| HS Code | 404181 |
| Melt Flow Rate 190 C 2 16 Kg | 0.35 g/10 min |
| Density | 0.953 g/cm³ |
| Tensile Strength At Yield | 25 MPa |
| Tensile Strength At Break | 30 MPa |
| Elongation At Break | >600% |
| Flexural Modulus | 1200 MPa |
| Notched Izod Impact At 23 C | 200 J/m |
| Notched Izod Impact At 40 C | 60 J/m |
| Hardness Shore D | 65 |
| Vicat Softening Temperature | 126°C |
| Heat Deflection Temperature At 0 45 Mpa | 75°C |
| Brittleness Temperature | < -70°C |
| Environmental Stress Crack Resistance 100 Igepal F50 | >1000 h |
| Volume Resistivity | >10^16 Ω·cm |
| Dielectric Strength | 20 kV/mm |
| Dissipation Factor | 0.0002 |
| Water Absorption | <0.01% |
| Thermal Conductivity | 0.45 W/m·K |
| Coefficient Of Linear Thermal Expansion | 1.2 × 10^-4 /°C |
| Melting Point | 134°C |
As an accredited Braskem HDPE SGE7252 factory, we enforce strict quality protocols—every batch undergoes rigorous testing to ensure consistent efficacy and safety standards.
| Packing | Braskem HDPE SGE7252 is packaged in 25 kg polyethylene bags, 40 bags per pallet, stretch-wrapped for transport. |
| Container Loading (20′ FCL) | Braskem HDPE SGE7252 loaded in 20′ FCL containers: 25 kg bags, palletized or floor-loaded, securely stowed for ocean transport. |
| Shipping | Braskem HDPE SGE7252 is typically shipped as solid polyethylene pellets in 25 kg bags, 500–1,250 kg jumbo bags, or bulk trucks/railcars. Store in a cool, dry, ventilated area away from ignition sources, direct sunlight, and moisture. Keep containers sealed, avoid static discharge, and handle per SDS and local regulations. |
| Storage | Store Braskem HDPE SGE7252 in a cool, dry, well-ventilated warehouse, away from direct sunlight, heat, sparks, flames, and strong oxidizers. Keep pellets in original sealed bags or containers, palletized and off the floor. Prevent moisture, dust, and contamination. Maintain FIFO stock rotation. Follow local regulations and the supplier’s SDS for safe handling, ventilation, and storage. |
| Shelf Life | Braskem HDPE SGE7252 has a recommended shelf life of 24 months when stored dry, cool, and in unopened original packaging. |
Continuous shuttle blow moulding of Braskem HDPE SGE7252 for monolayer household chemical containers typically begins with pellet moisture conditioning at 80 °C for 2 h only when storage relative humidity exceeds 60%, because atmospheric regain above 0.01 wt% can generate surface splay in the parison. Formulation ratios for detergent bottle stock use 100 parts SGE7252, 2.0–3.5 parts by weight low-viscosity PE colour masterbatch, and 0.3–0.8 parts by weight external lubricant or process-aid masterbatch; antioxidant packages are introduced by the resin manufacturer, and re-formulation on the shop floor is limited to drying and colourant addition to avoid shifting the molar-mass distribution that defines die swell. Compliance for non-hazardous household products is anchored to ASTM D1693-15 method B for environmental stress-crack resistance, with internal specifications commonly requiring F50 above 48 h in 10% Igepal CO-630 at 50 °C for bleach-bearing formulations; mechanical lot release uses ASTM D638-14 Type IV and ASTM D790-17 Method I flexural modulus. Downstream processing on continuous shuttle machines commonly runs a 24:1 to 30:1 L/D single-screw extruder with barrel temperatures from 170 °C near the feed throat to 195 °C at the metering zone, and a converging die head held at 195–205 °C; parison drop time is adjusted between 1.5 s and 5 s, and blow air pressure is maintained at 0.45–0.75 MPa. Mould cooling water at 12–22 °C and venting channels no larger than 0.1 mm prevent irregular crystallisation shrinkage on flat side panels. Terminal products from this configuration include detergent bottles of 0.5 L to 5.0 L, spray bottles with 28/410 neck finishes, and trigger bottle bodies requiring consistent finish dimensions to prevent stress whitening during capping.
