| HS Code | 800453 |
| Density | 0.954 g/cm³ |
| Melt Flow Rate | 0.35 g/10 min (190°C/2.16 kg) |
| Tensile Strength At Yield | 26 MPa |
| Tensile Strength At Break | 30 MPa |
| Elongation At Break | >600% |
| Flexural Modulus | 1250 MPa |
| Notched Izod Impact At 23 C | 80 J/m |
| Notched Izod Impact At 40 C | 40 J/m |
| Vicat Softening Point | 126 °C |
| Escr 100 Igepal F50 | >1000 h |
| Hardness Shore D | 65 |
| Brittleness Temperature | < -70 °C |
| Deflection Temperature At 0 45 Mpa | 75 °C |
| Water Absorption | <0.01% |
| Mold Shrinkage | 1.5-3.0% |
As an accredited Braskem HDPE FH35 factory, we enforce strict quality protocols—every batch undergoes rigorous testing to ensure consistent efficacy and safety standards.
| Packing | Braskem HDPE FH35 is typically supplied in 25 kg polyethylene bags, palletized and stretch-wrapped for secure industrial transport. |
| Container Loading (20′ FCL) | Braskem HDPE FH35 is loaded in a 20′ FCL, palletized in 25 kg bags, securely stowed for dry, compliant transport. |
| Shipping | Braskem HDPE FH35 is shipped as non-hazardous, solid polyethylene pellets. Standard packaging includes 25 kg bags, 1,000 kg jumbo bags, or bulk trucks/railcars. Store dry, away from direct sunlight, heat, and oxidizers. No special transport regulations apply; follow local handling and storage guidelines. |
| Storage | Store Braskem HDPE FH35 in a cool, dry, well-ventilated warehouse away from direct sunlight, heat, flames, and strong oxidizers. Keep original packaging closed, palletized, and off the floor to prevent moisture and contamination. Avoid prolonged UV exposure and excessive stacking. Maintain ambient temperature and follow the manufacturer’s safety data sheet and local regulations. |
| Shelf Life | Braskem HDPE FH35 shelf life: 24 months when stored dry, unopened, in original packaging, away from direct sunlight and heat. |
In thin-wall dairy container moulding, the limiting variable at wall sections below 0.45 mm becomes the solidification rate at the valve gate, not available clamp force. Braskem HDPE FH35, with a nominal melt flow rate of 35 g/10 min under ASTM D1238-20 at 190°C/2.16 kg and a nominal density of 0.956 g/cm³ under ASTM D1505, is processed in accumulator-assisted injection moulding machines with screw L/D ratio 20:1–25:1. The downstream process for 150–500 ml dairy cups and thin-walled tubs sets melt temperature between 200°C and 230°C, while mould coolant enters at 7–18°C to freeze the surface skin within 0.8–1.5 s of filling. Injection speeds above 300 mm/s are required to avoid flow hesitation marks; production-scale observations on 32-cavity hot-runner systems show that reducing injection velocity to 180 mm/s produces visible hesitation on sidewalls at flow length-to-wall thickness ratios above 150:1. The usable processing window narrows to ±5°C around a 215°C barrel set point when wall section falls below 0.45 mm: at 210°C the melt does not fill the rim before gate freeze, and at 220°C sink mark depth in the base increases beyond 0.10 mm. Industry compliance for direct food contact in the European Union falls under Regulation (EU) No 10/2011, Annex I, with an overall migration limit of 10 mg/dm²; United States food-contact status is specified under 21 CFR 177.1520(c) 3.2a for high-density olefin polymers. Addition ratios on production lines consist of 100 parts virgin FH35, 2–4 wt% white TiO2 masterbatch, and—only when demoulding requires—0.05–0.15 wt% erucamide slip additive; filler is omitted because even 5 wt% calcium carbonate reduces notched Izod impact under ISO 180/A below the threshold required for drop tests at 4°C. Terminal product types produced under this process envelope include 150–250 ml dairy and dessert cups, 500 ml yogurt tubs, 250 g margarine tubs, and tear-tab snap lids.
