Dow HDPE DGDJ-3485
- Product Name: Dow HDPE DGDJ-3485
- Factroy Site: Yinchuan, Ningxia, China
- Price Inquiry: sales8@ascent-chem.com
- Manufacturer: Ascent Petrochem Holdings Co., Limited
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- Dow HDPE DGDJ-3485 is typically used in formulations when melt flow index and density and processing melt temperature and die pressure must be controlled within specific ranges.
| HS Code | 814100 |
| Density | 0.948 g/cm3 |
| Melt Index 190 C 2 16 Kg | 0.35 g/10 min |
| Tensile Strength At Yield | 24 MPa |
| Tensile Strength At Break | 31 MPa |
| Elongation At Break | >600 % |
| Flexural Modulus | 1100 MPa |
| Vicat Softening Temperature | 125 °C |
| Brittleness Temperature | < -70 °C |
| Environmental Stress Crack Resistance Escr | >1000 h |
| Hardness Shore D | 60 |
| Thermal Conductivity | 0.35 W/m-K |
| Specific Heat Capacity | 1.9 J/g-°C |
| Water Absorption | 0.01 % |
| Dielectric Constant | 2.3 |
| Volume Resistivity | >1E15 ohm-cm |
| Melting Point | 130 °C |
| Coefficient Of Linear Thermal Expansion | 1.2E-4 /°C |
| Mold Shrinkage | 1.5-3.0 % |
As an accredited Dow HDPE DGDJ-3485 factory, we enforce strict quality protocols—every batch undergoes rigorous testing to ensure consistent efficacy and safety standards.
| Packing | Dow HDPE DGDJ-3485 is packaged in 25 kg bags, typically palletized and shrink-wrapped for transport and storage. |
| Container Loading (20′ FCL) | 20′ FCL loaded with 25 kg bags of Dow HDPE DGDJ-3485, palletized, shrink-wrapped, and securely braced for ocean freight. |
| Shipping | Dow HDPE DGDJ-3485 is shipped as non-hazardous high-density polyethylene pellets in 25 kg bags, bulk bags, or bulk trucks/railcars. Keep dry and avoid excessive heat, moisture, UV, and ignition sources. It is not DOT/IMDG regulated; follow local transport and storage regulations. |
| Storage | Store Dow HDPE DGDJ-3485 in a cool, dry, well-ventilated area away from direct sunlight, heat, sparks, and open flames. Keep containers or bags sealed to prevent moisture, dust, and contamination. Avoid prolonged UV exposure and temperatures above recommended limits. Stack pallets securely on a clean, dry surface. Use appropriate housekeeping to control dust and static. Consult SDS for specific requirements. |
| Shelf Life | Dow HDPE DGDJ-3485 has no specific shelf life; store sealed in a cool, dry, well-ventilated area away from sunlight. |
Extrusion blow molding of stackable UN-certified jerrycans from DGDJ-3485 places simultaneous demands on parison sag control, environmental stress crack resistance, and low-temperature drop performance at -18°C. Supplier technical literature lists nominal density at 0.948 g/cm³ (ISO 1183-1:2019) and melt flow rate at 0.35 g/10 min (ISO 1133-1:2022, 190°C/2.16 kg), placing the grade in the high-molecular-weight blow-molding band where parison hang-time is enhanced but screw torque rises on smaller extruders. Compliance for this package class follows the UN Model Regulations design type UN 3H1 for seamless rigid plastics packaging under ADR/RID/IMDG provisions; the container must pass hydraulic pressure, stacking, leakproofness, and drop tests after conditioning with filling liquids that may reach specific gravity 1.8 for higher package groups. Resin acceptance in converter specifications is anchored to ASTM D1693-21 for environmental stress crack resistance in 100% Igepal CO-630; a no-failure criterion at 500 h or 1000 h is common in industrial purchasing contracts, though published data for this specific container configuration is limited and must be validated per formulation. The compound uses DGDJ-3485 at 95.5–97.0 wt%, a 50% carbon black LLDPE carrier masterbatch at 2.5–3.5 wt%, a phenolic-phosphite antioxidant masterbatch at 0.2–0.4 wt%, and a fluoroelastomer-free process aid at 0.1–0.3 wt%; pigment loading above 4.0 wt% is not used because it depresses ESCR and raises low-temperature brittleness. Downstream, the compound is fed to accumulator-head EBM machines with screw diameters 80–120 mm, L/D 24:1–30:1, melt temperatures 180–205°C, die gap 2.5–4.0 mm, parison programming wall thickness 1.2–2.5 mm, mold cooling at 8–15°C, and blow pressure 0.8–1.0 MPa. The terminal articles are 5–60 L stackable jerrycans marked with UN certification for liquid chemicals, adhesives, cleaning intermediates, and agricultural adjuvants.
