PetroChina Dushanzi HDPE 5301AA
- Product Name: PetroChina Dushanzi HDPE 5301AA
- Factroy Site: Yudu County, Ganzhou, Jiangxi, China
- Price Inquiry: admin@ascent-chem.com
- Manufacturer: Ascent Petrochem Holdings Co., Limited
- CONTACT NOW
- PetroChina Dushanzi HDPE 5301AA is typically used in formulations when melt flow rate and density, and blow-up ratio and melt temperature, must be controlled within specific ranges.
| HS Code | 189670 |
| Density | 0.954 g/cm³ |
| Melt Flow Rate | 0.8 g/10 min |
| Tensile Strength At Yield | 28 MPa |
| Elongation At Break | 600% |
| Flexural Modulus | 1100 MPa |
| Vicat Softening Temperature | 125 °C |
| Heat Deflection Temperature | 75 °C |
| Shore D Hardness | 65 |
| Notched Izod Impact Strength | 50 kJ/m² |
| Environmental Stress Crack Resistance | >1000 h |
| Water Absorption | <0.01% |
| Dielectric Strength | 20 kV/mm |
| Volume Resistivity | >1×10^16 Ω·cm |
| Melting Point | 135 °C |
| Crystallinity | 80% |
As an accredited PetroChina Dushanzi HDPE 5301AA factory, we enforce strict quality protocols—every batch undergoes rigorous testing to ensure consistent efficacy and safety standards.
| Packing | PetroChina Dushanzi HDPE 5301AA is packed in 25 kg polyethylene woven bags, supplied on pallets with 1000 kg per pallet. |
| Container Loading (20′ FCL) | 20' FCL container loaded with 25 kg bags of PetroChina Dushanzi HDPE 5301AA, securely stowed and sealed for export shipment. |
| Shipping | PetroChina Dushanzi HDPE 5301AA is a non-hazardous high-density polyethylene resin, typically shipped in 25 kg PP woven bags or 500–1000 kg jumbo bags, palletized and stretch-wrapped. Transport in clean, dry containers/trucks; protect from moisture, sunlight, heat, contamination, sharp objects, and open flames. No special hazardous handling required. Keep sealed until use. |
| Storage | Store PetroChina Dushanzi HDPE 5301AA in a cool, dry, well-ventilated warehouse, away from direct sunlight, heat, moisture, and strong oxidizers. Keep original bags sealed, palletized, and off the floor. Avoid sharp objects, contamination, and prolonged UV exposure. Maintain moderate temperature and humidity, use FIFO stock rotation, and prevent excessive stacking or static buildup. Inspect packaging regularly. Follow local regulations. |
| Shelf Life | PetroChina Dushanzi HDPE 5301AA has a 36-month shelf life when stored cool, dry, ventilated, and away from direct sunlight. |
PetroChina Dushanzi HDPE 5301AA is a high-molecular-weight extrusion blow-moulding grade used in rigid industrial and household packaging. The melt mass-flow rate published for the grade is in the 0.30–0.40 g/10 min range at 190°C/2.16 kg under ISO 1133-1:2022, and density is 0.953 g/cm³ under ISO 1183-1. The low MFR contributes to high parison hang strength but also increases die swell and melt pressure at the die head, making tooling geometry and wall-thickness programming the central process variables rather than temperature alone. The typical property envelope used for downstream qualification is summarised in the table below.
| Property | Test method | Published typical range |
|---|---|---|
| Melt mass-flow rate | ISO 1133-1:2022, 190°C/2.16 kg | 0.30–0.40 g/10 min |
| Density | ISO 1183-1 | 0.952–0.954 g/cm³ |
| Tensile yield stress | ISO 527-2 | 24–26 MPa |
| Charpy notched impact at 23°C | ISO 179-1 | 15–20 kJ/m² |
| Environmental stress-crack resistance, F50 | ASTM D1693-15, 10% Igepal, 50°C | >40 h |
| Vicat softening temperature, A50 | ISO 306 | 122–126°C |
When 30 L tight-head drums carry UN 3H1 certification
Extrusion blow-moulded jerricans in the 20–30 L range intended for liquid dangerous goods are designed around UN 3H1 certification. On accumulator-head machines with 80–120 mm extruder diameter and 24:1–30:1 L/D, the melt temperature is held at 190–205°C. A parison programmer is not optional: the sidewall target is 2.5–3.0 mm, the bottom pinch area 3.5–4.0 mm, and the shoulder transition 3.0–3.5 mm. Blow-up ratio is kept between 2.4:1 and 3.0:1. Mould coolant temperature of 10–20°C and internal blow air at 0.6–0.8 MPa are set to fix the part before crystallisation shrinkage creates excessive post-mould volume change. Destructive qualification under UN/ADR for liquid dangerous goods includes drop testing conditioned at -18°C for 24 h, hydraulic leakproofness at 250 kPa for 30 min, and a stack test with a 3 m equivalent load at 40°C for 28 days. Drop height is 1.2 m for packing group II liquids with relative density up to 1.2, but the height is adjusted upward for higher-density products. The main process conflict is that higher melt temperature improves weld-line strength at the tail pinch but increases parison sag; deviations above 205°C at the die head reduce hang strength and shift the lower wall thickness outside the programmed range. The die head zone is therefore normally set 5–10°C lower than the metering zone.
