| HS Code | 519875 |
| Product Name | Amco Plastic Materials HDPE 004 GRANULAR |
| Manufacturer | Amco Plastic Materials |
| Material Type | High Density Polyethylene (HDPE) |
| Form | Granular |
| Color | Natural |
| Density | 0.960 g/cm³ |
| Melt Flow Rate | 0.40 g/10 min |
| Tensile Strength At Yield | 25.0 MPa |
| Tensile Strength At Break | 30.0 MPa |
| Elongation At Break | 600% |
| Flexural Modulus | 1.20 GPa |
| Notched Izod Impact Strength | 0.500 J/cm |
| Hardness Shore D | 65 |
| Vicat Softening Point | 125 °C |
| Heat Deflection Temperature | 75 °C |
| Water Absorption | 0.010% |
| Environmental Stress Crack Resistance | >1000 hr |
As an accredited Amco Plastic Materials HDPE 004 GRANULAR factory, we enforce strict quality protocols—every batch undergoes rigorous testing to ensure consistent efficacy and safety standards.
| Packing | Amco Plastic Materials HDPE 004 GRANULAR is packaged in 25 kg moisture-resistant bags, stacked on pallets for secure industrial transport. |
| Container Loading (20′ FCL) | 20′ FCL container loaded with Amco Plastic Materials HDPE 004 Granular in 25 kg bags, palletized, shrink-wrapped, and secured for shipment. |
| Shipping | Amco Plastic Materials HDPE 004 GRANULAR is a non-hazardous polyethylene resin shipped in 25-kg bags, supersacks, or bulk containers. Keep dry, clean, and away from heat or ignition. Avoid dust inhalation. Handle with standard industrial hygiene. Not DOT/IMDG/IATA regulated; no UN number, hazard class, or packing group required. |
| Storage | Store Amco Plastic Materials HDPE 004 GRANULAR in a cool, dry, well-ventilated area away from direct sunlight, heat, sparks, flames, and strong oxidizers. Keep original containers closed and labeled. Avoid dust generation and static buildup; use grounding where required. Prevent moisture and contamination. Maintain good housekeeping to reduce slipping and fire risk. For industrial use only. Follow supplier SDS. |
| Shelf Life | Stable with indefinite shelf life when stored cool, dry, and UV-protected; consult supplier for specific Amco HDPE 004 GRANULAR guidance. |
In continuous extrusion blow moulding of UN-certified tight-head containers, Amco Plastic Materials HDPE 004 granular is charged as the sole virgin base resin at 100 parts by weight. Formulation entry for a black UV-stabilised jerrycan typically consists of 4–6 phr carbon black concentrate, 0.10–0.50 phr UV stabiliser masterbatch, and 0.05–0.20 phr antioxidant/acid scavenger masterbatch; colour-matched non-black containers use 2–4 phr of a 50:50 pigment concentrate in HDPE. Clean in-house regrind is introduced at 10–20 phr after size reduction through a granulator with a 10 mm screen and fines extraction. Grade-specific published data for HDPE 004 granular under ADR/IMDG performance testing is limited; the processing window below reflects general HDPE blow-moulding grade envelopes rather than product-specific values.
Regulatory compliance for dangerous goods jerrycans follows UN Model Regulations Chapter 6.1 performance testing, ADR 6.1.5, or IMDG 6.1 for drop, leakproofness, and hydraulic internal pressure; where the container is used for food or pharmaceutical intermediates, the finished article must comply with FDA 21 CFR 177.1520 and EU 10/2011 migration limits. Processing on a 24D–30D barrier feed extruder with an accumulator head and parison programmer operates with melt temperature 180–205°C, mould coolant inlet 8–16°C, blow-up ratio 2.2:1–3.0:1, and blow air pressure 0.6–0.8 MPa. A documented failure mode on shuttle machines is parison sagging and top-edge thinning when melt temperature exceeds 210°C; the adjustment is to lower screw speed or modify die gap programming, not to increase barrel temperature. Terminal articles include 20 L, 25 L, 30 L tight-head jerrycans, open-top pails, F-style containers for agricultural chemicals, and 60 L industrial containers.