Does the ESCR envelope of DGDJ-3485 extend to agrochemical multi-layer containers?
Coextruded HDPE/EVOH/HDPE containers for emulsifiable concentrates and suspension concentrates use DGDJ-3485 as the structural layer because the melt strength permits layer stability across a six-layer die with a 20–30% regrind stream. Regulatory compliance for such containers in the United States falls under 40 CFR Part 165 for pesticide container design and labelled instructions, while transport of certain concentrate formulations requires the UN 3H1 design type when classified under the UN Model Regulations; packaging heavy-metal limits are verified against 94/62/EC and REACH Annex XVII restrictions. The structural layer formulation contains DGDJ-3485 at 94.0–96.0 wt%, carbon black masterbatch at 2.5–4.0 wt%, a hindered amine light stabiliser masterbatch at 0.3–0.8 wt%, and a phenolic-phosphite antioxidant system at 0.2–0.5 wt%; EVOH is used at 3–5 wt% of the total parison, with tie-layer resins at 2–3 wt%, and the remainder is in-plant regrind not exceeding 25 wt% to avoid gel accumulation. Processing runs on six-layer accumulator-head machines with screw diameter 60–90 mm, barrel temperature profiles 160–200°C, die temperature 190–210°C, and die gap 2.0–3.5 mm; layer sequencing from structural HDPE to tie to EVOH requires a viscosity ratio within 0.9–1.2 at shear rates 50–200 s⁻¹ to avoid flow instability. Terminal articles are 0.5–20 L agrochemical bottles and jerrycans for herbicides, insecticides, fungicides, and adjuvants.
Where high-output shuttle blow-molding lines dominate detergent bottle manufacture, DGDJ-3485 is compounded to maintain melt strength while minimising downstream swell variations. Compliance for these non-food household chemical packages draws primarily on the EU Detergents Regulation (EC) No 648/2004 only where product labelling is concerned, while polymer food-contact status may still be declared under FDA 21 CFR 177.1520(c) 3.1 when dual-use bottles are required; for export shipments, current REACH annex XVII entries and heavy-metal limits under EU Directive 94/62/EC on packaging and packaging waste are applied. The compound uses DGDJ-3485 at 96.0–98.0 wt%, a colour masterbatch in PE carrier at 1.5–3.5 wt%, a phenolic antioxidant at 0.2–0.4 wt%, and a slip/antiblock combination at 0.1–0.3 wt%; no external lubricant is added because it can transfer to the closure sealing surface and interfere with torque retention. On shuttle or wheel machines with single screws of 45–70 mm, L/D 24:1–28:1, melt temperatures of 170–200°C, and mould chiller water at 10–15°C, parison swell is held within a ±2.5% diameter tolerance. Terminal output is 250 mL–5 L HDPE bottles for laundry liquids, fabric softeners, surface cleaners, and rinse aids.
