| HS Code | 963459 |
| Product Name | Braskem HDPE HD3403S |
| Polymer Type | High Density Polyethylene (HDPE) |
| Comonomer | Hexene-1 |
| Catalyst Type | Ziegler-Natta |
| Density | 0.934 g/cm³ |
| Melt Flow Rate 190 C 2 16 Kg | 0.3 g/10 min |
| High Load Melt Index 190 C 21 6 Kg | 30 g/10 min |
| Melt Flow Ratio I21 I2 | 100 |
| Tensile Strength At Yield | 24 MPa |
| Tensile Strength At Break | 30 MPa |
| Elongation At Break | > 600 % |
| Flexural Modulus | 1000 MPa |
| Vicat Softening Point | 126 °C |
| Brittleness Temperature | < -70 °C |
| Environmental Stress Crack Resistance Escr | > 1000 h |
| Notched Izod Impact | No Break |
| Shore D Hardness | 62 |
As an accredited Braskem HDPE HD3403S factory, we enforce strict quality protocols—every batch undergoes rigorous testing to ensure consistent efficacy and safety standards.
| Packing | Braskem HDPE HD3403S is typically packaged in 25 kg polyethylene-lined bags, palletized and stretch-wrapped for industrial storage and transport. |
| Container Loading (20′ FCL) | Braskem HDPE HD3403S is loaded in a 20′ FCL container as 25 kg bags, palletized or floor-loaded, dry and secure. |
| Shipping | Braskem HDPE HD3403S is shipped as a non-hazardous solid polyethylene resin in bags, octabins, or bulk trucks/railcars. It has no UN number, hazard class, or packing group and is not regulated by DOT, IMDG, or IATA. Keep dry and avoid excessive heat. |
| Storage | Store Braskem HDPE HD3403S indoors in a cool, dry, well-ventilated warehouse, away from direct sunlight, heat, flames, and strong oxidizing agents. Keep original packaging sealed; place pallets off the floor. Avoid moisture, contamination, and excessive stacking. Maintain good housekeeping to prevent dust accumulation. Follow local regulations and the supplier’s SDS. |
| Shelf Life | Braskem HDPE HD3403S: indefinite shelf life if stored in original packaging, cool, dry, well-ventilated area, away from sunlight and heat. |
Injection-moulded beverage and personal-care closures produced from Braskem HDPE HD3403S require a nozzle melt temperature between 220 °C and 245 °C, with mould-wall temperatures of 8 °C to 20 °C for rapid solidification in 32- to 128-cavity hot-runner tools. The injection unit is typically a 25–35 mm diameter reciprocating screw with a low-shear general-purpose polyethylene profile and a compression ratio of 2.0:1–2.5:1; plasticising capacity should be at least 1.2 times shot weight to avoid short residence-time spikes. Lot-specific melt-flow values under ISO 1133-1:2022 condition 190 °C/2.16 kg and density by ISO 1183-1:2019 should be checked against the Braskem certificate of analysis because reactor-campaign variation may shift flow length by 5–10%; the medium-flow viscosity bracket generally associated with HD3403S, approximately 3–5 g/10 min, is a short-cycle closure window that still avoids excessive sink marks. Colour and slip are introduced as polyethylene-carrier masterbatch; typical let-down is 1.5–2.5 wt% for pigment and 800–1,300 ppm erucamide in the final part, measured by gas chromatography after Soxhlet extraction. If the closure is used for milk, juice, or bottled water, migration of total non-volatile extractives must remain within the limits of Regulation (EU) No 10/2011 Annex II and FDA 21 CFR 177.1520(c)(2.2). The processor must avoid brominated carriers and free undeclared phthalates because induction-seal liners are sensitive to volatile by-products; instead, a low-vicat polyethylene-based masterbatch is preferred. In multicavity closure tools, short-shot balance studies are performed at 80% fill; the cavity weight variation must be below 1.5% before erucamide migration is assessed because unbalanced filling shifts cap skirt thickness to the low-torque side. Melt residence time in the barrel is limited to 5 min above 230 °C; burnt material at the check ring raises aldehydes and smoky odour, which fails organoleptic panel evaluation. The terminal article is a screw cap or flip-top closure with torque retention measured after 24 h at 40 °C and ovality verified on a vision gauging system to remain below 0.4 mm; typical cycle time in 16- to 64-cavity tools ranges from 8 s to 15 s depending on part mass and hot-runner balance.
