| HS Code | 635546 |
| Density | 0.940 g/cm³ |
| Melt Flow Rate 190 C 2 16 Kg | 4.0 g/10 min |
| Tensile Strength At Yield | 24 MPa |
| Tensile Strength At Break | 33 MPa |
| Elongation At Break | >600% |
| Flexural Modulus | 1100 MPa |
| Notched Izod Impact At 23 C | 80 J/m |
| Vicat Softening Point | 125 °C |
| Heat Deflection Temperature At 0 45 Mpa | 75 °C |
| Hardness Shore D | 65 |
| Melting Point | 130 °C |
| Environmental Stress Crack Resistance 10 Igepal | >1000 h |
| Water Absorption | <0.01% |
| Volume Resistivity | >10^16 ohm-cm |
| Dielectric Constant At 1 Mhz | 2.3 |
| Dissipation Factor At 1 Mhz | 0.0005 |
As an accredited Braskem HDPE 4040 factory, we enforce strict quality protocols—every batch undergoes rigorous testing to ensure consistent efficacy and safety standards.
| Packing | Braskem HDPE 4040 is packaged in 25 kg polyethylene-lined paper bags, typically palletized at 1,375 kg per pallet. |
| Container Loading (20′ FCL) | 20′ FCL container loading of Braskem HDPE 4040: 25 kg bags, palletized, shrink-wrapped, evenly secured, non-hazardous, for dry ocean shipment. |
| Shipping | Braskem HDPE 4040 is shipped as non-hazardous solid polyethylene pellets in 25 kg bags or 1,000 kg bulk bags, palletized and stretch-wrapped. Store in cool, dry conditions away from direct sunlight and ignition sources. Not regulated for transport. Maintain package integrity; prevent moisture and contamination. Handle per local regulations. |
| Storage | Store Braskem HDPE 4040 in a clean, dry, well-ventilated warehouse at ambient temperature. Keep original bags or containers closed to prevent moisture, dust, and contamination. Protect from direct sunlight, UV radiation, heat, and ignition sources. Keep away from strong oxidizers. Use first-in, first-out stock rotation, avoid excessive stacking, and ensure packaging remains intact and labeled. |
| Shelf Life | Typically two years when stored in original packaging, in a cool, dry, ventilated area away from direct sunlight. |
Braskem HDPE 4040 enters injection moulding cells predominantly as a flow-optimised feedstock for still-beverage closures, dairy closures, snap-on overcaps, and tamper-evident lids. In closure tools above 32 cavities, the melt flow rate of 4.0 g/10 min under ASTM D1238 at 190 °C/2.16 kg reduces pressure drop through hot runner manifolds and allows balanced filling when valve gate sequencing is adjusted for melt compressibility. The nominal density of 0.940 g/cm³ under ASTM D1505 provides enough cap wall stiffness to resist ovalisation after demoulding, but roundness maintenance below ±0.05 mm requires core temperatures between 8 °C and 20 °C and a profiled holding-pressure decay rather than an abrupt step transition. On 48-cavity hydraulic tools with 1,600 kN to 2,500 kN clamp force ranges, screw recovery time is typically shorter than cap cooling time, so upstream flake dosing must hold bulk density above 0.50 g/cm³ to prevent feed-bridge stall and shot mass drift. Weld-line tensile strength should be checked on moulded shoulder sections under ASTM D638 at 50 mm/min, because low melt temperature operation near 190 °C may produce weaker knit lines at cap hinge intersections. Food-contact cap applications require a declaration of compliance to FDA 21 CFR 177.1520 and EU Regulation (EU) No 10/2011, with the operator monitoring overall migration below 10 mg/dm² and recording regrind origin to maintain batch traceability.
