| HS Code | 523849 |
| Polymer Type | High Density Polyethylene (HDPE) |
| Density | 0.963 g/cm³ |
| Melt Flow Rate 190 C 2 16 Kg | 0.70 g/10 min |
| Escr 100 Igepal F50 | >1000 h |
| Tensile Strength At Yield | 28 MPa |
| Tensile Strength At Break | 32 MPa |
| Elongation At Yield | 9% |
| Elongation At Break | >600% |
| Flexural Modulus | 1300 MPa |
| Hardness Shore D | 66 |
| Vicat Softening Point | 128°C |
| Brittleness Temperature | < -70°C |
| Deflection Temperature At 0 45 Mpa | 75°C |
| Melting Temperature | 130°C |
| Thermal Expansion Coefficient | 1.2e-4 cm/cm/°C |
As an accredited Braskem HDPE HDB0763 factory, we enforce strict quality protocols—every batch undergoes rigorous testing to ensure consistent efficacy and safety standards.
| Packing | Braskem HDPE HDB0763 packaging: typically 25 kg polyethylene bags, securely palletized for bulk industrial shipping and storage. |
| Container Loading (20′ FCL) | A 20′ FCL container fully loaded with Braskem HDPE HDB0763, palletized in sealed bags, shrink-wrapped and secured for ocean freight. |
| Shipping | Braskem HDPE HDB0763 is a non-hazardous polyethylene resin in pellet form. It typically ships in 25 kg bags, 1000–1250 kg octabins, or bulk trucks/railcars, palletized and stretch-wrapped. Keep dry, covered, and away from heat, sunlight, and ignition sources; no special UN hazardous transport classification required. |
| Storage | Store Braskem HDPE HDB0763 indoors in a cool, dry, well-ventilated area, away from direct sunlight, heat, flames, and strong oxidizers. Keep original packaging sealed to prevent moisture, dust, and contamination. Avoid prolonged outdoor exposure and pallet stacking that deforms bags. Observe good housekeeping and prevent static buildup. No special temperature control is required under normal conditions. |
| Shelf Life | Braskem HDPE HDB0763 has a recommended shelf life of 24 months when stored dry, in original packaging, away from direct sunlight. |
Under UN packaging rules, tight-head 5–30 L HDPE jerricans molded from Braskem HDPE HDB0763 form the primary packaging route for liquid agrochemicals, cleaning intermediates, and light hydrocarbon emulsions. A continuous shuttle blow molding machine with a 2.0–3.5 kg accumulator head and a 24:1 L/D single-screw extruder is set to deliver melt at 190–205°C. Die head temperature is maintained 5–8°C above the front barrel zone to stabilize parison swell. Parison programming uses 64-point wall thickness control to move material from the chime and shoulder into the sidewall pinch zone. Average sidewall thickness is 1.2–2.2 mm; pinch-off zone minimum thickness is specified at not less than 0.4 mm after welding. Blow air pressure is 0.7–0.9 MPa with a pre-blow delay of 0.5–1.2 s. Mold temperature is kept at 8–18°C using closed-loop chilled water. Pre-drying is not required at ambient relative humidity below 80%; surface condensation above that threshold produces splay and pinholes at the die lip. Drop testing follows UN Model Regulations chapter 6.1.5.3: filled containers conditioned at −18°C for 24 h are dropped from 1.2 m onto a concrete impact pad. Supplier certificate checks include density at 0.950 g/cm³ per ISO 1183-1:2019 and melt flow rate in the range 6–8 g/10 min at 190°C/21.6 kg per ISO 1133-1:2022. Environmental stress crack resistance is tested by ASTM D1693-B in 10% Igepal CO-630 at 50°C; lots below 200 h F50 are segregated from aggressive ethoxylated surfactant formulations. The same molds are used for hydrocarbon and oxidizer fills only after lot verification because pinched seam geometry changes when melt temperature drifts above 205°C.
