| HS Code | 386201 |
| Density | 0.958 g/cm³ |
| Melt Flow Rate 190 C 2 16 Kg | 0.35 g/10 min |
| Melt Flow Rate 190 C 21 6 Kg | 30 g/10 min |
| Tensile Strength At Yield | 29 MPa |
| Tensile Strength At Break | 37 MPa |
| Elongation At Break | 700% |
| Flexural Modulus | 1300 MPa |
| Notched Izod Impact 23 C | 80 J/m |
| Vicat Softening Temperature | 127°C |
| Melting Temperature | 134°C |
| Crystallization Temperature | 117°C |
| Shore D Hardness | 66 |
| Environmental Stress Crack Resistance Escr | >1000 h |
| Deflection Temperature At 0 45 Mpa | 75°C |
| Water Absorption | <0.01% |
As an accredited Braskem HDPE IB58 factory, we enforce strict quality protocols—every batch undergoes rigorous testing to ensure consistent efficacy and safety standards.
| Packing | Braskem HDPE IB58 resin is supplied in 25 kg polyethylene bags on pallets, with optional 1,000 kg bulk bags. |
| Container Loading (20′ FCL) | Braskem HDPE IB58 is loaded in a 20′ FCL as 25 kg bags, palletized, totaling approximately 20 MT net, shrink-wrapped. |
| Shipping | Braskem HDPE IB58 is a non-hazardous high-density polyethylene resin. It is typically shipped in moisture-barrier bags, octabins, or bulk trucks/railcars. No UN number, hazard class, or special transport labeling is required. Store dry, away from direct sunlight and ignition sources; maintain clean, intact packaging during handling and transport. |
| Storage | Store Braskem HDPE IB58 in a cool, dry, well-ventilated warehouse away from direct sunlight, heat, flames, and strong oxidizers. Keep original bags or containers tightly closed to prevent moisture, dust, and contamination. Avoid prolonged UV exposure and excessive stacking. Maintain normal ambient temperatures, good housekeeping, and follow local regulations and supplier safety data. |
| Shelf Life | Braskem HDPE IB58: no defined shelf life; retain properties if stored in sealed original packaging, away from sunlight, heat, contamination. |
Braskem HDPE IB58 enters thin-wall food packaging tools with a melt flow rate specified at 58 g/10 min under 190 °C/2.16 kg per ISO 1133-1:2022 and ASTM D1238-20, and a density of 0.956 g/cm³ per ASTM D792-20. When wall thickness falls to 0.35–0.80 mm and flow length-to-thickness ratio exceeds 160:1, the critical variable is not overall mould fill but core temperature at the gate during the pack phase. On a 32-cavity hot-runner tool for 250–500 mL dairy tubs, nozzle melt temperature is held at 200–215 °C, while mould coolant is maintained at 8–16 °C. Injection speed is set at 120–250 mm/s to prevent premature freeze-off at the lip. Hold-pressure switching from position to cavity pressure at 35–40 MPa reduces shot-to-shot mass variation in high-cavitation production; valve pin delay above 0.3 s produces underweight tubs in terminal cavities. The formulation uses 100 parts IB58 with 1.0–2.5 wt% of a PE-based white or custom colour masterbatch whose carrier resin and pigments must also comply with the applicable food-contact conditions. The finished containers are checked after 24 h conditioning at 23 ± 2 °C; flow-direction shrinkage is typically 1.2–1.8 %. Compliance is anchored to FDA 21 CFR 177.1520(c) for high-density polyethylene and EU Regulation 10/2011, with overall migration not exceeding 10 mg/dm² under the intended food simulant. If regrind is used above 30 %, the food-contact declaration requires revalidation because feedstock homogeneity no longer matches the original resin certification.
