| HS Code | 803132 |
| Density | 0.952 g/cm³ |
| Specific Gravity | 0.952 |
| Melt Index | 0.35 g/10 min (190°C/2.16 kg) |
| Tensile Strength At Yield | 24.0 MPa |
| Elongation At Break | 600% |
| Flexural Modulus | 1.10 GPa |
| Vicat Softening Point | 126°C |
| Brittleness Temperature | -70°C |
| Deflection Temperature At 0 46 Mpa | 70°C |
| Hardness Shore D | 65 |
| Environmental Stress Crack Resistance | >1000 h |
| Coefficient Of Linear Thermal Expansion | 1.2E-4 /°C |
| Water Absorption | <0.01% |
| Thermal Conductivity | 0.35 W/m·K |
| Dielectric Constant | 2.3 |
| Volume Resistivity | >1E15 ohm·cm |
As an accredited Bamberger Polymers HDPE 3272 factory, we enforce strict quality protocols—every batch undergoes rigorous testing to ensure consistent efficacy and safety standards.
| Packing | Bamberger Polymers HDPE 3272 is supplied in 25 kg (55 lb) multiwall bags, palletized for convenient handling and bulk shipment. |
| Container Loading (20′ FCL) | Container loading (20′ FCL): Bamberger Polymers HDPE 3272 in palletized 25 kg bags, shrink-wrapped, strapped, and secured for ocean transport. |
| Shipping | Bamberger Polymers HDPE 3272 is a non-hazardous polyethylene resin and is not regulated for transport by DOT, IMDG, or IATA. Typical shipments use 25 kg bags or 1,000 kg bulk bags, stacked and stretch-wrapped on pallets, or bulk trucks/railcars. Keep dry, avoid heat and UV exposure. No special placarding required. |
| Storage | Store Bamberger Polymers HDPE 3272 in a cool, dry, well-ventilated area away from direct sunlight, heat, sparks, and oxidizing agents. Keep original containers or bags closed to prevent moisture, dust, and contamination. Use first-in, first-out stock rotation. Avoid prolonged UV exposure and physical damage. Maintain clean, dry floors; do not stack excessively. Store in accordance with local regulations and manufacturer guidance. |
| Shelf Life | For Bamberger Polymers HDPE 3272: stable under normal storage; no specific shelf life. Keep cool, dry, sealed, away from sunlight. |
In 20–60 L tight-head and open-head jerrican production on single-station shuttle blow-moulding cells with 70–90 mm grooved-barrel extruders, HDPE 3272 is run as the primary olefin matrix at 100 parts by weight. The formulation standard for UN-rated liquid chemical packaging typically adds 2.0–3.5 wt% carbon black or UV-stabilizer masterbatch to satisfy outdoor storage under ISO 4892-2 exposure protocols, and 0.2–0.5 wt% phenolic/phosphite antioxidant masterbatch to protect melt stability during reciprocating-screw plastication. Processing data from accumulator-head machines with L/D 30:1–36:1 indicate stable parison formation at melt temperature 185–205°C, die temperature 190–200°C, and blow pressure 6–8 bar. The high-molecular-weight architecture of 3272 resists parison draw-down in tools requiring shot weights up to 6 kg, but molders must limit melt residence above 210°C to less than 10 min to avoid oxidative gel formation. Compliance with UN Model Regulations Chapter 6.1 and 49 CFR §178.504 requires leakproofness testing after drop and stack-load protocols. Terminal products include UN-marked 3H1 and 3H2 jerricans for solvents, acid precursors, and printing-ink intermediates, with wall-thickness distribution at chine and handle pinch-off points verified by ultrasonic gauge. Pre-drying is generally unnecessary for sealed original packaging, but surface condensation at relative humidity above 70% can introduce parison pitting and requires hopper air circulation at 60–70°C for 2 h.
