| HS Code | 541392 |
| Density | 0.954 g/cm³ |
| Melt Flow Rate | 0.14 g/10 min (190°C/2.16 kg) |
| Tensile Strength At Yield | 26 MPa |
| Tensile Strength At Break | 30 MPa |
| Elongation At Break | 600% |
| Flexural Modulus | 1200 MPa |
| Notched Izod Impact | 80 J/m |
| Environmental Stress Crack Resistance | >1000 h |
| Vicat Softening Point | 126°C |
| Melting Temperature | 131°C |
| Hardness Shore D | 65 |
| Water Absorption | <0.01% |
| Thermal Conductivity | 0.45 W/m·K |
| Dielectric Constant | 2.3 |
As an accredited Braskem HDPE 0144 factory, we enforce strict quality protocols—every batch undergoes rigorous testing to ensure consistent efficacy and safety standards.
| Packing | Braskem HDPE 0144 comes in 25 kg polyethylene bags, securely palletized and stretch-wrapped on standard pallets for industrial shipping. |
| Container Loading (20′ FCL) | 20′ FCL loaded with Braskem HDPE 0144, 25 kg bags on pallets, shrink-wrapped and securely braced; approximately 24–25 MT net. |
| Shipping | Braskem HDPE 0144 is a non-hazardous polyethylene resin supplied as solid pellets. It is not regulated for transport, with no UN number, hazard class, or packing group. Ship in sealed bags, octabins, or bulk containers. Keep dry, cool, and away from direct sunlight, heat, and contamination. |
| Storage | Store Braskem HDPE 0144 in a cool, dry, well-ventilated warehouse, away from direct sunlight, heat, sparks, flames, and moisture. Keep original bags or containers closed and palletized; prevent contamination, dust, and static buildup. Avoid excessive stacking and follow local regulations and the manufacturer’s SDS. Maintain clean, labeled storage areas with spill containment and first-in, first-out stock rotation. |
| Shelf Life | Braskem HDPE 0144 typically has no fixed shelf life; store cool, dry, away from sunlight, moisture, and contaminants in original packaging. |
Braskem HDPE 0144 is positioned as a high-molecular-weight blow-molding high-density polyethylene with a nominal melt flow rate of 0.44 g/10 min under ASTM D1238-20 at 190°C/2.16 kg and a nominal density of 0.944 g/cm³ under ASTM D1505-18. The combination of low melt flow and moderate density produces a parison with sufficient melt strength for shuttle and accumulator-head blow molding of containers above 500 mL. The grade is not classified as an injection-molding or thin-wall injection grade. Drying of unopened material is generally unnecessary when silo-to-hopper transfer occurs below 60% RH, but condensation on pellet surfaces must be avoided when the pellet temperature is more than 5°C below the air dew point. Start-up purges are typically performed with a fractional-melt HDPE of similar viscosity to avoid the torque peak associated with direct transition from a higher-flow grade.
Extrusion blow molding of household chemical containers uses continuous shuttle machines with extruder diameters from 65 mm to 90 mm and grooved-barrel feed zones rated for HDPE melt temperature control between 176°C and 204°C. The parison is extruded through a diverging die head with a die gap set between 1.4 mm and 2.0 mm for a 1 L bottle at 28–34 g. Wall thickness distribution is controlled by a 64-point radial die programmer and a parison programmer synchronized with mold close. In bleach- and detergent-containing bottles, the dominant long-term failure mode is not burst but stress cracking at the pinch-off weld, the handle attachment zones, and the base corners where frozen-in orientation is highest. Environmental stress crack resistance is evaluated on molded plaques under ASTM D1693-15e1, Condition B, in 100% Igepal CO-630 at 50°C. For blow-molding HDPE in this melt-flow class, F50 values are frequently reported between 400 h and 1000 h, and the lot-specific certificate of analysis is used for release rather than a nominal datasheet value. Container validation includes drop impact at -18°C after 24 h conditioning per ASTM D2463-15. Converters running aggressive surfactant formulations reduce regrind content to below 20 wt% because low-molecular-weight tail fractions from repeated extrusion lower ESCR disproportionately. A process boundary is observed when melt temperature exceeds 215°C; oxidative chain scission begins to raise melt flow rate and reduces ESCR even though short-term drop impact may remain acceptable.
