| HS Code | 512600 |
| Density | 0.955 g/cm³ |
| Melt Flow Rate | 0.30 g/10 min (190°C/2.16 kg) |
| Tensile Strength At Yield | 29 MPa |
| Tensile Strength At Break | 30 MPa |
| Tensile Elongation At Break | 600% |
| Flexural Modulus | 1200 MPa |
| Notched Izod Impact Strength | 80 J/m |
| Shore D Hardness | 66 |
| Vicat Softening Temperature | 124°C |
| Heat Deflection Temperature | 75°C at 0.45 MPa |
| Brittleness Temperature | -70°C |
| Environmental Stress Crack Resistance | 1000 h |
| Melting Point | 134°C |
| Mold Shrinkage | 1.5–3.0% |
| Thermal Conductivity | 0.45 W/m·K |
As an accredited Asahi Kasei HDPE SUNTECH B470 factory, we enforce strict quality protocols—every batch undergoes rigorous testing to ensure consistent efficacy and safety standards.
| Packing | Asahi Kasei HDPE SUNTECH B470 is supplied in 25 kg polyethylene-lined paper bags, palletized and stretch-wrapped for industrial shipment. |
| Container Loading (20′ FCL) | Container Loading (20′ FCL) for Asahi Kasei HDPE SUNTECH B470: typically 25 kg bags, palletized, securely stowed for safe ocean shipment. |
| Shipping | Asahi Kasei HDPE SUNTECH B470 is a non-hazardous high-density polyethylene resin. It is typically shipped in 25 kg bags, jumbo bags, or bulk containers under ambient conditions. No UN hazmat class is required. Keep dry, cool, and away from moisture, direct sunlight, heat, and ignition sources. |
| Storage | Store Asahi Kasei HDPE SUNTECH B470 in a cool, dry, well-ventilated area, away from direct sunlight, heat, sparks, and flames. Keep bags or containers tightly sealed, palletized, and off the floor to prevent moisture, dust, and contamination. Avoid contact with strong oxidizing agents. Maintain stable temperature and humidity; use first-in, first-out inventory. Follow local regulations and manufacturer’s safety data sheet. |
| Shelf Life | Typically two years when stored unopened in original packaging under cool, dry conditions, protected from direct sunlight and heat. |
For 20 L to 220 L UN 1H1/1H2 packagings, processing of Asahi Kasei HDPE SUNTECH B470 on accumulator-head extrusion blow moulding lines is governed by packaging performance requirements in UN Model Regulations Chapter 6.1, 49 CFR §178.509, ADR 6.1 and the IMDG Code for dangerous goods transport. Lot-release density is controlled by ISO 1183-1 within the HDPE blow moulding window of 0.947–0.949 g/cm³, and melt flow rate is measured at 190 °C/21.6 kg under ISO 1133-1:2022 rather than at 2.16 kg because the high molar mass of B470 places low-load values below the resolution required for lot discrimination. Formulation practice on converting lines blends 96–98 wt% B470 with 2–4 wt% carbon black or pigment masterbatch and 0.5–1.5 phr of a stabilised polyethylene carrier masterbatch; the black masterbatch level is adjusted only after drop testing because concentrate above 4 wt% can reduce notched impact resistance measured by ISO 179-1:2010. Extrusion is performed on grooved-feed barrier screws of 24:1–30:1 L/D, with melt temperatures held at 190–220 °C and die head temperatures at 190–210 °C; parison programming controls wall thickness between 1.2 mm and 3.5 mm, while chilled-water moulds at 8–25 °C maintain the pinch-off weld later subjected to hydrostatic pressure testing. Typical finished articles are 20 L, 25 L and 30 L tight-head jerricans plus 60 L, 120 L, 200 L and 220 L open-head or tight-head drums, all requiring environmental stress crack resistance measured by ASTM D1693-15 against aliphatic hydrocarbons and oxygenated solvent formulations. Published lot-specific data for B470 in every packaged chemical class is limited, so end users must run compatibility testing with the actual filling material and the final wall thickness, particularly for high-pH cleaning formulations where crack acceleration is known on production lines.