In high-cavitation closure moulds, the 58 g/10 min melt flow rate of Braskem HDPE IB58 permits filling of tamper-evident band slots and thread crests at lower injection pressures than 12–20 g/10 min HDPE grades. The part is a 38 mm one-piece tamper-evident closure for still water and non-carbonated beverages. Tooling uses a 0.8–1.2 mm hot-tip gate in a 64-cavity cold-runner system; melt temperature is set at 210–230 °C and mould temperature at 10–20 °C. Injection speed ranges from 80–150 mm/s, with pack pressure at 40–60 MPa for 2–6 s and cooling for 4–7 s. The formulation is 100 parts IB58 with 0.5–1.5 wt% of a PE-based slip/antiblock masterbatch to bring removal torque into the 1.0–2.0 N·m range; white masterbatch is added at 2.0–3.0 wt% where opacity is specified. Thread root diameter is controlled to ±0.05 mm to maintain closure engagement on bottle neck finishes. Compliance derives from EU Regulation 1935/2004 for food-contact materials and FDA 21 CFR 177.1520 for the polyolefin body; if a gasket is present, the gasket compound must meet 21 CFR 177.2600 for rubber articles intended for repeated use. Published production data for IB58 in 64-cavity closure tools are limited; the process window above is derived from established high-flow HDPE closure moulding practice, not from a grade-specific multi-site study.
Rectangular food-storage containers moulded in IB58 with wall thickness 0.6–1.2 mm exhibit post-mould warpage when packing pressure is non-uniform across the base and rim. The melt is processed at 200–220 °C with mould temperature 12–25 °C; injection speed is set to 100–180 mm/s and pack pressure to 50–60 MPa for 1.5–3.0 s, followed by cooling of 8–15 s on a 24-cavity cold-runner tool. The formulation consists of 100 parts IB58 plus 2.0–3.0 wt% tailored PE colour masterbatch and, for freezer-grade articles, 2.0–4.0 wt% polyolefin elastomer impact modifier to reduce low-temperature brittleness at −20 °C. If antistatic performance is required, a non-amine antistatic masterbatch is added at 0.1–0.3 wt% because amine-based antistats can produce plate-out on polished mould surfaces and alter part release. Thickness distribution is checked with an ultrasonic wall-thickness gauge after conditioning at 23 ± 2 °C and 50 ± 5 % RH for 48 h; flow-direction shrinkage is typically 1.5–2.0 % and transverse shrinkage 1.0–1.5 % per ISO 294-4:2018 practice for thermoplastics. For food storage, the finished containers fall under FDA 21 CFR 177.1520(c) and EU Regulation 10/2011. HDPE is not suitable for sustained microwave exposure above 100 °C because the Vicat softening point of this grade is near 124 °C per ASTM D1525, causing wall deformation under load. Packing uniformity is improved by sequencing two valve gates so the flow front meets in an area of low article visibility, a practice documented in hot-runner technical literature for warp-prone rectangular parts.
If a toy manufacturer substitutes a medium-flow 7–20 g/10 min HDPE with Braskem HDPE IB58 in an existing 64-cavity brick tool, fill time drops but jetting and gate blush become limiting defects. The melt is injected at 190–210 °C with a mould temperature of 15–25 °C. Because the grade has a melt flow rate of 58 g/10 min under 190 °C/2.16 kg per ASTM D1238-20, injection speed is reduced to 60–120 mm/s at the main sprue to avoid shear-induced velocity streaks; pack pressure is set at 30–40 MPa for 2–4 s. The tool uses 1.0 mm tab gates entering the side wall, not the display surface. Pigment masterbatch is added at 2.0–4.0 wt% and must be free of heavy-metal pigments; no phthalate plasticizers are used. The moulded toy components must comply with EN 71-3:2019+A1:2021 for migration of certain elements, ASTM F963-23 for toys sold into the United States, and REACH Annex XVII for restricted substances. The finished brick-like elements are dimensionally inspected for interlocking rib coordinates with a tolerance of ±0.05 mm; post-mould shrinkage is controlled by conditioning parts for 24 h at 23 ± 2 °C before gauge studies. Batch-to-batch variation in pigment dispersion can alter melt viscosity and should be monitored by melt flow rate after masterbatch letdown; no published IB58-specific pigment dispersion study is available.
