| HS Code | 639937 |
| Density | 0.959 g/cm³ |
| Melt Index 190 C 2 16 Kg | 0.45 g/10 min |
| Environmental Stress Crack Resistance Escr | >1000 h |
| Tensile Strength At Yield | 31 MPa |
| Tensile Elongation At Break | >600% |
| Flexural Modulus | 1500 MPa |
| Vicat Softening Temperature | 127 °C |
| Heat Deflection Temperature | 75 °C |
| Shore D Hardness | 66 |
| Notched Izod Impact Strength | 80 J/m |
| Melting Point | 134 °C |
As an accredited High Density Polyethylene HDPE DGDA-6094 factory, we enforce strict quality protocols—every batch undergoes rigorous testing to ensure consistent efficacy and safety standards.
| Packing | High Density Polyethylene HDPE DGDA-6094 is supplied in 25 kg sealed polyethylene bags, palletized for industrial transport and storage. |
| Container Loading (20′ FCL) | Loaded in a 20-foot FCL container, High Density Polyethylene HDPE DGDA-6094 in 25kg bags, palletized and securely stowed for shipment. |
| Shipping | High Density Polyethylene HDPE DGDA-6094 is shipped as a non-hazardous solid resin in pellets, typically in 25 kg bags, octabins, or bulk trucks/containers. Store in a cool, dry, clean area away from ignition sources; protect packaging from moisture and contamination. Follow the SDS and local transport regulations. |
| Storage | Store High Density Polyethylene DGDA-6094 in a cool, dry, well-ventilated area away from direct sunlight, heat, ignition sources, and strong oxidizers. Keep containers closed and labeled; prevent moisture pickup and dust generation. Use appropriate spill containment and avoid environmental release. Follow local regulations and the manufacturer’s safety data sheet for specific handling and storage requirements. |
| Shelf Life | Shelf life: typically two years from manufacture when stored sealed in a cool, dry, well-ventilated area away from sunlight. |
Extrusion blow molding of UN-certified tight-head jerrycans in 25 L and 30 L formats relies on the high-melt-strength branching behavior of DGDA-6094 to control parison drawdown between die exit and mold clamping. On a single-station shuttle machine equipped with a 75 mm grooved-barrel extruder and accumulator head, the parison for a 25 L jerrycan is typically dropped with a shot weight of 1.2–1.8 kg at a die gap of 8–14 mm; the head and die are maintained at 190–210 °C to keep extrudate swell stable while avoiding melt fracture of the high-viscosity stream. The high-load melt index of 6.5 g/10 min under ASTM D1238-20 at 190 °C and 21.6 kg permits accumulator prefill without excessive back pressure, and the melt stiffness reduces thickness variation in the flash pocket and pinch-off zones. Mold temperature is held at 18–30 °C, and blowing air pressure is set from 0.55 MPa to 0.80 MPa; the resulting container is qualified as a UN 1H1 tight-head package under 49 CFR 178.504 drop and stack provisions. The terminal article is used for corrosive and solvent-borne industrial liquids, with closure torque retention and weld-line burst pressure verified on each production lot through a 100 kPa internal hydraulic test.