Impact of die swell on continuous shuttle machines running household bleach packs
Household bleach bottles of 750 mL–5 L are run on first-in-first-out shuttle machines with 60–75 mm extruder diameter and 20:1–24:1 L/D. The parison swell of HDPE 5301AA is substantially higher than that of injection-moulding HDPE; with a diverging die gap of 1.8–2.2 mm, the observed swell ratio commonly reaches 30–45%. Tooling offsets must therefore reduce the die pin outside diameter relative to the neck finish, otherwise the neck calibration thins excessively at the trim line. Melt temperature is controlled at 185–200°C to avoid shark-skin on the parison surface while retaining enough hang strength. Sodium hypochlorite at 5–10% active chlorine does not rapidly degrade natural HDPE, but stress cracking initiates at pinch-off scars and corner radii; these zones require a minimum inside corner radius of 3 mm and hot-knife tail trimming to reduce notch sensitivity. The masterbatch load is typically 3–5 wt% titanium dioxide and 0.20–0.35 wt% fluorescent whitening agent. Drop-impact acceptance is tested under ASTM D2463-15, and ESCR under ASTM D1693-15 provides comparative shelf-life prediction. For 5 L bleach containers classified as corrosive liquids, UN 3H1 or UN 3H2 qualification may apply depending on closure type; the pack must then meet the same UN drop and leakproofness sequence as industrial dangerous goods containers. Top-load retention under a loaded pallet is checked at 40°C to ensure the bottle does not deflect more than 5% of its height after conditioning.
On rotary-wheel and accumulator-head lines producing 4–5 L automotive engine oil bottles, the parison drop length is short enough that die swell, not sag, controls diameter distribution. HDPE 5301AA processed at melt temperature 195–205°C is targeted for a bottle weight variation of ±2.5% across a 12-cavity wheel, which requires gravimetric extrusion control and continuous parison length adjustment on each head. For engine oil service, the container must survive hot filling at 50–60°C without panel deformation; the grade’s Vicat softening temperature of 122–126°C is not the limiting value, because top-load creep at 55°C under full pallet stack governs deformation. Ethylene glycol-water coolant bottles require a 14-day compatibility hold at 40°C with 50% relative humidity; cap liner and label adhesive extractables are measured, and the bottle is rejected if visual staining or extractable odour is detected. Pinch-off tail flash on 4 L bottles is trimmed to leave not more than 0.8 mm residual height, as deeper knife cuts reduce drop performance at -20°C. Automotive fluid containers are normally outside food-contact scope, but if a distributor intends refilling or dual-use, the finished pack including cap and liner is verified under FDA 21 CFR 177.1520 and EU 10/2011; resin compliance alone is insufficient for the assembled article.
Which residual stress threshold governs agrochemical pack shelf life?
Agrochemical containers in the 1–25 L range are blow-moulded from HDPE 5301AA only after compatibility screening, because aromatic solvent fractions above 10 wt% accelerate environmental stress-cracking in monolayer polyethylene. Water-based suspension concentrates and soluble fertiliser solutions are generally compatible; emulsifiable concentrates containing xylene, cyclohexanone, or toluene require either a polyamide barrier layer in coextrusion or post-mould fluorination, regardless of the ESCR value of the base resin. The controlling test is ASTM D1693-15 at 50°C in 10% Igepal, but it is supplemented by 28-day actual formulation storage at 40°C and visual inspection of the pinch-off zone after container sectioning. Residual stress is assessed by annealed shrinkage or polariscopic inspection; excessive hoop stress at the sidewall/pinch junction is a predictor of field cracking. UN-rated agrochemical packs follow the same drop conditioning at -18°C as industrial chemicals, and stacking performance is derived from compressive creep at 40°C rather than ambient top load. If the formulation contains methyl chloride or high aromatic solvent levels above 10 wt%, monolayer HDPE is outside its service boundary and published data for this specific configuration is limited; qualification must be run on the finished container, not inferred from resin datasheet ESCR.