UN-rated jerrycans and industrial pails produced from Braskem HDPE 0144 require the pinch-off zone to be treated as a structural weld rather than a trim remnant. Accumulator-head machines with 2.5–5 kg shot capacity and clamp force from 150–350 kN are used for containers from 5 L to 30 L. The parison is programmed to increase wall thickness at the top and bottom pinch-off regions by 15–30% relative to the sidewall nominal value because the weld area is the initiation point for both drop impact at -18°C and stack-load creep at 40°C. For a 20 L jerrycan, sidewall thickness is typically maintained between 1.2 mm and 1.6 mm, while corners and handle bridges are not less than 1.8 mm. Design qualification follows 49 CFR 178.509 for plastic jerricans, including a leakproofness test, an internal hydraulic pressure test, a drop test, and a stack test. The stack test is run for 28 days at 23°C and in a separate sequence at 40°C to account for creep modulus loss.
In mixed hydrocarbon service, containers are often surface-fluorinated inline to reduce solvent permeation and swell. Fluorination is applied at low level for barrier improvement without altering the base polymer ESCR. The processing window for regrind use narrows when fluorinated regrind is recycled into the parison; converters limit fluorinated regrind to 15 wt% to avoid surface roughness and weld-line weakness. If the fluorination level is too high, the inner surface hardens and the drop test at -18°C produces brittle flaking at the pinch-off weld. The tension between permeation barrier and impact retention is resolved by measuring the fluorine-to-carbon ratio on the inner surface and by monitoring container weight gain after 30 days in a mixed hydrocarbon simulant.
| Application | Stress-cracking system | Governing test or standard | Critical processing limit |
|---|---|---|---|
| Household chemical bottles | Sodium hypochlorite, anionic/nonionic surfactants | ASTM D1693-15e1, ASTM D2463-15 | Regrind below 20 wt%; melt temperature alarm at 215°C |
| UN jerrycans | Mixed hydrocarbon simulant, stack load | 49 CFR 178.509 | Sidewall 1.2–1.6 mm; corners and handle bridges 1.8 mm minimum |
| Small fuel containers | Ethanol, toluene, oxygenated fuel | 40 CFR 1060.103 | Tie-layer thickness 2% minimum; regrind limited to outer layer at 15–20 wt% |
| Personal care and pharmaceutical bottles | Non-aggressive topical formulations | 21 CFR 177.1520, USP 661.1 | Regrind below 30 wt%; blow-pin temperature below 60°C |
| Agrochemical containers | Xylene, cyclohexanone, n-methyl-2-pyrrolidone | ASTM D1693-15e1 plus formulation immersion | Fluorination F/C ratio 0.05–0.10; 14 days at 50°C |
| Diesel exhaust fluid containers | Urea solution, high-purity water | ISO 22241-3:2017 | Melt temperature 195°C maximum; screw speed 35–55 rpm |
Multilayer blow molding of off-road engine fuel tanks and portable fuel containers uses Braskem HDPE 0144 as the structural and outer layer, with ethylene-vinyl alcohol copolymer as a hydrocarbon barrier and maleated HDPE tie resins for interlayer adhesion. The melt streams are combined in a six-layer accumulator head with layer distribution controlled by independent gear pumps or extruder speed ratios. The HDPE outer layers are processed at 200–220°C; the EVOH stream is held at 195–215°C; and the tie resin is kept within 190–210°C to prevent viscosity mismatch. A critical defect occurs when the tie-layer thickness falls below 2% of the total wall thickness, producing delamination at the HDPE–EVOH interface during low-temperature drop impact. For a 20 L fuel container at 2.5 mm total wall thickness, the barrier layer is typically 3–5%, tie layers combined 3–4%, and HDPE layers 90–93%. Hydrocarbon permeation is controlled by the EVOH layer and verified on production containers under the applicable evaporative emission limit in 40 CFR 1060.103 for nonroad fuel tanks.
The coefficient of thermal expansion mismatch between HDPE and EVOH produces interlayer shear stress during cooling. Mold temperature is therefore held at 12°C to 18°C to set the HDPE skin rapidly before the barrier layer freezes. Published data for Braskem HDPE 0144 in fuel blends above 85% ethanol is limited; converters must run their own ESCR and permeation matrix rather than extrapolating from a single fuel simulant. The regrind stream from multilayer scrap is restricted to 15–20 wt% and is fed only into the outer HDPE layer to avoid contaminating the barrier or tie layers.
Blow molding of personal care and pharmaceutical bottles from Braskem HDPE 0144 shifts the control variable from environmental stress crack resistance to organoleptic neutrality and surface defect elimination. Mold temperature is maintained between 12°C and 25°C with closed-loop chilled water to avoid flow lines and gloss loss on tall oval containers. The blow-pin temperature is kept below 60°C to prevent neck finish distortion and ovality above 0.3 mm on a 24-410 finish. For pharmaceutical use, converter qualification is based on 21 CFR 177.1520 for olefin polymers and USP 661.1 for plastic packaging systems. Extractables testing is performed under the conditions of intended use rather than assuming generic compliance. Regrind from trim must not exceed 30 wt% when organoleptic panel results are part of acceptance. Published data on Braskem HDPE 0144 for parenteral or ophthalmic primary packaging is limited; the grade is generally used for solid dose and topical containers where the closure and liner dominate the barrier equation. If splay or black specks appear, the screw, die head, and accumulator are purged with a fractional-melt HDPE purge compound before reintroducing regrind.