For overcaps and low-stress snap closures, the central conflict is between the high melt flow of FH35 and environmental stress crack resistance after moulded parts contact surfactant-based liquids. Braskem HDPE FH35 is specified at 100 parts where the closure is an overcap without structural thread load; where thread engagement and repeated opening torque are required, converters blend 15–25 wt% LLDPE with a melt index of 20 g/10 min or an mLLDPE of 1.0–2.0 g/10 min to raise ESCR, but exceeding 25 wt% LLDPE reduces axial top-load capacity by more than 15% when tested at 23°C on a universal testing machine at 50 mm/min. The processing route is multi-cavity injection moulding on 32–64 cavity hot-runner systems with valve-gated drops; barrel melt profile is set at 210–235°C, mould cooling at 10–20°C, screw back pressure at 8–15 bar, and holding pressure at 45–70 MPa. Cycle times range from 9–14 s depending on cap shell weight. A documented failure mode on these lines is batch-to-batch melt flow variation of ±2 g/10 min, which shifts cavity filling time by approximately 0.4 s in a 64-cavity tool and produces intermittent short shots if the holding-phase transition is fixed by timer rather than screw position. Industry compliance includes Regulation (EU) No 10/2011 for overcap food-contact use, 21 CFR 177.1520(c) 3.2a where US food-contact is specified, and REACH Regulation (EC) No 1907/2006 Annex XVII for restrictions on phthalates and heavy metals in cosmetic packaging. ESCR performance is tested under ASTM D1693-15e1, Condition B, 100% Igepal CO-630, and the specification minimum for detergent overcaps is typically F50 > 50 h. Regrind content must not exceed 20 wt% because higher ratios accelerate crack propagation at gate vestige stress concentrations. Terminal finished goods include cosmetic jar overcaps, laundry detergent spout caps, trigger spray shrouds, and tear-off tamper-evident bands on personal-care closures.
When nominal wall thickness in stackable housewares exceeds 1.8 mm, cooling time rather than melt flow rate dictates the cycle and the sink-mark defect rate. Braskem HDPE FH35 is formulated at 100 parts virgin resin with 1.5–3.0 wt% colour masterbatch; where higher rigidity is demanded for storage boxes, converters add 4–8 wt% fine-ground calcium carbonate with a stearate surface treatment, but the addition must not exceed 8 wt% because notched Izod impact under ISO 180/A drops below 3 kJ/m² and thin hinges crack during repeated opening. The downstream process is conventional single-phase injection moulding with a compression-ratio screw of 2.5:1–3.0:1, melt temperature 200–240°C, mould temperature 15–35°C, and holding pressure 40–70 MPa. Multi-zone mould cooling circuits with zone return-temperature differences above 4°C produce differential shrinkage that manifests as lid-to-base mismatch on stackable units; production-scale observations show that cycle-to-cycle coolant flow fluctuations cause more dimensional variance than pellet lot changes. Industry compliance for food storage articles follows Regulation (EU) No 10/2011 and 21 CFR 177.1520(c) 3.2a for food contact, while all colourants are screened against REACH Annex XVII; where products serve dual use as toy storage components, EN 71-3:2019+A1:2021 migration limits apply to the colourant package. Terminal product types include 10–50 L stackable storage boxes, drawer organisers, coat hangers, waste bins under 10 L, and small parts trays for workshop logistics.
Open-top pail production in 2–10 L sizes forces a balance between drop-impact toughness at low temperature and ESCR requirements for water-based paint and detergent service. Braskem HDPE FH35 is blended at 80–100 parts; where the pail must pass a -20°C drop test under ASTM D5276-19, converters add 5–10 wt% polyolefin elastomer impact modifier, but the same addition increases ovality on demoulding when mould temperature exceeds 25°C. For surfactant-resistant pails, 20 wt% of a lower-melt-flow HDPE blow-moulding grade with an ESCR value above 200 h under ASTM D1693 Condition C is compounded to mitigate environmental stress cracking. The downstream process uses accumulator-assisted injection moulding with a central valve gate in a hot runner; melt temperature is 210–240°C, mould coolant 10–25°C, injection pressure 70–100 MPa, holding pressure 45–70 MPa, and cooling time 15–25 s for a 5 L pail at nominal wall 1.2 mm. The principal production-scale failure is warpage caused by non-uniform gate freeze time across the base; observed base-to-sidewall angular deviation exceeds 2° when the valve gate closes before full packing has occurred in the base rim. Industry compliance for non-hazardous detergent and paint pails includes REACH Regulation (EC) No 1907/2006; where food bulk ingredients are packed, Regulation (EU) No 10/2011 overall migration limits apply. Distribution stack-load performance is confirmed by ASTM D4169-23 shipping simulation and ISO 2233:2000 conditioning prior to compression testing, with pass criteria set by the filler. Terminal product types include 2–10 L water-based paint pails, detergent pails, food bulk ingredient containers, and construction mixing pails.
