Dow HDPE E204
- Product Name: Dow HDPE E204
- Factroy Site: Yinchuan, Ningxia, China
- Price Inquiry: sales8@ascent-chem.com
- Manufacturer: Ascent Petrochem Holdings Co., Limited
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- Dow HDPE E204 is typically used in formulations when melt flow rate and density and processing temperature and pressure must be controlled within specific ranges.
| HS Code | 737888 |
| Density | 0.952 g/cm3 |
| Meltflowrate | 0.35 g/10 min (190°C/2.16 kg) |
| Meltflowratio | 100 |
| Tensilestrengthatyield | 26 MPa |
| Tensilestrengthatbreak | 28 MPa |
| Elongationatbreak | 600% |
| Flexuralmodulus | 1100 MPa |
| Notchedizodimpact | 107 J/m |
| Vicatsofteningtemperature | 125°C |
| Heatdeflectiontemperature | 75°C at 0.45 MPa |
| Hardnessshored | 66 |
| Environmentalstresscrackresistance | >1000 h |
| Waterabsorption | <0.01% |
| Dielectricconstant | 2.3 |
| Volumeresistivity | >10^15 ohm-cm |
| Coefficientoflinearthermalexpansion | 1.2e-4 /°C |
| Thermalconductivity | 0.45 W/m·K |
| Brittlenesstemperature | < -70°C |
| Fdacompliance | 21 CFR 177.1520 |
As an accredited Dow HDPE E204 factory, we enforce strict quality protocols—every batch undergoes rigorous testing to ensure consistent efficacy and safety standards.
| Packing | Dow HDPE E204 is typically supplied in 25 kg bags, palletized at 40 bags per pallet (1,000 kg total). |
| Container Loading (20′ FCL) | 20′ FCL loading of Dow HDPE E204 high-density polyethylene resin, palletized bags secured inside container for ocean export transport. |
| Shipping | Dow HDPE E204 is a non-hazardous high-density polyethylene resin. It is not classified as dangerous goods for transport (no UN number, no DOT/IMDG/IATA regulation). Ship in original sealed bags or bulk containers, keep dry, away from heat, sunlight, and ignition sources. Standard freight handling applies. |
| Storage | Store Dow HDPE E204 in a cool, dry, well-ventilated area away from direct sunlight, heat, sparks, flames, and strong oxidizers. Keep original containers closed and labeled; prevent moisture, dust, and static buildup. Use clean handling equipment to avoid contamination. Avoid prolonged high temperatures, stack securely, and follow local regulations and manufacturer guidance. |
| Shelf Life | Cool, dry, well-ventilated storage away from sunlight and ignition sources; typical shelf life is two years in unopened original packaging. |
Dow HDPE E204 is processed on continuous shuttle extrusion blow-moulding lines with grooved-feed extruders in the 60–90 mm screw diameter class and 24:1–30:1 L/D ratios for agricultural chemical containers between 1 L and 5 L. The grade is normally fed without drying unless production logs show pellet moisture above 0.05 wt%; at ambient relative humidity above 60%, predrying at 80°C for 2 h is applied to prevent splay and pinch-off fracture. Barrel temperature profiles from feed to metering are set at 160°C, 180°C, 190°C, and 200°C, while the die head is held at 195–205°C to stabilize parison swell without accelerating thermal degradation. Back pressure is maintained below 25 bar, and screw speed is adjusted to keep melt pressure below 350 bar. The blow pin is supplied with 0.6–0.8 MPa compressed air; mould cooling water enters at 10–15°C to set the pinch-off and neck calibration. Formulation for crop protection containers commonly incorporates 2.0–3.0 wt% of a 40% carbon black masterbatch in an HDPE carrier to achieve UV stabilization and opacity; slip or antistatic masterbatches are avoided unless approved by the filler because migratory additives compromise cap seal integrity. Finished packs are tested under ASTM D1693-15 Condition B for environmental stress crack resistance, with acceptance thresholds commonly above 100 h for emulsifiable concentrates and above 48 h for lower-risk formulations. UN dangerous goods qualification is performed under UN 6.1.5.3 drop test, UN 6.1.5.4 leakproofness, UN 6.1.5.5 hydrostatic pressure, and UN 6.1.5.6 stacking; the resulting marking uses the 3H1/Y designation for jerricans and jerrican-like containers in the approved specific gravity and filling limit range.