| Application segment | Primary standard or code | Critical test or condition |
|---|---|---|
| UN 3H1 industrial jerrycans | UN 3H1, ADR/RID/IMDG | Drop, stacking, hydraulic pressure, leakproofness |
| Agrochemical multi-layer bottles | 40 CFR Part 165, UN 3H1, 94/62/EC | Compatibility with solvent-based concentrates and regrind control |
| Household detergent bottles | EC No 648/2004, FDA 21 CFR 177.1520(c) 3.1 | Closure torque retention and parison swell control |
| Automotive lubricant bottles | ISO 12048, UN 3H1 where classified | Top-load yield and heated storage mass loss |
| Potable water cooler bottles | FDA 21 CFR 177.1520(c) 3.1, EU (EC) No 10/2011 | Aqueous migration and repeated caustic wash cycles |
| Industrial cleaning fluid containers | ASTM D5276-19, ASTM D1693-21, ISTA 3A | Frozen drop at -18°C and oxidative degradation resistance |
When top-load and vapour loss limits define automotive lubricant bottle specifications
Automotive lubricant bottles made from DGDJ-3485 must satisfy two process-property bands simultaneously: sufficient top-load strength when stacked in modular distribution systems, and low mass loss when the package is heated during storage in industrial sheds. The top-load criterion is measured per ISO 12048 with a compression tester speed of 10 mm/min; a 1 L bottle typically requires a yield stress above 260 N before buckling, though published data for this exact grade is limited and should be validated per container geometry. The material side uses DGDJ-3485 at 95.0–96.5 wt%, carbon black or carbon black-plus-blue masterbatch at 3.0–4.0 wt%, phenolic antioxidant at 0.2–0.4 wt%, and optional processing aid at 0.1–0.3 wt%; the formulation avoids calcium carbonate because it reduces weld-line impact resistance in handle pinch-offs. Downstream, continuous or accumulator-head blow-molding machines with screws 65–110 mm, L/D 24:1–30:1, melt temperatures 185–205°C, mold chiller 8–14°C, and blow pressure 0.7–0.9 MPa are used; parison programming is set to maintain a squared bottom corner radius above 4 mm to reduce stress cracking at the pinch seam. Terminal articles are 1–20 L bottles for engine oils, gear lubricants, automatic transmission fluids, and antifreeze/coolants.
In refillable cooler-bottle applications, DGDJ-3485 replaces polycarbonate in 5–20 L cooler bottles where hydrolytic stability and repeated washing cycles under caustic conditions are required. For food-contact status, the neat resin can be listed under FDA 21 CFR 177.1520(c) 3.1 for olefin polymers in contact with aqueous foods, while migration testing follows EU (EC) No 10/2011 with aqueous simulants 10% ethanol, 3% acetic acid, and 20% ethanol depending on the intended contact time. The formulation uses DGDJ-3485 at 97.0–98.5 wt%, blue colour masterbatch at 1.5–2.5 wt%, and a hindered phenol antioxidant at 0.2–0.3 wt%; process aids and fluorinated polymer additives are excluded to reduce total organic carbon release into the stored water. Processing on shuttle-type blow-molding machines with screws 50–80 mm and melt temperatures 175–200°C is accompanied by mould cooling at 8–16°C; the pinch-off is inspected under 10x magnification because incomplete welding creates biofilm-prone crevices in returned bottle cleaning cycles. Terminal products are 5–20 L refillable HDPE water cooler bottles and reusable water dispensing containers.
| Segment | DGDJ-3485 loading | Masterbatch/additive loading | Melt temperature | Typical wall thickness |
|---|---|---|---|---|
| Industrial jerrycan | 95.5–97.0 wt% | 3.0–4.0 wt% carbon black/antioxidant/process aid | 180–205°C | 1.2–2.5 mm |
| Agrochemical multilayer bottle | 94.0–96.0 wt% in structural layer | 3.0–5.7 wt% carbon black/UV/antioxidant | 190–210°C | 0.6–1.5 mm |
| Household detergent bottle | 96.0–98.0 wt% | 1.5–3.5 wt% colour masterbatch | 170–200°C | 0.4–1.2 mm |
| Automotive lubricant bottle | 95.0–96.5 wt% | 3.0–4.3 wt% carbon black/antioxidant/process aid | 185–205°C | 0.8–2.0 mm |
| Potable water cooler bottle | 97.0–98.5 wt% | 1.5–2.8 wt% blue masterbatch/antioxidant | 175–200°C | 0.8–1.8 mm |
| Industrial cleaning fluid container | 94.5–96.5 wt% | 2.8–4.5 wt% carbon black/antioxidant/PE wax | 180–205°C | 1.0–2.4 mm |
Low-Temperature Drop Impact Arcs in Industrial Cleaning Fluid Containers
Because industrial cleaning fluid containers are exposed to aggressive alkaline cleaners, oxidising agents, and sudden temperature drops in transit, low-temperature impact resistance is the primary design constraint. The product is tested for drop after conditioning at -18°C for 24 h according to ISTA 3A and ASTM D5276-19 free-fall drop, while environmental stress crack resistance is evaluated in 10% NaOH at 50°C and 100% Igepal CO-630 under ASTM D1693-21; containers holding oxidative pre-treatment solutions are additionally checked for peroxide-induced degradation by melt-flow retention after 30 days at 40°C. The blend uses DGDJ-3485 at 94.5–96.5 wt%, carbon black masterbatch at 2.5–4.0 wt%, antioxidant masterbatch at 0.2–0.5 wt%, and a polyethylene wax at 0.1–0.3 wt% to lower screw torque in colder plant environments; fillers are omitted because they increase density beyond the 0.948–0.952 g/cm³ window and reduce weld-line elongation. Downstream, accumulator-head machines with screw diameters 80–100 mm, L/D 24:1–28:1, melt temperatures 180–205°C, and drop-pressure parison programming at 0.8–1.0 MPa are used to produce 5–25 L containers for hypochlorite-based cleaners, acidic descalers, and alkaline degreasers.