Sequential heavy-metal migration testing of toy components first imposes a colour-masterbatch approval curve before any production parameter is fixed. For injection-moulded toy parts, Braskem HDPE FH35 is used at 100 parts with 1–4 wt% masterbatch; only pigments with documented migration results below the 19-element limit set in EN 71-3:2019+A1:2021 are permitted, and no post-consumer recycled content is used unless each batch passes heavy-metal screening under ASTM F963-23. The downstream process is closed-loop injection moulding with screw L/D ratio 18:1–22:1, melt temperature 190–220°C, mould temperature 10–30°C, injection speed 80–180 mm/s, and holding pressure 35–65 MPa. Because the 35 g/10 min melt flow rate permits large-area parts at reduced clamp force, the process is used for toy body panels; however, living-hinge designs are not recommended because HDPE does not develop the oriented hinge morphology that polypropylene achieves under repeated flexure. Industry compliance includes REACH Regulation (EC) No 1907/2006 Annex XVII entries 51 and 52 for phthalates, and EN 71-3:2019+A1:2021, with additional certification to ASTM F963-23 for US-bound finished toys. Terminal product types include building blocks, toy storage inserts, hobby model bases, and ride-on outer body panels.
Low-temperature drop resistance and gloss retention, not food-simulant migration, dominate cosmetic outer cap and jar body specifications. Braskem HDPE FH35 is processed at 100 parts for non-threaded outer caps; for threaded cosmetic jar caps that are repeatedly removed, 10–20 wt% LLDPE is blended to raise thread fatigue life on an automated torque fixture, but the blend produces a measurable loss of 60° gloss under ASTM D523; published data for this specific blend ratio is limited, so incoming lot gloss must be qualified before full production. The downstream process uses polished mould surfaces with SPI A-2 finish, melt temperature 200–230°C, mould temperature 15–30°C, injection speed 150–300 mm/s, and holding pressure 40–70 MPa. Mould venting is held below 0.02 mm to prevent flash on polished parting lines. Silicone external mould release is avoided if post-mould vacuum metallization is required because surface energy reductions cause adhesion failure on the metal layer. Industry compliance for the packaging component is evaluated under Regulation (EC) No 1223/2009, requiring that packaging not compromise cosmetic product safety; specific migration limits are not established for cosmetic packaging, so converters commonly apply Regulation (EU) No 10/2011 as a conservative simulant screen. REACH Annex XVII restrictions apply to heavy metals and phthalates in the pigment system. Terminal product types include fragrance jar outer caps, cream jar bodies, compact cases, and roll-on ball housings.
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Braskem HDPE FH35 is a high-density polyethylene homopolymer supplied in pellet form for extrusion blow molding. The grade designation FH35 corresponds to a nominal melt flow rate of 0.35 g/10 min at 190°C under a 2.16 kg load, determined in accordance with ISO 1133-1:2022 or ASTM D1238, and a nominal density of 0.954 g/cm³ determined in accordance with ISO 1183-1:2019 or ASTM D1505. The combination of low melt flow rate and medium-high density places the product in a high-viscosity, high-stiffness segment that is differentiated from injection molding HDPE grades with melt flow rates above 10 g/10 min and from high-density film grades with densities below 0.948 g/cm³. Because the product is supplied as a broad-molecular-weight-distribution resin, the shear-thinning response in the die land and the elongational viscosity at the parison surface determine processing latitude. The product is used in large containers, industrial bottles, automotive ducts, and rigid packaging produced on accumulator-head and continuous extrusion blow molding machines.