Thin-wall food packaging manufactured from Braskem HDPE 4040 covers margarine tubs, yogurt cups, freezer tubs, and single-serve dairy pots with nominal wall sections between 0.4 mm and 0.8 mm. In stack moulds running 24 to 64 cavities on high-speed injection presses, the critical processing constraint shifts from melt flow path to gate freeze time: if the gate does not seal below 0.5 mm wall thickness before hold pressure is removed, the cavity depressurises through the gate and the part develops sink marks adjacent to the gate boss. Fill speed is typically set above 180 mm/s on thin-wall machines with accumulators and boost pressure capabilities of 180 MPa to 220 MPa at the injection nozzle. Melt temperature is held between 190 °C and 220 °C because lower settings increase viscosity at the gate and higher settings prolong cooling time and may induce flash in sharp corner sections. Mould temperature should remain between 15 °C and 30 °C with turbulent water flow through 6 mm circuits; laminar flow or undersized channels in high-cavity stack moulds create side-to-side wall variation exceeding ±0.03 mm. Drying is not required for the virgin resin, but condensation on cold pellets at relative humidity above 60% can produce surface splay and requires hopper air heating to 70 °C for a minimum of 1 h. Compliance for food-contact use is governed by FDA 21 CFR 177.1520 for olefin polymers and by EU Regulation (EU) No 10/2011, with overall migration testing performed under aqueous and fatty food simulants according to EN 1186 series methods.
| Processing variable | Closure tool 48-cavity | Thin-wall container tool 32-cavity | Open-head pail tool 1-cavity |
|---|---|---|---|
| Melt temperature | 195–230 °C | 190–220 °C | 200–240 °C |
| Mould temperature | 8–20 °C | 15–30 °C | 10–25 °C |
| Hold pressure | 30–50 MPa | 40–60 MPa | 50–75 MPa |
| Cycle time range | 4.5–7.0 s | 3.2–5.5 s | 30–60 s |
| Shot-to-shot mass tolerance | ±0.12 g | ±0.05 g | ±1.5 g |
Industrial pail and open-head container moulding uses the same grade but shifts the critical control point from flow-length ratio to drop-impact energy absorption and UN transport certification. On 1-cavity 20 L pail tools mounted to clamp units between 6,000 kN and 12,000 kN, Braskem HDPE 4040 fills thick rim and handle sections without jetting when a slow initial injection speed is programmed for the first 10% of shot volume, followed by a velocity ramp to the main filling phase. Moulded pails intended for hazardous goods under UN Model Regulations Packing Group II must pass a drop test at 1.2 m at -18 °C after conditioning for 24 h; residual gate stress at the pail base can initiate brittle failure if gate land length exceeds 1.5 mm or if the hot runner tip temperature overshoots above 250 °C. Post-consumer regrind addition above 15 wt% reduces dart impact resistance and should be matched with a sieve size below 6 mm and a fine screen pack of 60/80/100 mesh during re-extrusion. The pail application is a generic and well-established practice: the resin must simply be dried only when condensation is visible, and no special compounding is required for natural or pigmented formulations.
Agricultural chemical closures expose HDPE 4040 to surfactants, hydrocarbon solvents, emulsifiable concentrates, and oxidising agents that accelerate environmental stress cracking at hinge roots and thread undercuts. The limiting property is not tensile strength but stress-crack resistance measured under ASTM D1693 Condition B in 10% Igepal CO-630 at 50 °C; published data for this specific configuration is limited, but closure producers using the grade should maintain failure time above 100 h on moulded specimens rather than compression-moulded plaques, because frozen-in orientation in cap walls changes crack growth direction. Thread design should avoid sharp root radii below 0.20 mm and should use a continuous buttress profile rather than a square thread, because low root radius combined with high residual hoop stress causes radial cracks within 30 days of accelerated exposure. Removal torque retention must be tested under ISO 8317 type procedures with a closure application torque of 1.8–2.5 N·m on a 28 mm PCO finish; torque loss exceeding 30% after 72 h at 40 °C indicates excessive compressive stress relaxation in the cap sidewall. Fatty amide slip agents used for torque control should be limited to 0.1–0.3 wt% because higher loadings increase migration to the sealing surface and may violate sensory neutrality under EN 1622 odour testing. Avoid combining the grade with amine-based antistatic additives in concentrate form, since the resulting alkaline hydrolysis products can accelerate notched stress cracking in the presence of residual catalyst residues.