| Test method | Test condition | Qualification relevance for DGDA-6094 packaging |
|---|---|---|
| ASTM D1238-20 | 190 °C, 21.6 kg | Defines parison sag resistance and accumulator fill time |
| ASTM D1693-15 | Condition B, 100 % Igepal CO-630, 50 °C | Differentiates stress-crack resistance in agricultural and detergent containers |
| ASTM D638-14 | Type IV specimen, 50 mm/min | Verifies tensile yield and elongation in pinch-off weld sections |
| ASTM D1998-21 | Upright polyethylene tank hydrostatic test | Controls long-term hoop stress design in large water treatment tanks |
Immersion of blow molded agricultural chemical bottles in xylene-containing emulsifiable concentrates accelerates environmental stress cracking through localized solvent adsorption at the parison pinch-off line. DGDA-6094 is specified where the application qualification requires failure time beyond 600 h under ASTM D1693-15 Condition B with 100 % Igepal CO-630 at 50 °C, because the high-molecular-weight tail resists slow crack growth along oriented weld lines. The extrusion blow molding formulation for a 1 L agrochemical container normally uses 0.10–0.25 wt% hindered phenolic antioxidant and 0.10–0.20 wt% phosphite secondary antioxidant, with carbon black masterbatch added at 1.5–2.5 wt% to produce an opaque UV-shielded wall. The bottle is processed on a continuous shuttle with a blow ratio of 2.5:1 to 3.0:1; neck finish dimensional stability after top-load testing to ISO 8317:2015 is maintained by a post-mold cooling fixture operated at 4–10 °C for 10–15 s. Post-industrial regrind from the same lot is limited to 20 wt% maximum as a production control; the exact ESCR shift for mixed aromatic/ester agrochemical formulations at 40 °C is formulation-specific, and published data for this specific configuration is limited, so each concentrated mixture is screened by ASTM D543-21 immersion before full production. The terminal bottle is tested to the UN 1H1 limited-quantity provisions of IMDG Code Chapter 6.1 for inner packaging compatibility with agrochemical active ingredients.
After the DGDA-6094 parison is inflated against the cavity, the inner surface of the container can be exposed to fluorine gas at 0.5–2.0 % concentration in nitrogen for 1–10 min; the treatment converts surface polyethylene chains into a fluorocarbon barrier with a depth of 5–20 µm, reducing aromatic solvent permeation by roughly two orders of magnitude relative to untreated HDPE. The blow molded wall for a 500 mL solvent container is held between 0.6 mm and 1.1 mm; sidewall thickness below 0.6 mm yields faster barrier formation but reduces top-load stiffness below the required 250 N when tested on a calibrated compression tester at 10 mm/min crosshead speed. The density of DGDA-6094 near 0.953 g/cm³ under ASTM D792 provides higher modulus than lower-density HDPE grades, yet post-fluorination elongation at break must not fall below 400 % when measured on Type IV specimens according to ASTM D638-14 at 23 °C. The terminal container is qualified under UN 3H1 for inward- and outward-facing dangerous goods, and the fluorination line must be operated under closed-loop fluorine recovery to meet workplace exposure limits of 1 ppm for fluorine. The process is used for toluene, xylene, and chlorinated solvent formulations that cannot be packed in untreated HDPE without unacceptable permeation loss.
Automotive windshield washer reservoirs and coolant expansion tanks are produced by suction blow molding from DGDA-6094 and are qualified to endurance cycles that alternate 1,000 h between −40 °C and 110 °C at the fluid interface. Nominal wall thickness is 1.5–3.0 mm, blow mold cores are chilled to 10–20 °C, and blowing air is applied at 0.4–0.7 MPa to reduce cycle time without inducing internal voids at the heat-stake bosses. The flexural modulus, measured by ASTM D790-17 at 1.3 mm/min, requires rib geometries that distribute clamp load and avoid low-cycle fatigue cracking around brass insert bosses. Insert retention torque is checked after a thermal shock sequence from 120 °C to −20 °C; stress cracking at the insert is controlled by limiting insert upset to 1.5 mm and maintaining corner radii above 0.5 mm. Low-temperature impact of the molded reservoirs is verified by ASTM D256 notched Izod at −30 °C; internal fluid pressure cycling is performed at 1.2 bar to simulate engine cooling thermal expansion. Qualification data are generated on actual molded bosses because notched laboratory specimens do not reproduce the triaxial stress at a brass insert. The final article is assembled into engine bays without secondary machining or adhesive bonding and is validated to OEM-specific reservoir durability schedules.