Industrial jerrycan production from SGE7252 introduces a different process conflict: the same high melt strength that stabilises parison hang time can also produce insufficient pinch-off weld strength if the mould clamp sequence is not delayed until the flash zone reaches 140 °C. Formulation for 5 L to 25 L UN 3H1 jerrycans uses 100 parts SGE7252, 2.0–4.0 wt% carbon black or UV-stabilised masterbatch for outdoor storage, and 0.5–1.5 wt% antistatic masterbatch when the filled product is a flammable solvent with flash point below 35 °C; the antistatic loading is capped at the point where surface resistivity falls below 1011 Ω to avoid harming weld strength. Regulatory compliance rests on UN Model Regulations Chapter 6.1 for packaging type 3H1 plastics jerricans, including drop tests at 1.2 m and 1.8 m depending on packing group, hydrostatic pressure testing at 100 kPa to 250 kPa, and stack-load testing for 28 days at 40 °C; converters additionally apply ASTM D1693-15 condition C for high-stress agrochemical formulations containing ester solvents. Accumulator-head blow moulding machines with 10 kg to 40 kg shot capacity are standard, with extruder L/D ratios of 25:1 to 32:1, barrel temperatures 180–200 °C, head temperatures 200–215 °C, and multi-point parison programming set to generate a bottom wall thickness 0.4–0.9 mm thicker than the sidewall. Terminal products are UN-certified jerrycans for agricultural pesticides, lubricating oils, and industrial solvents, where handle pinch-offs and top seams are inspected for continuous weld geometry and leak-tested at 20 kPa internal air pressure.
Coextrusion of SGE7252 skin layers over a PCR-HDPE core is a structured application where layer ratio error and melt viscosity mismatch control the final panel stiffness and ESCR. A typical three-extruder configuration uses 100 phr SGE7252 for the outer and inner layers with 10–20 wt% of the inner skin replaced by a PE-based colourant where required, while the core layer comprises 30–60 wt% post-consumer HDPE reclaim; the practical upper limit is set by the PCR melt flow measured at 190 °C/2.16 kg according to ASTM D1238-20 and by moisture content below 0.05 wt% before extrusion. Pre-drying of PCR at 80 °C for 4 h is applied when regrind from detergent bottles contains polar residues or when relative humidity exceeds 60%. Compliance with the European Packaging and Packaging Waste Directive 94/62/EC and the EU Plastics Regulation (EU) No 10/2011 applies to recycled content used in food-contact only where the PCR is derived from an authorised recycling process, while REACH Candidate List testing for SVHCs is performed on every PCR lot. Downstream process machinery uses three independently controlled single-screw extruders with 24:1–30:1 L/D barrels, metering sections set to maintain a melt temperature difference between skin and core of no more than ±5 °C, and a coextrusion head with spiral mandrel flow channels to prevent interfacial instability; blow moulds are cooled with 8–18 °C water and must vent at the pinch-off to prevent gas entrapment in the flash region. Terminal products include household cleaner bottles with 30% to 60% recycled content, industrial washroom refills, and automotive care containers where the outer skin retains virgin SGE7252 colour and the inner PCR layer is not in direct contact with aggressive surfactant systems.