Crate and tote moulding with Braskem HDPE 4040 requires tooling compensation for post-ejector shrinkage because the density of 0.940 g/cm³ produces mould shrinkage in the range of 0.012–0.025 mm/mm depending on wall thickness, gate location, and melt temperature setpoint. On hydraulic clamp units from 3,000 kN to 8,000 kN running single- or double-cavity crate tools, the dominant defect is warp at long unsupported side walls, which is controlled by cooling channel centreline spacing no greater than 50 mm and by minimising differential shrinkage between the thick top rim and the thin side wall. Rib thickness should not exceed 60% of nominal wall thickness to prevent sink marks and increase cycle time; full-round corners at rib intersections reduce crack initiation when returnable crates are stacked under load. Ejection temperatures should be below 60 °C and core pull must be sequenced with a delay of 0.3–0.8 s after clamp break, because early ejection at 70 °C produces push-pin marks and localised stress whitening. Moisture conditioning is not required for dimensional stability, but creep under stacked load must be verified by EN 15512 type loading methods for storage racks; a 24 h creep test at 40 °C and 50% relative humidity should show deflection less than 1.5% of span under 1 MPa bearing stress.
Toy and houseware moulding under EN 71-3 and FDA 21 CFR 177.1520 imposes a constrained additive package because the converter cannot use industrial regrind from unknown sources without verifying migration properties and elemental release. The melt flow rate of 4.0 g/10 min fills detailed multi-cavity tools for building blocks, storage baskets, and interlocking components, but ejection temperatures must stay below 60 °C to avoid deep-core pull-out on textured surfaces. The moulding process for simple housewares is a single-sentence zone: the resin is melted at 200–230 °C and injected into well-drafted tools with mould temperatures of 15–30 °C. For toys, elemental migration testing under EN 71-3:2019+A1:2021 must cover all 19 listed elements, and the converter must document that no cadmium-, lead-, or barium-based stabilisers are present in colour concentrates. The grade’s low water absorption means drying is generally unnecessary, but bulk storage silos should be purged with dry air at -20 °C dew point if ambient relative humidity exceeds 70%.
Post-consumer recyclate blending with Braskem HDPE 4040 is applied in industrial pails, crates, and non-food closures where the melt flow rate of 4.0 g/10 min tolerates viscosity shifts from high-molecular-weight recycled feedstock. The blend ratio for closed-loop pail regrind can reach 15–25 wt% without exceeding a shot mass deviation of ±1.5 g, provided the regrind is screened below 6 mm and melt filtered through a 60/80/100 mesh pack before pelletising. At 30 wt% recycled content, published data for this specific configuration is limited, but producers should expect a drop in melt flow rate to approximately 2.5–3.5 g/10 min and increased variability in laser-gate freeze time. The processing window narrows at high recycled content because melt temperature must stay below 240 °C to avoid gel formation from crosslinked polyethylene contamination, while holding pressure must remain above 45 MPa to pack out thicker pail rims. Degassing by vacuum venting at -0.08 MPa reduces porosity from volatile organic residues in household detergent bottles, but degassing alone does not remove polypropylene contamination, which creates surface pitting and delamination at interfaces above 2 wt%. The converter should separate polypropylene closures from polyethylene bottles by flotation in a water bath with a density cut at 0.97 g/cm³, because sink-float sorting rejects higher-density contaminants and protects the internal tear resistance of the moulded part.
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Braskem HDPE 4040 is a high-density polyethylene grade intended for extrusion blow moulding of rigid containers with nominal volume up to 5 L. The resin is specified by a melt mass-flow rate of 0.40 g/10 min at 190 °C/2.16 kg and a density of 0.940 g/cm³, placing it within the medium-molecular-weight segment of the supplier’s HDPE portfolio. It is supplied as natural or colour-compounded pellets and is typically processed on shuttle, reciprocating screw, or rotary blow moulding equipment. This technical profile describes material classification, processing boundaries, application-specific test requirements, regulatory verification, and substitution criteria. All values are nominal supplier values unless a specific lot certificate is referenced.
