| HS Code | 534676 |
| Product Name | Arya Sasol HDPE 5520 |
| Polymer Type | High Density Polyethylene (HDPE) |
| Density | 0.955 g/cm³ |
| Melt Flow Rate 190 C 2 16 Kg | 20 g/10 min |
| Tensile Strength At Yield | 26 MPa |
| Elongation At Break | 600% |
| Flexural Modulus | 1100 MPa |
| Notched Izod Impact Strength | 40 J/m |
| Vicat Softening Temperature | 125 °C |
| Heat Deflection Temperature | 70 °C |
| Hardness Shore D | 65 |
| Environmental Stress Crack Resistance | 10 h |
| Melting Point | 130 °C |
| Crystallinity | 70% |
| Bulk Density | 0.55 g/cm³ |
| Water Absorption | <0.01% |
As an accredited Arya Sasol HDPE 5520 factory, we enforce strict quality protocols—every batch undergoes rigorous testing to ensure consistent efficacy and safety standards.
| Packing | Arya Sasol HDPE 5520 is supplied in 25 kg polyethylene-lined woven bags, palletized and stretch-wrapped for industrial shipment. |
| Container Loading (20′ FCL) | 20′ FCL loading: Arya Sasol HDPE 5520 in 25 kg PP bags, approx. 22 MT net, palletized/loose, securely stuffed for export. |
| Shipping | Arya Sasol HDPE 5520 ships as a non-hazardous polymer in 25 kg PP woven bags, palletized and stretch-wrapped. It is transported in 20 ft containers, typically 22 MT net. Store dry, cool, away from direct sunlight. No special dangerous goods documentation required. |
| Storage | Store Arya Sasol HDPE 5520 in a cool, dry, well-ventilated area, away from sunlight, heat, ignition sources, and strong oxidizers. Keep bags/packages closed, palletized, and off the floor. Protect from moisture, dust, contamination, and physical damage. Avoid prolonged UV exposure and excessive temperatures. Ensure good housekeeping and prevent static buildup. Use first-in, first-out stock rotation. Observe local regulations and the manufacturer’s SDS. |
| Shelf Life | Arya Sasol HDPE 5520 has a typical 24-month shelf life if stored dry, cool, ventilated, and out of direct sunlight. |
High-flow HDPE 5520 is conveyed from bulk silo through vacuum loaders into a central hopper only where condensation control is required; the nominal melt mass-flow rate of 20 g/10 min measured under ISO 1133-1 at 190 °C and 2.16 kg and density of 0.955 g/cm³ under ISO 1183-1 define the starting rheology for thin-wall dairy food packaging such as single-serve ice cream tubs, margarine containers, and snap-on lids. Food-contact qualification under EU No 10/2011 requires overall migration below 10 mg/dm² for the final article, while FDA 21 CFR 177.1520(c) applies to the olefin polymer base resin, and manufacturing hygiene is governed by EC 2023/2006. The addition ratio used at production scale is 96–98 wt% HDPE 5520 with 2–4 wt% titanium dioxide-based white masterbatch and 0.05–0.2 wt% slip/antistat concentrate; exceeding 4 wt% masterbatch loading can produce screw slip, unmelted pigment agglomerates, and inconsistent weight distribution in multi-cavity tools. The downstream injection moulding process employs accumulator-assisted hydraulic presses with screw L/D of 20:1–25:1, compression ratio of 2.2:1–2.5:1, injection velocity of 300–450 mm/s, melt temperature of 200–235 °C, mould temperature of 15–40 °C, and holding pressure of 40–70 MPa for wall thicknesses between 0.4 mm and 0.8 mm. Processing outside the upper melt-temperature boundary of 250 °C produces chain scission and surface yellowing; storage at ambient relative humidity above 60% without pre-drying can introduce condensation-induced silver streaking despite the non-hygroscopic nature of HDPE. The terminal part families are 150–250 mL round and rectangular ice-cream tubs, 500 g margarine bases, 1 L dairy spread containers, and nested snap-on lids that must maintain stacking load and rim dimensional stability.