The structural base resin for corrugated HDPE pipe is HDPE 004 granular, charged at 100 parts by weight; carbon black masterbatch is dosed at 5–6.5 phr to achieve 2.0–3.0% carbon black in the finished pipe, with an antioxidant/processing stabilizer masterbatch at 0.05–0.15 phr and a fluoropolymer process aid at 0.02–0.05 phr to suppress melt fracture in the corrugator block. On a 33:1 L/D single-screw extruder with a spiral mandrel die and vacuum calibrator, melt temperature measured at the adapter is typically 190–220°C; the corrugator line speed is balanced against screw speed to maintain a wall thickness of 0.8–2.5 mm depending on diameter. A recurring bottleneck is out-of-roundness caused by loss of vacuum in the forming blocks; the correction is to reduce line speed and increase cooling water circulation at 15–20°C before changing die lip geometry.
Compliance for European drainage pipes is specified under EN 13476-2 for structured-wall pipes and ISO 8772 for high-density polyethylene piping systems for drainage and sewerage; ring stiffness is tested under ISO 9969 at 23±2°C. North American culvert and drainage specifications reference ASTM F2306, AASHTO M294, and ASTM D3350 cell class for HDPE materials. Finished articles include 100 mm to 800 mm corrugated drainage pipe, retention/detention system components, and cable protection conduits.
| Standard | Test property | Acceptance value |
|---|---|---|
| ISO 9969 | Ring stiffness SN4 | ≥ 4 kN/m² at 23±2°C |
| ISO 9969 | Ring stiffness SN8 | ≥ 8 kN/m² at 23±2°C |
| ASTM F2306 | Pipe stiffness at 5% deflection | manufacturer-specified minimum for the specific corrugated profile |
Flat die extrusion/calendering of HDPE geomembrane uses HDPE 004 granular at 100 parts by weight. Carbon black masterbatch is added at 5–6 phr to maintain 2.0–3.0% carbon black, antioxidant package at 0.25–0.50 phr, and process aid at 0.02–0.05 phr. Scrap-edge trim is reintroduced at 10–15 phr only after shredding and metal detection; higher regrind fractions lower the oxidative induction time because the stabiliser package is depleted, which is a documented limitation in ASTM D3895 oven aging. On a 30D–36D single-screw extruder with a flat die of 2,000–3,500 mm width and a three-roll stack, melt temperature is held at 180–230°C depending on throughput; gauge is measured continuously with a beta scanner and controlled by die lip adjustment and roll gap. Textured surfaces are produced by embossing rolls or blown film texturing; asperity height is checked against GRI-GM13, with published values for 1.5 mm sheet typically 0.25–0.75 mm.
Regulatory and specification compliance for geomembrane liners is anchored to GRI-GM13 for smooth and textured HDPE geomembranes, ASTM D1505 for density, ASTM D6693 for tensile properties, ASTM D1004 for tear resistance, and ASTM D5397 for notched constant tensile load stress-crack resistance. Installation welding is qualified under ASTM D6392 for hot wedge seam strength. Terminal products include 1.0 mm, 1.5 mm and 2.0 mm smooth and textured geomembrane rolls for landfill caps, heap leach pads, pond liners, and secondary containment basins. Published data specific to Amco HDPE 004 granular in single-ply geomembrane configurations is limited; the values above are representative HDPE geomembrane-grade manufacturing envelopes, not product-specific guarantees.
On shuttle and rotary-wheel blow-moulding lines, HDPE 004 granular for pharmaceutical rigid packaging is charged at 100 parts by weight and restricted to additive formulations with low extractables. A typical additive package consists of a phenolic/phosphite antioxidant system at 0.02–0.10 phr, an acid scavenger at 0.01–0.03 phr, and 5–15 phr clean in-house regrind; the regrind fraction for pharmacopoeial products must be controlled by lot and validated for extractables under USP <661.1> and Ph. Eur. 3.1.3/3.1.4. Shuttle and rotary-wheel machines are typically fitted with a 20D–25D screw, gravimetric dosing, and a parison programmer; melt temperature is 180–195°C, mould coolant inlet 8–12°C, and blow air pressure 0.5–0.7 MPa. Wall distribution is verified by in-line weighing and infrared transmission or ultrasonic gauge; a frequent defect is excessive handle pinch flash and inconsistent wall thickness near the base, corrected by adjusting pinch-off land temperature and mould venting rather than raising melt temperature.
