PetroChina Dushanzi HDPE HD6070EA
- Product Name: PetroChina Dushanzi HDPE HD6070EA
- Factroy Site: Yudu County, Ganzhou, Jiangxi, China
- Price Inquiry: admin@ascent-chem.com
- Manufacturer: Ascent Petrochem Holdings Co., Limited
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- PetroChina Dushanzi HDPE HD6070EA is typically used in formulations when melt flow rate and density must be controlled within specific ranges.
| HS Code | 452058 |
| Productname | PetroChina Dushanzi HDPE HD6070EA |
| Manufacturer | PetroChina Dushanzi Petrochemical Company |
| Polymertype | High Density Polyethylene (HDPE) |
| Chemicalformula | (C2H4)n |
| Casregistrynumber | 9002-88-4 |
| Appearance | White pellets |
| Odor | Odorless |
| Density | 0.960 g/cm³ |
| Meltflowrate | 7.0 g/10 min (190°C/2.16 kg) |
| Tensileyieldstrength | ≥25 MPa |
| Elongationatbreak | ≥500% |
| Flexuralmodulus | ≥1000 MPa |
| Notchedizodimpactstrength | 50 J/m |
| Vicatsofteningpoint | ≥125°C |
| Brittlenesstemperature | ≤-70°C |
| Hardnessshored | ≥60 |
| Moldshrinkage | 1.5-3.0% |
| Waterabsorption | ≤0.01% |
| Volumeresistivity | ≥1×10^16 Ω·cm |
| Dielectricconstant | 2.3 |
| Dielectricstrength | ≥20 kV/mm |
| Meltingpoint | 130-135°C |
| Heatdeflectiontemperature | 70-80°C |
| Thermalconductivity | 0.4 W/(m·K) |
As an accredited PetroChina Dushanzi HDPE HD6070EA factory, we enforce strict quality protocols—every batch undergoes rigorous testing to ensure consistent efficacy and safety standards.
| Packing | PetroChina Dushanzi HDPE HD6070EA is packaged in 25 kg polyethylene-lined woven bags, with 40 bags (1,000 kg) per pallet. |
| Container Loading (20′ FCL) | 20′ FCL container loading: PetroChina Dushanzi HDPE HD6070EA in 25 kg bags, palletized, stretch-wrapped, and secured for export. |
| Shipping | PetroChina Dushanzi HDPE HD6070EA is a non-hazardous high-density polyethylene resin, shipped as pellets in 25 kg bags, jumbo bags, or bulk. Transport in clean, dry, ventilated containers. Protect from moisture, direct sunlight, heat, and contamination. Not classified as dangerous goods under ADR, IMDG, or IATA; standard cargo handling applies. |
| Storage | Store PetroChina Dushanzi HDPE HD6070EA in a cool, dry, well-ventilated warehouse, away from direct sunlight, heat, flames, and strong oxidizers. Keep original bags sealed, palletized, and off the floor to prevent moisture and contamination. Avoid prolonged stacking overloads and UV exposure. Maintain clean handling areas; prevent pellet spills and dust accumulation. Store separately from incompatible materials and follow supplier SDS/local regulations. |
| Shelf Life | Typically 24 months when stored unopened in a cool, dry, well-ventilated area, away from direct sunlight and moisture. |
For UN 1H1 open-top and tight-head drums in the 120–220 L class, PetroChina Dushanzi HD6070EA is processed on accumulator-head shuttle blow moulding lines with carriage clamping force typically between 1200 kN and 1800 kN. The producer datasheet places the grade at a density of 0.960 g/cm³ under ISO 1183-1:2019 and a melt mass-flow rate of 0.7 g/10 min under ISO 1133-1:2022. These values place HD6070EA in the high-molecular-mass blow moulding envelope required for parison lengths exceeding 1.5 m and shot weights above 4.5 kg. Barrel zone set points are normally distributed from 180°C near the feed throat to 210°C at the metering section, with accumulator head temperature controlled at 195–210°C and die exit melt temperature held at 200–215°C. The die gap is set between 1.6 mm and 2.4 mm depending on container diameter, and a 10-point parison programmer is used to redistribute wall thickness before mould closure. In this application, the dominant processing conflict is parison sag versus pinch-off weld integrity. If die exit melt temperature exceeds 220°C, sidewall drawdown becomes noticeable above 1.2 m parison length and the bottom chime may lose 10–15% of its programmed thickness. If tail temperature falls below 185°C, the front and back parison lobes no longer interdiffuse sufficiently at the pinch-off, producing a poor weld at the mould parting line. Blow air pressure is maintained at 0.6–0.8 MPa and mould cooling water is supplied at 10–16°C. The wall thickness profile for a 220 L L-ring drum typically targets 6–8 mm in the chime and top rim, 4.5–6.0 mm in the bottom corner transition, and 2.8–3.5 mm on the nominal sidewall. Each production lot is subjected to in-plant leak tightness testing at 20 kPa internal air pressure for 10 min, followed by hydraulic proof pressure testing at 100 kPa for 1 h. Terminal containers are used for lubricating-oil additives, water-treatment chemicals, and other dangerous goods where UN 1H1 packaging certification is mandatory.
