| HS Code | 190425 |
| Density | 0.954 g/cm³ |
| Melt Flow Rate | 0.20 g/10 min (190°C/2.16 kg) |
| Melt Flow Ratio | 100 |
| Melting Point | 131°C |
| Vicat Softening Point | 126°C |
| Tensile Strength At Yield | 26 MPa |
| Tensile Strength At Break | 33 MPa |
| Elongation At Break | >600% |
| Flexural Modulus | 1200 MPa |
| Izod Impact Notched | 80 J/m |
| Hardness Shore D | 65 |
| Environmental Stress Crack Resistance | >1000 h |
| Brittleness Temperature | < -70°C |
| Thermal Conductivity | 0.45 W/m·K |
| Coefficient Of Linear Thermal Expansion | 1.2E-4 1/°C |
| Specific Heat Capacity | 1.90 J/g·°C |
| Water Absorption | <0.01% |
| Dielectric Strength | 20 kV/mm |
| Volume Resistivity | >1E16 ohm·cm |
| Dielectric Constant | 2.3 |
As an accredited Braskem HDPE 002G factory, we enforce strict quality protocols—every batch undergoes rigorous testing to ensure consistent efficacy and safety standards.
| Packing | Braskem HDPE 002G comes in 25 kg polyethylene bags, palletized and securely wrapped for industrial shipping and storage. |
| Container Loading (20′ FCL) | Braskem HDPE 002G packed in 25 kg bags on pallets, loaded into a 20-foot FCL container, secured for maritime transport. |
| Shipping | Braskem HDPE 002G is shipped as non-hazardous polyethylene resin pellets in 25 kg bags, jumbo bags, or bulk trucks/railcars. Keep dry, clean, and away from direct sunlight, heat, and contaminants. Use covered transport; no special hazard classification required. |
| Storage | Store Braskem HDPE 002G in a cool, dry, well-ventilated warehouse away from direct sunlight, heat, flames, and strong oxidizers. Keep original containers closed, clean, and palletized to prevent moisture, dust, and contamination. Avoid prolonged UV exposure and excessive stacking. Maintain good housekeeping and follow local regulations and the supplier’s safety data sheet. Do not store near food, drink, or incompatible materials. |
| Shelf Life | Shelf life is typically 24 months from production when stored in original packaging, dry, ventilated, away from sunlight and heat. |
Dairy and juice bottle tooling on whale-tail continuous shuttle machines imposes a narrow processing window because the parison must remain open during multi-cavity indexing without weld-line disturbance. Braskem HDPE 002G is processed as a monolayer at a melt temperature of 180°C–210°C, with die temperatures held 5°C–10°C below the upper melt limit to suppress die lip oxidation. The grade is specified with a nominal melt flow rate of 0.22 g/10 min at 190°C/2.16 kg and a density of 0.955 g/cm³ when measured in accordance with ISO 1133-1:2022 and ISO 1183-1:2019. Extrusion output is set between 20–40 kg/h per head on a six-station shuttle wheel, with a die gap of 1.0–1.8 mm and blow pressure of 0.5–0.7 MPa. Cycle time for 1-L bottles typically ranges from 8–12 s per cavity set, depending on cooling-water temperature and blast air volume.
White masterbatch based on titanium dioxide at 60–70% pigment loading is introduced at 2–4 wt% to provide light opacity in milk and juice containers. The masterbatch carrier must be HDPE-compatible; an LLDPE-rich carrier above 8 wt% of the formulation can reduce melt strength and cause parison length variation on high-output shuttle wheels. Pre-drying is not required for the base resin unless pellet surface condensation has formed after outdoor storage below dew point, in which case a hopper dryer at 70°C for 2 h is applied before extrusion.
Food-contact compliance for the monolayer bottle is assessed under 21 CFR 177.1520 for olefin polymers and EU No 10/2011 for plastic materials intended for food contact. The overall migration limit of 10 mg/dm² applies to the filled bottle under the intended time and temperature conditions, and the bottle converter is responsible for confirming that the selected titanium dioxide masterbatch and any processing aid lie on the union list or have a specific migration limit verified in the finished article.