Filled containers are tested for drop impact, side-load creep, and stress-crack resistance; for OTC tablet bottles, the resin and finished closure must meet FDA 21 CFR 177.1520 and EU 10/2011 when contact with oral solid dosage forms is declared. USP <661.1> and Ph. Eur. 3.1.3/3.1.4 define the final-container chemical safety limits. Terminal articles include 15 ml, 30 ml, 60 ml, 100 ml and 250 ml HDPE round and square vials, OTC tablet bottles with continuous thread closures, veterinary bolus containers, and desiccant bottles for diagnostic strips. Published data specific to HDPE 004 granular in high-volume pharmaceutical lines is limited; validation on the actual shuttle or wheel machine is required because extractables and organoleptic performance are batch-dependent.
Extrusion of HDPE monofilament from HDPE 004 granular requires a base resin charge of 100 parts by weight, with UV stabilizer masterbatch at 0.20–0.80 phr, colorant masterbatch at 2–5 phr, and processing aid at 0.05–0.20 phr. Draw ratio on a multi-stand godet line is set between 5:1 and 9:1, with the first water bath held at 30–50°C and a hot-air or heated-roll stretching stage at 90–120°C; published HDPE monofilament tenacity values typically reach 3.0–5.5 cN/dtex at a diameter of 0.15–0.50 mm. Melt temperature at the die exit is 190–210°C, and a melt pump is used to reduce pressure pulsation that otherwise creates draw resonance and diameter variation. A documented production failure is filament fibrillation when the draw ratio exceeds the melt strength limit; the correction is to lower draw ratio or increase the first bath temperature, not to increase extruder output.
Compliance for industrial monofilaments references ASTM D3218 for polyolefin monofilament, ISO 2307 for rope breaking load, and EN ISO 1346 for synthetic fibre rope specifications; UV-stabilized grades used in agricultural netting are evaluated by accelerated weathering under ASTM G154. Terminal products include braided rope, leno mesh bag netting, geotextile scrim, shade cloth, and knitted vermin protection netting. Amco HDPE 004 granular may not have published draw resonance limits for this configuration; the values above reflect HDPE extrusion-grade drawing envelopes, not grade-specific guarantees.
When reusable industrial dunnage is thermoformed from extruded HDPE sheet, HDPE 004 granular is combined at 100 parts by weight with 20–35 phr clean plant regrind and 2–6 phr colorant, carbon black, or antistatic masterbatch depending on end-use. Antioxidant top-up is maintained at 0.05–0.10 phr to offset thermal degradation during sheet extrusion and repeated thermoforming heat cycles; excessive regrind above 35 phr without additive correction is a known cause of microgel formation in the sheet, which produces surface defects in deep-draw trays. Sheet extrusion is run on a 30D single-screw extruder with a coat-hanger flat die and a three-roll polishing stack at 70–90°C roll temperature; melt temperature at the die is 190–220°C. Thermoforming uses plug-assisted pressure forming at 0.4–0.6 MPa forming pressure and 140–160°C sheet surface temperature, with trim removal by matched-metal or steel-rule tooling.
Compliance for industrial dunnage is defined by ASTM D638 or ISO 527-2 tensile testing, ISO 6603-2 puncture impact testing for impact-resistant trays, and FDA 21 CFR 177.1520 with EU 10/2011 where reusable trays contact food during transport. Terminal articles include pallet top decks, freezer spacers, tote liners, automotive reusable trays, concrete curing covers, and corrosion-sensitive component trays. Published grade-specific processing data for HDPE 004 granular in thermoforming is limited; the values above are typical HDPE sheet extrusion and thermoforming ranges reported in equipment technical bulletins.
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Amco Plastic Materials HDPE 004 GRANULAR is a high-density polyethylene resin supplied in granular form for extrusion-class conversion processes. The designation 004 is consistent with a melt flow rate of approximately 0.4 g/10 min when measured at 190 °C under 2.16 kg load in accordance with ISO 1133-1:2022. The granular morphology is not incidental; it alters bulk density, feeding behaviour in smooth-bore and grooved feed throats, and the temperature homogeneity achievable in single-screw extruders. No pre-drying is required for sealed product stored at 20–25 °C and relative humidity below 60%. Condensation formed when cold granulate is transferred into a warm processing room is a documented cause of surface splay and blow-moulded part defects. The grade is intended for applications requiring high melt strength, high environmental stress crack resistance, and controlled die swell rather than for high-speed thin-wall injection moulding.