The high molecular weight associated with a melt flow rate of 0.35 g/10 min produces a higher zero-shear viscosity than HDPE grades rated at 0.70 g/10 min or 1.0 g/10 min. In practice, this property extends hang time for large parisons but also increases extruder backpressure and melt temperature rise. Capillary rheometry on similar high-viscosity HDPE grades indicates that apparent shear viscosity at 100 s⁻¹ and 190°C is typically in the range of 1,200 Pa·s to 2,500 Pa·s, while the same shear rate for a 20 g/10 min injection grade is below 300 Pa·s. Published data for this specific configuration is limited, so commercial processing should be based on grade-specific rheology curves. On continuous shuttle machines, the parison drop rate is adjusted to reduce sag-induced thickness variation. A melt temperature above 220°C reduces melt strength and produces nonuniform parison thinning in containers with a length-to-diameter ratio greater than 3:1. Conversely, melt temperatures below 180°C increase die swell and may cause incomplete pinch-off weld formation. The practical melt temperature window is therefore narrow, commonly 190°C to 210°C at the die head, with barrel setpoints from 180°C to 200°C depending on screw design and throughput. Screw configurations with a barrier section and a mixing element reduce unmelted pellet carryover, but the shear-sensitive nature of the material requires controlled screw speed to avoid excessive shear heating.
At the accumulator head, parison sag is controlled by die gap and extrusion speed rather than by melt temperature alone. Die gaps between 1.2 mm and 2.5 mm are typical for the grade in drum and bottle tooling; larger gaps reduce shear heating but thicken the parison wall, increasing cooling time. Mold temperatures from 10°C to 30°C are used to freeze surface finish and maintain dimensional stability. Blow air pressure is commonly maintained between 0.5 MPa and 0.8 MPa, with the lower boundary set by incomplete material distribution in deep-draw cavities and the upper boundary set by flash and pinch-off tearing. On production-scale machines with 60-mm screw diameter and 24:1 L/D, backpressure during continuous extrusion is reported in the range of 20 MPa to 35 MPa at screw speeds between 40 min⁻¹ and 70 min⁻¹, but actual values depend on screw design, head pressure, and temperature profile. These process boundaries are not grade-specific guarantees but represent common operating conditions for high-viscosity HDPE blow molding resins.
Mechanical response of HDPE FH35 follows the standard profile of a 0.35 g/10 min high-density polyethylene. Tensile yield stress in this density class is generally reported between 24 MPa and 28 MPa when tested according to ISO 527-2:2012 or ASTM D638-22; elongation at break typically exceeds 600% for unfilled extrusion blow molded sheet, but the value depends on sample preparation and cooling. Flexural modulus is commonly between 950 MPa and 1,200 MPa under ISO 178:2019. Notched Izod impact strength at 23°C for similar high-molecular-weight HDPE grades is reported between 5 kJ/m² and 12 kJ/m² under ISO 180, while low-temperature impact at -40°C can decline to 2 kJ/m² or below depending on molecular orientation and weld-line integrity. Brittle failure in chemical environments is typically assessed using environmental stress crack resistance according to ASTM D1693; for high-density blow molding grades with a melt flow rate near 0.35 g/10 min, F50 values in 100% Igepal at 50°C are commonly above 100 h, but grade-specific values should be obtained from the current technical datasheet. Thermal distortion under load is near 70°C to 80°C by ISO 75-2:2013 at 0.45 MPa, and Vicat softening temperature is typically 125°C to 130°C by ISO 306:2022.
The broad molecular weight distribution is inferred from the melt flow ratio, commonly measured as MFR at 21.6 kg divided by MFR at 2.16 kg. For blow molding grades of this class, the ratio is typically greater than 20, indicating high shear sensitivity. A high melt flow ratio supports die-head pumping at lower apparent viscosity but preserves parison hang time. The density of 0.954 g/cm³ indicates a short-chain branching content low enough to promote crystallinity, which contributes to barrier and stiffness. Differential scanning calorimetry on similar HDPE homopolymers shows a peak melting point near 132°C and a crystallinity of 65% to 70%, depending on cooling rate.
Replacing a conventional blow molding grade having a melt flow rate of 0.70 g/10 min to 1.0 g/10 min with FH35 alters the parison distribution and weld-line behavior. Because FH35 exhibits higher low-shear viscosity, the parison resists sag during the transfer phase, which improves wall-thickness uniformity in large bottles and drums. However, the same viscosity increases the minimum hydraulic pressure required in the die head and can reduce output by 10% to 20% on fixed-screw-speed lines. In thin-wall containers with nominal wall thickness below 0.6 mm, the lower melt flow may cause incomplete flow into sharp shoulder features unless die gap is widened or melt temperature is raised toward 210°C. Tooling designed for higher-melt-index HDPE often requires a larger die gap and a longer blow timer when switching to FH35. Conversely, tooling for multi-layer coextruded structures with an internal barrier layer may require a die-head adapter geometry adjustment because the viscosity ratio between FH35 and the barrier resin controls layer distribution. In continuous extrusion applications, screw speed should be reduced initially by 15% to 20% relative to a 0.70 g/10 min grade to prevent melt-temperature overshoot and gel formation. Direct substitution without screw-speed reduction can generate melt temperatures above 220°C and cause stream marks on the container surface.