| Verification item | Standard or method | Control window |
|---|---|---|
| Density | ISO 1183-1:2019 | 0.949–0.955 g/cm³ |
| Melt flow rate | ISO 1133-1:2022, 190°C/21.6 kg | 6–8 g/10 min |
| ESCR F50 | ASTM D1693-B | ≥200 h |
| Pinch-off minimum wall | Ultrasonic thickness gauge | ≥0.4 mm |
| Drop test at −18°C | UN 6.1.5.3 | 1.2 m, no leakage |
Coextrusion blow molding of 40–70 L agricultural diesel tanks uses HDB0763 in the outer and inner HDPE layers, a 2.0–3.5 wt% EVOH barrier core, and maleated LLDPE tie layers. Separate extruders deliver the materials to a five-layer accumulator head. Outer and inner HDPE melt temperatures are held at 200–215°C; EVOH is held at 205–215°C. Temperature differential between HDB0763 and EVOH exceeding 15°C causes interfacial flow instability, visible as layer melt fracture along the pinch-off band. The parison programming sequence must preserve a final wall thickness of 4.5–7.5 mm in flat sidewalls. Minimum thickness at the corner radius is maintained above 3.0 mm. Blow pressure is 0.7–1.0 MPa. Mold closing speed is 0.25–0.45 m/s. Fuel permeation is evaluated per SAE J2659 at 40°C; typical hydrocarbon emission for a 50 L tank with 12 vol% ethanol diesel blend is below 10 mg/m²/day after 60 days conditioning. Cold impact at −40°C is tested by ISO 6603-2; puncture energy is specified at not less than 15 J. Published data for this specific coextruded configuration is limited because layer distribution shifts with accumulator shot depletion and ambient humidity. Shops record tank weight, pinch-off thickness, and layer ratio for each lot before assembly.
For 0.5–2.0 L HDPE bottles containing xylene, methyl ethyl ketone, or chlorinated solvent blends, in-line fluorination during the blow cycle is used to reduce permeation. The blow gas is replaced by a 0.1–1.0% F2/N2 mixture for 3–10 s before the normal cooling air is introduced. The reaction creates a surface fluorinated zone 0.01–0.05 mm deep. Solvent retention is measured by gravimetric determination in sealed permeation cells at 40°C for 28 days. Unfluorinated HDB0763 bottles show xylene weight loss of 2.5–4.0% per month; fluorinated bottles retain greater than 99.0% of fill mass over 28 days. Molding parameters are adjusted to avoid fluorine contact before the parison reaches full inflation because premature fluorination causes local gel specks at the pinch line. Vent stream scrubbing uses 5% K2CO3 solution before discharge. Operators must verify residual fluorine below 1 ppm at the mold face. Process validation is performed on each blow station before commercial lots are released.
Continuous extrusion blow molding of 200-L tight-head drums from HDB0763 uses an accumulator head with 12–18 kg shot capacity and a 30:1 L/D grooved-feed extruder. Melt temperature in the front zone is set to 195–210°C. Parison length from die exit to mold bottom is 750–1000 mm. Sag control is critical: parison weight variation greater than 1.5% across a 20-shot run indicates melt temperature drift or screw wear. Wall thickness at the body is 2.5–4.0 mm; top and bottom chime zones are programmed to 4.5–6.0 mm. Pinch-off pressure is set to 120–180 kN across the parting line. Mold cooling water is 10–16°C, and total cycle is 80–120 s. Stacking three-high at 45°C requires top-load compression strength measured by ASTM D4577-19 at 2,000–2,400 kg for 48 h without deformation greater than 10 mm. Drop test under UN 6.1.5 for 200-L drums is from 1.2 m after −18°C conditioning. Failure mode in production is pinhole at the pinch seam if the tail pinch area is allowed to cool below 175°C before mold close. Some drum molders add 2–4 wt% recycled HDPE from in-house scrap; each addition changes parison die swell by 0.5–1.5 mm and must be re-confirmed in drop tests.
Braskem HDPE HDB0763 is supplied with food-contact documentation for olefin polymers under FDA 21 CFR 177.1520(c) 3.2 and EU Regulation 10/2011. Molders of 1–5 L food containers must limit melt temperature to 200–210°C to keep extractable degradation products below 10 mg/dm² in 10% ethanol simulant. ESCR testing in aqueous micellar fillings uses ASTM D1693-B with 10% Igepal CO-630 at 50°C; acceptable lots show F50 values above 150 h. Containers for citrus-based cleaning concentrates are excluded unless the specific formulation is tested because D-limonene and terpene-type solvents reduce HDPE ESCR sharply. The only process addition for food containers is verification of the food-contact declaration in the supplier lot certificate and monitoring organoleptic complaints from packers.