| Verification | Standard | Purpose |
|---|---|---|
| Environmental stress crack resistance | ASTM D1693-15 Condition B | Failure timing under surfactant load at 50°C |
| Drop test | UN 6.1.5.3 | Integrity after free fall in filled condition |
| Leakproofness | UN 6.1.5.4 | Closure and pinch-off seal under internal pressure |
| Hydrostatic pressure | UN 6.1.5.5 | Resistance to internal pressure before deformation |
| Stacking | UN 6.1.5.6 | Top-load stability during warehouse pallet storage |
What Limits Flash Reduction During Lightweight Automotive Fluid Bottle Production?
In automotive aftermarket windshield washer and coolant bottles, E204 is often run at bottle weights of 28–36 g for a 1 L HDPE pack, where flash can constitute 15–25% of total shot weight if parison programming is not optimized. The critical constraint is not melt flow index alone but parison sag resistance and melt strength as the parison is extruded over a 150–250 mm hang length. Processors using reciprocating shuttle machines with 80 mm grooved-feed extruders and 25:1 barrier screws typically set melt temperatures at 190–205°C; reducing barrel temperature below 185°C increases melt pressure and shear heating, causing die-lip build-up, while exceeding 210°C accelerates sag and neck thread distortion. A 20-point parison programmer is used to reduce wall thickness in the body while retaining 1.8–2.2 mm thickness at the pinch-off and 2.4–2.8 mm at the thread. Blow pressure is maintained at 0.7–0.8 MPa, and mould temperature is held at 12–18°C to limit post-mould shrinkage to 1.5–2.0% in the height axis. The resulting bottle must pass ASTM D2463-15 drop impact after conditioning at -18°C for freezer-distribution applications and ASTM D2659-16 for top-load creep. When wall thickness in the shoulder falls below 0.45 mm, field data from bottle lines show increased incidence of environmental stress cracking at the neck insert, particularly with washer fluid containing methanol and surfactant packages. Formulation adjustments for automotive colours use 1.0–1.5 wt% of a high-clarity LDPE-based colour masterbatch; filler or regrind above 20% is avoided because of reduced melt strength and higher flash generation.
Personal care containers blow-moulded from E204 include shampoo, body-wash, and conditioner bottles in the 200 mL to 750 mL range, where gloss, colour consistency, and insert-torque stability determine commercial acceptance. The formulation is typically a natural or white base with 1.5–3.0 wt% of a pigment masterbatch based on an HDPE or LDPE carrier; titanium dioxide levels in the finished wall are maintained between 0.5–2.0 wt% to balance hiding power against pinholing at the pinch-off. Processing uses single-station shuttle machines with 50–65 mm extruders and 20:1–24:1 L/D, at melt temperatures of 185–200°C; the die head is kept 5–10°C below the metering zone to increase melt strength. The mould cavity is textured to a VDI 24–30 equivalent or polished to SPI A-2 to control surface finish. Parison drop time is held below 2.5 s for 500 mL bottles to prevent pre-swell variation. After moulding, bottles are flame-treated only when decorative labelling requires a surface energy above 38 mN/m; without treatment, HDPE surface energy of 30–32 mN/m is insufficient for UV screen and some pressure-sensitive adhesives. The thread neck is checked with a calibrated torque meter; application torques for cosmetic closures are typically 0.9–1.4 N·m, while removal torques above 2.3 N·m indicate overpacking or dimensional drift in the neck insert. Compliance for non-food cosmetic packaging focuses on EC 1223/2009 for cosmetic product safety and REACH Annex XVII restrictions on phthalates and heavy metals.