In coextruded fuel tank production, Asahi Kasei HDPE SUNTECH B470 serves as both the outer and inner structural layers, while permeation resistance is contributed by an ethylene-vinyl alcohol copolymer barrier layer. Compliance is determined by ECE R34 mechanical and permeation tests, 49 CFR §571.301 fuel system integrity, CARB LEV III evaporative emission limits and EPA 40 CFR Part 86 test methods; material qualification additionally references ISO 527-2:2012, ISO 179-1:2010 and ASTM D1693-15 for environmental stress crack resistance. A six-layer stack is assembled with the outer HDPE layer taking 35–45% of total wall thickness and containing 70–80 wt% B470, 20–30 wt% clean process regrind and 2–3 wt% carbon black masterbatch; adhesive tie layers account for 2–4% each and use maleic anhydride-grafted HDPE; the EVOH barrier occupies 2–5% of thickness and is selected with 27–32 mol% ethylene content to prevent excessive viscosity mismatch with B470; the inner HDPE layer uses 100 wt% B470 or a 90–95 wt% B470 plus 5–10 wt% regrind split when contact with alcohol-aggressive fuels is not required.
| Layer | Thickness share | Typical material split |
|---|---|---|
| Outer HDPE | 35–45% | 70–80 wt% B470, 20–30 wt% regrind, 2–3 wt% carbon black masterbatch |
| Adhesive tie | 2–4% | Maleic anhydride-grafted HDPE |
| EVOH barrier | 2–5% | 27–32 mol% ethylene EVOH |
| Adhesive tie | 2–4% | Maleic anhydride-grafted HDPE |
| Inner HDPE | 20–40% | 100 wt% B470 or 90–95 wt% B470 plus 5–10 wt% regrind |
Production-scale six-extruder accumulator blow moulding lines run the HDPE zones at 200–220 °C, tie layers at 190–210 °C and EVOH at 185–195 °C to avoid gel formation; the die head is held at 200–210 °C. For a 70 L tank, clamp force is typically 1000–1500 kN, and mould cooling water is set at 8–15 °C. Layer thickness distribution is controlled by gravimetric extruder output rather than melt pressure alone, because pressure shifts at the accumulator head can mask local layer thinning. The terminal articles are passenger-car fuel tanks, motorcycle fuel cells, marine fuel tanks and small-engine reservoirs; the main operational boundary is that regrind above 30 wt% in the outer layer reduces ESCR and should not be used when fuel contains aggressive oxygenated blends unless recertified by ASTM D1693-15.
For 1000 L composite intermediate bulk containers and larger chemical storage tanks, Asahi Kasei HDPE SUNTECH B470 is processed into thick-walled inner bottles where drop resistance and weld-line integrity are the critical qualifiers. The applicable regulatory framework is UN Model Regulations Chapter 6.5 for 31HA1 composite IBCs, 49 CFR §178.703, ADR 6.5 and the drop-test methodology prescribed for IBC packaging in the UN transport requirements; long-term outdoor storage additionally uses ASTM D1998-15 for polyethylene upright storage tanks and ASTM G154 for UV conditioning. Formulation is typically 93–97 wt% B470, 2–4 wt% UV stabiliser masterbatch, 0.5–1.0 wt% antioxidant masterbatch and 1–2 wt% pigment masterbatch, with the UV package adjusted in 0.5 phr increments only after ISO 4892-2 or ASTM G154 exposure demonstrates that tensile impact and ESCR remain within specification. Large-part blow moulding uses accumulator heads with die diameters from 120 mm to 180 mm, parison lengths up to 2000 mm, melt temperatures of 185–210 °C and wall thicknesses between 3 mm and 6 mm; because thick walls prolong cooling, moulds are operated at 12–20 °C and post-mould cooling jigs are required to prevent warpage at the pinch-off. Finished product types include 500 L to 3000 L vertical and horizontal storage tanks, 1000 L IBC inner bottles and chemical dosing tanks for acid and alkali formulations that require high ESCR rather than hydrocarbon solvent barrier performance.
Cold-water contact applications under NSF/ANSI/CAN 61 impose migration and extraction constraints that are met by selecting a high-molecular-weight HDPE with a low catalyst-residue profile and by restricting formulation additives to approved masterbatches. In the EU, Regulation (EC) No 1935/2004 and Commission Regulation (EU) No 10/2011 apply to plastics intended for food or water contact, and the overall migration limit of 10 mg/dm² must be verified by the prescribed simulant testing; additional market-specific schemes such as WRAS BS 6920-1:2018 and AS/NZS 4020:2018 govern potable water components in the United Kingdom and Australia. Formulation for potable water tanks blends 97–99.5 wt% B470 with 0.5–2.0 wt% blue or natural white pigment masterbatch and 0.3–1.0 wt% stabiliser masterbatch, while reclaimed material is excluded from the water-contact layer unless explicitly approved by the relevant national certification body. Single-layer or two-layer extrusion blow moulding is run at melt temperatures of 190–215 °C, mould cooling water at 10–20 °C and wall thicknesses of 2–8 mm; the pinch-off weld must be hydrostatically tested after moulding because delamination or thinning at the pinch-off is a known leak initiation site in field returns. Terminal products are 10 L to 200 L potable water storage tanks, caravan and motorhome water tanks, and marine fresh-water reservoirs. Continuous service is normally limited to water at or below 60 °C; use above this threshold or under pressure-cycling conditions requires a separate design review because creep resistance and weld integrity shift outside the typical HDPE potable-water operating window.