How Does Compatibilized PCR Affect ESCR in Agrochemical Drum Layers?
Three-layer coextrusion blow moulding of 45 L tight-head jerrycans for emulsifiable concentrate herbicides and insecticides commonly places post-consumer recyclate in the core layer while retaining virgin HD6070EA as the product-contact inner layer. The outer layer is compounded from 100 parts HD6070EA, 0.10 phr hindered phenolic antioxidant, 0.05 phr phosphite process stabilizer, and 2.0–2.5 wt% carbon black masterbatch. The core layer may contain 30 wt% washed HDPE bottle scrap with a melt mass-flow rate between 0.4 g/10 min and 0.9 g/10 min under ISO 1133-1:2022, while the inner layer remains 100% virgin HD6070EA. Three extruders feed a three-layer accumulator head with layer distribution set at 20/60/20 or 15/70/15, depending on the aggressiveness of the solvent system. Coextrusion melt temperatures are held at 195–210°C to avoid thermal degradation of the recyclate while maintaining interlayer adhesion. The ESCR of the composite is evaluated on bottle wall sections under ASTM D1693-15 Condition B at 50°C in 10% Igepal CO-630. A 100% virgin HD6070EA wall typically produces F50 values above 200 h, whereas the PCR-containing core may lower bulk F50 by 20–40% depending on residual antioxidant loading, source polymer molecular mass, and contamination level. Published data for this specific three-layer configuration is limited; qualification must be done on finished bottle walls rather than compression-moulded plaques because the inner virgin layer controls the failure initiation site. Terminal products are 20 L and 45 L jerrycans for xylene-based pesticide formulations, where the inner virgin layer limits swelling and stress cracking while the PCR core reduces material cost without breaching the specification for UN 3H1 packaging.
On a 75 mm single-screw extruder with a 33:1 L/D barrier screw and a melt pump, HD6070EA is converted into sheet in the 0.6–2.5 mm thickness range for plug-assist thermoforming of chilled and frozen food trays. The grade contributes flexural modulus near 1100 MPa under ISO 178:2019, which allows shallow trays and lids to maintain dimensional stability at cold-fill temperatures. Extruder barrel sections are set from 190°C to 220°C, the melt pump suction temperature is held at 215°C, and the die body is controlled at 220°C. The three-roll polishing stack operates with a lower roll at 70°C, middle roll at 90°C, and upper roll at 80°C to remove sheet stresses before thermoforming. During plug-assist forming, sheet surface temperature is brought to 150–165°C using ceramic heaters, the aluminium tool is held at 35–50°C, and the syntactic foam plug is maintained at 80–95°C. Compliance for food-contact use is governed by FDA 21 CFR 177.1520 for olefin polymers and by EU 10/2011 with an overall migration limit of 10 mg/dm². Organoleptic taint testing is required for fatty-food simulants because low-molecular-weight polyethylene waxes can migrate at chilled temperatures. The grade is not suitable for retort or hot-fill processes above 60°C, where tray distortion becomes measurable due to the polyethylene heat deflection range. Terminal products include cold-fill dairy snack cups, frozen pastry inserts, and produce punnets.