Agricultural chemical containers blow-molded from Braskem HDPE 0144 require qualification against solvent-based formulations containing xylene, cyclohexanone, or n-methyl-2-pyrrolidone. ESCR tests under ASTM D1693-15e1 are supplemented by bottle immersion in the actual formulation at 50°C for 14 days followed by -18°C drop testing. The test sequence is designed to detect craze initiation at the pinch-off weld where molded-in stress is highest. Wall thickness is not uniform; the base chime and handle areas are programmed to be 25–40% thicker than the sidewall. A 1 L agrochemical bottle at 45–52 g uses an accumulator-head machine with a 90 mm grooved-barrel extruder, melt temperature 190–205°C, and mold temperature 15°C to 20°C.
Fluorination or sulfonation post-treatment is applied for low-permeation formulations. After fluorination, the inner surface fluorine-to-carbon ratio is typically controlled at 0.05–0.10 for barrier improvement without forming a brittle layer. If the F/C ratio exceeds 0.15, the container loses elongation at the inner surface and the drop test produces microcracks that are not detected by a simple leak test. Converters also monitor parison sag on long-stroke parts; at melt temperatures above 210°C, sag increases nonlinearly and the programmed thickness profile no longer matches the mold geometry. Published data for specific active ingredient formulations is limited; qualification therefore uses the production bottle with the actual solvent system rather than generic ESCR plaques alone.
Technical fluid containers for diesel exhaust fluid use Braskem HDPE 0144 in monolayer construction where high-purity water solutions of urea must not extract polymer oligomers that could foul SCR dosing systems. The blow-molding parameters are set to minimize shear heating: screw speed is held between 35 rpm and 55 rpm on an 80 mm extruder, and melt temperature is capped at 195°C. The container is tested for leachable organic carbon after 14 days at 40°C with DEF per ISO 22241-3:2017. The pinch-off weld is post-cooled in the mold until the flash reaches 70°C before ejection to reduce stress whitening at the weld line. Regrind from post-consumer or cross-contaminated streams is not used; only in-house trim is allowed below 25 wt%. The drop test is performed at -20°C with a 10 L container filled to 90% capacity, and the pass criterion requires no split at the weld or neck.
Automotive windscreen washer reservoirs are extrusion blow molded from Braskem HDPE 0144 because the container must retain impact strength after exposure to methanol-water mixtures at -30°C. The reservoir is a complex three-dimensional shape with integrated mounting tabs, pump grommet interfaces, and a slender neck; mold halves are cooled to 10°C to 18°C. Blow pressure is set at 0.45–0.65 MPa and blow time is extended until internal flash temperature falls below 80°C to control post-mold warpage. Burst testing is conducted by filling the part with a 50/50 vol% methanol-water solution at -30°C and pressurizing to 0.20 MPa after 24 h conditioning. The pinch-off weld at the mounting boss must withstand a 2 m drop at -30°C without fracture; converters adjust parison programming to increase weld thickness by 20–30% over the nominal sidewall. Published data for this specific reservoir configuration is limited; performance therefore is verified on production parts rather than inferred from resin datasheet values.
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Braskem HDPE 0144 is a high-molecular-weight high-density polyethylene supplied in pellet form for extrusion blow molding of rigid and semi-rigid containers. Manufacturer-published nominal values place the density at 0.944 g/cm³ and the melt mass-flow rate at 0.14 g/10 min when tested at 190°C with a 2.16 kg load under ISO 1133-1:2022. The product occupies a low-flow, high-viscosity segment of the HDPE family, which distinguishes it from injection-molding grades having melt mass-flow rates higher than 1 g/10 min and from thin-wall film grades designed for high-shear processing. The lower melt index, in combination with the 0.944 g/cm³ density, produces a balance of environmental stress-cracking resistance, melt strength, and container top-load performance that is generally specified for detergent bottles, agrochemical containers, lubricant containers, and small industrial jerrycans. Because the product is a blow-molding grade rather than an injection-molding grade, it is not suited to thin-wall injection tools with flow-path ratios above 200:1; melt viscosity at shear rates typical of injection filling can generate cavity pressure requirements beyond standard press capacities.