Table 1 presents representative lot averages for high-density polyethylene resins in the 0.35–0.45 g/10 min melt flow rate class. The values are provided for preliminary process design and comparative material screening only; they do not replace the supplier certificate of analysis. Where published manufacturer-specific data for Amco Plastic Materials HDPE 004 GRANULAR is limited, the ranges should be read as typical for granular high-molecular-weight HDPE of the same nominal melt flow designation.
| Property | Test method | Typical range |
|---|---|---|
| Density, 23 °C | ISO 1183-1 | 0.941–0.946 g/cm³ |
| Melt flow rate, 190 °C / 2.16 kg | ISO 1133-1:2022 | 0.35–0.45 g/10 min |
| Melt flow rate, 190 °C / 5.0 kg | ISO 1133-1:2022 | 1.2–1.5 g/10 min |
| Melt flow rate ratio, 21.6 kg / 2.16 kg | ISO 1133-1:2022 | 18–22 |
| Tensile yield stress | ISO 527-2:2012 | 22–25 MPa |
| Elongation at yield | ISO 527-2:2012 | 8–10% |
| Tensile elongation at break | ISO 527-2:2012 | 600–800% |
| Flexural modulus | ISO 178:2019 | 850–950 MPa |
| Charpy notched impact, 23 °C | ISO 179-1/1eA | 25–35 kJ/m² |
| Charpy notched impact, −30 °C | ISO 179-1/1eA | 6–9 kJ/m² |
| Vicat softening temperature, A50 | ISO 306:2022 | 122–126 °C |
| Shore D hardness | ISO 868:2003 | 60–64 |
| ESCR, 10% Igepal CO-630, 50 °C | ASTM D1693-15b Condition B | F50 > 100 h |
| Bulk density | ISO 60:1977 | 0.54–0.58 g/cm³ |
| Moisture content | ISO 15512:2019 | < 0.05% |
The melt flow rate ratio of 18–22 indicates a broad molecular weight distribution. This breadth is significant in blow moulding because it permits shear thinning during extrusion while retaining parison melt strength during hang time. A lower ratio can increase parison sag on large moulds; a higher ratio may require more intensive screw mixing to avoid melt temperature heterogeneity. For dry blending or regrind operations, bulk density below 0.52 g/cm³ should trigger gravimetric feeder recalibration because granular feed factor changes with particle-size distribution.
Oxidative stability at processing temperatures is not captured by a single melt flow measurement. For high-molecular-weight HDPE, oxidation induction time values obtained by ISO 11357-6 at 200 °C are typically above 20 min for stabilized extrusion grades; users should confirm the specific formulation because stabilization packages vary with intended food-contact or industrial service.
In extrusion blow moulding, the useful operating window is bounded by two competing failure modes. Parison sag resistance requires high melt viscosity, while surface quality and die pressure require sufficient shear thinning. For HDPE 004 GRANULAR, barrel temperature settings are typically profiled from 180 °C at the feed zone to 205 °C at the metering zone, with head and die zones controlled between 205 °C and 215 °C. Melt temperature measured at the die exit should remain between 190 °C and 210 °C. Above 215 °C, oxidative chain scission accelerates and environmental stress crack resistance declines. Below 185 °C, die entry pressure rises and shark-skin melt fracture becomes more probable at die exit shear rates above 150 s−1. Accumulator-head machines with clamp force from 500 kN to 1,500 kN are suitable for continuous production of containers from 5 L to 220 L, though published data for this specific configuration is limited.
Die swell for this melt flow class is generally observed between 1.25 and 1.45 at a shear rate of 100 s−1. Consequently, die bushing diameters are undersized by 20–30% relative to the target parison diameter. Practical die gaps range from 1.2 mm to 2.5 mm. Below 1.2 mm, die head pressure can exceed 35 MPa in unvented heads; above 2.5 mm, wall-thickness control becomes less responsive for narrow neck finishes. Screw design should use a length-to-diameter ratio of 24:1 to 30:1, a compression ratio of 2.5:1 to 3.5:1, and a barrier or Maddock mixing section. Production-scale experience indicates that feed throat instability is more likely when granulate bulk density varies by more than 0.03 g/cm³ between silos or day bins.
Parison programming is used on large containers to shift wall thickness toward the bottom pinch-off and shoulder regions. On machines equipped with 100-point parison controllers, wall thickness settings commonly fall between 1.5 mm and 5.0 mm for 20 L to 200 L containers. Shot weight should be maintained within ±1.5% of target; shot-to-shot variation above ±2% typically indicates feed bridging, worn accumulator seals, or inconsistent parison programming. At the clamp end, mould temperature is controlled at 10 °C to 25 °C for containers; higher mould temperatures reduce cooling water consumption but extend cycle time and lower sidewall impact resistance if the part is demoulded above 70 °C.