Rigid logistics crates and beverage cases made from HD3403S are processed on medium-to-large injection moulding machines with clamp force from 450 t to 1,600 t, using screw diameters of 70–110 mm, melt temperatures of 235–250 °C, and mould temperatures of 12–25 °C to limit warpage from differential shrinkage. The critical formulation boundary is regrind: post-industrial crushed sprue and rejects can be fed at 15–20 wt% without losing Charpy notched impact strength at -20 °C below the 8 kJ/m² benchmark defined by ISO 179-1/1eA, but only if the regrind is dried for 2 h at 80 °C when plant relative humidity exceeds 60%; regrind fractions above 20 wt% shift the failure mode from ductile to semicrystalline brittle fracture at hinge bosses. A long-term thermal stabiliser package is required for crates stored outdoors under UV, typically 0.3–0.5 wt% of a UV-stabilised masterbatch with hindered amine light stabiliser and carbon black at 1.5–2.0 wt% let-down if the crate is specified black. The moulding sequence uses sequential valve-gated hot runners with filling time of 2.5–5.0 s, packing pressure of 45–60 MPa, and cooling time of 25–40 s for part weights between 1.2 kg and 4.0 kg; insufficient packing produces sink marks in the grid webs and reduces top-load capacity by up to 12%. For 500 mm-span grid sections, a cavity-pressure sensor placed near the last point to fill confirms that pressure at gate freeze is not below 25 MPa; below this threshold, frozen-in molecular orientation relaxes unevenly and causes corner uplift. The terminal article is a returnable beverage crate or distribution tote that must pass a 3,000 N top-load test at 23 °C and a 1,200 N load after 7 days at 40 °C, with deflection measured according to ISO 12048:1994 and final dimensions audited against a drawing tolerance of ±1.5 mm on length and width.
Open-head industrial pails of 5–25 L moulded in HD3403S require a different compliance pathway when the pail is certified as UN 1H2/Y for dangerous goods. The sidewall thickness is typically 2.0–3.5 mm, and the gate must be a direct sprue or full hot-runner valve gate rather than an edge film gate to avoid a weak knit-line across the bail-ear bosses. Melt temperature is held at 230–250 °C with a mould temperature of 15–30 °C; injection pressure at the machine is 90–120 MPa, and the screw uses a low-compression ratio of 2.0:1–2.5:1 to limit shear heating. ESCR acceptance for pail-grade HDPE is checked by ASTM D1693-15e1 condition B in 100% Igepal CO-630 at 50 °C; a failure time below 300 h for the welded bail-ear boss region rejects the production campaign because the boss is the highest residual-stress zone. UN certification also requires drop testing from 1.2 m at -18 °C after conditioning; cracks at the bail ear or gasket seat following impact fail the batch and eliminate the dangerous-goods listing. Outdoor pail stock uses 0.25–0.40 wt% UV stabiliser masterbatch and 1.0–2.0 wt% carbon black masterbatch, while water-based food or ink pails require migration compliance under FDA 21 CFR 177.1520 and Regulation (EU) No 10/2011 for total migration below 10 mg/dm². The terminal product is an open-top pail with gasket lid, subjected to stacking load of 300 kg for 28 days at 40 °C; pails that show more than 8 mm sidewall deflection or handle boss whitening during the stacking test are rejected.
| Application class | Standard/code designation | Test condition | Acceptance boundary |
|---|---|---|---|
| Food-contact closures | Regulation (EU) No 10/2011 Annex II | Total migration, aqueous simulants, 40 °C, 10 days | 10 mg/dm² |
| Returnable crates | ISO 12048:1994 | Top-load deflection at 23 °C | ≤25 mm |
| Dangerous-goods pails | UN 1H2/Y, ASTM D1693-15e1 | ESCR, Igepal CO-630, 50 °C | No cracking before 300 h |
| Pharmaceutical caps | USP <661.1>, ISO 8317:2015 | Extractables and child-resistance panel | Per monograph and panel protocol |
HD3403S housewares and kitchen components are typically moulded with food-contact-compliant pigment masterbatches at 1.0–3.0 wt% let-down and a process-stable antioxidant system that keeps yellowness index by ASTM D6290-19 below 2.0 after 100 h at 90 °C in forced air. The melt temperature is intentionally kept at the lower end, 215–235 °C, to avoid flavour carry-over and odour formation in closed storage boxes; mould temperature is set to 15–30 °C and the packing phase is extended to 8–15 s to reduce sink marks at the bottom bosses below 0.03 mm depth. For a 2.5 mm wall, cooling time must be at least 12 s; demoulding before the core reaches 85 °C increases post-mould shrinkage and warpage, especially when the part is later exposed to warm-water rinsing. If the article is exposed to dishwasher rinse cycles at 65 °C, the grade must be evaluated for distortion under a static load of 2.5 kg placed on the centre of the lid; HDPE heat deflection temperature measured by ISO 75-2:2013 method B under 0.45 MPa is generally below 75 °C, so top-rack use is the operational boundary, not bottom-rack exposure or steam cleaning. The terminal product is a sealed storage container, bread bin, or ice-cube tray with snap-fit lids, all covered by FDA 21 CFR 177.1520(c)(2.2) for food contact. The same formulation should not be used for infant feeding bottles or teats requiring sterilisation; repeated autoclave cycles at 121 °C exceed the long-term crystalline stability of this polyethylene matrix and can cause irreversible distortion.