The food-contact qualification matrix for HDPE 5520 in thin-wall dairy applications requires simultaneous confirmation of the following references:
| Standard | Scope | Control value | Production requirement |
|---|---|---|---|
| EU No 10/2011 | Plastic materials intended to contact food | Overall migration ≤ 10 mg/dm² | Neat HDPE 5520 or approved masterbatch only |
| FDA 21 CFR 177.1520(c) | Olefin polymers | Density 0.94–0.965 g/cm³; extractables per paragraph | No cross-contamination with non-olefin streams |
| EC 2023/2006 | GMP for food-contact materials | Traceability and process control | Metal detection and screen packs documented |
The tamper-evident band on injection-moulded HDPE closures demoulds within the cycle window only when ejection temperature is below 70–80 °C because the 20 g/10 min melt mass-flow rate yields lower part rigidity than 4–8 g/10 min closure grades; stripping rings or collapsing cores are therefore used instead of simple plate ejection. For non-carbonated still beverages, dairy drinks, and edible oil closures, the food-contact status relies on EU No 10/2011, FDA 21 CFR 177.1520, and EC 2023/2006, while dimensional interchangeability is checked to ISO closure thread drawings supplied by the brand converter. The formulation addition ratio is 97–99 wt% HDPE 5520 with 1–3 wt% slip/antiblock masterbatch and 0.1–0.3 wt% processing aid; slip loading is kept below the threshold where measurable surface bloom appears after 14 days at 40 °C. The downstream process consists of high-cavitation stack or cube tooling with hot runner valve gates, injection pressure of 80–120 MPa, melt temperature of 210–245 °C, and total cycle of 6–12 s depending on cavitation and cooling channel Reynolds number. Gate diameter at 0.6–1.2 mm prevents stringing, valve-gate sequencing ensures balanced filling, and mould release angles of at least 2° on the tamper-evident band core reduce deformation. Terminal finished goods are 28 mm, 30 mm, and 38 mm snap-on or screw closures for still mineral water, UHT milk, aseptic dairy, and edible oil. Carbonated soft-drink closures are excluded from the recommended application set because the stress-cracking resistance requirement under ASTM D1693 condition B for pressurised, low-pH environments is better satisfied by bimodal lower-MFR grades; published data for HDPE 5520 under that closure regime is limited.
Storage crate production on hydraulic machines with clamping force between 6,500 kN and 10,000 kN uses HDPE 5520 as the virgin phase in blends containing up to 20 wt% clean in-house regrind. Regulatory exposure for non-food housewares is governed by REACH 1907/2006, Directive 94/62/EC on packaging and packaging waste, and ISO 11469 material identification marking. The addition ratio for the main crate body is 96–100 wt% HDPE 5520 with 0–4 wt% colour masterbatch; regrind addition above 20 wt% decreases Charpy notched impact as evaluated by ISO 179-1 and raises the melt flow dispersion variance between shots. Moulding parameters are less sensitive than thin-wall food packaging: melt temperature 220–250 °C, mould temperature 20–50 °C, injection pressure 70–100 MPa, back pressure 0.5–1.5 MPa, and wall thickness 1.5–3.0 mm. Long flow paths in 600 mm-length crate sidewalls require gate placement at flow-length-to-wall-thickness ratios below 200:1 to avoid weld-line cracking at the base perimeter. Terminal products are stackable storage crates, distribution totes, household bins, and utility accessory boxes.
Injection moulding of pail lids between 120 mm and 300 mm diameter is run with hot runner valve gates at 3–6 drop positions depending on family tool layout; the high melt mass-flow rate of HDPE 5520 reduces filling pressure in multi-cavity lid tools but lowers long-term environmental stress-crack resistance relative to blow-moulding polyethylene grades used for pail bodies. The compliance matrix for industrial pail lids combines REACH 1907/2006, Directive 94/62/EC, and, where the filled pail is certified as dangerous-goods packaging, the chapter on plastics closures of the UN Recommendations on the Transport of Dangerous Goods. The addition ratio at the press is 96–98 wt% HDPE 5520, 2 wt% carbon black masterbatch for UV resistance, 0.5–1.5 wt% hindered amine light stabilizer masterbatch for outdoor exposure, and 0.1–0.3 wt% process lubricant. Moulding uses melt temperature of 230–260 °C, injection fill time of 1.5–2.5 s, packing pressure of 50–70 MPa, and cooling time of 10–18 s for lid weights between 35 g and 150 g. Demoulding requires positive mechanical ejection with core-side air assist to prevent lid skirt ovality above 0.5 mm. Terminal finished goods include flexible gasketed lids, tamper-evident tear-band lids, and accessory spouts or vent plugs for 5 L to 25 L containers. Full pail bodies for aggressive surfactant, solvent, or acid-containing products are not specified with this grade; body material should be a lower-MFR bimodal HDPE with notched ESCR under ASTM D1693 condition B above 100 h.