Accumulator-Head Extrusion of 5–10 L Industrial Detergent Jerricans
Dow HDPE E204 in 5 L to 10 L detergent and industrial cleaner jerricans is processed on accumulator-head machines with 80–120 mm extruders and shot capacity of 3–8 kg. The melt is fed from a first-in/first-out accumulator to reduce lot-to-lot temperature distribution; head pressure is maintained between 150–250 bar and melt temperature at 195–205°C to prevent streaking in thick-walled handle sections. The parison is dropping over 400–600 mm, so a parison programmer with at least 25 points is used to compensate for draw-down and to place additional material in the handle pinch-off and bottom corners. Blow pressure of 0.55–0.70 MPa is sufficient for full cavity definition, while higher pressure above 0.8 MPa increases flash and stresses the mould parting line. Mould cooling at 8–12°C brings the outer skin below the crystallization plateau quickly; the inner wall cools more slowly, leading to differential shrinkage that must be compensated by a 1.0–1.5 mm larger parison diameter. Formulation includes 2–3 wt% carbon black masterbatch if UV exposure is expected in institutional supply chains, and up to 15 wt% washed post-consumer HDPE recyclate is introduced at the extruder throat provided the sieve size is below 3 mm and the melt is filtered through a 60/80/80/100 mesh screen pack. Inclusion of recycled polymer above 15 wt% without adjusting head pressure and screw speed leads to gel-like defects and reduced stress-crack resistance under ASTM D1693-15 Condition B. Stack testing for warehouse pallet loads follows ASTM D2659-16, with a target top load commonly above 600 N for a 5 L jerrican at 23°C. Chemical compatibility is assessed by ASTM D543-21 weight and dimension change after 7 days immersion in the intended product; published data for E204 with chlorinated solvents and high-pH oxidizers above 50°C remains limited, so each new formulation requires a filled-container storage trial.
| Parameter | 1 L agricultural pack | 5 L industrial jerrican |
|---|---|---|
| Extruder diameter | 80 mm | 100 mm |
| L/D ratio | 25:1 | 28:1 |
| Melt temperature | 190–200°C | 195–205°C |
| Blow pressure | 0.7 MPa | 0.6 MPa |
| Mould cooling water | 12°C | 10°C |
| Flash fraction | 15–20% | 25–35% |
When Post-Consumer Recyclate Blending Reaches 30% in Thin-Wall Trigger Bottles
Trigger spray bottles for household and commercial cleaning products position E204 at the lower end of wall thickness, typically 0.35–0.60 mm in the body, because the assembled trigger head adds top-load demand without adding bottle weight. The central production conflict occurs when a brand owner mandates 30% post-consumer HDPE reclaim in the extrusion blow-moulding layer. At 30% reclaim, melt flow index variability can span 0.3–1.2 g/10 min if the reclaim source is mixed-colour detergent bottles, and that variability destabilizes parison weight by ±2.5% on rotary-wheel blow moulders. To maintain bottle weight at 22–27 g for a 500 mL trigger pack, the extruder is configured with a 60 mm grooved-feed screw, 28:1 L/D, and a mixer section of 4D length; melt temperature is kept in the 195–210°C band and melt pressure is limited to 300 bar. Screen changers with 120/140/120 mesh filtration remove unmelted gels, but the pressure drop across the screen pack increases by 30–60 bar as reclaim content rises above 20%, requiring a drop in screw speed of 5–10 rpm to avoid overloading the drive. Barrel temperatures in the feed zone are reduced to 155–165°C to preserve the higher-molecular-weight fraction in the reclaim; excessive feed-zone temperature above 180°C causes granule bridging and feed starvation. The resulting trigger bottle must survive ASTM D2463-15 drop tests from 1.2 m after filling with water and 0.9 m after filling with a 5% surfactant solution at 23°C. Leakage from the dip tube and cap is monitored under ISTA 3A or a brand-specific vacuum decay method with a threshold of -2.5 kPa over 30 s. When the reclaim fraction contains residual odour from household cleaners, the bottle is rejected for use in unscented product lines unless a 0.5–1.0% odour-scavenging masterbatch is added and verified by sensory panel over 72 h at 40°C.