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- Dow HDPE DGDJ-3485 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 DGDJ-3485 is a pelletized high-density polyethylene copolymer intended for intermittent extrusion blow molding of rigid containers. The grade is supplied under the designation DGDJ-3485 Natural 7 and is based on a hexene-1 comonomer architecture that increases tie-molecule formation between crystalline lamellae. Manufacturer-published representative values include a density of 0.948 g/cm³ measured according to ASTM D1505 and a melt index of 0.35 g/10 min at 190°C/2.16 kg according to ASTM D1238. The melt index places the resin in the low-flow blow molding range, where high molecular weight contributes to parison hang strength and pinch-off weld integrity on large industrial containers.
| Property | Test Method | Representative Value |
|---|---|---|
| Melt index, 190°C/2.16 kg | ASTM D1238 | 0.35 g/10 min |
| Density | ASTM D1505 | 0.948 g/cm³ |
| Tensile strength at yield, 50 mm/min | ASTM D638 | 26 MPa |
| Elongation at break | ASTM D638 | 600% |
| Flexural modulus | ASTM D790 | 1100 MPa |
| Environmental stress crack resistance, 100% Igepal CO-630, Condition B | ASTM D1693 | >1000 h |
| Vicat softening point | ASTM D1525 | 124°C |
| Brittleness temperature | ASTM D746 | <-75°C |
These values are supplied for lot-to-lot comparison and are not intended as a product specification. Conversion lot release is typically controlled through melt index and density within the manufacturer’s release limits. On production-scale shuttle blow molding machines with 80 mm barrier screws and 24:1 L/D extruders, the shear sensitivity of this melt index class permits stable wall-thickness control when parison programming is combined with consistent melt pressure at the die head.
What Limits the Extrusion Blow Molding Processing Window?
The practical processing range for DGDJ-3485 in accumulator-head blow molding is bounded by parison sag at the upper temperature limit and melt fracture at the lower limit. On a 70 mm extruder with a 24:1 L/D barrier screw and rounded crosshead tooling, melt temperatures between 190°C and 220°C are commonly used. At melt temperatures above 220°C, a 0.35 g/10 min resin can exhibit excessive drawdown on containers above 2 L capacity, producing thinning near the shoulder and at the pinch-off. At temperatures below 180°C, the same melt index class may generate sharkskin on the parison at high output rates because wall shear stress exceeds the critical value for melt fracture.
Die swell is controlled by die land length, die gap, and blow-up ratio. Blow-up ratios of 2.0:1 to 3.0:1 are typical for handled industrial container shapes. Accumulator-head machines with programmable parison profiles compensate for swell differences between the handle region and the sidewall. Mold surface temperature is maintained at 10°C to 30°C with turbulent chilled water. Higher mold temperatures reduce post-mold shrinkage but extend cycle time, while lower temperatures may increase surface gloss but promote surface defects if the mold is not vented adequately.
Agricultural chemical packaging is one of the highest-demand service environments for this resin. Containers molded from DGDJ-3485 are used for emulsifiable concentrates, oil-based formulations, and industrial cleaning agents where top-load strength, drop impact after conditioning, and environmental stress crack resistance are simultaneous requirements. The hexene-1 comonomer shortens average ethylene sequence length and increases the concentration of load-bearing tie molecules between lamellae. The representative environmental stress crack resistance under ASTM D1693, Condition B, 100% Igepal CO-630 is >1000 h. This value is a comparative ranking rather than a direct service-life prediction. Field failure also depends on wall-thickness distribution, processing-induced orientation, closure torque, chemical exposure temperature, and finished container design.