In non-food industrial packaging, HDPE 5301AA is frequently let down with post-consumer recycled high-density polyethylene at ratios from 30:70 to 70:30 virgin to recyclate, depending on wall thickness and target ESCR. The blend presents a narrower processing window than the virgin grade because recyclate melt-flow variation of ±0.15 g/10 min changes parison diameter and pinch-weld strength from lot to lot. Converters compensate with gravimetric extrusion control at ±1.5% throughput tolerance and by recording parison weight, not only length, every 30 min of continuous running. Filtration through 60–80 mesh screens removes hard contaminants from the recyclate but raises melt temperature by 2–5°C; the extruder set point is adjusted downward compared with virgin processing to prevent low-viscosity melt instability at the die lip. For 20 L industrial canisters with 1.5 mm minimum sidewall, the regrind fraction is capped at 50 wt% when UN 3H1 low-temperature drop performance is required, as higher recyclate levels degrade ESCR and pinch-weld ductility. The dominant failure mode observed on production trials is not filler contamination but weld-line cracking caused by incompatible polypropylene fines carried into the HDPE recyclate stream; incoming recyclate should be screened by differential scanning calorimetry under ISO 11357-3 for a polypropylene melting endotherm near 160–165°C before large-scale blending.
Blow moulding variables for 10–60 L industrial liquid packaging
Industrial liquid packaging between 10 L and 60 L includes sealed-head jerricans and open-head drums with injection-moulded closures. On large-part accumulator-head machines with 100–150 mm screw diameter and 24:1–30:1 L/D, HDPE 5301AA is run with a reverse temperature profile to prevent screw bridging: feed throat 30–50°C, compression zone 175–185°C, metering zone 185–195°C, and head/die 190–200°C. When drop length exceeds 700 mm, parison sag becomes measurable, so containers above 30 L are programmed with a thicker lower third: bottom wall 3.0–3.5 mm and upper wall 2.5–3.0 mm. Blow air is introduced at 0.7–0.9 MPa and held for 20–40 s, while mould coolant is controlled at 12–18°C. The low melt flow rate restricts detail reproduction in pinch-out regions; handle flash wells are designed with an included angle of not less than 45° to prevent thin flash fracture during de-moulding. For dangerous goods packs, 100% leak testing by differential pressure decay at 15–25 kPa over 5–10 s is followed by batch destructive testing to UN 1H1/3H1 requirements. The grade is not appropriate for injection-moulded caps and spouts; those components require a high-flow polypropylene or HDPE with MFR above 4 g/10 min to prevent short-shot and weld-line failure in closure moulds.
Competitive PetroChina Dushanzi HDPE 5301AA prices that fit your budget—flexible terms and customized quotes for every order.
For samples, pricing, or more information, please contact us at +8618136850665 or mail to admin@ascent-chem.com.
We will respond to you as soon as possible.
Tel: +8618136850665
Email: admin@ascent-chem.com
Get Free Quote of Ascent Petrochem Holdings Co., Limited
Flexible payment, competitive price, premium service - Inquire now!
- PetroChina Dushanzi HDPE 5301AA 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 5301AA is a high-molecular-weight high-density polyethylene resin produced at the PetroChina Dushanzi Petrochemical complex. The grade is positioned for blown-film extrusion where a low melt mass-flow rate supports bubble stability and downgauged film toughness. Commercially available product data typically list a melt mass-flow rate of 0.05 g/10 min measured under ISO 1133-1:2022 at 190 °C and 2.16 kg, and a nominal density of 0.951 g/cm³ determined according to ISO 1183-1:2019. These values are commercial reference data, not specification limits for every lot. The producer’s certificate of analysis remains the controlling document for the specific resin lot, and converters should verify melt flow and density before setting extruder barrel profiles, screw speed, or die geometry.