Across 250–1000 L industrial drainage sumps and vertical storage tanks, extrusion blow molding uses HDB0763 with a calcium carbonate-free formulation for black and grey containers. The same accumulator head equipment for 200-L drums is used for 500-L tanks, but the shot size is limited to 20 kg. Flow length from the die to the bottom mold edge exceeds 900 mm, causing parison temperature loss of 2–4°C/s at the lower edge. The die gap is opened 0.5–1.0 mm just before parison cut to compensate for thinning at the tank bottom. Wall thickness after molding is 3–6 mm. Internal hydrostatic pressure resistance is tested at 50°C for 28 days by filling to rated capacity; permanent deformation is limited to 2% of diameter. Top-load deformation after stacking two tanks is validated under ISO 12048. Published data for this specific configuration is limited; molders rely on shot-to-shot weight and wall thickness mapping rather than fixed process constants.
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Braskem HDPE HDB0763 is a high-density polyethylene extrusion blow-molding grade supplied in pellet form. The published typical density is 0.963 g/cm³ determined by ASTM D1505, and the published typical high-load melt index is 7.6 g/10 min at 190 °C/21.6 kg determined by ASTM D1238. These values place the resin in the higher-stiffness segment of the Braskem HDB blow-molding portfolio. The density is 0.005 g/cm³ above HDB0358 and 0.010 g/cm³ above HDB1053; the high-load melt index is 4.1 g/10 min above HDB0358 and 2.9 g/10 min below HDB1053.
Because the grade is formulated for blow molding, HDB0763 is not a direct substitute for injection-molding HDPE grades that typically exhibit melt flow rates of 10–30 g/10 min at 190 °C/2.16 kg. The higher molecular weight and elevated high-load melt index create high pressure drop in injection molds and would require wider gates, lower back pressure, and longer holding-pressure profiles. Conversely, replacing a blow-molding grade with an injection-molding HDPE in a parison extrusion line would produce severe parison sag, unstable neck calibration, and poor pinch-off weld integrity.
In processing, HDB0763 is run on single-screw extruders with 24:1 to 32:1 L/D ratios, using barrier screws and Maddock mixing sections. Melt temperature should be controlled between 180 °C and 220 °C, with setpoint variation held within ±5 °C. Mold temperatures between 10 °C and 25 °C and blow-air pressure between 0.6 MPa and 0.8 MPa are typical for this density class. The resin is not hygroscopic; pre-drying is not required when pellets are stored in sealed containers, but surface condensation on cold pellet surfaces should be prevented because it can appear as splay at the die exit.
At 7.6 g/10 min, HDB0763 exhibits lower zero-shear viscosity than HDB0358. The practical consequence is a higher parison sag rate under gravity. On continuous shuttle blow molders, this requires a narrower die gap and faster extrusion to maintain target wall distribution. Parison programmers should be configured to open the die gap during the later portion of the shot to compensate for axial thinning. On accumulator-head machines with shot sizes above 2 kg, the material may be less suitable than HDB0358 because the hang time exceeds its melt-strength limit and wall thinning at the upper neck becomes difficult to correct.
The higher density of 0.963 g/cm³ corresponds to a higher crystalline fraction than 0.958 g/cm³ or 0.953 g/cm³ grades. This increases thermal diffusivity and can shorten the cooling-limited portion of the cycle when the mold is held between 10 °C and 25 °C. However, a ±5 °C mold-temperature variation may create measurable wall-thickness and shrinkage variation; closed-loop mold cooling is recommended. Melt temperatures above 220 °C accelerate thermo-oxidative degradation and generate gels that appear as burnt specks in the parison and weak spots at the pinch-off, while temperatures below 180 °C raise head pressure and may cause sharkskin melt fracture at the die lip.
Capillary rheometry at 190 °C and shear rates between 100 s⁻¹ and 1,000 s⁻¹ should be used to determine the flow coefficient for die design. HDPE of this density class typically exhibits power-law shear thinning with an exponent below 1, so die head pressure does not scale linearly with extruder throughput. A single-point high-load melt index is insufficient for sizing spiral mandrels or accumulator die gaps. Die land lengths of 10:1 to 20:1 relative to die gap are typical for blow-molding tooling; shorter lands reduce residence time but produce less uniform die swell. Weld-line strength is governed by melt temperature at the meeting point and compression at the pinch-off; therefore, process temperatures should not be reduced below 180 °C in an attempt to increase parison stiffness.
Containers molded from HDB0763 are used for rigid detergent bottles, automotive lubricant containers, and industrial chemical packaging where stacking load and dimensional stability during filling are critical. These applications require environmental stress-cracking resistance; the relevant test is ASTM D1693 condition B. Because the 0.963 g/cm³ density target implies reduced comonomer content relative to lower-density HDPE grades, the F50 value is lower than that of HDB0358. Published data for this specific configuration is limited; therefore, converters should validate bottle-level ESCR under actual filling-line conditions rather than relying only on resin data sheet values.