Processors report that acceptable pinch-off weld strength on 5 L to 25 L handled containers is obtained when the parison programmer applies a 25% to 35% wall-thickness boost at the pinch-off zone. Batch-to-batch variance on twin-station shuttle machines is minimized by keeping regrind ratios at or below 20% and by avoiding incompatible color concentrate carriers. Polyethylene-compatible masterbatches are preferred because incompatible carriers such as nylon or polybutylene terephthalate can create delamination at the parison weld.
If Aggressive Chemical Environments Demand Stress-Crack Resistance
Compared with higher-density homopolymer blow molding grades, DGDJ-3485 provides a lower flexural modulus but substantially higher environmental stress crack resistance. In a 0.954 g/cm³ homopolymer with a similar melt index, environmental stress crack resistance under the same ASTM D1693 condition is frequently below 50 h. The trade-off is a reduction in top-load stiffness. Where stack strength is the primary failure mode, a higher-density homopolymer may be preferred. Conversely, when aggressive liquid formulations produce stress cracking in homopolymer bottles, DGDJ-3485 is specified because the copolymer architecture delays crack propagation through the amorphous tie-molecule network.
The low melt index of 0.35 g/10 min also distinguishes DGDJ-3485 from general-purpose injection molding high-density polyethylene grades, which commonly range from 5 g/10 min to 20 g/10 min. Injection molding of thick-wall structural parts is possible only with high fill speeds, multiple gates, and extended hold times. Published data for this specific configuration is limited, and the resin should not be specified for thin-wall injection molding applications where melt index below 1 g/10 min increases filling pressure and the risk of short shots.
Distinguishing the Hexene Copolymer Architecture from Homopolymer Blow Molding Resins
The hexene-1 comonomer in DGDJ-3485 introduces short-chain branches that reduce lamellar thickness and shift the crystalline fraction. The density of 0.948 g/cm³ is lower than that of a homopolymer blow molding grade, and this difference is directly related to the comonomer content. In contrast, a 0.954 g/cm³ homopolymer achieves higher flexural modulus but has lower stress-crack resistance because the thicker lamellae and reduced tie-molecule population permit faster crack initiation in the presence of polar organic surfactants. The molecular weight distribution of DGDJ-3485 is controlled to balance shear thinning during extrusion with parison melt strength during mold closing. The exact polydispersity index is not specified in the manufacturer’s public data, but the low melt index indicates a high weight-average molecular weight relative to film or injection molding grades.
For dry blending and regrind reuse, high-density polyethylene absorbs less than 0.01% moisture at 23°C and 50% relative humidity. Pre-drying is not required under normal indoor storage. If pellets are stored in unheated warehouses and then transferred to a warm molding area, surface condensation can occur above 60% relative humidity. In such cases, a dry-air hopper purge at 70°C for 1 h to 2 h removes surface moisture and prevents splay or bubble defects. Regrind from trimmed flash and rejected containers may be reintroduced up to 20% to 30% by weight in non-food industrial packaging without measurable loss of stress-crack resistance, provided the regrind is free of dirt, oil, and multiple heat-history degradation products.
Compliance statements require verification for the specific finished article and additive package. The base resin may be considered for applications requiring olefin polymer compliance under 21 CFR 177.1520 when the final article’s conditions of use and colorant system are confirmed with the manufacturer. REACH status for the product as supplied is the responsibility of the supplier, and downstream converters must verify SVHC content for the specific lot. Downgauging below the minimum wall thickness established for the container should not be attempted without repeat drop-impact and top-load testing on production samples because the stress-crack resistance alone does not compensate for excessive orientation or insufficient wall thickness in high-temperature chemical storage.
Outdoor storage of containers molded from DGDJ-3485 requires ultraviolet stabilization. The natural resin does not contain a sufficient UV stabilizer package for prolonged direct sunlight exposure. Concentrated oxidizing acids, high-aromatic hydrocarbon solvents at elevated temperature, and long-term contact with strong surfactants can reduce service life. Containers should be tested with the intended chemical formulation at 40°C or at the maximum expected storage temperature for a minimum of 6 months before commercial release. Field data from agricultural chemical packaging lines indicate that stress-crack failures are most often associated with insufficient pinch-off thickness, not with resin deficiency. Therefore, the processing window and mold design are critical control points for maintaining the resin’s inherent stress-crack resistance.