| Control dimension | Method / standard | Converter decision point |
|---|---|---|
| Melt flow rate | ASTM D1238-20 | Lot-to-lot variation ±10% at 190 °C/2.16 kg |
| Density | ASTM D792-20 / ISO 1183-1:2022 | Density shift alters bottle top-load and ESCR |
| Environmental stress-crack resistance | ASTM D1693-15 Method B/C | 10% Igepal CO-630 at 50 °C for bleach/ester systems |
| Tensile yield stress | ASTM D638-14 Type IV | Notch sensitivity at handle pinch-offs |
| Flexural modulus | ASTM D790-17 Method I | Panel stiffness in rectangular containers |
| UN jerrican certification | UN Model Regulations Chapter 6.1, packaging type 3H1 | Drop, hydrostatic, and stack-load acceptance |
| Recycled content compliance | Directive 94/62/EC / REACH Candidate List | SVHC documentation for PCR core |
Cosmetic and personal-care bottle lines that run SGE7252 for high-gloss oval containers between 50 mL and 400 mL typically add 1.0–2.0 wt% of a high-opacity colourant masterbatch and 0.2–0.5 wt% of a PE-based slip additive if the filling line uses automatic unscrambling; the base resin is maintained at 100 parts by weight. Published data for this specific configuration is limited for pearlescent or metallic-effect masterbatch loadings above 3 wt% with respect to drop-impact consistency. Compliance for cosmetic packaging is governed by REACH Annex XVII Entry 72 for CMR substances in consumer articles and, where relevant, packaging contact safety assessments under EU Cosmetic Regulation (EC) No 1223/2009 for the finished formulation, not the bottle itself. Process conditions rely on single-station shuttle blow moulding with mould temperatures held at 15–25 °C, blow air at 0.4–0.6 MPa, and cycle times of 12–30 s depending on bottle wall thickness. Terminal article families are lotion tubes, cosmetic squeezable bottles, and travel-size containers with 24/410 or 28/410 neck diameters, where surface gloss and lack of die lines determine acceptance.
Container designs that integrate an offset handle or a through-handle cavity introduce a much narrower processing window because the parison must inflate around sharp core pins and then consolidate at the shoulder to survive induction sealing torque. In this scenario, SGE7252 is formulated at 100 parts resin with 0.5–1.0 phr of high-molecular-weight processing aid to suppress melt fracture at the handle core, while colour masterbatch addition is kept at 1.5–2.5 wt% to avoid local viscosity reduction that causes thin spots at the handle bridge. The relevant industry standards for filled product compatibility are ASTM D543-20 immersion testing for chemical resistance and ASTM D1693-15 condition A or B ESCR; for shipping, ISTA 3A or 6A transport simulation is applied to the filled container. Production is performed on accumulator-head or reciprocating-screw blow moulding equipment with parison programming of at least 10 points; head tooling is designed with a divergent mandrel and land length-to-gap ratio of 5:1–10:1 to reduce weld-line stress at the handle pinch-off. Screw tip temperatures are held at 190–205 °C, and the mould is cooled to 10–18 °C on the handle plug while the bottle body runs at 20–25 °C; this differential cooling prevents post-mould shrinkage that pulls the handle flash off-axis. Terminal products include handled detergent jugs from 2 L to 10 L, automotive refill bottles with side handles, and agricultural measuring jugs where the shoulder must remain flat for foil seal placement.
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Braskem HDPE SGE7252 is a high-density polyethylene extrusion blow-moulding grade supplied as pellet feedstock for rigid packaging and industrial container production. The grade is assigned a nominal density of 0.955 g/cm³ (ASTM D792) and a melt flow rate of 0.35 g/10 min at 190 °C under 2.16 kg load (ASTM D1238). The low melt flow index places the material in the high-molecular-weight HDPE segment, which increases melt strength during parison formation and improves environmental stress-crack resistance relative to injection-moulding HDPE grades with melt flow rates above 8 g/10 min. The primary conversion route is continuous or accumulator-head extrusion blow moulding of containers in the 0.5–10 L range. Applications reported in supplier literature include packaging for detergents, agrochemicals, motor oils, and household chemicals. The grade is not recommended for blown film, injection moulding of thin-wall parts, or potable-water pressure pipe without specific regulatory verification.