The grade belongs to the PE-HD class under ISO 1872-1, with the density value indicating a high-density polyethylene backbone. Comonomer type and molecular architecture are not stated on the standard certificate; the density of 0.940 g/cm³ suggests controlled short-chain branching for stress-crack resistance rather than a highly linear homopolymer. For classification and incoming inspection, the two primary property anchors are melt mass-flow rate and density.
| Property | Test method | Typical value | Control basis |
|---|---|---|---|
| Melt mass-flow rate | ISO 1133-1:2022 / ASTM D1238-20 | 0.40 g/10 min | 190 °C, 2.16 kg |
| Density | ISO 1183-1:2019 / ASTM D792-20 | 0.940 g/cm³ | Base resin after conditioning |
| Tensile yield stress, ESCR, notched impact | ISO 527-2, ASTM D1693, ISO 8256 | Lot-dependent | Request supplier certificate |
The density of 0.940 g/cm³ provides a balance between container stiffness and environmental stress-crack resistance in short-term packaging. It is not a barrier polymer, and permeation rates for oxygen or water vapour must be assessed according to ISO 15106-1, ASTM F1249, or equivalent when shelf-life claims are made. Because the material is an olefin polymer, it is inherently hydrophobic but does not provide high-gas barrier unless combined with fluorination, multilayer structures, or surface coatings.
The principal differentiator is the melt mass-flow rate of 0.40 g/10 min. In extrusion blow moulding, a lower MFR generally correlates with higher elongational viscosity, longer parison hang time, and reduced sag prior to mould closure. Grades with MFR above 0.70 g/10 min tend to exhibit shorter parison lengths and higher screw output at the same die pressure, but they may show increased melt fracture when die-land shear rates exceed the critical value. HDPE 4040 is therefore selected when wall-thickness distribution in large or complex containers is controlled by parison sag rather than by cycle-time reduction.
Molecular weight distribution is not stated on the standard certificate. Melt flow ratio I21/I2 should be obtained from the supplier when comparing blow moulding grades because it affects shear thinning and die-pressure response. A high-shear viscosity curve measured on a capillary rheometer according to ISO 11443 is the appropriate method to detect differences in die-entry pressure, melt fracture, and extensional viscosity under production shear rates. Published data for this specific configuration is limited; plant trials should be performed if the converter requires a shear-viscosity model for process simulation.
In continuous-extrusion blow moulding lines equipped with screw diameters from 45 mm to 90 mm and L/D 24:1 to 30:1, the recommended barrel temperature profile for this melt-flow class is generally 170 °C to 210 °C, with the die head held 5 °C to 10 °C below the front barrel zone. The low-shear screw design should use a compression ratio of 3.0:1 to 4.0:1 and a metering depth selected for low shear heating. Die land length of 10 mm to 15 mm and a die gap of 0.8 mm to 1.5 mm are common starting points for containers from 200 mL to 5 L. Screen packs of 20/40/60 mesh or 40/60/80 mesh are used depending on regrind level; excessive screen pressure indicates gel contamination or insufficient filtration.
Moisture absorption is normally low for HDPE, but storage at relative humidity above 60 % or outdoor exposure can condense water on pellet surfaces. A desiccant dryer at 70 °C to 80 °C for 2 h to 3 h is recommended if surface moisture exceeds 0.05 % by weight, as steam bubbles and unstable parison length become visible in the moulded part. Melt temperature should not exceed 220 °C for prolonged residence periods because oxidative degradation reduces melt strength and may create odour in the finished container.
During mould close delay, gravitational stress acts on the molten parison and produces thickness reduction in the upper segment. For HDPE 4040, the practical control of sag is achieved by adjusting melt temperature within a ±5 °C band at the die head; deviations beyond this range are typically observed as changes in upper wall thickness and handle pinch-off quality. Blow-up ratios between 2.0:1 and 3.0:1 and mould cooling water at 10 °C to 20 °C are used to stabilise the frost line and control shrinkage. When the parison is highly coloured or contains high levels of post-consumer recycle, melt strength may drop, and mould close speed should be increased rather than raising melt temperature.
Die swell is another die-face variable influenced by molecular weight distribution, melt residence time, and die gap. It affects the relation between die diameter and final bottle wall thickness. Die swell should be measured on the actual head using a short-shot trial because no universal die swell coefficient is supplied for the grade. Melt strength may be measured with a Rheotens-type extensional rheometer, but the supplier does not publish a standard value for HDPE 4040; comparative testing with the converter’s incumbent grade is therefore recommended before tooling modifications.