When blow moulded tanks are intended for AUS 32 diesel exhaust fluid, the urea-water solution introduces ionic conductivity and long-term wet contact that can accelerate surface microcracking if the incorrect masterbatch chemistry is used. The applicable product standard is ISO 22241-2:2019 for diesel engines NOx reduction agent AUS 32, with handling and storage conditions referenced in ISO 22241-3:2017; transport packaging, where applicable, must also satisfy UN Model Regulations Chapter 6.1 because DEF is not classified as dangerous goods but the packaging must retain mechanical integrity under vehicle vibration. Formulation is typically 96–98 wt% B470, 1–2 wt% white or light-coloured masterbatch, 0.2–0.6 phr hindered amine light stabiliser masterbatch and 0.1–0.4 phr antioxidant masterbatch; copper-based pigments are excluded because copper ion release can compromise AUS 32 stability under ISO 22241-2:2019 quality limits. Single-layer accumulator blow moulding is performed at melt temperatures of 185–215 °C, wall thicknesses of 2–5 mm and mould temperatures of 10–20 °C; post-mould ageing for 24 h at ambient temperature is used before drop testing to allow crystalline development and dimensional stabilisation. Terminal product types are 10 L to 60 L vehicle DEF tanks, agricultural machinery reservoirs and storage drums for AUS 32 distribution. Published lot-specific UV ageing data for B470 in DEF tank formulations are limited; therefore end users should benchmark each masterbatch combination by ASTM G154 and by cyclic urea exposure per ISO 22241-2:2019 rather than relying on generic HDPE kinetic assumptions.
In 1 L to 20 L agrochemical and institutional cleaning product bottles, the role of Asahi Kasei HDPE SUNTECH B470 is to resist environmental stress cracking caused by nonionic surfactants, aromatic solvents and emulsified formulations. Packaging compliance references UN Model Regulations Chapter 6.1 for dangerous goods, EU CLP Regulation (EC) No 1272/2008 for classification and labelling, and US EPA FIFRA packaging requirements for registered agricultural chemicals. Formulation typically combines 93–97 wt% B470 with 1–3 wt% pigment masterbatch and 0.5–1.5 phr of a polyethylene-based processing aid or compatibiliser masterbatch; high-viscosity B470 is selected specifically because lower molecular weight HDPE grades crack prematurely in surfactant-loaded formulations under the bent-strip conditions of ASTM D1693-15. Intermittent extrusion blow moulding on shuttle or accumulator-head machines uses melt temperatures of 180–210 °C, wall thicknesses of 1.0–3.0 mm and mould temperatures of 8–18 °C; leak detection and drop testing are performed inline because pin holes near the flash line are the dominant defect mode observed on high-cavity tooling. Terminal product types include agrochemical bottles, detergent and disinfectant bottles, institutional cleaning product packs and specialty bleach containers requiring a narrow neck finish and graduated dosing features.
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Asahi Kasei HDPE SUNTECH B470 is a high-density polyethylene grade positioned within the SUNTECH blow-moulding series for large-part industrial packaging and technical hollow bodies. The grade is selected for extrusion blow moulding of containers in the 20 L to 220 L capacity range, particularly where the packaged chemistry includes surfactants, mild oxidising agents, agricultural adjuvants, or detergent formulations. Converters specify B470 when parison melt strength, pinch-off weld integrity, and environmental stress cracking resistance carry more weight than high flow or rapid cycle time. Published lot-specific data for this exact configuration is limited in open databases; therefore, the numerical ranges given here are class-typical for high-molecular-weight HDPE blow-moulding resins unless a specific standard is cited, and the current Asahi Kasei technical datasheet should govern final process parameters.
The primary differentiator is the melt rheology. A blow-moulding grade such as SUNTECH B470 is engineered for low melt flow rate under ISO 1133-1:2022, high zero-shear viscosity, and a pronounced shear-thinning response in the die land. Injection-moulding HDPE grades with melt flow rates above 5.0 g/10 min cannot sustain the parison weight of a 60 L to 200 L drum without visible sag, while film grades draw down too quickly in a moulding die. The B470 class is therefore not interchangeable with high-flow HDPE for thin-wall caps, closures, or packaging film. Its high-molecular-weight tail contributes to die swell and parison diameter stability, but it also narrows the operating temperature window and increases back-pressure on single-screw extruders.