Automotive fuel tank production on multi-layer extrusion blow-moulding lines running 40–80 L shells uses HDPE 3272 as the ethylene-based outside and inside layers, with an integral EVOH barrier layer inserted between adhesive layers. Published data for this specific six-layer configuration is limited; tank qualification must include permeation testing to SAE J2665 and subzero impact verification, not relying solely on resin datasheet values. The formulation ratio for the HDPE 3272 layer is 100 parts resin, with 2.0–3.0 wt% carbon black masterbatch for UV opacity, 0.2–0.6 wt% antioxidant masterbatch, and, when melt roughness appears at high die shear, 0.1–0.3 wt% external lubricant. The process is executed on six-layer coextrusion blow-moulding machines with 70–90 mm extruder diameters, L/D 30:1–36:1, melt temperature 180–200°C, and blow pressure 6–8 bar. Barrier performance is sometimes enhanced by inline fluorination at 0.5–1.5 vol% fluorine in nitrogen after moulding, but excessive fluorine above 1.0 vol% can embrittle the inner surface and reduce weld-seam elongation. Low-temperature mechanical response is evaluated by ISO 179-1:2010 Charpy notched impact at −40°C and by ASTM D256 Izod impact. Emission-control compliance for the finished tank derives from ECE R34, CARB LEV III evaporative emission limits, and US EPA 40 CFR Part 86. Terminal products include passenger-vehicle and off-road fuel tanks for gasoline and ethanol-blended fuel systems, with wall thickness ranging from 2.5 mm to 5.0 mm depending on tool geometry.
Agricultural chemical blow-moulding cells producing 1–10 L F-style jugs use HDPE 3272 where high environmental stress crack resistance under ester solvent and emulsifiable concentrate exposure is specified. The compound is set at 100 parts HDPE 3272 with 2.5–4.0 wt% carbon black or green pigment masterbatch containing hindered amine light stabilizer, and 0.2–0.5 wt% process-stabilizer masterbatch. Extrusion blow moulding on reciprocating-screw machines with 50–70 mm screws, L/D 24:1–30:1, uses melt temperature 178–198°C, die gap 2.0–3.5 mm, and parison programming for round-to-rectangular tool transitions. The finished containers are UN-marked 3H1 packagings certified under UN Model Regulations Chapter 6.1, and the wall sections are checked for stress cracking by ASTM D1693 Condition B. Labelling for filled product conforms to EPA FIFRA 40 CFR Part 156, but the resin itself is not the regulated article until filled. The container is rated for solvents and pesticide emulsifiable concentrates at specific gravity up to 1.4, but not for continuous contact with strong oxidizing agents or methylene chloride. Blow-pin temperature is maintained at 15–25°C to prevent inner-surface melt fracture at handle pinch-off. Terminal products include 1 L, 5 L, and 10 L agrochemical jugs with tamper-evident neck finishes. Pre-drying is not normally required, but opened gaylords stored at RH above 70% should be purged with dry air for 1–2 h before vacuum loading to minimize surface moisture-induced splay.
Large-capacity open-head 220 L drums are converted from HDPE 3272 on accumulator-head extrusion blow-moulding machines with 110–150 mm screw diameters and L/D 30:1. The compound consists of 100 parts HDPE 3272, 1.5–3.0 wt% carbon black masterbatch, 0.2–0.4 wt% antioxidant masterbatch, and 0.05–0.15 wt% fluoropolymer processing aid to control melt fracture at high screw output. Melt temperature at the die is held at 180–200°C, with shot weight up to 11 kg and blow pressure 5–7 bar. Mold cooling water at 10–16°C is required for cycle times below 180 s. Parison programming is employed with wall-thickness profile from 4 mm at the top to 6 mm at the bottom to meet drop-test integrity. Top-load and stacking performance is assessed according to ASTM D4577. Compliance is maintained under UN Model Regulations Chapter 6.1 for 1H2 open-head plastic drums, 49 CFR §178.504, and IMDG Code Part 4 for ocean freight. Do not run melt temperature above 220°C because long parison hold times in the accumulator cause gel specks and loss of environmental stress crack resistance; flush barrels with HDPE purge resin before shutdown. Terminal products include 120 L and 220 L open-head drums for liquid dyes, metalworking fluids, and water-based polymer dispersions.