Material control parameters for HDPE 5301AA generally include melt mass-flow rate, density, tensile yield stress, tensile elongation at break, Elmendorf tear resistance, dart impact resistance, and environmental stress crack resistance. Incoming material control should reference ISO 1133-1:2022 for melt mass-flow rate, ISO 1183-1:2019 for density, ISO 527-2:2012 for tensile properties, ISO 7765-1:1998 for dart impact, ASTM D1922 for Elmendorf tear, and ASTM D1693 condition B for environmental stress crack resistance. The grade’s high molecular weight reduces molecular mobility at the die lips, so melt pressure and melt temperature must be observed throughout the run. A blocked screen pack can manifest as a pressure increase above the extruder’s safety limit before visible film defects appear.
Commercially reported mechanical values for this high-molecular-weight film HDPE family include a tensile yield stress of approximately 25 MPa and an elongation at break above 500 %; these values should be treated as reference data only because specimen thickness, gauge, and conditioning influence the result. Published data for this specific Dushanzi grade is limited outside the producer’s certificate of analysis. Unverified generic HDPE property ranges should not be used for die-lip gap calculations or specification review.
| Property | Test method | Process relevance |
|---|---|---|
| Melt mass-flow rate | ISO 1133-1:2022, 190 °C/2.16 kg | Controls shear viscosity and screw back pressure |
| Density | ISO 1183-1:2019 | Sets film stiffness and barrier characteristics |
| Tensile yield stress | ISO 527-2:2012 | Indicates downgauging potential |
| Tensile elongation at break | ISO 527-2:2012 | Ductility after orientation |
| Dart impact resistance | ISO 7765-1:1998 | Film toughness under sudden load |
| Elmendorf tear resistance | ASTM D1922 | Tear propagation in bag film |
| Environmental stress crack resistance | ASTM D1693 condition B | Resistance to detergent and chemical attack |
Film-grade HDPE of this type is not hygroscopic in the same manner as polyamide or polyethylene terephthalate. Pre-drying is not required if pellets remain sealed and are transferred in a dry handling system. Where cold pellet silos discharge into a warm extrusion hall, surface condensation may occur; hopper drying at 60 °C for 2 h is a common preventative measure. The material should not be exposed to oxidizing atmospheres at processing temperatures above 230 °C, because antioxidant depletion accelerates and can result in gel formation. Packaging is commonly 25 kg multi-wall paper bags or bulk hopper trucks, but the producer’s logistics group should confirm available packaging configurations.
From a polymerization standpoint, high-density polyethylene of this class is produced by low-pressure catalytic processes. The additive package typically contains a phenolic antioxidant, a phosphite stabilizer, and an acid scavenger, although the exact formulation is producer-specific. The grade’s density near 0.951 g/cm³ corresponds to a moderate crystalline fraction. Stiffness increases with density, while environmental stress crack resistance and impact behavior may decline if density is increased beyond the design window. The molecular weight distribution and short-chain branch content influence film toughness, draw-down behavior, and melt strength.
Which Melt-Pressure Signatures Indicate the Grade Is Outside Its Processing Window?
High-molecular-weight film extrusion demands close observation of melt pressure before the screen pack and at the die inlet. On a grooved-barrel single-screw extruder with L/D 30:1, the pressure drop across a clean screen pack is typically small. A progressive increase at constant screw speed suggests contaminant accumulation or insufficient barrel-feed cooling. The melt pressure signal may show low-frequency oscillations when the screw is starving or when the feed throat becomes bridged. For HDPE 5301AA, low melt-flow resin increases back pressure relative to general-purpose film grades. If the specific throughput drops below the extruder manufacturer’s turndown range, the bubble will show gauge variation and a wandering frost line.
Melt temperature should be measured in the adapter with a thermocouple exposed to the melt stream, not merely from barrel set points. If melt temperature rises above 230 °C under low screw-speed conditions, the residence time distribution broadens and oxidative degradation may begin. If melt temperature remains below 180 °C, melt homogenization may be incomplete and visible melt fracture can develop. The processing window is therefore bounded by the resin’s rheological response and the thermal stability of its stabilizer package.
Typical blown-film configurations for high-molecular-weight HDPE include a die gap of 0.8 mm to 1.2 mm, blow-up ratios of 3:1 to 5:1, and a high-stalk or pocket bubble geometry. A long-stalk process, where the bubble neck remains above the die, is often preferred because it allows the melt to cool before biaxial orientation. The low melt mass-flow rate of HDPE 5301AA supports high-stalk stability. Frost-line height must be matched to the cooling ring and air volume. If the frost line is set too low, the film may leave the bubble with residual heat and blocking can occur at the collapsing frame. If the frost line is too high, the bubble becomes unstable and the film gauge profile widens.