For the same grade, the exact certificate of analysis values for melt flow rate and density may vary by production lot; current supplier documentation should be used for release testing. The information below describes typical processing and application boundaries rather than a substitute for process validation.
Extrusion blow moulding of HDPE with a melt flow rate of 0.35 g/10 min requires attention to barrel profile, screw geometry, and residence time. On single-screw extruders with 24:1 to 30:1 L/D ratios, feed-throat temperatures are typically maintained at 170 °C to 180 °C, while the metering zone and die head are set between 190 °C and 210 °C. Melt temperatures below 180 °C can generate unmelted gels and elevated back-pressure; melt temperatures above 220 °C can produce molecular-weight reduction, off-odour, gel formation, and excessive parison sag. The recommended total residence time at 210 °C is less than 10 min; at 220 °C, residence time should not exceed 5 min. These boundaries are derived from standard HDPE extrusion practice and should be confirmed by on-line melt-temperature probes and bottle-level mechanical testing.
Die tooling must account for parison swell. Typical annular die gaps of 1.8–2.5 mm are used for parison diameters up to 40 mm; observed diameter swell is commonly 35–50% for high-molecular-weight HDPE under these conditions. Accumulator-head machines require parison programming because the heavy parison of long containers with length-to-diameter ratios above 4:1 can thin under its own mass. On shuttle blow moulders, blow pressure is generally set between 0.6 MPa and 0.8 MPa, and mould temperature is held at 10 °C to 35 °C to balance surface quality and cycle time. Pre-drying is not routinely required for sealed pellet feed; however, pellet surface moisture above 0.05 wt% after outdoor storage or exposure to relative humidity above 60% should be removed by drying at 70 °C for 2 h to avoid surface splay and internal porosity.
Process failures observed on continuous extrusion lines running this melt flow class include sharkskin melt fracture at the die lip when screw speed forces shear rate above approximately 800–1,000 s⁻¹, and parison instability when the melt temperature is non-uniform around the die circumference. Corrective actions are reduction of screw speed, installation of a wider die gap, or replacement of worn die manifolds. Material changeover from higher-MFR HDPE requires purging with a transition HDPE compound; on accumulator-head equipment, cycling the accumulator at least 5 times with purge material clears dead zones that otherwise release degraded gel particles into the next production campaign.
The defining feature of SGE7252 is the combination of a low melt flow rate and a density of 0.955 g/cm³. The low MFR is an indirect indicator of high molecular weight and high chain entanglement; in contrast, general-purpose injection-moulding HDPE grades with MFR values from 8 g/10 min to 20 g/10 min flow readily into thin-wall moulds but exhibit lower ESCR and lower melt strength. For blow moulding, the high molecular weight is necessary to maintain parison stability while the extrudate is extruded and transferred to the mould.
| Property | Test method | SGE7252 typical value | General-purpose injection HDPE benchmark |
|---|---|---|---|
| Melt flow rate | ASTM D1238 (190 °C/2.16 kg) | 0.35 g/10 min | 8–20 g/10 min |
| Density | ASTM D792 | 0.955 g/cm³ | 0.952–0.960 g/cm³ |
| Flexural modulus | ASTM D790 | 1,200 MPa | 1,100–1,400 MPa |
| Tensile yield strength | ASTM D638 | 28 MPa | 26–30 MPa |
| Environmental stress-crack resistance | ASTM D1693 (100% Igepal, 50 °C) | >600 h F50 | <50 h F50 |
Mechanical property comparisons show that the biggest differentiation is not stiffness but environmental stress-crack resistance and melt-flow behaviour. High-molecular-weight HDPE grades intended for blow moulding withstand slow crack growth in the presence of surfactants and polar oils far longer than low-molecular-weight injection grades. However, the higher density of SGE7252 relative to lower-density HDPE blow-moulding resins of 0.946–0.950 g/cm³ increases top-load strength and reduces permeability, while ESCR generally decreases as density rises. Therefore, the selection of SGE7252 for aggressive detergent or agrochemical packaging should not be based on a single datasheet number; full bottle testing under simulated end-use conditions is required. Published peer-reviewed data for this specific configuration is limited, so the manufacturer's technical bulletin remains the authoritative source for lot-specific values.