Living-hinge closures for cosmetic and personal-care bottles are gated at the top deck or directly adjacent to the hinge to orient flow parallel to the flex axis; this orientation preserves hinge ductility after repeated snapping. The polymer complies with REACH 1907/2006, and the finished closure is included in the brand safety assessment under Regulation (EC) No 1223/2009 Article 3 for packaging compatibility with the cosmetic formulation. The addition ratio is 98–99.5 wt% HDPE 5520 with 0.5–2 wt% colour masterbatch and 0.05–0.15 wt% external slip concentrate where surface lubricity must be controlled; material without added slip retains higher hinge fold resistance but may increase cap-to-bottle assembly friction. The downstream injection moulding process uses conventional cold-runner multi-cavity tools with melt temperature 200–230 °C, mould temperature 15–35 °C, injection velocity 100–300 mm/s, holding pressure 35–55 MPa, and hinge thickness 0.25–0.50 mm. A sharp hinge edge or unfavourable weld-line position reduces flexural endurance; the tool therefore uses rounded hinge corners and a gate position that prevents flow front collision within the hinge zone. Terminal part types are flip-top caps, disc-top closures, snap-hinge dispensing closures, and compact mirror or cream jar closures.
When HDPE 5520 replaces lower-MFR grades in thin-wall reusable transit trays, the chief process adjustment is reduced injection pressure at the same wall thickness; however, the substitution narrows the cold-temperature impact window and demands more precise control of regrind quality. The applicable structural and material standards are REACH 1907/2006, Directive 94/62/EC, and ISO 11469 marking; if the transit tray is used as secondary packaging for food, the migration limits of EU No 10/2011 apply only when the tray is intended for direct food contact. The addition ratio is 90–95 wt% HDPE 5520, 3–5 wt% colour or additive masterbatch, and 5–10 wt% post-industrial regrind from the same resin family. Moulding parameters for ribbed trays with nominal wall thickness 1.5–3.0 mm and rib thickness 3–6 mm include melt temperature 220–255 °C, mould temperature 20–50 °C, holding pressure 60–80 MPa, and cooling time tied to the thickest rib cross-section. Differential shrinkage between the thin panel and the rib causes top-surface sink marks; packing pressure is therefore held until gate freeze, and gas counterpressure or sequential valve gating is used in deep-draw tray configurations. Terminal products are collapsible crates, returnable beverage distribution trays, and thin-wall reusable transit boxes.
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On high-output injection moulding lines producing rigid packaging and closures, the choice of high-density polyethylene grade is frequently driven by melt flow rate and density rather than by tensile strength alone. Arya Sasol HDPE 5520 is a high-density polyethylene injection-moulding grade produced by Arya Sasol, with a nominal melt flow rate of 20 g/10 min at 190 °C under 2.16 kg load according to ISO 1133-1:2022, and a nominal density of 0.955 g/cm³ according to ISO 1183-1:2019. The material is intended for thin-wall articles, caps, overcaps, housewares, containers, and general-purpose injection-moulded items in which fast filling, short hold time, and consistent demoulding are the main production constraints. Its high melt flow relative to standard blow-moulding or pipe grades reduces injection pressure and shortens the apparent relaxation time, but the same molecular characteristics lower environmental stress crack resistance and melt strength.
At 190 °C and 2.16 kg, the 20 g/10 min melt flow rate places HDPE 5520 in the high-flow segment of high-density polyethylene injection-moulding materials. Extrusion blow-moulding HDPE grades typically exhibit melt flow rates from 0.3 g/10 min to 2 g/10 min, while fractional-melt pipe grades often fall below 0.5 g/10 min. The viscosity difference is therefore an order of magnitude or more in low-shear flow. During injection, this lower viscosity allows a melt front to cross long flow paths in thin walls, but it also reduces parison stability and melt strength; HDPE 5520 is therefore not a substitute for blow-moulding or pipe extrusion in processes requiring a self-supporting melt.