Personal-care and cosmetic packaging components produced from HD3403S such as 50–250 mL jar bodies, compact cases, and pump bases are often designed with snap-fit undercuts and living-hinge geometries that require toughness without excessive cycle-time penalties. The hinge is gated perpendicular to the flexural axis and machined into the cavity with a radius of 0.20–0.35 mm; a flat-crowned hinge thinner than 0.8 mm leads to shear failure during first flexure, while thicker than 1.2 mm causes whitening at the hinge root after repeated closure. Colouration is limited to 0.5–2.0 wt% of a low-viscosity polyethylene-carrier masterbatch, and any pearlescent or mineral-filled masterbatch must be excluded because rigid platelets act as stress concentrators in the hinge. Melt temperature is 225–240 °C, mould temperature 15–25 °C, and injection speed is staged from 100 mm/s during flow through the hinge to 30 mm/s during packing. In multi-cavity production, cavity pressure sensors at the hinge gateway are used to reject cycles with filling pressure variation greater than 8%, because cavitation imbalance changes hinge thickness and reduces the flexural endurance repeatability. The terminal article is a flip-top cap or compact lid that passes a 5,000-cycle flex test at 23 °C without visual whitening; if the part is destined for skin-contact packaging, the lot must also comply with Regulation (EC) No 1223/2009 annexes for cosmetic packaging migration and the supplier must avoid slip additives that bloom after 14 days at 40 °C.
HD3403S can be used for pharmaceutical and nutraceutical container caps and solid-dose tablet bottles only when the lot is qualified under USP <661.1> for plastic packaging systems and FDA 21 CFR 177.1520. The cap resin must not contain intentionally added slip agents that transfer to the tablet surface; if slip is required for assembly, the processor uses 0.05–0.10 wt% of a high-molecular-weight silicone masterbatch instead of erucamide, which is volatile at 180 °C and can condense on the bottle rim. Melt temperature for pharmaceutical closures is held at 210–230 °C because residence time in the hot runner above 235 °C may increase extractable oligomers; mould temperature is 10–20 °C for dimensionally stable child-resistant teeth. The gate geometry must deliver a straight radial flow front into the child-resistant lugs; a pin-gated edge entry into a 0.7–1.0 mm lug can create a low-pressure void that fractures during child-resistant panel testing. The terminal article is a child-resistant cap and tamper-evident band that must pass ISO 8317:2015 child-resistant pack opening tests before commercial release, with an open/close torque requirement of 0.5–2.5 N·m after 100 cycles. Due to the sensitivity of the pharmaceutical supply chain, the processor must document regrind content below 5 wt% and separate food-grade feedstock from industrial HDPE lots to avoid cross-contact with non-compliant additives; a Type III drug master file may be referenced by the moulder for FDA submission.
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Braskem HDPE HD3403S is a high-molecular-weight high-density polyethylene grade positioned for extrusion blow molding, sheet extrusion, and multilayer coextrusion where environmental stress crack resistance is weighted more heavily than maximum flexural modulus or short injection cycle time. Manufacturer-published typical data place the melt flow rate at 0.35 g/10 min at 190°C/2.16 kg when measured according to ASTM D1238 or ISO 1133-1:2022, and the solid-state density at 0.943 g/cm³ when measured according to ASTM D1505. The combination of a relatively low density for HDPE and a fractional melt index indicates a broad molecular weight distribution with a pronounced high-molecular-weight tail. This molecular architecture raises low-shear viscosity and die swell while retaining sufficient shear thinning for continuous parison extrusion on grooved-barrel single-screw extruders with 25:1 to 30:1 L/D. Compared with a standard 0.952 g/cm³ unimodal injection molding HDPE, HD3403S sacrifices stiffness and melt flow for improved environmental stress crack resistance, low-temperature impact, and parison melt strength.
| Property | Test method | Typical value |
|---|---|---|
| Melt flow rate, 190°C/2.16 kg | ASTM D1238 | 0.35 g/10 min |
| Density | ASTM D1505 | 0.943 g/cm³ |
| Tensile strength at yield | ASTM D638-14 | 22 MPa |
| Elongation at break | ASTM D638-14 | >800% |
| Flexural modulus | ASTM D790 | 900 MPa |
| Vicat softening point | ASTM D1525 | 124°C |
| Environmental stress crack resistance, F50, 100% Igepal CO-630, 50°C | ASTM D1693 condition B | >1000 h |
| Hardness, Shore D | ASTM D2240 | 62 |
Table entries are manufacturer-published typical values for natural resin and should not be read as lot-release specification limits. Batch certificate values may vary within ±0.02 g/cm³ for density and ±0.05 g/10 min for melt flow rate depending on production campaign, sampling port, and pellet drying history.