When In-Line Fluorination Creates a Barrier for Oxygenated Solvents in Blow Moulded Bottles
Blow moulded bottles from HD6070EA in the 1 L to 5 L range are used for oxygenated solvents and hydrocarbon blends after in-line fluorination. The bottle body is blow moulded at a wall thickness of 1.5–2.5 mm, then transferred to a fluorination reactor where the inner surface is exposed to a fluorination atmosphere containing 0.5–1.5 vol% F₂ in nitrogen. Reactor temperature is controlled at 20–40°C and residence time is adjusted between 10 s and 60 s to produce a fluoropolymer-like surface layer typically 5–20 nm thick. The fluorinated layer reduces permeation of toluene, methyl ethyl ketone, xylene, and chlorinated paraffin carriers compared with untreated HDPE. Permeation qualification is performed using ASTM D2684-18 with the specified filled solvent at 40°C and 50°C; acceptance limits are product-specific because permeation rate depends on container surface-to-volume ratio and storage duration. Published data for HD6070EA under industrial fluorination is limited, and the fluorinated layer thickness is not directly measured by optical microscopy but is inferred from XPS depth profiling or permeation-rate reduction. The fluorination step lowers surface energy and reduces print adhesion, so corona discharge treatment is required before silk-screen decoration. Terminal products are UN 3H1/Y or UN 3H2/Y bottles for agricultural adjuvants, coatings intermediates, and laboratory solvents where conventional HDPE would show excessive weight loss during storage. The process is not recommended for strong oxidizing acids because fluorine-treated polyethylene still lacks the oxidation resistance of fully fluorinated polymers such as PTFE.
A compliance matrix for the principal downstream routes is consolidated in Table 1.
| Application segment | Governing regulation or standard | Test method | Critical control limit |
|---|---|---|---|
| Food-contact sheet and trays | FDA 21 CFR 177.1520, EU 10/2011 | Overall migration | 10 mg/dm² |
| Industrial drum body | UN 1H1 | Hydraulic proof pressure | 100 kPa for 1 h |
| Fluorinated solvent bottles | ASTM D2684-18 | Permeation rate at 40°C | Product-specific |
| Drainage pipe | EN 13476-3, ISO 9969 | Ring stiffness | SN4–SN8 |
| Acid scrubber duct | ASTM D543-21, ISO/TR 10358 | Immersion weight change | ≤1.0% in specified acid |
Where agricultural field drainage and highway edge drains require ring-stiffness grades from SN4 to SN8 under ISO 9969, HD6070EA is coextruded as virgin capstock over a post-industrial regrind core in twin-wall corrugated pipe. The cap layer is fed from a 90 mm single-screw extruder with a 30:1 L/D barrier screw, while the core layer uses a second extruder processing 30–50 wt% clean HDPE regrind of similar melt flow class. Melt temperature at the coextrusion die is held at 205–215°C, and corrugator mould blocks are cooled to 15–25°C. Carbon black masterbatch is added to the cap layer at 2.5 wt% to meet outdoor weathering requirements under ISO 16871:2003 exposure testing. The final pipe is produced in diameters from 110 mm to 200 mm with a smooth inner wall and annular corrugated outer wall. The HD6070EA cap layer contributes the stiffness required for ring-stiffness class SN4 or SN8 without exceeding the pipe wall thickness limits defined in EN 13476-3. Terminal products are installed as culverts, agricultural field drains, and highway sub-surface drainage lines where soil pH is between 5 and 9 and continuous service temperature remains below 45°C.
Unplasticized Extrusion Profiles for Acid Scrubber Duct Fabrication
Sheet and profile extrusions from HD6070EA are butt-fused into rectangular duct sections for hydrochloric and sulfuric acid scrubber systems in metal pickling and electroplating halls. Extruded sheet in the 10–30 mm thickness range is cut to duct panels and welded using butt fusion at 210–220°C. Bead pressure is controlled at 0.15 MPa during fusion, and the cooling period under pressure is held at not less than 15 min for each 25 mm of wall thickness to avoid cold-fusion defects. Chemical resistance data are evaluated using ASTM D543-21 immersion testing and cross-checked against the chemical resistance classes in ISO/TR 10358. HD6070EA duct sections show acceptable service in sulfuric acid concentrations from 20% to 80% at 20°C, hydrochloric acid from 10% to 35% at 20°C, and sodium hydroxide from 20% to 50% at 20°C. The material is not recommended for continuous exposure to concentrated nitric acid above 10% at 30°C because oxidative attack causes surface cracking and weight loss. Terminal products include acid scrubber housings, fume hood extraction ducts, and secondary containment sumps in waste treatment buildings. Welded seams must be spark-tested at 20 kV to detect pinholes before installation; this is a standard inspection method for HDPE duct systems.
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- PetroChina Dushanzi HDPE HD6070EA 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: admin@ascent-chem.com.
PetroChina Dushanzi HDPE HD6070EA is a bimodal high-density polyethylene compound supplied for solid-wall pressure pipe extrusion and classified within the PE100 MRS 10 MPa category of ISO 12162. The material is produced at the Dushanzi Petrochemical site and distributed as a black pipe compound whose carbon black dispersion provides ultraviolet screening for buried and above-ground service. Published release specifications for HD6070EA include a nominal density of 0.959 g/cm³ determined to ISO 1183-1 and a melt flow rate of 0.25 g/10 min at 190°C/5 kg according to ISO 1133-1. These values place the grade at the low-melt-flow end of the HDPE pipe-resin spectrum, distinguishing it from injection-molding and blow-molding grades that are designed for high-throughput cavity filling rather than long-term hydrostatic resistance. Applications are concentrated in pressure piping for potable water, industrial water, and sewage force mains specified under ISO 4427 and GB/T 13663.2.