Capillary rheometry data for this specific grade has not been widely republished in full shear rate sweeps. However, the melt flow rate alone indicates that the shear viscosity at 190 °C and shear rates above 100 s⁻¹ will be substantially lower than that of a 0.7 g/10 min blow-moulding HDPE of similar density. The practical consequence on an injection line is measurable: a given spiral mould or thin-wall cavity fills at lower hydraulic pressure, or fills further at fixed pressure. The same property shortens gate freeze-off time, which can permit earlier hold-pressure release but also narrows the processing window for packing thick sections.
In a typical 120-tonne hydraulic injection-moulding machine with a 24:1 L/D general-purpose polyolefin screw and a compression ratio of 2:1 to 2.5:1, the grade is processed with a barrel profile that can begin at 180 °C in the rear zone and reach 220 °C to 230 °C in the metering zone. Melt temperature should be maintained in the range of 210 °C to 240 °C; below 210 °C, viscosity rises and mould fill may become pressure-limited, while above 240 °C, surface defects, odour, and discolouration risk increase. Mould temperatures between 15 °C and 40 °C are suitable for many fast-cycle applications, with the lower segment favouring shorter cooling time and the upper segment improving surface gloss and weld-line strength. Because HDPE is not hygroscopic, pre-drying is not normally required, but resin stored in humid conditions or exposed to temperature swings that create condensation should be dried at 70 °C to 80 °C for 2 h before processing to avoid surface splay.
Injection speed should be set to achieve a flow-front velocity that prevents hesitation marks and premature gate freeze in thin sections, but not so high that shear heating drives local melt temperature above the degradation threshold. For a 0.8 mm to 1.2 mm wall section, holding pressure is typically 50 % to 70 % of injection peak pressure and is maintained only until gate seal; continued holding after gate freeze wastes cycle time without improving dimensional stability. Back pressure in the range of 5 bar to 15 bar hydraulic is sufficient to homogenise the melt, while higher back pressure may increase melt temperature and degrade the polymer. Screw rotational speed should be adjusted so that dosing is completed within the cooling time of the tool, avoiding prolonged melt residence time at elevated temperature.
Gate design and runner sizing are critical because the grade’s lower viscosity permits smaller gates than a fractional-melt HDPE, but gate diameters below 0.5 mm can freeze off before the packing phase. For edge-gated thin-wall parts, land lengths should be kept short, and the gate area should be sized against the filled volume and injection rate. Hot-runner systems with external heating can maintain the melt front at the gate, but the nozzle temperature should remain below 240 °C to minimise degradation in the hot runner.
Lot-to-lot variation in melt flow rate and density should be monitored with ISO 1133-1:2022 and ISO 1183-1:2019 at incoming inspection. Shifts in melt flow rate of more than ±2 g/10 min may require adjustment of barrel temperature or injection speed to keep cushion and part weight stable, but such adjustments should be made only after confirming the deviation on properly conditioned samples. The moisture content of HDPE is typically below 0.01 %, so drying is only required to remove surface condensation.
The 0.955 g/cm³ density of HDPE 5520 gives a semicrystalline polyolefin morphology with a balance between stiffness, toughness, and dimensional change during cooling. Table 1 summarises representative property values from producer technical literature. These values are not specification limits and should be verified lot by lot on conditioned specimens.
| Property | Test method | Typical value |
|---|---|---|
| Melt flow rate, 190 °C/2.16 kg | ISO 1133-1:2022 | 20 g/10 min |
| Density | ISO 1183-1:2019 | 0.955 g/cm³ |
| Tensile stress at yield | ISO 527-2:2012, type 1A, 50 mm/min | 26 MPa |
| Tensile strain at yield | ISO 527-2:2012 | 9 % |
| Flexural modulus | ISO 178:2019 | 1000 MPa |
| Notched Izod impact strength, 23 °C | ISO 180:2023, method A | 4 kJ/m² |
| Vicat softening temperature, A50 | ISO 306:2022 | 126 °C |
| Shore D hardness, 15 s | ISO 868:2003 | 61 |
When comparing these values with extrusion blow-moulding HDPE resins of similar density, the tensile yield strength is often similar, but the flexural modulus and hardness may be slightly higher due to the rapid cooling of injection-moulded test plaques. The notched impact value of a high-flow HDPE should not be interpreted as a guarantee of performance in chilled-mould thin-wall parts; weld lines, sharp internal corners, and frozen-in orientation can reduce practical impact resistance by more than the notched laboratory value would suggest.