Column crush retention is measured after 48 h at 23°C using ASTM D2659-16; 1-L dairy bottles are commonly qualified to a top-load specification of at least 350 N at 23°C after filling. The grade is not recommended for hot-fill above 60°C because top-load retention drops sharply without vacuum panel geometry.
| Monolayer Dairy/Juice Bottle Requirement | Standard or Method | Condition | Control Range |
|---|---|---|---|
| Direct food contact polymer compliance | 21 CFR 177.1520 | Room temperature cold-fill | No unlisted recycled content in contact layer |
| EU overall migration | EU No 10/2011 | 10 mg/dm² | Food-grade masterbatch only |
| Column crush | ASTM D2659-16 | 23°C, 48 h | ≥ 350 N for 1-L |
In 200-L L-ring drum production, wall-thickness scatter originates primarily from corner thinning at the chime radius and from parison deformation during mold close. On accumulator-head machines with a shot size of 6.5–9.0 kg, 002G is extruded at 200°C–220°C through a die diameter of 350–450 mm. The accumulator ram speed is held at 100–180 mm/s to avoid melt fracture; die gap programming is set with 8–12 point radial control, and the gap is sequenced from 2.5 mm at the bottom pinch-off to 6.0 mm at the chime section. Mold clamp force of 2,000–3,000 kN is required to compress flash and maintain sidewall thickness. Cycle time for a 200-L drum ranges from 150–240 s depending on internal cooling time and ambient plant temperature.
Thickness measurements on the drum are taken with a Hall-effect thickness gauge at the sidewall, chime, and handling recess. A nominal sidewall thickness of 2.5–3.5 mm is used for standard chemical drums, while the region adjacent to the L-ring must remain above 1.8 mm after trimming to avoid drop-test failure. The L-ring geometry requires a delayed parison programming step at the lower chime because the parison must fill the ring cavity before the mold fully closes.
UN closed-head drums of type 1H2 are qualification-tested by drop at 1.2 m at -18°C for Packing Group II liquids up to specific gravity 1.2, leakproofness at 30 kPa for 30 min, and stack compression equivalent to 3.0 m of filled packages at 40°C for 28 days. The finished drum is used for lubricants, liquid food additives, industrial cleaners, and agricultural intermediates where a single-trip or limited-service packaging life is specified.
For UN-certified jerry can tooling in the 20-L to 30-L monolayer range, the stress state differs from drum sidewalls because integrated handles create flow stagnation and weld lines in the flash trim zone. The accumulator-head shot size for this package range is 1.2–2.5 kg, with die gap programming over 4–6 points and mold clamp force between 800–1,200 kN. Flash compression at the handle bridge is maintained at 0.3–0.6 mm to produce a weld line that withstands drop impact without blistering. The material is processed at 185°C–205°C to reduce parison sag in the handle zone while retaining sufficient melt strength for deep handle pinch-off. For outdoor-stored agrochemical and lubricant packs, the formulation includes a carbon black masterbatch at 2.0–2.5 wt% and a hindered amine light stabilizer at 0.1–0.2 wt%. Carbon black dispersion must be assessed by ISO 18553 or equivalent film rating because undispersed agglomerates act as stress concentration sites during -18°C drop testing. The end packages are diesel exhaust fluid jugs, light lubricant containers, agricultural chemical packs, and industrial solvent jerry cans requiring UN marking 3H1 for plastic jerricans.
| UN Plastic Jerrican Requirement | Standard or Reference | Test Condition | Pass Criterion |
|---|---|---|---|
| Drop impact | UN Model Regulations 6.1.5.3 | 1.2 m, -18°C, Packing Group II | No leakage or rupture |
| Leakproofness | UN Model Regulations 6.1.5.4 | 30 kPa for 30 min | No leakage |
| Hydraulic pressure | UN Model Regulations 6.1.5.5 | 100 kPa for 30 min | No leakage |
| Stack load | UN Model Regulations 6.1.5.6 | 3.0 m equivalent, 40°C, 28 days | No permanent deformation affecting package integrity |
When target parison length exceeds 1.2 m for large technical hollow parts, parison sag before mold close becomes the governing process constraint. For 002G, the melt temperature is shifted to 185°C–195°C rather than the upper blow molding range because the high molecular weight fraction contributes melt strength but also increases first normal stress difference at low shear. Extrusion through an accumulator die with a land length of 12–16 mm and a die gap of 2.0–3.5 mm produces die swell in the range of 30–50%; the resulting parison diameter must be matched to mold width to avoid pre-blow instability. Blow pressure of 0.4–0.6 MPa with a delayed pre-blow sequence is used to keep the parison open while mold halves close.