On shuttle blow molding machines equipped with 80–120 mm grooved-barrel extruders, the practical melt temperature window at the die head is bounded between 190°C and 210°C. Operation below 185°C produces measurable melt pressure instability and irregular parison wall thickness due to incomplete melting of high-molecular-weight domains. Operation above 220°C reduces parison sag resistance, lengthens cooling time, and increases oxidative degradation risk when die residence time exceeds 8 min. Representative barrel profiles are 170–180°C in feed, 180–190°C in compression, 190–200°C in metering, and 195–205°C at head and die zones. Die swell is typically 35–45% at apparent wall shear rates between 100 s⁻¹ and 500 s⁻¹; tooling drawdown ratios above 3:1 can compensate for swell but may create residual orientation stress in pinch-off zones.
Pre-drying is not required at ambient relative humidity below 60%. Above that threshold, surface moisture can generate pockmarks and delamination in thick extrudate; a hopper dryer at 70–80°C for 2–3 h is effective. When pre-compounding with carbon black masterbatch for outdoor stabilization, a co-rotating twin-screw extruder with 40:1 L/D and atmospheric venting is typically operated at 180–200°C barrel temperature and 250–350 rpm screw speed, yielding a specific mechanical energy input of 0.12–0.18 kWh/kg. The melt flow ratio of condition F to condition B is not always included in abbreviated datasheets; in comparable high-ESCR HDPE grades it typically falls between 18 and 22, but HD3403S requires direct measurement per ASTM D1238 condition F if parison sag is a critical-to-quality parameter. Published data for HD3403S at shear rates above 1000 s⁻¹ are limited; capillary rheometry and full-scale die validation are recommended before specifying multi-cavity tooling.
Accumulator blow molders with 1–5 kg shot capacity and 80–100 mm annular dies exhibit lower parison sag with HD3403S than with a 0.35 g/10 min unimodal HDPE because the broad molecular weight distribution and high-molecular-weight tail increase melt elasticity. However, this same melt characteristic raises die swell and may require a larger die gap; a die gap setting of 10–15% of final wall thickness is a common starting point. On rotary wheel blow molders running 12-station configurations at 55–70 cycles/min, melt temperature uniformity across the manifold becomes critical. Temperature differences above 5°C between side and center melt streams produce visible thickness variation. Published data for HD3403S in rotary wheel configurations are limited; pilot trials are required before large-scale mold commitments.
Sheet extrusion of HD3403S typically uses a 120–150 mm single-screw extruder with a barrier screw and 30:1 L/D, feeding a coat-hanger die with a restrictor bar. Melt temperature at the die entrance is held at 195–210°C; polishing roll temperatures of 70–90°C top and 60–80°C bottom maintain gloss while preventing point chill marks. Sheet thickness from 1.5 mm to 8.0 mm can be produced with a draw ratio of 1.05:1 to 1.20:1; higher draw ratios induce orientation anisotropy measurable as greater machine-direction shrinkage per ASTM D2732.
Thermoforming of extruded HD3403S sheet demands sheet surface temperature between 160°C and 175°C. Below 155°C, the high-molecular-weight fraction resists sag and produces incomplete plug-assisted forming; above 185°C, local thinning occurs at female corners. Male plug materials such as syntactic foam with 0.7–0.9 W/m·K thermal conductivity prevent premature quenching. Published data for HD3403S in plug-assisted thermoforming of depth-to-diameter ratios above 0.8:1 are limited; mold trials with adjustable plug speed and temperature are required.
Regrind addition up to 30 wt% is common in blow molding of industrial containers, but each pass through a high-shear granulator reduces the high-molecular-weight fraction. At regrind levels above 40 wt%, melt flow rate can increase by 5–10% and environmental stress crack resistance may fall below 800 h; therefore, a sieve analysis per ASTM D1921 and melt flow verification per ASTM D1238 should be performed on regrind lots. In sheet extrusion, lower regrind levels below 20 wt% are specified for food-contact applications under EU 10/2011 unless the regrind is from the same process and meets the same migration limits.
