| HS Code | 887623 |
| Polymer Type | High-density polyethylene (HDPE) copolymer |
| Density | 0.955 g/cm³ |
| Melt Index 190 C 2 16 Kg | 0.30 g/10 min |
| Tensile Strength At Yield | 26 MPa |
| Tensile Strength At Break | 30 MPa |
| Elongation At Break | 600% |
| Flexural Modulus | 1100 MPa |
| Notched Izod Impact At 23 C | 100 J/m |
| Vicat Softening Temperature | 127°C |
| Environmental Stress Crack Resistance Escr | >1000 h |
| Hardness Shore D | 65 |
| Melting Temperature | 130°C |
| Thermal Conductivity | 0.45 W/m·K |
| Brittleness Temperature | < -70°C |
As an accredited Braskem HDPE 300 factory, we enforce strict quality protocols—every batch undergoes rigorous testing to ensure consistent efficacy and safety standards.
| Packing | Braskem HDPE 300 is packaged in 25 kg polyethylene-lined bags, palletized and stretch-wrapped, with 55 bags per pallet. |
| Container Loading (20′ FCL) | Container loading for Braskem HDPE 300: 20′ FCL, palletized bags, dry conditions, evenly distributed, secured for ocean transport. |
| Shipping | Braskem HDPE 300 ships as nonhazardous solid polyethylene pellets in 25 kg bags, jumbo bags, or bulk containers. Transport by truck, rail, or sea in dry, clean vehicles. Store cool, dry, away from sunlight and contamination. No special UN classification. Handle carefully to avoid bag damage and spillage. |
| Storage | Store Braskem HDPE 300 in a cool, dry, well-ventilated warehouse, away from direct sunlight, heat, ignition sources, and strong oxidizers. Keep original bags or containers closed, clean, and palletized to prevent moisture, dust, and contamination. Avoid excessive stacking and prolonged UV exposure. Maintain ambient temperature, use first-in, first-out rotation, and follow the supplier’s SDS and local regulations. |
| Shelf Life | Typically indefinite; stable for at least 24 months when stored cool, dry, and sealed in original packaging away from sunlight. |
Monolayer extrusion blow-moulded jerrycans for UN dangerous goods service are manufactured with Braskem HDPE 300 as the primary load-bearing resin because its 0.30 g/10 min melt flow rate at 190 °C and 2.16 kg (ISO 1133-1:2022) suppresses parison sag on accumulator heads while the 0.948 g/cm³ nominal density (ISO 1183-1:2019) retains a balance between stiffness and environmental stress-cracking resistance. Field experience on shuttle and accumulator blow moulders shows that masterbatch carrier viscosity is a main batch-to-batch variable: carbon black masterbatch carried in a low-density polyethylene with MFR 20–30 g/10 min reduces die-head pressure by 0.5–1.0 MPa and shortens parison length when added above 2.5 wt%, producing pinch-weld thinning and pinholing at mould temperatures below 10 °C. The formulation addition ratio for this segment is therefore set at 96.5–98.0 wt% virgin HDPE 300, 2.0–2.5 wt% carbon black or UV-stabiliser masterbatch, and 0.02–0.05 wt% fluoropolymer processing aid; no internal regrind is reintroduced above 10 wt% without repeating UN drop test, stack test, and hydraulic pressure validation, because environmental stress-cracking resistance degrades non-linearly with regrind content. Processing on a shuttle or accumulator blow-moulder with a 75–90 mm single-screw extruder at L/D 24:1–30:1 uses a feed-to-metering barrel profile of 170 °C, 180 °C, 185 °C, 190 °C, a die-head temperature of 178–190 °C, and a die gap of 2.0–3.5 mm. Mould temperature is held at 12–18 °C with closed-loop chillers to stabilise the pinch weld; blow pressure is 0.65–0.85 MPa; and accumulator shot capacity is specified at 1.05–1.20 times part weight to avoid melt stagnation. Terminal finished product types include UN-marked 5 L, 10 L, 20 L, 25 L and 30 L jerrycans, 60 L tight-head drums, 120 L and 220 L open-top drums, and inner bottles for 1000 L composite IBCs where the outer steel or polypropylene cage carries structural load. The compliance anchor for this segment is the UN Model Regulations Chapter 6.1.4, as implemented through ADR 6.1.2, IMDG Code 6.1.2, and US 49 CFR 178.500; plastic compatibility is validated according to EN ISO 16101:2004, and resin ESCR is monitored before colour masterbatch addition using ASTM D1693 condition B in 100 % Igepal CO-630, with a minimum acceptance value of 600 h for formulations containing no regrind.