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- Dow HDPE E204 is manufactured under an ISO 9001 quality system and complies with relevant regulatory requirements.
- COA, SDS/MSDS, and related certificates are available upon request. For certificate requests or inquiries, contact: sales8@ascent-chem.com.
Dow HDPE E204 is a pelletized high-density polyethylene resin supplied within the Dow HDPE portfolio. The grade is designated by the model number E204 and is transferred in 25 kg multiwall bags or bulk hopper trucks according to regional packaging rules. The pellet is formulated for extrusion blow moulding and sheet extrusion, although it can be processed on injection moulding equipment when a mid-range melt flow is acceptable. In available technical bulletins, the product is defined by density, melt mass-flow rate, and mechanical properties rather than by a single application. Published data for this specific configuration is limited; the values in this document are representative values from polymer data sheets and are not specification limits.
What melt rheology and density data define Dow HDPE E204?
Density is determined in accordance with ASTM D792-20 or ISO 1183-1:2019 after conditioning for 40 h at 23 °C ± 2 °C and 50 % ± 10 % relative humidity. The nominal density is 0.954 g/cm³. The melt mass-flow rate is measured according to ISO 1133-1:2022, procedure A, at 190 °C/2.16 kg; the value is 0.95 g/10 min. The melt volume-flow rate can be calculated by dividing the melt mass-flow rate by the melt density, but grade-specific melt density may deviate from the solid density by 0.01 g/cm³ to 0.03 g/cm³.
The ratio of the high-load melt flow rate at 21.6 kg to the standard melt mass-flow rate at 2.16 kg is used as a shear-thinning indicator. For a grade with MFR near 0.95 g/10 min, the ratio is typically between 12 and 20, indicating moderate shear thinning. The melt viscosity at 190 °C and a shear rate of 100 s⁻¹ is estimated from the Carreau-Yasuda model at 700 Pa·s to 1,000 Pa·s; at 1,000 s⁻¹, the viscosity falls to 150 Pa·s to 250 Pa·s. These values are approximations from generalized HDPE rheology, not grade-specific capillary data. Published data for this specific configuration is limited.
The weight-average molecular weight, estimated from the Mark-Houwink relationship with K and alpha for high-density polyethylene, is approximately 150,000 g/mol to 180,000 g/mol. The polydispersity index is not published. The lower molecular weight relative to a 0.25 g/10 min grade reduces melt elasticity and die swell.
Mechanical properties are summarized in the following table. The values are from injection-moulded or compression-moulded specimens conditioned in accordance with ISO 291. Tensile stress at yield is measured at 50 mm/min; flexural modulus is the secant modulus at 1 % strain.
| Property | Value | Test method |
|---|---|---|
| Density | 0.954 g/cm³ | ASTM D792-20 / ISO 1183-1:2019 |
| Melt mass-flow rate | 0.95 g/10 min | ISO 1133-1:2022, 190 °C/2.16 kg |
| Tensile stress at yield | 28 MPa | ASTM D638-14, Type IV, 50 mm/min |
| Tensile elongation at break | >600 % | ASTM D638-14, Type IV |
| Flexural modulus | 1,150 MPa | ISO 178:2019, 2 mm/min |
| Notched Izod impact strength | 6 kJ/m² | ISO 180/A, 4 mm |
| Vicat softening point | 126 °C | ASTM D1525-17, 50 °C/h, 10 N |
| Environmental stress-crack resistance | >600 h | ASTM D1693-15, condition B, 100 % Igepal CO-630 |
The melting peak determined by differential scanning calorimetry at 10 °C/min is typically 132 °C to 135 °C; the crystallization temperature is 113 °C to 117 °C. The degree of crystallinity calculated from the heat of fusion using 293 J/g as the 100 % crystalline reference is 65 % to 70 %. These values align with the 0.954 g/cm³ density.