The antioxidant and acid-scavenger package in HDPE 004 GRANULAR is compounded at the polymerisation finishing stage; therefore, dry blending of additional stabilisers is generally unnecessary for standard blow moulding. If colour masterbatch is added at 2–5%, the carrier resin should have a melt flow rate within 0.4–0.8 g/10 min to avoid localised shear heating and unmelted agglomerates at screen packs sized from 60 to 120 mesh. Screen-pack pressure drop should be recorded at start-up; an increase beyond 0.7 MPa above baseline indicates gel accumulation from degraded resin or crosslinked masterbatch.
Compared with LDPE and LLDPE film resins at similar melt flow rate, HDPE 004 GRANULAR has higher density, higher flexural modulus, and lower water vapour transmission rate. Its elongation at break and tear resistance are lower, and heat-seal initiation temperature is approximately 15–20 °C higher. These differences shift the application boundary away from flexible film and into rigid packaging, sheet, pipe, and blow-moulded articles. In coextruded structures, HDPE 004 can serve as the structural barrier layer where moisture resistance and stiffness are required, while LDPE or LLDPE layers provide seal strength and dart impact resistance.
Compared with pipe-grade high-density polyethylene classified as PE 100 under ISO 12162, HDPE 004 GRANULAR does not automatically carry the same hydrostatic design basis. Users considering pressure piping must obtain the manufacturer’s long-term hydrostatic strength tabulation for the specific compound; published data for this specific configuration is limited. For non-pressure storage tanks and free-standing containers, environmental stress crack resistance and drop impact at low temperature are generally more appropriate selection metrics than hydrostatic design stress.
Substitution of granular HDPE 004 for an injection-moulding HDPE with melt flow rate of 8–20 g/10 min is not a direct material swap. The low melt flow rate raises filling pressure, reduces flow length, and increases the probability of short shots in cold-runner tools when flow path-to-wall-thickness ratio exceeds 150:1. Conversely, HDPE 004 provides higher notched impact strength at −30 °C and higher environmental stress crack resistance than typical high-flow injection grades. It also widens the blow moulding processing window because parison melt strength is retained over longer hang times. For caps, closures, and thin-walled packaging with wall stock below 1.0 mm, high-flow grades remain preferred. For structural containers, industrial drums, and chemical reservoirs, the low-MFR granular product is selected because environmental stress cracking is a more significant service risk than cycle time.
Resin-level documentation is not equivalent to finished-article compliance. For a polyethylene homopolymer within the density range shown in Table 1, FDA 21 CFR 177.1520 may apply subject to extraction testing on the finished article under the intended conditions of use. Under Regulation (EU) No. 10/2011, overall migration testing is required on the final article; the resin itself cannot be assigned a final overall migration value. Table 2 summarises the typical control status for granular high-density polyethylene supplied in the European Union and North America. Each item must be verified against the lot-specific certificate of analysis and safety data sheet.
| Standard or regulation | Test method or clause | Typical control status |
|---|---|---|
| REACH Regulation (EC) No. 1907/2006 | Article 33 | SVHC < 0.1% w/w in supplied granulate |
| RoHS Directive 2011/65/EU | IEC 62321-5:2013 | Pb < 1000 mg/kg; Cd < 100 mg/kg |
| FDA 21 CFR 177.1520 | Olefin polymers | Compliant subject to finished-article extraction |
| EU Regulation (EU) No. 10/2011 | Annex I, Article 12 overall migration | OML < 10 mg/dm² on final article |
| USP <661.1> | Plastics of construction | Test on formed articles; resin alone not classified |
Storage outside 5–30 °C can promote condensation or oxidative ageing if silo headspace oxygen is not displaced. The granulate should not be combined with amine-based additives that are not specifically approved for polyethylene, because such additives can cause surface discoloration and generate odor-active by-products. Regrind addition up to 20% is commonly used in blow moulding; higher levels reduce parison melt strength and shift the molecular weight distribution toward lower MFR stability. Processing trials should include differential scanning calorimetry of incoming lots when crystallinity falls below 60%, because this may indicate contamination by lower-density polyethylene or polypropylene.