Online parison diameter monitoring with laser profilometry is recommended because published data for parison sag velocity at this exact melt index and extrusion rate is limited. A sag limit of 15% of initial parison length before mold close is used as an internal validation threshold on machines producing industrial water treatment vessels, material handling bins, and outdoor equipment housings. If the die temperature exceeds 210°C, sag rate increases non-linearly and wall taper becomes difficult to compensate with die gap programming alone.
The grade is not intended for thin-wall technical parts with nominal wall thickness below 1.0 mm; die swell and the frost line position produced by this molecular weight distribution create instability when the blow-up ratio exceeds 3.2:1. In such cases, a lower-molecular-weight blow molding grade or injection blow molding tooling is required.
Qualification of personal care and household chemical bottles for aggressive surfactant systems requires stress-crack resistance under top load, cap torque, and intermittent elevated temperature storage. The use of 002G in this segment is supported by ESCR evaluation under ASTM D1693 in 10% Igepal CO-630 at 50°C, with an F50 value above 30 h used as a minimum qualification target. On single-station extrusion blow molding machines with 4–8 cavities, wall thickness is maintained between 0.7–1.2 mm; cycle time for 500-mL shampoo or dishwash bottles is 10–15 s per cycle. The mold is cooled with water at 10–20°C to control gloss and dimensional stability.
Formulation for household chemical contact limits slip-agent concentration because erucamide above 1,000 ppm can reduce environmental stress crack resistance in the presence of nonylphenol ethoxylates and quaternary ammonium compounds. A migrating silicone slip process aid at 0.1–0.3 wt% is preferred for cap-feeding lubricity. The end packages are shampoo bottles, body wash bottles, dishwashing liquid bottles, liquid laundry detergent packs, and diluted bleach bottles; compliance with EU 1223/2009 applies to cosmetic packaging safety assessment, while bleach and detergent packs require compatibility testing to ASTM D2565 for UV exposure only when stored outdoors.
Accumulator-head machines with 2.5-L to 10-L shot size are used for stackable HDPE containers where warehouse stacking or palletized freight demands high column crush resistance. In this application, mold close sequencing is set with a flash compression of 0.3–0.5 mm at the parting line because top-load failure often initiates at the off-center neck weld. Melt temperature is kept at 190°C–205°C; mold temperature is maintained between 10°C–25°C with chilled water or glycol, and post-cooling with 5°C–10°C air for 10–20 s reduces panel deformation. Column crush testing according to ASTM D2659-16 is conducted after 48 h at 23°C and after 24 h at 40°C to compare cold compression and creep sensitivity.
The design of stacking ribs must avoid sharp internal radii below 0.5 mm because the density of 0.955 g/cm³ raises flexural modulus but reduces low-temperature impact toughness relative to lower-density HDPE grades. The finished containers are 5-L to 10-L industrial jugs, water dispenser bottles, automotive fluid packs, and multi-level stackable containers for janitorial supply chains. If the container is intended for direct food contact, the same 21 CFR 177.1520 and EU No 10/2011 migration checks described for dairy bottles apply to the contact layer and closure assembly.
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Braskem HDPE 002G is a high-molecular-weight high-density polyethylene homopolymer supplied as natural pellets for extrusion blow molding of rigid hollow parts. It belongs to the fractional-melt HDPE class. Melt flow rate is 0.20 g/10 min at 190 °C under 5.0 kg load in ASTM D1238-20 / ISO 1133-1:2022, and density is 0.953 g/cm³ under ASTM D1505-18 / ISO 1183-1:2019. The low MFR is used as a process-control index; it does not fully define the molecular weight distribution. Typical tensile yield stress is 28 MPa under ASTM D638-14, elongation at break exceeds 600 %, and flexural modulus at 1 % secant is approximately 1000 MPa under ASTM D790-17. Vicat softening point is approximately 127 °C under ASTM D1525-17. These values are typical rather than guaranteed release specifications; current Braskem datasheets must be used for lot acceptance.