Selection between SGE7252 and a higher-MFR blow-moulding HDPE grade should consider container size, wall thickness, and filling temperature. If the sidewall thickness is below 0.45 mm or the cycle time target requires a shorter parison, a grade with MFR of 0.60–0.80 g/10 min may be preferred, provided that the ESCR specification remains acceptable. SGE7252 is not a cap and closure grade; injection-moulded closures typically require MFR in the 2–8 g/10 min range to fill small gate systems without excessive pressure drop.
Environmental stress-crack resistance tests for HDPE containers are performed according to ASTM D1693, using constant-strain bent specimens immersed in 100% Igepal CO-630 at 50 °C. The F50 value represents the elapsed time to 50% specimen failure. High-molecular-weight blow-moulding grades are often specified with F50 values above 300 h for household detergent bottles and above 600 h for agricultural emulsifiable concentrates and industrial oils. SGE7252 is positioned in this stress-crack-resistant segment; actual values should be taken from the certificate of analysis because ESCR can shift with molecular-weight distribution, catalyst residues, and thermal history.
Moulded-in stress determines whether the resin's intrinsic ESCR is realised in a finished container. Sharp pinch-off lines, deep embossed logos, and sudden sidewall thickness transitions act as stress concentrators. Tooling should use pinch-off land widths of 0.3–0.8 mm and polished transition radii. Parison programming should produce a sidewall thickness uniformity of better than ±10% across the container body. Field data from extrusion blow-moulding lines show that thickness variation above ±15% in the lower sidewall can reduce drop-impact height and ESCR by more than 30% on standard container designs. These field values are comparative observations and require validation on the specific mould because container geometry dominates failure location.
Regrind incorporation must be controlled for environments that demand high ESCR. Repeated extrusion heat history reduces molecular weight and increases the carboxylic acid or hydroperoxide concentration that can accelerate oxidative degradation. For aggressive chemical containers, regrind content should be kept below 30 wt% unless lot-specific testing demonstrates equivalent ESCR and drop impact. The material should not be blended with lower-molecular-weight HDPE regrind from injection moulding unless the final melt flow rate and ESCR are retested. Avoid storage or filling at temperatures above 50 °C with strong oxidising acids, aromatic hydrocarbons, or ketones; these fluids can swell the amorphous regions and accelerate slow crack growth. The compatibility table of the end-use container should be confirmed by immersion testing at the maximum expected fill temperature and at 60 °C accelerated conditions.
HDPE grades of this class may be certified for food-contact applications under FDA 21 CFR 177.1520 and EU Commission Regulation 10/2011 when the grade is listed in the supplier's compliance certificate. These approvals are not automatic for every application; they depend on end-use temperature, food type, and migration testing under the intended conditions of use. For industrial packaging, the supplier may provide statements for REACH, RoHS Directive 2011/65/EU, and heavy-metal limits such as CONEG or EU Packaging Directive 94/62/EC. The specific compliance status of SGE7252 should be obtained from the current Braskem technical data sheet and certificate of compliance, not inferred from generic HDPE literature.
Quality documentation for incoming resin should include lot number, melt flow rate, density, colour, and contaminant level. Standard incoming inspection can use ASTM D1238 for MFR and ASTM D792 for density with a frequency of one sample per silo or lot. The processing plant should maintain records of barrel temperatures, melt temperature at the die, and cycle time for each lot. These records provide traceability if field failures occur. The material is supplied with a shelf life that should be confirmed on the packaging; outdoor storage of open supersacks in high humidity can increase surface moisture and require drying before extrusion.