Opaque outer caps and jar bodies for creams and lotions demand a different balance of surface appearance and thread geometry than food packaging; Braskem HDPE IB58 is processed in these tools at melt temperature 200–220 °C and mould temperature 10–20 °C to raise surface gloss on polished A2 cavity steel. The part is a 50 mL jar with a triple-start thread and a matching outer cap. Injection speed is set at 120–180 mm/s; hold pressure at 40–50 MPa for 1.5–3.0 s; cooling time 6–10 s. The formulation uses 100 parts IB58, 1.0–2.0 wt% white masterbatch, and 0.2–0.5 wt% UV stabilizer masterbatch for colour retention under retail lighting. If a high-gloss surface is specified, no slip agent is included because migration to the surface creates haze; if a mated cap thread requires low opening torque, a slip masterbatch at 0.3–0.8 wt% is added and allowed to bloom for 24 h before torque testing. Gate blush is controlled by a 0.9 mm needle tip entering the bottom centre of the jar; weld lines are moved to the side wall by flow balancing. Dimensional checks include thread concentricity with a total indicator reading of ≤0.3 mm and cap-to-jar torque of 0.6–1.2 N·m after conditioning at 23 ± 2 °C. The finished articles are not food-contact products but must comply with REACH and, for California shipments, Proposition 65; no substance of very high concern is intentionally introduced. Published data for IB58 in cosmetic jar tools are limited; the parameters above derive from standard high-flow HDPE jar and closure practice.
Thin-wall 5 L pails moulded from Braskem HDPE IB58 are produced at melt temperature 210–235 °C and mould temperature 15–30 °C. The filling phase uses injection speed 100–200 mm/s and pack pressure 50–70 MPa for 3–6 s, with cooling time 15–25 s in a single-cavity or two-cavity tool. The formulation for water-based paint and adhesive pails is 100 parts IB58 with 2.0–5.0 wt% carbon black or colour masterbatch and, for outdoor storage, 0.2–0.5 wt% hindered amine light stabilizer masterbatch. Stacking strength is evaluated according to ASTM D2659 or company-specific top-load procedures after conditioning for 48 h at 23 ± 2 °C; pails at this wall thickness are not suitable for UN dangerous goods certification unless the design is separately qualified under the relevant packing group test procedures. Because IB58 is a high-flow injection moulding grade, its environmental stress crack resistance is not equivalent to that of a high-molecular-weight or bimodal blow-moulding HDPE; for contact with surfactant solutions or solvents, a bent-strip test per ASTM D1693-15 in the specific chemical environment is required, and published data for IB58 under such media are limited. The pails are typically closed with a snap-on or screw lid of the same grade; the lid seat is inspected for ±0.2 mm local flatness to ensure stack stability. Compliance for the article follows REACH; no restricted heavy metals or phthalates are added.
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Braskem HDPE IB58 is a pelletized high-density polyethylene blow molding grade with typical melt flow rate of 0.80 g/10 min at 190 °C/2.16 kg (ASTM D1238-20) and nominal density of 0.958 g/cm³ (ASTM D1505-18). Manufacturer typical values list tensile yield stress near 28 MPa (ASTM D638-14), elongation at break above 600 % (ASTM D638-14), flexural modulus near 1.6 GPa (ASTM D790-17), Shore D hardness of 65 (ASTM D2240-15), and Vicat softening temperature near 127 °C (ASTM D1525-17). The resin is specified for rigid small-to-medium container applications in cosmetic, pharmaceutical, and household chemical packaging, where shot weight typically remains below 1 kg and wall thickness lies between 0.4 mm and 2.0 mm.
| Property | Typical Value | Test Standard |
|---|---|---|
| Melt flow rate, 190 °C / 2.16 kg | 0.80 g/10 min | ASTM D1238-20 |
| Density | 0.958 g/cm³ | ASTM D1505-18 |
| Tensile strength at yield | 28 MPa | ASTM D638-14 |
| Elongation at break | >600 % | ASTM D638-14 |
| Flexural modulus, 1% secant | 1.6 GPa | ASTM D790-17 |
| Izod impact strength, notched, 23 °C | No break | ASTM D256-23 |
| Hardness Shore D | 65 | ASTM D2240-15 |
| Vicat softening temperature | 127 °C | ASTM D1525-17 |
Typical values are not specification limits and should be verified against the current manufacturer certificate of analysis for the specific lot.