Compared with general-purpose blow-moulding HDPE at a melt flow rate below 1.0 g/10 min, the B470 position is defined by higher environmental stress cracking resistance, allowing use in containers for detergent and agrochemical formulations that would otherwise produce brittle failure in lower-ESCR grades. A film-grade high-density polyethylene with a melt flow rate of 1.0 g/10 min to 3.0 g/10 min produces thin-gauge webs at high draw rates but lacks the melt stiffness required for blow-moulded sidewalls. Injection-moulding grades offer shorter cycle time but have higher warpage risk in large hollow parts because of anisotropic shrinkage and lower melt strength at the freeze-off point.
On accumulator-head machines with screw diameters of 80 mm to 120 mm and 24:1 to 30:1 L/D ratios, the processing envelope for high-molecular-weight HDPE blow-moulding resins is set by head pressure, melt temperature, and parison programming. A typical barrel profile begins with a feed-zone set point of 170 °C to 180 °C, rising to 200 °C to 220 °C in the metering zone and head. The melt should not be allowed to exceed 230 °C for prolonged residence time, because oxidative chain scission reduces molecular weight and ESCR even if visual discolouration is absent. Screw designs with a barrier section and a Maddock-style mixing element are preferred for homogenising the high-viscosity melt; an open-channel general-purpose polyolefin screw of 20:1 L/D typically produces melt-temperature variation above ±5 °C, which appears as inconsistent parison weight and wall-thickness variation on containers above 50 L.
Parison programming is critical. The resin’s high-molecular-weight tail increases die swell, but it also makes the parison sensitive to hang time in shuttle and accumulator machines. To maintain wall thickness in the upper container area, the die gap is programmed over 50 to 100 points, starting with a wider gap for the top and bottom pinch zones and a narrower gap for the body. On a 200 L drum, a hang time above 8 s to 10 s can cause a visible reduction in sidewall thickness near the centre; operators compensate by raising die temperature or reducing pre-blow delay, but both actions shift the pinch weld location. In practice, blow air pressure of 0.7 MPa to 1.0 MPa and mould temperature of 10 °C to 25 °C are used to lock wall thickness and reduce cooling time. High mould cooling with very low melt temperature can create frozen-in orientation that reduces ESCR in the pinch-off seam.
Drying is not normally required for HDPE processed as dry pellets; the operational limitation is condensation on cold pellets entering a warm feed throat when relative humidity exceeds 60 %, and that condition is resolved by hopper insulation or 1 h to 2 h pre-conditioning at 60 °C to 70 °C.
The pinch-off seam in large blow-moulded containers is the zone where the parison is compressed between mould halves. For a high-molecular-weight HDPE such as SUNTECH B470, cold mould surfaces can quench the seam before complete fusion, leaving a weak line that appears as a crack under drop impact at −20 °C. The most common production failure is not a wall-thickness fault but a seam that opens during top-load or side-impact testing. To prevent this, mould temperatures are kept above 10 °C in the pinch region and the parison closure speed is set to avoid excessive melt draw at the parting line. On accumulator machines, the closure force required for a 60 L container is typically in the 150 t to 250 t range, but the critical parameter is not total force; it is the alignment of the pinch insert and the sharpness of the flash land. A damaged or blunt flash land produces a thick flash pocket that acts as a stress concentrator and increases the probability of seam splitting.
Cooling-rate conflicts arise because rapid cooling increases productivity but reduces the time available for crystal formation and molecular relaxation. A reduction in ESCR at the inner wall can occur when the outer wall is quenched to 10 °C while the inner wall remains above the crystallisation temperature. The sectional modulus then becomes asymmetric, and the part may display uneven top-load collapse. Converters running SUNTECH B470 in thick-walled tank applications therefore set cooling water temperature to the upper end of the permitted range and use a post-mould cooling fixture to maintain dimensional stability without over-quenching the seam.
ESCR is the primary performance differentiator for SUNTECH B470 in aggressive packaging. The test is usually conducted according to ASTM D1693-21 with 100 % Igepal CO-630 at 50 °C, and the reported value is the time to 50 % failure. Higher-molecular-weight HDPE blow-moulding grades display an ESCR response that is highly sensitive to residual catalyst package, comonomer placement, and the degree of orientation frozen into the part. For containers that hold laundry detergents, agricultural emulsifiable concentrates, or industrial cleaners, the failure of a low-ESCR grade appears as a branched crack near the bottom corner or pinch seam after several weeks of contact. The B470 class is designed to extend that time by limiting the concentration of high-stress molecular structures at the surface and by using a comonomer distribution that increases tie-molecule density.