The controlling material property in HDPE 0144 is environmental stress-cracking resistance, evaluated by ASTM D1693-15 Method B in 100% Igepal CO-630 at 50°C. In blow-molded containers carrying surfactant-based detergents or agrochemical formulations, failure initiates when polyethylene tie-molecule density at the container surface is insufficient to resist crack propagation from molded-in stress concentrations at pinch-off and weld regions. The grade’s low melt mass-flow rate corresponds to a higher molecular weight distribution relative to general-purpose HDPE blow-molding products, increasing the population of load-bearing tie molecules. The density of 0.944 g/cm³ is also lower than densities of 0.955–0.965 g/cm³ common in rigid HDPE packaging, reducing crystalline lamellae thickness and imparting ductility at stress risers.
Downgauging trials on production-scale shuttle blow molders require validation of container stress-cracking in the filled state, not only on molded plaques. The relevant method is ASTM D2463-15 or a container-specific ESCR protocol in which the bottle is filled with the intended chemical formulation and capped at torque values of 2–5 N·m. Failure is typically defined as visible craze development on the lower sidewall or pinch-off edge within 30 days of storage at 40°C. Published data for this specific configuration is limited; each formulation change is therefore verified by lot-level ESCR testing.
| Property | Test method | Typical envelope |
|---|---|---|
| Density | ISO 1183-1:2019 | 0.943–0.946 g/cm³ |
| Melt mass-flow rate | ISO 1133-1:2022 | 0.12–0.16 g/10 min at 190°C/2.16 kg |
| Tensile strength at yield | ASTM D638-22 | 25–28 MPa |
| Elongation at break | ASTM D638-22 | >350% |
| Flexural modulus | ASTM D790-17 | 800–900 MPa |
| Vicat softening temperature | ASTM D1525-17e1 | 122–127°C |
| ESCR | ASTM D1693-15 Method B, 100% Igepal, 50°C | >250 h |
| Notched Izod impact | ASTM D256-23 | 8–12 kJ/m² |
The manufacturer-issued certificate of analysis is the controlling document for lot-level acceptance. The table represents typical industrial ranges, not specification limits, and test values must be confirmed against the current Braskem product datasheet for HDPE 0144.
On continuous-extrusion blow molding lines equipped with 24:1 L/D single-screw extruders, HDPE 0144 is processed with barrel zones from 170°C to 210°C, a die head temperature of 180–210°C, and blow air pressure of 0.6–0.8 MPa. Melt temperatures above 230°C can generate odor and degrade stabilizer packages, while temperatures below 170°C raise head pressure and diminish parison surface quality. The grade’s high melt viscosity supports parison hang time and diameter control for containers up to 30 L, but cycle time is determined primarily by mold cooling capacity and wall thickness. On rotary blow molders, flash removal and pinch-off trimming require cooled trim knives to avoid smearing; coolant temperature is typically maintained at 8–12°C. Head tooling with converging die entries and chrome-plated flow surfaces is specified to minimize melt fracture at the low processing shear rates associated with high-molecular-weight HDPE. Single-screw extruders with a barrier screw and a Maddock mixing section are preferred. At screw speeds of 30–60 min⁻¹, specific energy input ranges from 0.25–0.35 kWh/kg, and head pressure is typically maintained below 35 MPa to avoid excessive shear heating. The feed throat is reverse-cooled with a water jacket set at 15–25°C to prevent premature pellet bridging.
Substitution of HDPE 0144 for a 0.958 g/cm³ grade lowers container top-load stiffness by approximately the difference in flexural modulus, which is typically 800–900 MPa for HDPE 0144 versus 1000–1200 MPa for higher-density blow-molding HDPE. The loss in stiffness can be offset by increasing wall thickness at the neck and base, but specific thickness increments must be validated by ASTM D2659-22 top-load testing or equivalent container compression testing. Conversely, environmental stress-cracking resistance improves markedly; grades with higher density and lower molecular weight typically show ESCR values below 100 h in ASTM D1693-15 Method B, while HDPE 0144 exceeds 250 h. This trade-off is most relevant in agrochemical and detergent containers where capping torque, stacking loads, and chemical exposure act simultaneously.
For containers requiring outdoor exposure, HDPE 0144 in natural form has limited weathering resistance. A carbon black concentrate at 2–3 wt% or a hindered-amine light stabilizer package is added during extrusion, and the concentrate must be metered with a separate gravimetric feeder to avoid lot-to-lot drift. The addition of regrind is limited to 20 wt% in stress-cracking-critical applications; higher regrind fractions lower ESCR and increase variability of melt mass-flow rate. The product is also not recommended for applications requiring continuous service above 60°C under sustained mechanical load, because polyethylene creep and creep rupture behavior require validation under ISO 22088-1:2006.