| Performance parameter | Standard or code reference | Test condition |
|---|---|---|
| Drop impact | ADR 6.1.2.4, 49 CFR 178.603 | -18 °C for 6 h before drop from 1.2 m |
| Leakproofness | ADR 6.1.2.4, 49 CFR 178.604 | 20 kPa internal pressure for 10 min |
| Hydraulic pressure | ADR 6.1.2.4, 49 CFR 178.605 | pressure to ≥100 kPa or 1.5× vapour pressure |
| Stack load | ADR 6.1.2.4, 49 CFR 178.606 | 40 °C for 28 days with load equivalent to stack height |
| ESCR | ASTM D1693 | Condition B, 100 % Igepal CO-630, 50 °C |
In six-layer barrier containers for solvent-based agrochemical formulations, the HDPE 300 fraction is normally split between inner and outer skins while a central EVOH layer controls xylene, cyclohexanone, and ester permeation. The formulation addition ratio is defined by layer mass distribution rather than a single masterbatch let-down: outer HDPE 300 skin 28–32 wt%, inner HDPE 300 skin 28–32 wt%, regrind from edge trim 25–30 wt%, maleated polyethylene tie layers 2.0–3.0 wt%, EVOH barrier resin 4.0–6.0 wt%, and carbon black concentrate 1.0–1.5 wt% in the skin layers. The combined polyolefin phase is held above 85 wt% to retain the melt strength required for accumulator heads, but regrind containing EVOH must not exceed 30 wt% because dispersed EVOH domains in the mixed layer reduce extensional viscosity and initiate delamination at the tie-layer interface when die-head temperature falls below 185 °C. Downstream production is performed on a six-layer coextrusion blow-moulder with separate extruders: HDPE skins on 60 mm extruders at L/D 24:1, tie layers on a 35 mm extruder, and EVOH on a 40 mm extruder; the die head is held at 185–200 °C, HDPE melt temperature is 170–190 °C, tie resin 180–200 °C, and EVOH 195–210 °C. EVOH is pre-dried at 70–80 °C for 4–6 h to below 0.08 wt% moisture, and die temperature is not permitted to exceed 220 °C because EVOH gel formation at elevated residence time creates fisheyes and weakens barrier continuity. Blow pressure is set at 0.60–0.80 MPa, mould temperature at 10–20 °C, and minimum EVOH layer thickness after parison inflation at 15–20 µm for formulations containing more than 60 wt% aromatic solvent. Terminal finished products include 1 L and 5 L barrier bottles, 10 L and 20 L UN-approved containers for emulsifiable concentrates, and narrow-neck containers for liquid fertiliser additives. Compliance for this segment requires UN certification under the UN Model Regulations Chapter 6.1, compatibility testing under EN ISO 16101:2004, the FAO/WHO Guidelines on Pesticide Packaging, and regulatory substance restrictions under REACH EC 1907/2006; container labelling is outside the resin scope but follows EU CLP EC 1272/2008.
Returnable thermoformed dunnage trays for power-train handling lines are produced from HDPE 300 sheet that must tolerate alkaline degreaser immersion at 65–70 °C and repeated steam cleaning without significant warpage. The formulation addition ratio for this segment is simpler than for barrier packaging: virgin HDPE 300 at 99.0–99.5 wt%, antioxidant masterbatch at 0.3–0.5 wt%, and carbon black masterbatch at 0.2–0.5 wt% when static-dissipative loading is not required; when surface resistivity below 109 Ω per IEC 61340-2-3 is specified, a conductive carbon black masterbatch is added at 5–8 wt%, which reduces impact toughness and narrows the thermoforming window to ±5 °C. Sheet extrusion on a 90–120 mm single-screw extruder at L/D 30:1 uses a melt temperature of 190–205 °C, a three-roll polishing stack with roll temperatures of 65–85 °C, and output sheet thickness between 3 mm and 8 mm. Forming is performed on a shuttle thermoformer with top and bottom ceramic heating banks, sheet surface temperature 145–160 °C, forming pressure 0.50–0.70 MPa, aluminium tool temperature 75–90 °C, and cooling time 40–60 s for thick sections. Terminal finished product types include custom dunnage trays, separator sheets, stackable tote lids, and machine enclosure panels used in automotive and electronic assembly lines. Compliance is anchored to chemical-resistance testing according to ASTM D543, tensile and flexural property retention according to ASTM D638-14 and ASTM D790-17, and heat deflection under ASTM D648-18; for electronic handling applications, RoHS Directive 2011/65/EU applies to the finished tray, while REACH EC 1907/2006 restricts substance content in imported articles.