ESCR is not an infinite-life property. A formulation containing strong aromatic solvents or chlorinated hydrocarbons can still produce environmental stress cracking unrelated to the resin’s intrinsic ESCR; such packaging requires barrier treatment or fluorination and should not be assigned to an unmodified HDPE grade without testing under the specific chemical composition and fill level. Additional quality controls include density via ISO 1183-1:2019 and flexural modulus via ISO 178:2019, but neither parameter substitutes for ESCR. A higher-density HDPE may provide slightly higher stiffness and top-load strength, yet it often reduces ESCR because of the same crystalline structure that increases modulus. The B470 grade is therefore positioned in the mid-density HDPE range to maintain enough stiffness for drum handling while retaining the ESCR needed for detergent and agrochemical packaging. This trade-off is a known cliff-edge: raising density by as little as 0.005 g/cm³ through additive or processing changes may be sufficient to alter ESCR from a pass to a fail in a demanding chemical environment.
| Control area | Reference | Relevant limit or condition |
|---|---|---|
| Melt mass-flow rate | ISO 1133-1:2022 | Low-flow blow-moulding class; lot-specific value from certificate of analysis |
| Density | ISO 1183-1:2019 | Mid-density HDPE range; verify against datasheet |
| Tensile yield | ISO 527-2:2012 | Short-term load resistance; compare with top-load test |
| ESCR | ASTM D1693-21 | Time to 50 % failure under 100 % Igepal at 50 °C |
| Food contact | FDA 21 CFR 177.1520(c) | Olefin polymers; extraction limits by food type |
| EU food contact | Regulation (EU) No 10/2011 | Overall migration limit 10 mg/dm²; specific migration for additives |
| RoHS | Directive 2011/65/EU | Pb 1000 ppm, Hg 1000 ppm, Cd 100 ppm, Cr(VI) 1000 ppm, PBBs/PBDEs 1000 ppm |
| REACH | Regulation (EC) No 1907/2006 | SVHC restrictions apply to finished articles; verify candidate list status |
The table above should not be read as a certificate of analysis. It is a control framework used by converters when qualifying HDPE SUNTECH B470 for regulated packaging. A certificate of analysis from Asahi Kasei or its distributor must be obtained for each lot because residual additive composition and catalyst neutralisation can vary between production campaigns. For food-contact use, the converter must also verify that the additive package in the final compound does not exceed the migration limits under the indicated regulation; the resin seller’s compliance statement does not cover downstream masterbatch colourants or processing aids added by the converter.
Additive incompatibility is limited but not zero. Strong oxidising process aides or residual solvents from cleaning compounds can generate free radicals at melt temperatures above 200 °C, reducing molecular weight and ESCR. The resin should not be dry-blended with metal stearates above the level required for acid scavenging because excessive lubrication can reduce screw friction and cause feed-zone surging. For UV-stabilised outdoor containers, a carbon black masterbatch is preferred over HALS-only systems when the part must meet long-term outdoor exposure requirements under ISO 4892-2, because carbon black also reduces oxidative degradation in thick sections.
The continuous-use temperature for an unmodified HDPE blow-moulding grade is ordinarily below 60 °C under chemical load. Applications that require continuous exposure to hot aggressive media above this boundary should be reassigned to a high-density polyethylene with a higher thermal stabiliser package, a crosslinked polyethylene, or an alternative polymer, because creep modulus and ESCR both decline with increasing temperature. SUNTECH B470 is not a high-temperature resin; it is intended for ambient and intermittent moderate-temperature use.
A production line converting SUNTECH B470 into 60 L-class open-top drums monitors shot weight, parison length, flash thickness, and pinch-seam temperature as indirect indicators of melt-quality stability. When shot weight drifts by more than 2 % at constant barrel temperature and screw speed, the cause is often a worn screw or a blocked screen pack, not resin variation. In such a case, replacing a general-purpose screw with a barrier screw of the same diameter but 25:1 L/D can restore melt homogeneity and reduce wall-thickness variation in the upper sidewall. The operational boundary for B470 is therefore defined by the combination of high melt strength, controlled die swell, and ESCR; these properties reduce field failure in large containers where seam splitting or stress cracking can create a hazardous waste-release risk.