Film properties are conventionally measured after conditioning at 23 °C and 50 % relative humidity for 24 h. Tensile yield stress and elongation at break are measured on film or compression-moulded sheet according to ISO 527-2:2012. Dart impact is measured on a falling-dart apparatus conforming to ISO 7765-1:1998; the reported value is the dart mass required to fail 50 % of specimens. Elmendorf tear is measured according to ASTM D1922 in machine and transverse directions. For a low-melt-flow HDPE, machine-direction tear resistance can be lower than transverse-direction tear resistance because of orientation in the machine direction. Processing conditions that reduce draw-down ratio can narrow this directional difference.
When 5301AA Replaces a General-Purpose Film HDPE in Downgauged Structures
When a converter replaces a general-purpose film HDPE with HDPE 5301AA in a downgauged bag or liner structure, the low melt-flow rate can reduce output at equal screw speed and may require a longer die residence time. The benefit is the potential to maintain tensile and impact performance at lower film thickness; the penalty is a narrower process window. Screw speed, die-lip gap, blow-up ratio, and frost-line height should be changed together. Reducing die gap below 0.6 mm can increase shear rate and raise melt temperature, causing melt fracture and oxidation-related gels. Increasing die temperature alone may improve surface smoothness but can shorten the frost line and reduce downgauged film toughness.
Published data for this specific configuration is limited; therefore, commissioning trials should use a design-of-experiment matrix that includes screw speed, die temperature, blow-up ratio, and frost-line height. Film samples should be evaluated with ISO 527-2:2012 for tensile properties, ISO 7765-1:1998 for dart impact, and ASTM D1922 for tear resistance.
Differences from Blow-Moulding and Injection-Moulding HDPE Grades
HDPE 5301AA is not a direct substitute for blow-moulding HDPE. Blow-moulding grades are controlled at higher melt-flow rates to obtain parison hang strength and acceptable mould fill. The low melt-flow rate of 5301AA reduces flow at typical blow-moulding temperatures, which may cause incomplete pinch-off welds or thickened flash in moulding operations. In injection-moulding applications, HDPE grades with melt-flow rates above 5 g/10 min are generally required for thin-wall parts. The low-flow architecture of 5301AA would demand high melt temperatures and high injection pressures, making thin-wall filling impractical without an optimized hot-runner system.
The main differentiation is molecular-weight driven. Lower melt-flow HDPE resins provide better bubble stability and film impact; higher melt-flow HDPE resins provide lower pressure drop and faster cycle times. Selection must follow the conversion process rather than a single property table. The low melt mass-flow rate of 0.05 g/10 min places 5301AA outside the typical injection-moulding window and at the lower end of the blown-film extrusion range.
Target end uses for HDPE 5301AA include T-shirt bags, refuse sacks, industrial liners, and high-stiffness packaging films. In multi-layer structures, the resin can serve as the HDPE stiffening layer in coextruded films with LLDPE sealant layers. The layer ratio must be adjusted because the different melt strengths may cause interfacial instability if the HDPE layer is too thick relative to the LLDPE layer. Addition of reprocessed film scrap should be limited and controlled by gel count and melt-pressure monitoring; excessive recycled content may alter the molecular-weight distribution and degrade film appearance.
Regulatory compliance requires written confirmation from the producer or supplier. The following standards are commonly applied to high-density polyethylene used in packaging:
| Regulation or standard | Relevance |
|---|---|
| FDA 21 CFR 177.1520 | Olefin polymers for food-contact use |
| EU Regulation (EU) No 10/2011 | Plastic food-contact materials and migration testing |
| REACH Regulation (EC) No 1907/2006 | Monomer and additive registration; high-molecular-weight polymer exemption |
| RoHS Directive 2011/65/EU | Restricted heavy metals and brominated flame retardants |
| ASTM D1238 | Melt flow rate verification for incoming inspection |
The resin should not be blended with polar polymers such as polyethylene terephthalate or polyamide without evaluated compatibilization. The phases will separate and film properties will decline. Avoid contact with strong oxidizing acids and ketones under elevated temperature. Polyethylene is combustible and must be kept away from open flame and surfaces above 300 °C. During processing, ventilation is required because thermal decomposition products include aldehydes, ketones, and carbon monoxide depending on temperature and residence time.