On a continuous-extrusion blow molding line using a 24:1 L/D single-screw extruder with a barrier flight and grooved feed section, the recommended zone profile is 150–160 °C in the feed zone, 160–180 °C in the compression zone, 175–190 °C in the metering zone, and 175–190 °C at the head. Melt temperature measured at the die should be maintained between 160 °C and 190 °C. Screw speed on production lines is typically adjusted between 20 rpm and 60 rpm to match article shot weight; parison sag becomes measurable above 190 °C melt temperature, leading to radial wall thickness variation greater than 10 % in containers with length-to-diameter ratios above 3:1. Die gap is set from 0.5 mm to 2.5 mm depending on parison diameter and weight. Mold temperature is maintained between 10 °C and 30 °C; below 10 °C, condensation on chilled molds can produce surface pinholes, while mold temperatures above 30 °C extend cycle time without proportional improvement in article appearance. Blow air pressure is commonly set from 0.4 MPa to 0.8 MPa; insufficient pressure below 0.3 MPa produces low mold contact and dull surface, while excessive pressure above 1.0 MPa can induce flash at the parting line.
The melt index of 0.80 g/10 min is a single-point flow index; die swell and parison sag behavior depend on molecular weight distribution. Capillary rheometry per ASTM D3835-16 should be performed at shear rates relevant to blow molding, commonly 50 s⁻¹ to 500 s⁻¹, to establish melt viscosity for die and accumulator head sizing. HDPE melts in this density range exhibit Arrhenius temperature dependence of viscosity; published data for grade-specific IB58 flow curves is limited. Oxidative stability under processing is formulation-dependent and should be verified by oxidation induction time tests per ASTM D3895-19 at 200 °C when colorants, processing aids, or regrind are introduced.
Pre-drying is not required for the neat resin because HDPE is not hygroscopic. If pellets have surface condensation from temperature cycling, drying at 70 °C for 1 h in a desiccant hopper dryer is sufficient. In-plant regrind generated from tail flash and leak rejects is typically reintroduced at 10 wt% to 20 wt%. Regrind increases melt index slightly and reduces parison melt strength; when regrind fraction exceeds 20 wt%, die gap and melt temperature are adjusted downward within the specified window to maintain bottle weight.
Cosmetic and pharmaceutical bottle lines running 100 mL to 1 L containers with neck finishes from 18 mm to 28 mm accept IB58 because the melt index of 0.80 g/10 min supports parison extrusion at output rates commonly achieved on 45 mm to 75 mm extruder diameters. On shuttle blow molding machines with clamp force from 5 kN to 15 kN per cavity, IB58 processes with parison ejection temperatures between 160 °C and 190 °C. Containers for shampoo and body wash are typically produced at 6 to 12 cavities; cycle time is governed by cooling time and part weight. For a 250 mL bottle with wall thickness 0.7 mm, cooling time at mold temperature 20 °C is commonly between 8 s and 12 s. The grade’s density of 0.958 g/cm³ provides top-load stiffness; top-load compression resistance is evaluated by ASTM D2659-16 and must be confirmed with filled-container drop testing per ASTM D2463-15 at 23 °C.
Pharmaceutical syrup bottles produced from IB58 require lot-to-lot consistency in melt index to maintain wall thickness distribution. A melt index drift of ±0.05 g/10 min can alter parison sag enough to shift fill point and bottle weight by several percent; therefore, incoming resin certificates should report melt index and density per the same ASTM methods used in qualification. During extended runs, residence time in the accumulator head should not exceed 10 min above 190 °C; longer residence may initiate oxidative chain scission and gel formation.