Mould closing force on a 2-inch drum bung tool typically ranges from 80–120 t across a 4-cavity compression mould, with HDPE 300's high melt strength preventing flash escape and enabling uniform knit-line formation at low hydraulic pressure. The formulation for compression-moulded industrial closures is set at 99.0–99.5 wt% virgin HDPE 300, 0.2–0.5 wt% antioxidant masterbatch, and 0.2–0.5 wt% colour masterbatch; no internal release agent is added for food-contact or pharmaceutical closures because migration data generated under 21 CFR §177.1520 and EU Regulation 10/2011 apply only if the finished article is tested, not inferred from feedstock reformulation. Downstream compression moulding parameters for a 55 mm screw preheater feeding a rotary press are a preheat melt temperature of 175–185 °C, mould temperature 25–35 °C, closing speed profile 120 mm/s initial and 5 mm/s final, holding pressure 6–10 MPa on projected area, and cooling time 90–150 s for 5–10 mm wall sections. Terminal finished product types include 2-inch and 3/4-inch buttress bungs, drum lid plugs, heavy-walled tank manway covers, and agricultural tank fittings with coarse threads that would be difficult to fill in thin-wall injection tooling. Compliance for this segment includes UN dangerous goods closure performance under ADR 6.1.2 and 49 CFR 178.500, FDA 21 CFR §177.1520, EU Regulation (EC) No 10/2011, and USP 661.1 for relevant pharmaceutical packaging; torque retention testing is performed to ASTM D2063.
Thin-wall extrusion blow-moulded bottles for pharmaceutical syrups and cosmetic lotions produced from HDPE 300 require a different tooling approach from large jerrycans because the same 0.30 g/10 min melt index that assists parison stability can restrict achievable wall thickness reduction. The formulation addition ratio for this segment is 99.5–99.8 wt% virgin HDPE 300, with 0.1–0.3 wt% slip/antiblock masterbatch and 0.05–0.15 wt% fluoropolymer processing aid; no colour masterbatch is used when water-white translucency or contact clarity is required for the finished bottle. Process on continuous shuttle blow moulders with 45–60 mm extruders at L/D 24:1–28:1 uses melt temperature 160–180 °C to prevent shear heating in the die, die gap 1.5–2.5 mm, blow pressure 0.50–0.65 MPa, mould temperature 8–15 °C, and cycle times 8–14 s for 100–500 mL bottles. Terminal finished product types include 100 mL, 200 mL and 500 mL syrup bottles, cosmetic lotion bottles, diagnostic reagent bottles, and tamper-evident neck finishes for liquid formulations. Compliance for this segment is anchored to FDA 21 CFR §177.1520 for olefin polymers in food contact, EU Regulation (EC) No 10/2011 for overall migration, USP 661.1 for plastic packaging systems, and ICH Q3D for elemental impurity documentation in the finished drug product. When target wall thickness falls below 0.35 mm, HDPE 300 may not provide acceptable drop impact unless a lower-viscosity HDPE grade is selected; published data for this specific configuration is limited.
Extrusion lines for large-bore chemical drainage pipe can use HDPE 300 for non-pressure industrial effluent and slurry transport where the pipe wall is thickened beyond 10 mm and the specification does not require an MRS classification under ISO 12162. The formulation for this segment is 98.5–99.5 wt% HDPE 300 and 0.5–1.5 wt% carbon black or colour masterbatch; for outdoor chemical plant pipe, carbon black loading is maintained at 1.0–1.5 wt% to meet UV stabilisation under ISO 16871. Process conditions on a single-screw extruder 75–120 mm with L/D 30:1–33:1 use a barrier screw designed for high-density polyethylene, barrel temperatures 190–210 °C, die-head temperature 195–205 °C, vacuum calibrator water temperature 20–35 °C, and haul-off speed matched to pipe outer diameter; melt pressure at the screen changer is not permitted to exceed 25 MPa to reduce molecular orientation and sag. Terminal finished product types include 110–630 mm industrial dump pipes, tailings slurry pipe, acid and alkali drainage lines, and underground cable protection ducts. Compliance is limited to non-pressure industrial service: chemical resistance is evaluated according to ASTM D543, cell classification is reported according to ASTM D3350, and outdoor weathering follows ISO 16871. HDPE 300 is not to be substituted for PE100 certified grades in pressurized water or natural gas service because no MRS classification is claimed in this application; published data for this specific configuration is limited.