Rotary accumulator blow molding of 500 L to 1,000 L upright cylindrical tanks from DGDA-6094 shifts the critical failure mode from hoop stress to the vertical parison weld line, where incomplete melt merging at the pinch produces a low-stretch zone. The weld line is strengthened by raising head tooling temperature to 210–225 °C and opening the die gap to 5–10 mm during the final 20–30 % of parison extrusion; this maintains local melt temperature above 200 °C and extends molecular interdiffusion at the pinch. Tanks are produced with a nominal wall thickness of 3.0–5.5 mm and are hydrostatically tested according to ASTM D1998-21 for upright polyethylene storage tanks, with a design stress in the lower shells held within the unfilled HDPE range of 600–1,000 psi at 23 °C. For sodium hydroxide at 30–50 wt% and polyaluminum chloride at 10–18 wt%, tensile strength retention after 90 days immersion at 40 °C is evaluated by ASTM D543-21; published data for the specific blow molded DGDA-6094 tank configuration is limited, so liner coupon trials are recommended before final installation. Continuous exposure to sodium hypochlorite at 12–15 wt% creates a progressive oxidized surface layer that shifts failure to brittle cracking under impact within 6–12 months. The part therefore is not selected for continuous hypochlorite storage without a fluorinated inner surface or a sacrificial liner. The tank is installed as a dosing or holding vessel in water treatment plants, with lifting lugs and nozzles welded by spin welding rather than adhesive assembly.
Diesel exhaust fluid containers and similar urea-water solution packaging impose a narrow processing window between cold-drop impact and hot-stack creep. DGDA-6094 is extrusion blow molded into 10 L and 20 L rectangular containers with wall thickness 0.8–1.4 mm; corner radii are kept above 8 mm because HDPE notch sensitivity increases at −20 °C. Drop tests at −20 °C are conducted according to the packaging requirements of ISO 22241-3:2019 for NOx reduction agent, requiring no leakage after a 1.2 m drop in the filled condition. The same containers are stacked at 40 °C for 28 days; permanent deformation in the lower row must not exceed 15 %, which is verified under a constant compressive load equivalent to 2.5 times the filled product mass. The resin compound for DEF packaging contains a hindered amine light stabilizer and a UV absorber blended at 0.15–0.35 wt% total to withstand 1,000 h of ASTM G154 QUV exposure without surface chalking. Regrind is limited to 25 wt% because higher addition levels reduce low-temperature impact strength at the pinch-off seam and raise the probability of brittle failure in the −20 °C drop test. Production qualification is performed on the actual container geometry because laboratory ESCR does not fully correlate with pinch-off seam impact. The terminal container is fitted with a tamper-evident vented cap and meets dimensional requirements for hand-held dispensing of 10 L and 20 L DEF pack sizes.
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High Density Polyethylene DGDA-6094 is a high-molecular-weight HDPE resin supplied primarily for accumulator-head extrusion blow molding of large industrial containers, automotive fuel tanks, agricultural chemical packaging, and heavy-duty film structures. Supplier technical literature identifies the grade as a gas-phase-polymerized product with a density of 0.953 g/cm³ when measured by ISO 1183-1:2019 and a melt mass-flow rate of 0.36 g/10 min at 190 °C/2.16 kg under ISO 1133-1:2022. The melt-flow ratio, calculated as the 21.6 kg load melt index divided by the 2.16 kg load melt index, is reported in distributor bulletins as approximately 21–24; this value indicates a broadened molecular weight distribution and a controlled high-molecular-weight fraction. Tensile stress at yield is listed at 28 MPa under ISO 527-2:2012, elongation at break above 800 %, and flexural modulus near 1,200 MPa under ISO 178:2019. Environmental stress crack resistance measured by ASTM D1693-21 in 10 % Igepal CO-630 at 50 °C is commonly cited above 600 h without bent-strip cracking. These values are lot-inspection references, not guaranteed design minima; the controlling specification for each shipment is the producer’s certificate of analysis.
The primary application envelope includes extrusion blow molding of containers from 20 L to 220 L, agricultural chemical packaging, automotive fuel tanks, and industrial sacks. The resin is generally not recommended for thin-gauge film below 12 µm unless the film line is equipped with grooved-feed extrusion and internal bubble cooling, because the high-molecular-weight fraction reduces melt extensibility relative to narrower-molecular-weight distribution film grades.