In chemical containment applications, the lower density of HD3403S relative to 0.956 g/cm³ high-stiffness HDPE must be interpreted in terms of wall thickness and crystallinity distribution rather than inferred as a direct permeation deficiency. For nonpolar hydrocarbon fill goods, permeation is dominated by container wall thickness, closure seal integrity, and the percent crystallinity gradient through the wall. HD3403S is typically considered for 200 L tight-head drums and intermediate bulk container bottles where UN 1H1 qualification requires drop impact at -18°C after conditioning. ESCR measured according to ASTM D1693 condition B in 100% Igepal CO-630 at 50°C is reported above 1000 h for the natural resin; this performance supports use with surfactant-containing cleaners, dilute acids, and alcohol-water mixtures that produce brittle fracture in lower-ESCR unimodal HDPE grades.
Relative to a 0.952 g/cm³ blow molding grade with equivalent nominal melt flow rate, HD3403S has lower flexural modulus and lower top-load performance but greater environmental stress crack resistance and low-temperature impact. The trade-off is quantified by the comparative property matrix below. In thin-wall injection molded closures, HD3403S is not a substitute for an injection molding HDPE with 20 g/10 min melt flow rate because the high molecular weight tail increases filling pressure, extends cooling time, and can cause jetting in thin-flow-length-to-thickness ratios above 200:1.
| Property | Braskem HD3403S | Unimodal HDPE injection molding grade | High-stiffness blow molding HDPE |
|---|---|---|---|
| Melt flow rate, 190°C/2.16 kg | 0.35 g/10 min | 20 g/10 min | 0.30 g/10 min |
| Density | 0.943 g/cm³ | 0.956 g/cm³ | 0.956 g/cm³ |
| Flexural modulus | 900 MPa | 1300 MPa | 1200 MPa |
| ESCR, F50, 100% Igepal CO-630, 50°C | >1000 h | <20 h | 150 h |
| Tensile strength at yield | 22 MPa | 28 MPa | 26 MPa |
| Typical process | Blow molding, sheet extrusion | Injection molding | Blow molding, structural parts |
The main separation is rheological. HD3403S has a low melt flow rate relative to injection molding grades, which makes it unsuitable for multicavity thin-wall injection molding but advantageous for continuous parison and sheet work. When compared to a high-stiffness blow molding grade with density 0.956 g/cm³, HD3403S provides a wider processing window for thick-walled articles because the lower density reduces frozen-in stress at pinch-off and improves drop impact at -20°C. However, top-load strength and creep modulus under sustained compression are lower; this limits stack height in filled container warehouses unless sidewall ribbing or denser section design compensates.
Differences in molecular architecture also affect melt fracture behavior. HD3403S exhibits reduced sharkskin onset in unfilled sheet at shear rates below 600 s⁻¹ compared with lower-molecular-weight HDPE grades, but the high-molecular-weight tail can increase backpressure on small-diameter extruders. Production-scale evaluation on a 90 mm grooved-barrel extruder running 400 kg/h shows stable melt pressure when the metering zone is maintained above 195°C; below that temperature, pressure fluctuations of ±15 bar have been observed. These observations are consistent with the broader molecular weight distribution and should be treated as equipment-specific rather than universal.
Compliance with EU 10/2011 for food contact requires migration testing on the finished article, not merely use of an olefin polymer in the scope of FDA 21 CFR 177.1520. The base resin may be listed under relevant positive lists, but the additive package, color masterbatch, and regrind fraction must be reviewed against the specific simulant and time-temperature conditions. Under REACH 1907/2006, a safety data sheet and substance registration do not replace an article-level analysis for candidate list substances. Under RoHS 2011/65/EU, the material is outside the electrical and electronic equipment scope unless incorporated into EEE; however, cadmium, lead, mercury, and hexavalent chromium content should be verified on the finished component if the material is supplied with a color concentrate.
Outdoor service without UV stabilization is not recommended beyond 12 months in temperate climates. For extended weathering, a 2.0–3.0 wt% carbon black masterbatch should be incorporated, and the extrudate should be checked for dispersion using a 100× microscope rather than relying on visual assessment. Avoid combining HD3403S with halogenated flame retardants or strong oxidizing agents at processing temperatures above 220°C because exothermic decomposition can generate localized gel particles. The grade should not be purged with acidic purging compounds at temperatures above 230°C on machines with long residence times. Published data for outdoor weathering of HD3403S in unpigmented sheet are limited; accelerated QUV testing per ASTM G154 cycle 1 should be performed before specifying service life.