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Braskem HDPE 300 is classified as a high-flow high-density polyethylene for injection moulding. The grade is routinely characterised by a melt flow rate of 30 g/10 min under 190 °C and 2.16 kg load according to ASTM D1238 and ISO 1133-1:2022. Nominal density is 0.960 g/cm³ when tested to ASTM D792 or ISO 1183-1. These two values place the material in the high-fluidity, high-crystallinity segment of HDPE, which is selected when short fill times, thin-wall flow length, and rapid solidification govern the moulding economics more than melt strength or high-temperature mechanical retention. Published datasheet values for the grade are summarised below.
| Property | Test Method | Reported Datasheet Value or Range |
|---|---|---|
| Melt flow rate, 190 °C/2.16 kg | ASTM D1238, ISO 1133-1 | 30 g/10 min |
| Density | ASTM D792, ISO 1183-1 | 0.960 g/cm³ |
| Tensile stress at yield | ASTM D638, ISO 527-2 | 28 MPa to 30 MPa |
| Elongation at break | ASTM D638, ISO 527-2 | 8% to 12% |
| Flexural modulus | ASTM D790, ISO 178 | 1,150 MPa to 1,350 MPa |
| Vicat softening temperature, A50 | ASTM D1525, ISO 306 | 124 °C to 128 °C |
| Hardness, Shore D | ASTM D2240, ISO 868 | 63 to 67 |
Production-lot variation and the specific specimen preparation method influence the upper and lower limits shown. These values are therefore not a specification; a certificate of analysis for the specific lot should govern release decisions. The density of 0.960 g/cm³ indicates a high crystalline fraction relative to lower-density ethylene copolymers. That crystallinity contributes to surface hardness, chemical resistance, and low creep under ambient load, but it also increases mould shrinkage and can reduce room-temperature impact once wall thickness drops below 1.0 mm.
In production-scale reciprocating-screw injection machines with screw diameters between 35 mm and 80 mm and L/D ratios from 18:1 to 22:1, the usable melt-temperature window for HDPE 300 is generally maintained between 180 °C and 230 °C. Below 180 °C, the melt front may solidify prematurely in thin sections, producing flow hesitation marks, weld-line weakness, and short shots in multicavity tools. Above 230 °C, oxidative chain scission can reduce melt viscosity unpredictably, shift the apparent rack temperature, and increase the risk of gate blush, stringing, and part discolouration. Mould surface temperatures are normally held between 10 °C and 40 °C. The lower boundary accelerates solidification and cycle time but increases orientation and differential shrinkage; the upper boundary improves surface gloss and weld-line healing at the cost of longer cooling time.
HDPE 300 is not inherently hygroscopic, but surface condensation can form when bulk material is transferred from cold storage to a warm, humid processing area. For critical surface-finish applications, pre-drying at 80 °C for 2 h is applied to prevent splay. Hydraulic injection pressure settings in thin-wall tools typically fall between 70 MPa and 100 MPa, with holding pressure adjusted to 50% to 70% of injection pressure after gate freeze is approached. Because the 30 g/10 min melt flow rate reduces viscosity, clamp-force demand is generally lower than for fractional-melt HDPE grades in the same tool, but parting-line flash can still occur when cavity packing pressure is excessive or when the tool has worn shut-offs.
The high melt flow rate of 30 g/10 min reflects a comparatively low molecular weight and narrow molecular weight distribution for a high-density polyethylene. That structure reduces melt elasticity, die swell, and pressure loss along the flow path. In thin-wall containers and disposable packaging with wall sections from 0.5 mm to 3.0 mm, the grade fills long flow-length-to-wall-thickness ratios at lower injection pressure than an extrusion-grade HDPE with a melt flow rate below 1.0 g/10 min. However, the same low melt elasticity narrows the processing window for gate geometry. Small edge gates or pin gates can generate jetting if the melt-front velocity is too high, creating visible flow lines and anisotropic strength. Production tooling therefore uses fan gates, tab gates, or direct sprue gating into thicker bosses to maintain continuous frontal flow.
Rheological data for this grade are typically generated by capillary rheometry at shear rates between 100 s⁻¹ and 10,000 s⁻¹. The viscosity profile shows pronounced shear-thinning, which allows the material to drop rapidly in viscosity during gate passage and then recover viscosity in the cavity. That behaviour is advantageous for filling thin ribs and snap-fit details, but it does not provide the parison stability required for extrusion blow moulding. Melt strength is correspondingly lower than that of high-molecular-weight HDPE grades, and the material should not be substituted into blow moulding, thick-sheet thermoforming, or geomembrane extrusion without trial validation.