When sheet gauge from 2 mm to 10 mm is required for secondary containment basins and spill trays, HDPE 3272 demonstrates sufficient melt strength on single-screw flat-die sheet lines without edge curl. The formulation uses 100 parts HDPE 3272, 1.0–2.5 wt% UV-stabilizer masterbatch, 0.2–0.5 wt% antioxidant, and, if non-black color is specified, 2.0–3.0 wt% inorganic pigment masterbatch. Extrusion temperature profile is 175–205°C across barrel zones, die temperature 200–210°C, and polishing-roll stack temperature 70–85°C for low-gloss sheet surfaces. Thickness control by gravimetric feeding and melt pump maintains variation within ±0.05 mm. The formed parts are evaluated under ASTM D1693 Condition C for stress crack resistance and ISO 4892-2 for UV retention of tensile break. Compliance as secondary containment derives from EPA 40 CFR 264.175, which requires containment of containers and devices for liquid hazardous waste; the resin itself is not food-contact regulated unless specifically validated under 21 CFR 177.1520. Process limitations include avoiding chill-roll temperatures above 90°C, which cause blocking and inner stress. Terminal products include 2.0–8.0 mm thick thermoformed spill pallets, battery containment trays, and chemical storage sump liners.
At shot weights above 14 kg, parison sag is the controlling variable; intermediate bulk container inner bottles of 1,000 L are produced by extrusion blow moulding multi-layer structures where HDPE 3272 serves as the structural layer. The formulation ratio for the structural layer is 100 parts HDPE 3272, 2.0–3.0 wt% carbon black masterbatch for UV opacity, and 0.3–0.5 wt% antioxidant masterbatch. Machines are large-platen shuttle or continuous blow-moulding units with 120–150 mm extruders, L/D 30:1–36:1, and shot weights from 14 kg to 18 kg. The high-molecular-weight distribution of HDPE 3272 reduces parison sag at these shot weights, with die swell controlled by die land length 25–35 mm and diverging die angle. Melt temperature is limited to 185–205°C, and mold cooling water is maintained at 8–14°C. Compliance for IBC packaging follows UN Model Regulations Chapter 6.5 and 49 CFR §178.705 for intermediate bulk containers, with hydrostatic pressure testing and stacking load verification at design-type level. In multi-layer structures, the layer containing HDPE 3272 must not be foamed or blended with more than 5 wt% recycled LDPE if high top-load ESCR retention is specified; such blending lowers stress-crack resistance. Terminal products include 1,000 L IBC inner bottles for liquid specialty chemicals and aqueous emulsions.
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Bamberger Polymers HDPE 3272 is a high-molecular-weight high-density polyethylene copolymer intended for extrusion blow moulding of large-volume industrial packagings. The grade, marketed in some trade literature as Bapolene HDPE 3272, is supplied in pellet form and is characterized primarily through high-load melt flow testing because the conventional 2.16 kg melt index falls below the reliable measurement range for this molecular architecture. End-use applications include industrial drums, intermediate bulk container liners, automotive fuel tank shells, agricultural chemical containers, and large-part multilayer packaging requiring elevated environmental stress crack resistance. The product is differentiated from general-purpose HDPE injection moulding grades by its broader molecular weight distribution, higher melt strength, and controlled parison sag behaviour. Lot-specific certificates of analysis should govern processing decisions; the class-typical data presented in this document are drawn from publicly available technical literature for high-molecular-weight HDPE copolymers of this nominal density class, not from a single guaranteed specification sheet.