Mechanical performance should be tested on the finished container. Drop-impact resistance is evaluated according to ASTM D2463-15, while column crush or top-load capacity is evaluated according to ASTM D2659 or ISO 12048. Notched Izod impact values obtained by ASTM D256 do not correlate reliably with blow-molded container impact performance and should not be used as the sole quality gate. Containers with handle pinch-offs, in-mold labels, or recycled-content layers require separate validation because weld-line orientation and contamination change the failure mechanism.
Values are published typicals from Braskem data sheets and are not sales specifications. The matrix isolates the material-positioning differences among adjacent HDB-series grades.
| Grade | High-load melt index, 190 °C/21.6 kg, ASTM D1238 | Nominal density, ASTM D1505 | Primary processing implication |
|---|---|---|---|
| HDB0358 | 3.5 g/10 min | 0.958 g/cm³ | Extended parison hang time, large-part ESCR |
| HDB0763 | 7.6 g/10 min | 0.963 g/cm³ | Stiffness-driven down-gauging, medium head tooling |
| HDB1053 | 10.5 g/10 min | 0.953 g/cm³ | Thin-wall flow, reduced parison melt strength |
The matrix shows that HDB0763 is not simply a higher-flow HDB0358; it also carries a higher density. The combination addresses stiffness-limited containers that do not require maximum ESCR. HDB1053 has a lower density but higher flow, making it suitable for thin-wall containers with short hang times. HDB0358 has lower flow and slightly lower density, giving longer parison hang time and higher ESCR. These trade-offs should be mapped to bottle performance requirements, not to resin name alone.
Substitution of HDB0763 for a 0.953 g/cm³ HDPE changes the buckling limit under axial compression. The critical buckling load of a cylindrical HDPE container scales approximately with the secant modulus and the square of wall thickness. If the secant modulus increases by 15% when moving from 0.953 g/cm³ to 0.963 g/cm³, equivalent top-load capacity can be maintained with a wall-thickness reduction of approximately 7%, assuming uniform wall distribution and no handle or weld-line limitations. This estimate is illustrative; published data for this specific configuration is limited, and physical testing according to ASTM D2659 or ISO 12048 is required before reducing wall thickness.
Down-gauging also affects drop-impact resistance and environmental stress-cracking performance. A wall-thickness reduction of 7% may reduce bottle-level impact energy approximately in proportion to wall thickness, so the finished container must be revalidated with ASTM D2463-15 at the lowest expected service temperature. In practice, down-gauging is most feasible for vertically loaded industrial containers with simple cylindrical geometry and no pinch-off handle. Containers with aggressive chemical fill or frequent drop exposure should retain a safety margin because ESCR and impact resistance decrease as wall thickness is reduced.
Food-contact status for HDB0763 depends on the additive package and the finished article construction. The resin is intended to permit compliance with FDA 21 CFR 177.1520(c) for olefin polymers, subject to condition-of-use limitations and end-test requirements. In the European Union, converters must verify compliance with Regulation (EU) No 10/2011 Annex I, including the overall migration limit of 10 mg/dm² for plastic materials and articles. REACH registration is addressed under Regulation (EC) No 1907/2006, and RoHS compliance for electrical and electronic equipment is addressed under Directive 2011/65/EU. The converter is responsible for confirming that concentrates, regrind, and processing aids do not violate the relevant specific migration limits or substance restrictions.
Reclaim management is an important operational boundary. A closed-loop regrind ratio of 20 wt% to 30 wt% is typical for extrusion blow molding; higher addition levels can reduce melt strength and drop-impact performance. The presence of polypropylene or PET flakes in post-industrial regrind creates incompatible laminar domains that become visible at the pinch-off and weld lines. Bottle-level drop testing per ASTM D2463-15 and visual inspection of weld lines should be used to qualify any reclaim ratio above 20 wt%. Flake moisture from wet grinding should be removed by drying at 65 °C for 2 h before reintroduction to the extruder throat.
On rotary wheel extrusion blow molding systems with 6 to 10 stations, HDB0763's higher flow lowers die manifold pressure but shortens the time available for blow-pin insertion and sealing. Mold open time should be minimized; at ambient temperatures above 30 °C, thin flash and handle pinch-offs may not hold form. Pinch-off lands should be maintained with an included angle of 30° to 45° and a flash pocket depth of 0.2 mm to 0.5 mm to promote complete welding. These tooling dimensions are not resin-specific but are critical when processing a 0.963 g/cm³ grade with reduced melt elongation at the tail end of the parison.