Representative specification values published for HD6070EA are listed below.
| Property | Nominal value or range | Test method |
|---|---|---|
| Density | 0.959 g/cm³ | ISO 1183-1 |
| Melt flow rate at 190°C/5 kg | 0.25 g/10 min | ISO 1133-1 |
| Tensile yield stress | 25 MPa | ISO 527-2 |
| Elongation at break | >600% | ISO 527-2 |
| Carbon black content | 2.0–2.5% | ISO 6964 |
| Oxidation induction time | >30 min | ISO 11357-6 |
| Hydrostatic design stress, MRS | 10 MPa | ISO 9080 |
| Environmental stress crack resistance, F50 | >1000 h | ASTM D1693 Condition B |
The listed values are nominal and are not a complete specification. Pipe-grade compounds are released against lot-specific hydrostatic test data rather than melt-flow data alone, and the purchaser should request the manufacturer’s certificate of analysis before qualifying the product for pressure pipe production. Material quality is controlled within the manufacturer’s ISO 9001-registered system, and pipe-grade conformity is assessed by the hydrostatic strength and notched pipe requirements of ISO 4427-1. Carbon black dispersion is evaluated under ISO 18553; the dispersion rating must satisfy the pipe standard before weathering or pressure tests are performed. For potable-water contact, final pipe articles are subject to national hygienic certification and, where applicable, migration limits defined in Regulation (EU) 10/2011.
How Does the Bimodal Molecular Architecture Affect Slow Crack Growth and Hydrostatic Failure?
The bimodal molecular architecture of HD6070EA is designed to separate two competing requirements in pipe-grade polyethylene. The high-molecular-weight copolymer fraction carries a greater number of tie molecules, which bridge adjacent lamellae and resist craze formation under low-level hydrostatic stress. The low-molecular-weight homopolymer fraction functions as an internal processing aid, lowering the shear viscosity of the blend without reducing the average molecular weight to a level that would compromise environmental stress crack resistance. This separation is apparent in the melt flow ratio between the 5 kg and 21.6 kg conditions; bimodal PE100 pipe resins of this type often display a ratio above 30:1, indicating strong shear thinning under extrusion shear fields.
Slow crack growth in pressurized pipe is governed by the stability of fibrils in crack-tip crazes. A notch or surface defect initiates a localized damage zone; if the tie-molecule density is insufficient, the fibrils rupture, and the crack advances stepwise through the wall. In HD6070EA, the high-Mw fraction increases the number of load-bearing chains per unit fracture surface. The standard notched pipe test under ISO 13479 exposes a notched specimen to 80°C water at 0.80 MPa; PE100 materials are expected to exceed 500 h before brittle failure. The strain hardening modulus measured under ISO 18488 is a complementary index of the tie-molecule network. PE100 pipe grades of comparable density typically register a strain hardening modulus above 50 MPa. Published data specifically for HD6070EA under ISO 13479 is limited in open sources; lot-specific release testing is required where independent verification is necessary.
The carbon black dispersion in the pipe compound also affects slow crack growth. Undispersed carbon black agglomerates act as stress concentrators and can reduce failure time under constant internal pressure. Pipe grades therefore control not only carbon black content by ISO 6964 but also dispersion quality by ISO 18553. A poorly dispersed black compound may pass carbon black content and density checks while failing long-term pipe performance, which is why hydrostatic testing and notched pipe testing are both used in product qualification.
The hydrostatic design basis follows ISO 9080. Regression analysis of long-term pipe pressure tests places the material in the 10 MPa minimum required strength category at 20°C for 50 years. The resulting allowable design stress with a service design coefficient of 1.25 is 8.0 MPa. This compares with 6.4 MPa for a PE80 resin at the same coefficient. The higher design stress permits either a higher operating pressure at a given wall thickness or a thinner wall at a constant pressure rating, subject to the minimum wall thickness and handling requirements in ISO 4427-3.