The property difference is attributable to molecular weight distribution and tie-molecule population in the amorphous phase. In unimodal HDPE grades, increasing density typically reduces slow crack growth resistance because the higher crystalline fraction consumes polymer chains that would otherwise form tie-molecule entanglements between lamellae. DGDA-6094 resists this trade-off through a broadened distribution in which the low-molecular-weight fraction contributes to shear thinning during extrusion, while the high-molecular-weight fraction increases the number of load-bearing tie molecules. Slow crack growth resistance is assessed by ASTM D1693-21 bent-strip testing and, for critical service, by ISO 16770:2019 full-notch creep testing. Published comparative data for this specific configuration against a unimodal resin of equal density is limited; however, the reported 600 h F50 value under 10 % Igepal at 50 °C is characteristic of high-molecular-weight blow-molding grades rather than standard film grades.
General-purpose HDPE film grades with melt index near 0.9 g/10 min and density near 0.949 g/cm³ are designed for stiffness, clarity, and output rate; their molecular weight distribution is often narrower, and their high-shear viscosity is lower. DGDA-6094 trades output rate at a given screw speed for parison melt strength and environmental stress crack resistance. The difference is detectable on an accumulator-head machine as longer hang time without sag and as higher die swell.
On accumulator-head extrusion blow molding lines, DGDA-6094 is commonly processed on machines with clamp force from 50 tons to 120 tons, accumulator shot size from 5 kg to 10 kg, and a 120 mm single-screw extruder with 30:1 L/D ratio and grooved feed section. Barrel zone set points normally follow 170–180 °C at the feed throat, 190–220 °C in the metering zone, and 200–210 °C at the die head. Melt temperature measured by an immersion probe should be maintained between 190 °C and 220 °C; excursions above 230 °C accelerate antioxidant consumption and increase gel formation in the parison. Die swell for the grade is typically observed in the range 30–45 % at die-land shear rates between 100 s⁻¹ and 400 s⁻¹. Accumulator filling pressure ranges from 8 MPa to 14 MPa, depending on shot size and head tooling geometry. Parison programming should compensate for sag by reducing top-to-bottom wall-thickness differential to 15–25 %; excessive wall-thickness variation beyond 25 % produces paneling in square containers and thinning at the pinch-off.
Mold temperature is normally held at 10–30 °C to freeze the part surface quickly. Blow pressure of 0.6–0.8 MPa is sufficient for wall thicknesses from 2 mm to 5 mm; higher pressure does not compensate for low melt temperature and may increase flash at the parting line. Regrind incorporation up to 20 % is generally tolerated without loss of tensile properties measured by ISO 527-2:2012, but when regrind exceeds 20 %, the accumulation of oxidized surface layers may lower environmental stress crack resistance and should be monitored by ASTM D1693-21.
| Process parameter | Typical range | Control method |
|---|---|---|
| Barrel zone temperature | 170–220 °C | Immersion probe |
| Melt temperature | 190–220 °C | Adiabatic extrusion |
| Die head temperature | 200–210 °C | Head-zone thermocouples |
| Mold temperature | 10–30 °C | Water circulation |
| Blow pressure | 0.6–0.8 MPa | Electropneumatic regulator |
| Regrind limit | 20 % | Weight feeder |
Color concentrate addition at 2–4 % by weight is common for drum and fuel tank grades. The carrier resin should be a high-density polyethylene with melt index below 1.0 g/10 min to avoid localized viscosity reduction. Pigment concentrates containing heavy-metal salts may affect the outcome of REACH Regulation (EC) No 1907/2006 SVHC screening; the converter should request full formulation disclosure. Let-down ratio is controlled by loss-in-weight blenders with ±0.2 % accuracy.
High Density Polyethylene DGDA-6094 is not classified as hygroscopic, but surface condensation on pellets can occur when resin is transferred from an unheated warehouse into a heated production mezzanine with relative humidity above 60 %. In that case, hopper drying at 80 °C for 1–2 h with a desiccant or hot-air hopper dryer supplying air at a dew point of −20 °C or lower is recommended before extrusion. Drying time should not exceed 4 h at 80 °C because pellet surface oxidation can occur, especially with regrind present.
The resin’s stabilizer system is not intended for continuous melt exposure above 250 °C. Equipment shutdowns longer than 30 min at full barrel temperature should use a purge of low-melt-index HDPE or a commercial purging compound. Contact with amine-based antistatic additives, certain copper-based pigments, or aromatic process oils may deactivate the phenolic and phosphite stabilizer package and should be avoided unless the additive supplier provides documentation of compatibility. Long-term service under sustained tensile stress should remain below 60 °C; for fuel-tank or container applications involving continuous head pressure, hydrostatic design validation by ISO 9080:2012 or equivalent is required before selection.