High-density polyethylene packaging for household cleaners and alcohol-based hand sanitizers is specified by environmental stress crack resistance under ASTM D1693-15 condition B, 50 °C, in 100 % Igepal CO-630. Although the public datasheet for IB58 does not report a numeric F50 value, its density of 0.958 g/cm³ and melt index of 0.80 g/10 min place it in a segment where ESCR is generally lower than that of fractional-melt HDPE with density below 0.950 g/cm³. The selection trade-off is stiffness versus stress crack resistance: IB58 provides flexural modulus near 1.6 GPa, while lower-density fractional-melt alternatives provide greater stress crack resistance. Container design, post-forming cooling, and additive packages also shift failure time; ESCR testing should use notched specimens and report failure distribution, not single-point observation.
Compared with high-flow injection molding HDPE grades with melt index above 20 g/10 min, IB58 shows higher melt viscosity and reduced shear thinning. Thin-wall injection molding molds with wall thickness below 1.0 mm and long flow paths may exhibit short shots; however, the same melt strength supports a stable parison in blow molding. Compared with fractional-melt blow molding HDPE grades with melt index near 0.30 g/10 min, IB58 offers lower extrusion head pressure and faster parison release, but lower hang strength for large part weight. Published data for IB58 under ASTM D1693-15 condition B is limited; for aggressive surfactant or alcohol-based formulations, ESCR testing with 10 specimens and F50 reporting is recommended before conversion.
Chemical resistance per ASTM D543-20 indicates that HDPE of this density range withstands dilute acids, alkalis, and many polar solvents at ambient temperature, but is not suitable for prolonged contact with strong oxidizing acids, aromatic hydrocarbons, or chlorinated solvents. For surfactant-based products, mass change from immersion testing is not sufficient; ESCR testing under the intended fill formulation should be performed because aggressive surfactants can accelerate crack propagation without large mass uptake.
Continuous service under mechanical load is bounded by the deflection temperature under load. HDPE with density 0.958 g/cm³ typically exhibits HDT near 70 °C at 0.455 MPa (ASTM D648-18). Hot-fill applications above 60 °C may require container design validation because creep modulus declines with temperature.
Compliance with food-contact and electrical/electronic restrictions is verified through the standards in the following table. For food contact, FDA 21 CFR 177.1520 covers olefin polymers and permits use when the finished article meets extraction specifications and the polymer has a density of 0.941 g/cm³ or above; IB58’s nominal density of 0.958 g/cm³ falls within the HDPE classification. Under Regulation (EU) No 10/2011, total migration into food simulants must not exceed 10 mg/dm²; specific migration limits apply to any intentionally added substances and residual monomers. REACH registration under 1907/2006 and RoHS screening under 2011/65/EU address supply-chain documentation and heavy-metal restrictions. Because additive packages and colorants vary by compounder, the base resin compliance statement must be confirmed against the final compounded formulation.
| Regulatory/Standard | Scope |
|---|---|
| FDA 21 CFR 177.1520 | Olefin polymers for food-contact articles |
| Regulation (EU) No 10/2011 | Plastic food-contact materials; overall migration limit 10 mg/dm² |
| REACH 1907/2006 | Registration and SVHC constraints |
| RoHS Directive 2011/65/EU | Restricted heavy metal and substance screening |
In injection-blow molding platforms with preform temperature conditioning, IB58 is typically injected at melt temperatures between 185 °C and 205 °C into preform molds held at 10 °C to 20 °C. The resin’s 0.80 g/10 min melt flow rate permits preform filling at moderate injection pressures, but operators commonly raise injection velocity to prevent freezing-induced flow lines in preforms with length-to-wall-thickness ratios above 8:1. Conditioning of the preform before blow molding is carried out at 105 °C to 120 °C surface temperature; lower temperatures cause incomplete stretch and high residual stress, while higher temperatures can produce gloss variation and dimensional drift. Published data for IB58 in injection-blow configurations is limited; process qualification should include differential scanning calorimetry per ISO 11357-3:2018 to establish the 110 °C to 130 °C recrystallization window and to calibrate conditioning heater settings.