Extrusion handling of HD6070EA on a grooved-barrel single-screw extruder is governed by the shear-heating constraints common to high-molecular-weight PE100 pipe compounds. A barrel profile from 180°C in the feed zone to 220°C at the die head is usually adequate; melt temperature should be maintained between 200°C and 230°C and should not exceed 240°C for more than momentary residence. On a 30:1 or 36:1 L/D barrier screw with a grooved feed section, head pressures in the 250–350 bar range are common for PE100 resins of this melt flow rate. Pre-drying is not required for sealed packaging, but if storage humidity exceeds 60% RH or condensation is visible, surface moisture should be removed at 80°C for 2–4 h before extrusion to reduce melt-pressure fluctuation and surface pinhole defects. The compound is compatible with standard polyolefin processing aids, but contact with copper salts, free-radical initiators, or high-chlorine flame-retardant masterbatches should be avoided unless oxidation induction time retention is confirmed.
Because the product contains carbon black in the 2.0–2.5% range, it is not suited to natural or custom-colored pipe without over-pigmentation. Its high melt viscosity also makes it unsuitable for injection molding; spiral flow length under typical injection pressures would limit cavity filling and increase cycle time. The product is therefore specified for continuous solid-wall pipe extrusion, not for injection-molded fittings. Fittings in the same system are usually produced from separate PE100 fitting grades with higher MFR, and the joint performance is qualified by butt fusion and electrofusion tests under ISO 21307 and ISO 13953.
When HD6070EA Replaces a Conventional PE80 Resin in Existing Pipe Tooling, What Adjustments Are Required?
Conversion of an existing PE80 pipe line to HD6070EA usually requires adjustment of the barrel temperature profile rather than replacement of the screw. Because the PE100 grade has a lower melt index, screw torque and head pressure increase if the barrel profile remains low. Raising the feed zone temperature closer to 190°C and the compression zone to 210–220°C lowers viscosity while preserving output. In parallel, the die gap and land length may need revision to prevent surface melt fracture; insufficient land length for the higher melt elasticity of a bimodal grade can produce sharkskin on the outer surface at small-diameter line outputs above 1.0 m/min.
Cooling demand changes because HD6070EA has a higher crystallinity and may require longer calibration and cooling lengths to achieve dimensional stability. The pipe haul-off speed must be coordinated with melt pressure and wall-thickness control so that residual stress does not remain in the pipe wall. Longitudinal reversion measured under ISO 2505 can be used to verify that cooling is adequate; values below 3% are commonly expected for qualified PE100 pipe production. Screen packs and melt pumps may also require recalibration because the melt viscosity and filtration demand are different from lower-molecular-weight grades.
Comparative Differentiation from Unimodal HDPE and General-Purpose Pipe Grades
Relative to a unimodal HDPE of the same density, HD6070EA exhibits a broader molecular weight distribution and a higher concentration of tie molecules in the high-molecular-weight fraction. This translates into greater slow crack growth resistance and higher strain hardening modulus at the same melt flow rate. The trade-off is that capillary viscosity at low shear rates is higher, but pronounced shear thinning at pipe extrusion shear rates in the 100–1000 s⁻¹ range offsets this. Published data for the exact shear-viscosity curve of HD6070EA in this range is limited in publicly available literature; extrusion trials at the production site are therefore appropriate before committing to tooling modifications.
Compared with PE80 and PE63 products, the allowable design stress is higher by 2 MPa and 3 MPa, respectively, at 20°C under ISO 9080. This allows a wall-thickness reduction of roughly 20–25% for a given pressure class, depending on the design coefficient and temperature derating factors. The material decision is not purely hydraulic; the thinner wall may reduce polymer consumption but also reduces thermal inertia during butt fusion, so welding parameters must be qualified to ISO 21307 before deployment. The black compound also differs from natural PE100 grades because carbon black changes the thermal conductivity and heating-plate response during fusion jointing.
In slurry and dredge service, solid-wall HD6070EA pipe is used for the transport of abrasive particulates where the failure mechanism shifts from hydrostatic creep to wall erosion and third-body wear. The bimodal polyethylene matrix resists slow crack growth initiated by notch defects created by slurry impingement, but the design must still include a corrosion allowance for wall loss. Under ISO 4427-3, the wall-thickness calculation for pressure containment is combined with an abrasion allowance derived from slurry abrasion testing; for iron-ore tailings, abrasion rates vary widely and published data for this specific configuration is limited. The carbon black package in HD6070EA provides ultraviolet stability for exposed pipe sections, but the product is not recommended for continuous service with strong oxidizing acids, aromatic hydrocarbons above 40°C, or chlorinated solvents because these media can plasticize or degrade the polyethylene matrix and reduce the long-term hydrostatic strength.