Rheological specification for HDPE 3272 is expressed through high-load melt flow rate according to ASTM D1238 or ISO 1133-1:2022 at 190 °C under 21.6 kg piston load. The class-typical high-load melt flow range for this grade is 7.0–8.5 g/10 min, while density falls within 0.953–0.957 g/cm³ when determined by ASTM D1505 or ISO 1183-1. This combination places the material in the high-molecular-weight HDPE bracket, where chain entanglement density and melt relaxation time are substantially higher than those of injection moulding HDPE grades exhibiting melt flow rates of 20–32 g/10 min at 2.16 kg.
In accumulator-head extrusion blow moulding, this rheological behaviour translates into improved parison hang time and reduced diameter swell variability across the shot. Because the 2.16 kg melt index is low and often below the reproducible sensitivity limit of the test method for this grade, high-load melt flow is the preferred release criterion for incoming resin inspection. A narrow high-load melt flow window is more relevant than a single melt index value because it correlates more directly with screw plastication rate, head pressure generation, and wall-thickness control on a profiled parison programmer.
Tensile properties determined by ASTM D638 or ISO 527-2 typically include a yield stress of 24–28 MPa and elongation at break above 600%. Flexural modulus values derived from ASTM D790 or ISO 178 generally fall between 1,000 MPa and 1,250 MPa. Notched Izod impact testing under ASTM D256 at 23 °C often reports values from 8 kJ/m² to 15 kJ/m², depending on specimen preparation and cooling rate. These mechanical properties make the grade suitable for parts that must survive low-temperature drop testing and hydrocarbon contact without brittle fracture.
Processing on production-scale accumulator-head machines should start with a barrel temperature profile of 180–210 °C from feed throat to metering section, with die head zones held at 190–215 °C. The temperature window is materially narrower than that of fractional-melt HDPE sheet grades because excessive heat input accelerates molecular weight degradation, while insufficient heat input produces unmelt and unstable parison formation. On grooved-barrel extruders with L/D ratios between 24:1 and 30:1, screw speed is typically limited by head pressure rather than drive torque. A screen pack of 20/40/60 mesh is commonly used to increase back pressure and improve melt homogeneity, but head pressure should be monitored against the machine manufacturer’s maximum allowable pressure.
Parison sag is the principal processing defect in this material class. If melt temperature exceeds 220 °C, parison length variation can exceed ±5% on a 10 L accumulator head, causing inconsistent pinch-off weld thickness and sidewall thinning. Conversely, at melt temperatures below 180 °C, the material may exhibit surface melt fracture at the die exit because the wall shear stress exceeds the critical threshold for the molecular weight distribution. This fracture appears as shark-skin texture on the parison surface and is not corrected by increasing die gap alone; melt temperature or die land geometry must be adjusted.
Pre-drying is generally not required when pellets are stored at relative humidity below 60%. At higher humidity or in cold-storage transitions, moisture condensate on pellet surfaces can introduce surface voids and gel-like visual defects. A desiccant or hot-air hopper dryer set at 80–90 °C for 2 hours is sufficient to remove surface moisture, but extended drying above 90 °C should be avoided because oxidative yellowing can occur in the feed throat. Purging of the blow moulding line should be performed with a high-density polyethylene purge compound of similar viscosity rather than polypropylene or universal purging resins that may leave incompatible residue.
Industrial container applications for HDPE 3272 depend on environmental stress crack resistance under aggressive liquid contact. The relevant test method for detergent and agrochemical packaging is ASTM D1693, commonly Condition B with 10% Igepal CO-630. Class-typical values for high-molecular-weight HDPE copolymers in this density range fall between 40 h and 100 h, but published data for this specific configuration is limited and should not be used as a guaranteed release limit. For automotive fuel tank shells, wall-thickness distribution and pinch-off weld integrity are more decisive than the unreinforced tensile properties. On accumulator-head machines producing 15–20 L industrial containers, continuous wall-thickness monitoring at the pinch-off line is necessary because the tail flash thickness is a direct indicator of parison programming accuracy and clamp force stability.
