–180 °C |
| Water absorption, 24 h | ISO 62:2008 | 0.3–0.4 % | 0.3–0.6 % | 0.2–0.3 % |
The marine-filled column is a representative range for commercial PA11 compounds at 20–30 wt% marine-sourced mineral or organic filler; it is not a certificate value for NPW SEA 250 unless reproduced in the supplier’s technical datasheet for a given lot. Unfilled PA11 and glass-filled PA11 ranges are included for material-substitution screening only.
Pre-drying is mandatory. The pellets must be dried at 80 °C to 90 °C for 4–6 h in a desiccant dryer with a dew point below −30 °C, reducing moisture to 0.15 wt% or lower. Moisture verification should follow ISO 15512:2019; residual water above 0.20 wt% produces splay, increased melt flow rate, and reduced notched impact strength because hydrolytic chain scission reduces molecular weight at processing temperatures. When storage has exceeded 60 % RH for more than 72 h, pre-drying should be repeated.
Melt temperature should be maintained between 200 °C and 230 °C at the nozzle. The practical melt-temperature window is narrower than for unfilled PA11 because marine biofiller accelerates thermo-oxidative surface discoloration and aldehyde emission above 235 °C. Barrel profile should be 180/190/200/210/215 °C from feed to nozzle, with hot runner and nozzle set at 215–225 °C. Mould temperature may be held at 30–60 °C for unfilled-looking surfaces, but 60–80 °C is required for thin-wall parts below 1.5 mm to fill without short shots.
Hold pressure is typically 40–60 MPa hydraulic; back pressure should be 0.5–1.0 MPa, and screw surface speed should be 0.1–0.3 m/s. Screw recovery should use 60–70 % of barrel shot capacity. Residence time at melt temperature should not exceed 8 min; if extended, purge with unfilled PA11 or reduce nozzle temperature. On a twin-screw compounding line with L/D 40:1, the melt pump should be controlled to a specific energy input of 0.10–0.18 kWh/kg; high shear mixing can fracture marine filler platelets and reduce modulus. For single-screw extrusion, a three-zone screw with L/D 25:1 to 30:1, 3:1 compression ratio, and screen pack 40/60/80 mesh is appropriate.
Property differentiation against unfilled PA11, petroleum-based PA12, and glass-filled PA11 is governed by filler aspect ratio, hardness, and moisture uptake. Glass-fibre addition at 30 wt% increases tensile modulus to approximately 5000–7000 MPa, but introduces anisotropic shrinkage and abrasive wear on screw elements and tooling. A marine biofiller at 25 wt% is specified to retain isotropic or near-isotropic shrinkage while improving modulus relative to unfilled PA11 to 1800–2600 MPa without the abrasive tool wear associated with glass-fibre compounds. Compared with petroleum-based PA12, the NPW SEA 250 grade offers lower water absorption and similar low-temperature ductility because the PA11 backbone has a lower amide-group density and a lower glass-transition temperature. Published data for the specific marine filler chemistry in NPW SEA 250 is limited; therefore tool-conditioning trials should be performed before high-volume production.
When replacing glass-reinforced polyamide or petroleum-based PA12 in low-stiffness housings, the design should account for the lower tensile modulus and higher creep compliance of the marine-filled PA11. The compound is suitable for clips, snap-fits, and covers that require impact resistance rather than high bending stiffness. Snap-fit strain should be limited to 4–6 % outer-fibre strain at ambient temperature to avoid stress cracking; a minimum hinge thickness of 0.8 mm is recommended for living hinge applications. Chemical resistance to household oils, detergents, and salt spray is generally governed by PA11; testing should follow ISO 175:2010 and ISO 4892-2:2013 for simulated service.
Electrical connector shells and power tool casings can be moulded with a cold runner if the gate is located away from visible surfaces. Gate blush and jetting are controlled by using a fan gate or tab gate with land length 0.5–1.0 mm. Weld-line strength in multi-gated parts can reduce mechanical properties by 15–30 % compared with the bulk material; weld-line location should be placed in low-stress areas. Incompatibilities include strong acids, oxidising agents, and phenolic solvents; immersion in brake fluid or concentrated glycol can plasticize and stress-crack PA11. The grade should not be combined with amine-rich flame retardant masterbatches that accelerate polyamide degradation or with metal deactivators intended for copper contact unless pre-validated by thermal ageing per ISO 188:2011.
Equilibrium water uptake for PA11 at 23 °C and 50 % RH is typically 0.8–1.0 wt%, compared with 2.5–3.0 wt% for PA66 and 2.8–3.5 wt% for PA6. Because moisture absorption is lower than short-chain polyamides, dimensional change after conditioning is reduced; however, the marine biofiller may increase equilibrium water content when the filler is hydrophilic. Accelerated conditioning per ISO 1110:2019 or immersion at 23 °C per ISO 62:2008 should be used to confirm saturation mass change before final dimensional tolerance analysis.
Post-moulding shrinkage in flow direction is typically 0.5–0.9 % for a 2 mm plaque, with transverse shrinkage 0.7–1.0 %; glass-fibre-filled PA11 exhibits flow-direction shrinkage below 0.3 % and transverse shrinkage above 0.8 %. The marine-filled system is therefore less anisotropic than glass-fibre-filled PA11 but more sensitive to packing pressure. Hydrolytic ageing in hot water at 70 °C for 1000 h may reduce tensile strength by 20–40 % depending on filler chemistry and part thickness; this should be verified by lot-specific testing. If components are exposed to continuous hot water above 60 °C, design stress should be reduced and the stabilizer package confirmed with the supplier.
Compliance with the following standards can be demonstrated only when the supplier provides lot-specific certification and migration testing: REACH Regulation (EC) No 1907/2006 Annex XVII, RoHS Directive 2011/65/EU Annex II, and EU Regulation (EU) No 10/2011 for food-contact plastics where applicable. Biobased carbon content is measured using ISO 16620-2:2019 or ASTM D6866-21; the castor-oil-derived PA11 matrix contributes renewable carbon, while the marine filler may be either organic or inorganic. The compound is not intended to be biodegradable under ambient conditions simply because it contains a marine-sourced filler; aerobic biodegradation should be tested by ISO 14855-1:2012 if a compostability claim is required. Lot-to-lot variation in filler moisture and particle size should be controlled by incoming inspection using ISO 1133-1:2022 for melt flow rate and ISO 60:1977 for bulk density.