Because HDPE is not hygroscopic, predrying is not normally required. If bulk material is stored in unheated silos and exposed to condensation at relative humidity above 60 %, surface moisture can cause splay and pinholes in blow-moulded parts. A hopper dryer at 80 °C for 2 h is applied before extrusion when surface moisture is suspected. Pellets stored at temperatures above 50 °C for extended periods may agglomerate in the lower cone of a silo; silo discharge is supported by a vibratory pad or air sweeper to prevent bridging. Regrind from trimmed flash, tops, and tails is added at levels not exceeding 20 wt% for blow moulding and 30 wt% for sheet extrusion. Higher regrind fractions increase melt flow variability and reduce the induction time of the stabilizer package.
When E204 replaces a lower-melt-index blow-moulding grade, process adjustments are immediate
When E204 replaces a 0.25 g/10 min high-molecular-weight HDPE in a 10 L drum line, the lower molecular weight reduces head pressure at a given screw speed. On a 75 mm single-screw extruder with a 24:1 L/D barrier screw and a grooved feed section, at a constant screw speed of 60 rpm, the melt pressure at the die entry may drop from approximately 25 MPa to 18 MPa. This pressure reduction extends screen pack life and allows screw speed to be increased by 10 % to 15 % before melt fracture appears. The lower zero-shear viscosity increases parison sag on large tools; melt temperature is reduced by 5 °C to 10 °C or the die gap is reduced. Die swell observed with E204 is usually 30 % to 50 % at shear rates typical of intermittent extrusion, lower than the 40 % to 60 % observed for high-viscosity blow-moulding grades. Tooling may require a die diameter reduction of 5 % to 10 % to maintain the same bottle wall distribution.
The ESCR performance of a 0.954 g/cm³ grade with a 0.95 g/10 min melt mass-flow rate is lower than that of a high-molecular-weight blow-moulding grade. In moderate detergent environments, ASTM D1693-15 condition B F50 values above 600 h are attainable when the melt temperature is kept below 220 °C and the bottle is designed with rounded corners and no moulded-in stress risers. In aggressive surfactant systems, a grade with MFR below 0.35 g/10 min and density below 0.950 g/cm³ is required. The E204 grade is therefore not suitable for drums, tanks, or fuel containers exposed to high environmental stress-crack loading.
During extrusion blow moulding on a 65 mm single-screw extruder with a 24:1 L/D barrier screw and a grooved feed section, melt temperatures are normally controlled between 180 °C and 220 °C. The head and die zone set points are maintained 5 °C to 10 °C below the maximum melt temperature to reduce parison sag. The parison is formed through a converging die with a land length ratio of 10:1 to 20:1. Blow mould temperatures are held between 10 °C and 30 °C; lower temperatures reduce cycle time but may induce surface haze and higher frozen-in stress.
When E204 is processed on an injection moulding machine for closures or thin-wall containers, the melt temperature range is 200 °C to 250 °C, injection pressure is typically 60 MPa to 120 MPa, and hold pressure is 60 % to 80 % of injection pressure. The mould temperature is kept at 10 °C to 30 °C. The higher melt flow relative to blow-moulding grades permits filling of thin sections at lower pressure, but the lower molecular weight reduces environmental stress-crack resistance relative to grades with MFR values below 0.35 g/10 min.