For heavy-duty blown film conversion, DGDA-6094 is processed on grooved-feed extruders with screw diameter from 65 mm to 90 mm, 30:1 L/D ratio, and barrier screws with Maddock shear mixers. Die diameter is commonly 250 mm to 400 mm with die gap of 1.2 mm to 1.6 mm and blow-up ratio of 4:1 to 5:1. Melt temperature is typically set between 200 °C and 220 °C. Frost-line height is controlled between 800 mm and 1,200 mm above the die face to balance film toughness and bubble stability. Dart impact tested under ASTM D1709-22 for comparable high-molecular-weight HDPE film at 25 µm is reported above 150 g; published data for DGDA-6094 in this exact configuration is limited, so incoming resin qualification is required. Tear resistance is measured by ASTM D1922-23 or ISO 6383-2:2023, and the grade is used in industrial sacks, liners, and lamination base films where downgauging is constrained by impact and tear propagation rather than tensile yield.
Regulatory conformity for DGDA-6094 is generally supported by supplier declarations tied to specific end-use contact conditions. The following matrix summarizes the documentation to request from the resin supplier or converter for each commercial application.
| Application domain | Standard or clause | End-use condition |
|---|---|---|
| US food contact | FDA 21 CFR 177.1520(c) | Ambient and refrigerated use; not for hot-fill above 66 °C without migration testing |
| EU food contact | EU Regulation (EU) No 10/2011, Annex II and III | Overall migration limit 10 mg/dm²; specific migration limits per Annex III |
| Hazardous substances | REACH Regulation (EC) No 1907/2006, Annex XVII and SVHC | SVHC concentration below 0.1 % w/w per article |
| Electronic and electrical equipment | RoHS Directive 2011/65/EU, Annex II | Lead, mercury, cadmium, hexavalent chromium, PBB, PBDE below 0.1 % w/w or 0.01 % w/w for cadmium |
HDPE 5000S is commonly described as a general-purpose blow-molding grade with melt index near 0.8–1.0 g/10 min under ISO 1133-1:2022 and density near 0.962 g/cm³. DGDA-6094 has a lower melt index and lower density, which improves environmental stress crack resistance but reduces stiffness in thick-walled parts. On the same 120 mm accumulator-head line, the 21.6 kg/2.16 kg melt-flow ratio of DGDA-6094 is higher, providing greater parison hang time and better top-to-bottom wall-thickness control at shot sizes above 8 kg.
HDPE 7000F is typically classified as a blown film grade with melt index near 0.04 g/10 min and density near 0.956 g/cm³; its high molecular weight also gives high melt strength, but its melt-flow ratio and comonomer distribution are tuned for thin-gauge film toughness. DGDA-6094 overlaps with 7000F in some heavy-duty film applications, but its narrower processing window at high output rates can require higher die temperatures to avoid melt fracture. Published data for direct head-to-head comparisons is limited; selection between the two should be made by blow-up ratio, downgauging target, and ASTM D1709-22 dart impact on the actual film line.
Production-scale failure modes associated with DGDA-6094 include parison sag at low melt temperature or excessive accumulator residence time, weld-line separation at the pinch-off when clamp force is insufficient, and die-lip deposit when screw speed is maintained at high levels while barrel temperature is low. If the melt temperature falls below 180 °C, the high-molecular-weight fraction can produce melt fracture at die-land shear rates above 400 s⁻¹. The correction is not simply to raise die pressure; increasing die temperature to 210–220 °C and reducing screw speed by 10–15 % restores surface quality without over-degrading the material. Viscosity shifts between virgin pellets and processed regrind should be monitored by melt mass-flow rate comparison under ISO 1133-1:2022; an increase of more than 10 % indicates oxidative chain extension or gel formation and requires inspection of the extruder temperature profile and residence time. Loss of environmental stress crack resistance after multiple regrind loops is quantified by ASTM D1693-21; if F50 drops below 300 h, regrind content or melt history should be reduced.