The application envelope includes household and industrial chemical containers, personal-care packaging, pharmaceutical packaging, and packaging for non-food and food contact when the appropriate migration and organoleptic qualifications are completed. Applications requiring environmental stress-crack resistance should be evaluated by ASTM D1693-21 condition B in 100 % Igepal CO-630 at 50 °C; because ESCR is a function of comonomer distribution and moulded-in stress, lot-specific values rather than a single nominal value should be used for bottle qualification. Weld lines, handle pinch-off areas, and sharp corners are the usual failure initiation sites. Stacking performance is tested by top-load retention at 23 °C or 40 °C following ASTM D2659-16 or an equivalent method, while drop impact is evaluated by ASTM D2463-15 at 1.2 m for packages up to 5 L.
Regrind usage up to 30 % by weight is common in industrial blow moulding if the ratio is controlled and the incoming scrap is clean and dry. Higher regrind levels reduce ESCR, drop impact resistance, and parison uniformity. Regrind must not be re-introduced without melt-flow and density verification because thermal history shifts MFR upward and changes the I21/I2 ratio.
The base resin is a polyolefin. Compliance with food-contact uses is assessed under FDA 21 CFR 177.1520 for olefin polymers. In the European Union, migration testing follows Regulation (EU) 10/2011, with overall migration limit 10 mg/dm² for general food contact and simulant selection governed by food type and temperature. Supplier compliance statements cover the base resin only; converter-specific additives, colour masterbatches, recycled content, and processing aids must be re-evaluated because they are not covered by the base resin statement.
| Regulation / designation | Test or clause | Application scope | Operational boundary |
|---|---|---|---|
| FDA 21 CFR 177.1520 | Olefin polymers | Food-contact articles | Conditions of use from 21 CFR 176.170(c); base resin only |
| EU 10/2011 | Overall migration | Plastic food-contact materials | OML 10 mg/dm²; specific migration limits apply to additives |
| REACH | EC 1907/2006 | EU market articles | No intentionally added SVHC; imported articles subject to Article 33 |
| RoHS | Directive 2011/65/EU | Electrical and electronic equipment packaging | Not relevant unless component is part of EEE |
For dangerous goods packaging, UN certification is performed on the finished container under the applicable sub-sections of 49 CFR 178 or the UN Recommendations on the Transport of Dangerous Goods, not by a single material test. The material must survive leakproofness, drop, and stacking tests at the specified containment level, and wall-thickness distribution is more decisive than resin density for UN qualification. Containers for aggressive chemicals should also be evaluated for environmental stress-crack resistance when filled, because stress-cracking agents can reduce the permissible top-load or drop height.
HDPE 4040 is not a direct substitute for injection moulding grades. Injection grades are commonly specified at 190 °C/2.16 kg with MFR values from 4 g/10 min to 20 g/10 min, and tool filling in cold-runner moulds depends on much lower viscosity. If HDPE 4040 is used in an injection press, clamp force, injection pressure, and gate dimensions must be re-qualified; otherwise, short shots, warpage, and high residual stress occur. Similarly, film-extrusion HDPE grades are designed with different melt fracture control and may include higher levels of slip or antiblock additives. Within blow moulding, HDPE 4040 should be compared with other Braskem blow moulding grades by measuring melt flow ratio, die swell, ESCR, and colour on the same lot, because the product code alone does not capture additive pack or comonomer differences.
Pellets should be stored in closed silos or bags away from direct sunlight, oxidising agents, and sources of ignition. Protection from UV weathering after demoulding is achieved by carbon black or UV stabilisers added at the converter’s masterbatch; the base resin is not weather-resistant. In warm climates, silo or railcar residence above 40 °C should be avoided to limit antioxidant consumption and odour development. Bags should be resealed to prevent condensation, and outdoor storage should be minimised even when palletised under shrink film.
In a typical 2.5 L household chemical container line using a shuttle blow moulding machine with 60 mm screw and 24:1 L/D, the feed throat is maintained below 40 °C, the die programme uses a parison taper of 15 % to 25 % between top and bottom, and the mould is run at 15 °C to 20 °C to control sink marks. Cycle time is governed by cooling and by the ejection temperature; for this grade, demoulding below 70 °C surface temperature reduces handle distortion. Drop impact and stack testing per ASTM D2463-15 and ASTM D2659-16 are performed on first production lots, and lot data should be retained for complaint investigation.