Compared with Braskem HDPE grades intended for injection molding, HDPE 0144 has a melt mass-flow rate that is one to two orders of magnitude lower, which eliminates its use in thin-wall injection molding tools with flow-path ratios above 200:1. The product is also distinguished from HDPE grades designed for blown film by its higher molecular weight and lower melt flow, which provide melt strength but limit throughput on film lines. Among blow-molding HDPE grades, HDPE 0144 is positioned toward lower density and lower melt flow, giving priority to chemical resistance and ESCR over modulus and cycle time. This positioning is relevant in multi-layer structures where HDPE 0144 is used as the core or inner layer in contact with aggressive fluids, while a higher-density HDPE outer layer supplies stiffness. Layer-to-layer adhesion in such coextruded structures must be verified with peel testing according to ASTM F88/F88M-21 or equivalent, because viscosity mismatch can generate interfacial instability if the outer layer has a significantly higher melt flow rate.
Die swell for HDPE 0144 is higher than for lower-molecular-weight HDPE grades because of long relaxation times. Operators typically adjust the die gap to compensate for swell of 30–50% in diameter. Parison programming with a tapered core is used to maintain wall thickness in the pinch-off and shoulder regions. On accumulator-head machines with shot capacities up to 3 kg, parison drop times beyond 2.5 s produce sag that creates thin sidewalls; therefore head tooling is sized to deliver shot in 1–2 s. Parison weight variation should be monitored with a weigh-scale interface, and variation above ±0.5% of target shot weight triggers adjustment of melt temperature or diverter-valve timing. Wall-thickness distribution is verified by sectioning containers at the neck, sidewall, and pinch-off using a Hall-effect thickness gauge or equivalent ultrasonic method, with minimum wall thickness values compared against design specifications derived from UN 31H1 or similar dangerous-goods packaging requirements where applicable.
Incoming resin screening for HDPE 0144 should include density and melt mass-flow rate checks, but processors also evaluate gel contamination by blowing a film sample and counting visible gels. Gel counts above 50 particles/m² at sizes above 0.1 mm can produce pinhole defects in thin-walled containers. Metal detection and magnetic separation are recommended upstream of the extruder feed throat to protect the screw and head tooling from tramp metal. Contamination with polypropylene, nylon, or acetal regrind must be prevented because incompatible polymer domains nucleate delamination and weak weld lines. For multi-cavity continuous blow molding, cavity-to-cavity variation in wall thickness often reflects uneven melt distribution in the die head; this is corrected by balancing die lands and maintaining uniform heater-band output within ±2°C. Incoming moisture is normally not a process constraint, but condensation formed on cold pellets transferred to a warm shop floor can produce surface defects in the parison. Pellets should be allowed to equilibrate for 4–8 h before processing when temperature differential exceeds 10°C.
| Regulatory reference | Scope | Verification requirement |
|---|---|---|
| Regulation (EC) No 1907/2006 | REACH SVHC declaration | Confirm current supplier statement for article-level obligations |
| FDA 21 CFR 177.1520 | Food-contact suitability, if required | Verify current grade-specific compliance letter |
| Regulation (EU) No 10/2011 | EU plastic food-contact migration | Confirm specific migration limits for intended food simulant |
| Directive 2011/65/EU | RoHS restricted substances | Not applicable to unreinforced polyethylene base resin, but confirm with supplier statement |
The matrix is a verification checklist, not a certification statement. Lot-specific regulatory status is obtained from the manufacturer’s current product stewardship summary.
Storage of HDPE 0144 should maintain pellet temperature below 50°C and relative humidity below 60% to prevent oxidative degradation and surface condensation. Bags or bulk containers should be kept away from direct sunlight and oxidizing agents. The product does not require pre-drying under normal dry-air handling conditions, but condensation formed during rapid temperature change can produce surface defects in the parison. High ambient temperatures in silos can raise pellet surface temperature and reduce hopper flow; silo internal temperatures above 45°C should trigger nitrogen blanketing or transfer to indoor storage. Processors should also record lot number, melt mass-flow rate, and density for each incoming batch to maintain traceability in container qualification records. For continuous extrusion lines, batch-to-batch changes are commonly detected by a shift in head pressure of 0.5–1.0 MPa at constant screw speed; such shifts are corrected by adjusting barrel temperature profile within the limits already described. No separate drying hopper is required, but desiccant drying is used only if the resin has been exposed to condensation or contaminated with surface water, with inlet air dew point below -20°C and residence time of 1–2 h at 70–80°C.