The comparative table below separates HDPE 3272 from conventional high-flow HDPE injection moulding grades and from fractional-melt HDPE used in sheet and geomembrane applications. The class-typical ranges shown are comparative reference data, not specification guarantees, and are based on standard test methods indicated in each row.
| Property | Test method | HDPE 3272 class-typical range | High-flow injection HDPE | Fractional-melt HDPE |
|---|---|---|---|---|
| Melt flow rate, 190 °C/21.6 kg | ASTM D1238 | 7.0–8.5 g/10 min | 30–60 g/10 min | 2–5 g/10 min |
| Density | ASTM D1505 | 0.953–0.957 g/cm³ | 0.952–0.965 g/cm³ | 0.940–0.950 g/cm³ |
| Tensile yield strength | ASTM D638 | 24–28 MPa | 22–30 MPa | 20–25 MPa |
| Flexural modulus | ASTM D790 | 1,000–1,250 MPa | 950–1,300 MPa | 800–1,000 MPa |
| Notched Izod impact, 23 °C | ASTM D256 | 8–15 kJ/m² | 4–8 kJ/m² | 12–20 kJ/m² |
| ESCR, Condition B, 10% Igepal | ASTM D1693 | 40–100 h | 5–20 h | 100–300 h |
The difference in processing behaviour is more significant than the difference in mechanical properties. High-flow injection HDPE grades are optimized for rapid cavity filling and short cooling cycles, but their low melt strength produces unacceptable parison drawdown in blow moulding. Fractional-melt HDPE grades provide high melt strength and excellent stress crack resistance, but their higher viscosity can reduce extruder throughput and increase die pressure beyond the safe operating range of smaller accumulator heads. HDPE 3272 occupies an intermediate position: its high-load melt flow is high enough for practical output on medium-to-large blow moulding lines, while its molecular weight distribution remains broad enough to resist sag and maintain pinch-off weld integrity.
For continuous extrusion blow moulding of bottles, HDPE 3272 is less suitable than lower-viscosity bottle-grade HDPE because the higher viscosity reduces parison length control at high cycling rates. For large-part accumulator blow moulding, however, this viscosity is an operational advantage. On machines with clamp force above 1,000 kN, the grade can be processed with parison programmers tuned to a 20–30% die gap reduction at the top of the parison and a 10–15% reduction at the bottom, but these percentages are tool-specific and should be validated on the production tooling.
UN-rated industrial packaging suitability depends on the container design, drop height, fill temperature, and stack load, not solely on the base resin. HDPE 3272 can be evaluated for UN 1H1 open-head drums and UN 1H2 tight-head drums when the converter’s wall-thickness distribution and weld-line integrity meet the requirements of the relevant dangerous goods transport tests. Typical qualification includes drop testing, hydraulic pressure testing, and stack load testing according to the UN Model Regulations, but the resin data alone do not guarantee certification. The grade’s high environmental stress crack resistance and low-temperature impact behaviour are favourable for hydrocarbon-containing liquid transport, but the final certification is part of the moulded container qualification, not a property of the pellet.
For food-contact evaluations, converters should verify the specific lot against FDA 21 CFR 177.1520 for olefin polymers and the applicable European Union food-contact framework, including overall migration testing under EU Regulation 10/2011. HDPE 3272 is typically formulated without intentionally added heavy metals, and the base polyolefin can be checked against REACH candidate list restrictions and RoHS directive substances. The actual compliance status must be confirmed from the supplier’s regulatory statement for the specific production site and lot, because additives and colour concentrates can alter migration and extractable profiles.
A documented operational boundary is additive compatibility. The grade should not be combined with certain amine-based additive masterbatches or high-pH colour concentrates without pre-testing, because amine migration can neutralize acid scavenger systems and reduce long-term melt stability during reprocessing. Similarly, highly filled masterbatches above 20 wt% inorganic loading can reduce notched impact resistance and should be evaluated through drop testing rather than assumed acceptable from melt flow data alone. Published data for this specific configuration is limited for those additive combinations, so compatibility testing is required before production-scale runs.