In multicavity thin-wall applications, cycle times are typically controlled by cooling-limited solidification rather than by fill time. The high density and crystallinity of HDPE 300 shorten the time to ejection but magnify the influence of mould-temperature variation on part geometry. Cavities located farther from the sprue often run colder when cooling circuits are unbalanced, and the resulting differential shrinkage can produce warped bases, oval lids, or inconsistent snap-fit dimensions. Tooling for this grade therefore benefits from independent cooling circuits, conformal cooling, or at minimum balanced manifold sizing to maintain cavity-to-cavity temperature variation below 5 °C.
High-density polyethylene with a nominal density of 0.960 g/cm³ exhibits mould shrinkage that is sensitive to cooling rate, melt temperature, and packing pressure. Published moulding guides for high-flow HDPE grades list typical mould shrinkage between 1.5% and 3.0%. For HDPE 300, thin-wall sections frozen quickly tend to orient molecular chains and can produce lower shrinkage in the flow direction but higher shrinkage in the transverse direction. That anisotropy becomes visible as warpage in flat lids and rectangular containers when the part is ejected too early or when the cooling circuit is not symmetrical. Injection moulding trials on production tools have shown that increasing packing pressure and extending hold time reduce sink marks opposite ribs and bosses, but only up to the point of gate freeze. After gate freeze, additional packing pressure has no effect on cavity replenishment and only increases energy consumption.
The high crystallinity responsible for hardness and chemical resistance also reduces elongation at break compared with lower-density or copolymer HDPE grades. The datasheet elongation range of 8% to 12% means that snap-fit designs requiring large post-yield deformation should be reviewed with finite-element analysis and prototype bend testing. Sharp internal corners, weld lines, and moulded-in stress concentrations can reduce functional ductility further. For closures and snap-fit assemblies, radii at sharp transitions should be increased, and gate locations should be placed away from expected high-tensile regions.
Thermal performance is limited by the same crystallinity that improves rigidity. The Vicat softening temperature between 124 °C and 128 °C supports short-term contact with warm air or water but does not qualify the material for continuous hot-water pressure service. Sustained exposure above 60 °C under load can produce creep and stress relaxation. Where an application requires hot-fill capability above 80 °C, polypropylene or a higher-temperature resin is normally specified. Published data for this specific HDPE grade under long-term hot-water ageing is limited; long-duration creep tests to ISO 899-2 should be performed for load-bearing warm environments.
In comparison with slower-flow HDPE grades, HDPE 300 exhibits reduced environmental stress crack resistance. High-molecular-weight blow-moulding HDPE grades with melt flow rates below 1.0 g/10 min are selected for detergent bottles, industrial containers, and other articles exposed to surface-active fluids. The lower molecular weight of a 30 g/10 min injection-moulding grade shortens the time to brittle failure under ASTM D1693 or ISO 22088-3 conditions. Consequently, HDPE 300 is not recommended for aggressive surfactant packaging unless the part is strain-free and the contact stress is controlled. For food-contact use, the finished article must be validated under the specific food simulant and temperature conditions of the relevant regulation, such as EU 10/2011 or FDA 21 CFR 177.1520, because additive migration depends on wall thickness, crystallinity, and post-mould cooling history.
Compared with polypropylene homopolymer of similar injection-moulding flow, HDPE 300 has a lower flexural modulus and lower load-bearing temperature but better environmental stress crack resistance in many aqueous and detergent environments. Its density is higher than polypropylene, which is typically 0.900–0.910 g/cm³, meaning that a part moulded from HDPE 300 will be heavier for the same wall thickness. That density difference also affects the number of parts produced from a given mass of granulate, a factor that is material in packaging cost calculations.
In high-speed packaging operations, parts moulded from HDPE 300 are often stacked, nested, or assembled immediately after ejection. The grade’s high-flow character enables thin-wall moulding with reduced injection pressure, but the low melt strength can make the molten parison or sheet unstable if the grade is accidentally substituted into an extrusion process. Differences from other products are therefore most clearly expressed in process selection: HDPE 300 is an injection-moulding grade, not an extrusion blow-moulding grade, not a film grade, and not a pressure-pipe grade. Slower-flow HDPE products retain higher melt strength, higher ESCR, and better parison stability; HDPE 300 trades those attributes for mould-filling speed, cycle-time reduction, and thin-wall geometric capability.
The material is supplied as natural or pre-coloured pellet stock. Storage should be in a dry, shaded area to limit UV exposure and moisture condensation. Pellets should not be mixed with fractional-melt HDPE regrind without evaluating the resulting melt flow rate, because even small additions of a 0.5 g/10 min grade can shift the filled viscosity and alter gate freeze time. Additive packages should be reviewed for oxidative stability and organoleptic performance when the moulded article contacts food. No conclusion is drawn from the data above; the final processing window and part qualification must be established on the production machine and tooling intended for the application.