| Property | Test method | Typical value | Unit |
|---|---|---|---|
| Melt flow rate | ASTM D1238-20 | 0.20 | g/10 min |
| Density | ASTM D1505-18 | 0.953 | g/cm³ |
| Tensile stress at yield | ASTM D638-14 | 28 | MPa |
| Elongation at break | ASTM D638-14 | 600 | % |
| Flexural modulus, 1% secant | ASTM D790-17 | 1000 | MPa |
| Vicat softening point | ASTM D1525-17 | 127 | °C |
The functional consequence of a 0.20 g/10 min MFR is a high zero-shear viscosity. In extrusion blow molding, this viscosity retards parison sag between die exit and mold closing. On production accumulator-head machines with shot capacities from 2 kg to 10 kg and extruder L/D ratios from 24:1 to 30:1, fractional-melt HDPE grades of this type require melt temperatures of 190–210 °C at the die head. If the melt temperature is below 180 °C, unmelts and high head pressures typically appear; above 220 °C, oxidative gels and viscosity loss can occur. The die gap is commonly set between 2.0 mm and 4.0 mm, with blow-up ratios of 2.2:1 to 3.0:1 for cylindrical containers in the 5–60 L range.
Parison swell in such grades is typically 20–40 % over the annular gap at die wall shear rates of 100–500 s⁻¹, but the exact swell ratio for 002G should be measured on the target die because parison weight distribution controls pinch-off integrity. A swell ratio above 45 % may indicate too low a die temperature or excessive shear; below 20 % may indicate over-shear or resin degradation. The low MFR also raises torque demand relative to 0.35 g/10 min HDPE. On single-station shuttle blow molders with 60–100 t clamp force and 60–80 mm screw diameter, processors should anticipate higher screw torque and more backpressure during shot accumulation. The actual torque difference depends on screw design; grooved-feed extruders tend to develop melt pressure more rapidly than smooth-bore barrels. Published data for 002G torque curves is limited, and line-specific motor current should be recorded during first production trials. A conservative commissioning sequence begins at 10–15 % lower screw speed than a 0.35 g/10 min reference grade, then adjusts upward only after the melt temperature has stabilized.
In production-scale extrusion blow molding, barrel temperature profiles for single-station shuttle machines with 60–100 t clamp force and 60–80 mm extruders are typically set with a rear zone of 170 °C, center zones of 185 °C, front zones of 195 °C, and a die head of 200 °C. Exact profiles are tool-dependent. Die gaps of 2.0–4.0 mm and blow-up ratios of 2.2:1 to 3.0:1 are common for monolayer containers in the 5–60 L range. When 002G is run on continuous-extrusion blow molders with a total shot capacity below 1.5 kg, parison curl may appear if the die bushing and mandrel are not centered; the low melt flow requires careful thermal homogenization. Melt pressure at the die head is commonly maintained between 15 MPa and 30 MPa on accumulator-head machines. A sudden drop in melt pressure at constant throughput may indicate resin degradation or feed-bridge blocking, while a steady upward trend suggests screen pack fouling or insufficient barrel heating in the feed zone.
Two boundary defects limit the extrusion window for 002G. At the cold boundary, melt temperatures below 180 °C produce high die-head pressure and shark-skin surface defects. At the hot boundary, temperatures above 220 °C can consume the process stabilizer package and generate crosslinked gel particles that appear as fish eyes in the parison. The temperature difference between these boundaries is approximately 40 °C, which is wider than many PVC or polyamide processing windows but still requires disciplined thermal control on multi-zone die heads. For quality control, oxygen induction time under ASTM D3895-19 can be used to monitor incoming resin stabilizer adequacy; typical HDPE homopolymers of this type show OIT values above 20 min at 200 °C, but exact 002G values must be obtained from the supplier.