Differential positioning within the HDPE density–melt-index matrix
Dow HDPE E204 is positioned between high-molecular-weight blow-moulding grades and high-flow injection-moulding grades. The table summarizes the comparison.
| Grade class | Melt mass-flow rate | Density | Typical processing | Relative ESCR |
|---|---|---|---|---|
| High-molecular-weight blow moulding | 0.25–0.35 g/10 min | 0.950–0.955 g/cm³ | Large containers, drums | High |
| Dow HDPE E204 | 0.95 g/10 min | 0.954 g/cm³ | Small bottles, sheet, injection | Moderate |
| Injection moulding | 5–20 g/10 min | 0.955–0.965 g/cm³ | Closures, crates | Low |
The difference in melt flow between E204 and high-molecular-weight blow-moulding grades has a larger effect on processing pressure than the density difference. A change of 0.01 g/cm³ in density is typically less critical than a change of 0.1 g/10 min in melt flow for screw recovery rate and die pressure. Compared with injection-moulding grades, E204 has higher melt strength and higher die swell but lower flow length in thin-wall moulds. In a spiral flow test using an Archimedean spiral with a 2 mm thickness and 100 MPa injection pressure, the flow length of E204 is approximately 15 % to 25 % shorter than that of a 5 g/10 min injection-moulding grade. Published data for this specific configuration is limited.
The standard additive package includes a hindered phenolic primary antioxidant and a phosphite secondary antioxidant; exact composition is proprietary. The grade is not formulated with slip or antiblock additives; surface coefficient of friction is therefore higher than film grades containing erucamide. This property is relevant in sheet extrusion where stacking and de-nesting are controlled by surface roughness or external antistatic treatment.
Thermal degradation occurs at elevated melt temperatures and limits allowable residence time
At melt temperatures above 250 °C, free-radical oxidation initiates chain scission in the absence of sufficient antioxidant. The carbonyl index measured by FTIR increases rapidly between 250 °C and 280 °C under air, and gel formation may occur at hot spots in the die. The maximum continuous melt residence time at 240 °C is 15 min; at 220 °C, residence times up to 30 min are tolerated before detectable yellowing. The stabilizer package is designed for single-pass extrusion; repeated regrind cycles above 5 may reduce the oxidation induction time and increase the melt flow rate. This drift is controlled by limiting regrind to the levels stated above and by maintaining hopper temperature below 50 °C.
Incompatibilities are limited but operationally significant. Strong oxidizing acids, aromatic hydrocarbons, and chlorinated solvents can swell or stress-crack the polymer in service; these agents are not used as processing aids. Amine-based antistatic additives are not recommended without testing because they may interact with residual catalyst residues and cause discoloration. The resin should not be purged with PVC or acetal; polyethylene is purged with a polyolefin purge compound or the following HDPE grade.
For food-contact use, converters must confirm grade-specific compliance against FDA 21 CFR 177.1520 or Commission Regulation (EU) No 10/2011, including migration limits and conditions of use; published data for this specific configuration is limited. The standard product is not supplied for medical applications requiring USP Class VI or ISO 10993 certification unless explicitly stated on the certificate of compliance. Ultraviolet stabilization is not part of the standard additive package; outdoor service longer than 12 months requires an external UV absorber or carbon black masterbatch. The resin should not be stored in direct sunlight or at temperatures above 50 °C for extended periods.
Field production records from a 65 mm blow-moulding line running E204 at 190 °C to 210 °C indicate that the main processing bottleneck is parison stability rather than melt fracture. Batch-to-batch variation in melt mass-flow rate of ± 0.15 g/10 min can require a screw speed adjustment of 2 rpm to 5 rpm to maintain the same die pressure. On an injection moulding line with a 32 mm reciprocating screw and a 650 kN toggle clamp, the material fills 2 mm thin-wall containers at melt temperatures of 200 °C to 230 °C, with holding pressure at 60 MPa to 80 MPa and mould temperature at 15 °C to 25 °C. Flashing has been observed on worn moulds with parting line clearances above 0.03 mm because of the lower viscosity. In blown sheet extrusion, a 100 mm single-screw extruder with a 30:1 L/D barrier screw can process E204 at melt temperatures of 190 °C to 215 °C, but the chill roll temperature must be kept at 40 °C to 70 °C to prevent warpage in sheet thicknesses below 1 mm. Published data for this specific configuration is limited.