Regulatory status for FH35 must be confirmed against the grade-specific compliance statement, but olefinic high-density polyethylene grades are typically evaluated under 21 CFR 177.1520 for food-contact use and EU Regulation No 10/2011 with its migration limits, including an overall migration limit of 10 mg/dm² for plastic materials in contact with food. The product is not classified as hazardous under REACH and RoHS when unmodified, but fabricated articles must be assessed for colorants, processing aids, and post-industrial recyclate. Moisture content in the pellet should be below 0.05% by weight for consistent extrusion; storage in hot, humid environments above 60% relative humidity may require pre-drying at 70°C to 80°C for 2 h to 4 h in a desiccant dryer, although HDPE is generally less hygroscopic than condensation polymers. The main chemical incompatibility is with strong oxidizing acids, aromatic hydrocarbons, and chlorinated solvents, which reduce molecular weight and promote environmental stress cracking. For diesel fuel and aqueous industrial chemicals, stress-crack resistance should be verified using ASTM D1693 or ISO 22088-3:2006 on finished containers because molded-in stress determines field performance.
In industrial container applications, the grade's density of 0.954 g/cm³ provides higher top-load strength and burst resistance than HDPE film grades with density below 0.948 g/cm³. Drop impact testing of blow molded containers made from similar high-density HDPE is often performed according to ASTM D2463 or internal customer procedures; production parts are expected to withstand at least 0.2 MPa internal pressure for standard household chemical bottles, but the required value depends on wall thickness and container geometry. Published burst data for FH35-specific finished articles is limited, and qualification must be performed on the actual container tooling. In automotive ducting, the lower melt flow rate improves pinch-off weld strength at the seam; manufacturers often section the flash and perform tensile tests on the weld to verify that seam strength reaches 80% or more of the parent wall strength. The product is not recommended for injection molding because the spiral flow length at 190°C is substantially shorter than that of injection-grade HDPE with melt flow rates above 10 g/10 min, and injection pressures in closed molds may exceed 80 MPa without adequate fill.
On continuous shuttle blow molding lines, failure modes observed when processing FH35 include melt-temperature overshoot due to high screw shear, die-lip drool, and parison curling. Die-lip drool is reduced by controlling die land temperature within ±5°C of the melt setpoint and by using a die gap not below 1.0 mm. Parison curling caused by nonuniform melt temperature at the die exit is addressed by rotating the die bushing or adjusting heater bands; the objective is to maintain die-head temperature variation below ±2°C. In accumulator-head machines, the accumulation time should be set to avoid stagnant melt regions: a hold time greater than 15 min at 210°C can cause yellowing or gel formation in high-molecular-weight HDPE, particularly in machines with dead spots in the head. The purge protocol after shutdown must include displacement with a lower-viscosity HDPE or polyethylene purge compound, because cooling FH35 in the head above 180°C followed by cold restart can require excessive torque.
In the Braskem HDPE portfolio context, FH35 sits at the low-melt-index end of the blow molding segment. The viscosity profile creates a distinct processing and property position relative to three other HDPE classes. Injection molding grades with melt flow rates from 8 g/10 min to 45 g/10 min fill thin-wall molds but lack parison strength. Film grades with melt flow rates below 0.1 g/10 min have higher molecular weight and superior toughness, but die pressures in blow molding are excessive. General-purpose blow molding grades with melt flow rates from 0.45 g/10 min to 0.70 g/10 min process faster but exhibit lower hang time. FH35 is therefore selected when the container mass is large, the parison length exceeds 30 cm, or the top-load requirement exceeds the capability of a lower-density copolymer. However, the grade is less effective in multi-cavity thin-wall bottle production with short cycle times below 8 s because cooling time is driven by the thicker parison required to maintain distribution.