To characterize incoming lots beyond MFR, dynamic shear rheometry at 190 °C over 0.01–100 rad/s per ISO 6721-10 can provide crossover frequency and polydispersity indicators. The low MFR does not capture the entire molecular weight distribution; two resins with the same MFR may have different parison performance. A lot-to-lot MFR variation of more than ±0.03 g/10 min should trigger a process audit because die swell and sag will shift. In addition, the die-lip temperature should be kept within 10 °C of the melt temperature to prevent surface defects. If die-lip cooling is excessive, the outer skin of the parison freezes and develops circumferential ridges that can remain visible in the finished part and act as stress concentrations.
When 002G is substituted for a blow-molding HDPE with MFR in the 0.30–0.40 g/10 min range, the parison will sag less and swell more. The melt may not run at the same screw speed and die settings. In practice, the die gap should be opened by 0.5–1.0 mm to compensate for the higher swell, and the screw speed should be reduced by 10–15 % until melt pressure stabilizes. Mold cooling temperature may remain at 10–25 °C, but total cycle time may increase because the higher molecular weight reduces melt relaxation and may require longer blow air time. The substitution is most justified when the application requires improved environmental stress-crack resistance, higher pinch-off strength, or better sidewall uniformity at large blow-up ratios. It is less justified when the fastest possible cycle time is the dominant economic driver.
The primary differences from other HDPE grades are not limited to MFR. Compared with injection-molding HDPE grades with MFR values of 8–12 g/10 min, 002G is not suitable for thin-wall injection molding because of its low flow. In contrast, an injection-molding HDPE would fail in large-parison blow molding because of insufficient melt strength and severe sag. Within blow-molding HDPE grades, impact and ESCR depend on molecular weight and comonomer placement. The density of 0.953 g/cm³ with low MFR usually indicates an ethylene copolymer with a small amount of butene or hexene comonomer. The exact comonomer type is not disclosed in typical technical datasheets. This is a critical difference from HDPE film grades, which are often lower density and higher MFR. Publication data for direct comparison with sibling Braskem blow-molding grades is limited; processors should request current datasheets before selecting a substitute.
Typical applications are industrial containers for aggressive liquids, 20–60 L jerrycans, multilayer automotive fuel tanks as structural HDPE layers, and large technical hollow parts. In barrier containers, 002G may be used with EVOH or polyamide inner layers and a maleic anhydride grafted tie-layer. The processing temperatures of EVOH require lower head temperatures, so the actual melt temperature of 002G may need to be reduced to avoid degradation of the barrier resin. In such a multilayer structure, the high melt strength of 002G supports the co-extruded parison. Pinch-off quality is controlled by material viscosity and mold pinch-off insert geometry. With 002G, a blunt pinch-off land and high clamp force are required to achieve clean weld lines. Inadequate pinch-off force causes pinhole leaks at the bottom of containers. Weld-line performance in the pinch-off zone can be tested by drop impact or hydrostatic burst testing according to the container specification.
Before food-contact or outdoor use, obtain a current supplier compliance letter. In the United States, olefin polymers intended for food contact are covered by 21 CFR 177.1520; in the European Union, the finished article must meet the overall migration limits of Regulation (EU) No 10/2011. HDPE homopolymer is not a direct food-contact endorsement; end-use conditions such as temperature and food type determine compliance. The grade does not contain intentionally added bisphenol A or ortho-phthalate plasticizers. For outdoor service, neat 002G is not sufficient; a carbon black masterbatch at 2.0–2.5 % loading or a hindered amine light stabilizer package is required, with weathering performance verified under ISO 4892-2 or ASTM D2565. REACH Regulation (EC) No 1907/2006 and RoHS Directive 2011/65/EU are applicable to the finished article, not to the raw resin alone.
Regrind use in blow molding can be implemented at 20–30 % by weight in non-specified industrial containers. Each regrind generation reduces the ESCR and increases gel count; mechanical properties should be checked per ASTM D638-14 and ASTM D1238-20 after every 3 regrind loops. Contamination from barrier layers, labels, or inks will shift the MFR and can lower parison strength unpredictably. Do not blend polypropylene, polycarbonate, or polyethylene terephthalate into the HDPE recycle stream; these are incompatible in melt forming and create delamination or fisheye defects. For post-consumer or regrind sources, incoming density and MFR must be re-characterized per ASTM D1505-18 and ASTM D1238-20 before blending with virgin 002G.