Mould surface temperature has a disproportionate effect on the surface aesthetics and final dimensions of HDPE 5520 parts. With a mould temperature below 20 °C, the skin freezes quickly and may produce a dull surface, particularly in thin-wall lids with a high flow path-to-wall thickness ratio. Raising the mould temperature to 30 °C or 40 °C reduces the frozen skin thickness and improves replication of textured surfaces, but it increases cooling time and can increase mould shrinkage in the thickness direction. The practical operating band for high-gloss packaging closures is therefore not set by melt temperature alone but by the interaction of cooling rate, cavity pressure, and gate seal time.
Mould shrinkage for this grade is typically 1.5 % to 2.5 % when measured on plaques per ISO 294-4:2018, with thicker sections approaching or exceeding 3 %. Post-mould crystallisation can continue for several hours; dimensional checks should be performed after conditioning at 23 °C and 50 % RH for at least 24 h. Consistent hold time and gate seal are therefore more important than barrel temperature alone for controlling part-to-part dimensional variation.
Arya Sasol HDPE 5520 is used in thin-wall food and non-food packaging, beverage closures, overcaps, housewares, pails and containers, and high-cavitation injection moulds where the runner and gate system must fill rapidly without excessive clamp force. In multi-cavity tools with hot runners and valve gates, the grade’s lower melt viscosity helps to balance cavities, but it can also exaggerate drooling from open nozzles if the decompression stroke or valve-gate sequence is not correctly set. The product is less suitable for thick-walled industrial parts requiring long-term creep resistance, for large-diameter pressure pipe, or for extrusion profiles where melt strength is the critical processing variable.
Compared with rotomoulding grades, which are typically in the 4 g/10 min to 8 g/10 min range and are ground to a fine powder for oven cycling, HDPE 5520 has a higher melt flow and is supplied in pellet form for injection moulding. The external cooling and long oven residence time used in rotational moulding would not exploit the grade’s fast injection properties and would likely produce unacceptable bubble and porosity defects. It is similarly not intended for film blowing because of low melt strength and poor bubble stability.
The higher melt flow of HDPE 5520 corresponds to a lower average molecular weight and limited chain entanglement compared with blow-moulding HDPE grades. Environmental stress crack resistance measured under ASTM D1693-21 therefore decreases as melt flow rate increases. The grade is not intended for detergent bottles, jerry cans exposed to cyclic loading, or containers that must withstand long-term internal pressure and stress-cracking agents. For closures and overcaps, the primary failure modes are usually excessive tightening torque, low-temperature impact, or fatigue failure of the hinge strap; in those cases, resin selection must be verified by part-level tests rather than resin data sheets alone.
The relationship between melt flow rate and environmental stress crack resistance is well documented for high-density polyethylene. A resin with a melt flow rate near 20 g/10 min has shorter chains and fewer tie molecules than a 0.3 g/10 min blow-moulding grade, which reduces the time to failure under constant strain and surfactant exposure. In practice, HDPE 5520 should be limited to closures and packaging where external loads are low and stress-cracking agents are absent or present only for short contact periods. If an application requires continuous contact with household cleaners or oils, a lower melt flow rate HDPE with a published environmental stress crack resistance value above 100 h under ASTM D1693-21, condition A or B, may be required. If published environmental stress crack resistance data for this specific grade is limited, the converter should run a comparative test under the intended product geometry rather than extrapolating from resin class alone.
Chemical resistance follows general high-density polyethylene behaviour: resistance to many aqueous acids, alkalis, and polar solvents is adequate at ambient temperature, but strong oxidising acids, aromatic and chlorinated hydrocarbons, and some oils can soften or swell the material. The final article must be tested under the actual chemical environment, concentration, temperature, and stress state. Regulatory compliance for food-contact applications can be evaluated under FDA 21 CFR 177.1520 for olefin polymers and under European Commission Regulation (EU) No 10/2011; however, final conformity depends on additives, colourants, and overall migration testing on the finished article. The grade may also be assessed under REACH and RoHS obligations in the relevant jurisdictions.
Table 2 compares the processing and design profiles of HDPE 5520 with two common high-density polyethylene categories.
| Parameter | Arya Sasol HDPE 5520 | Extrusion blow-moulding HDPE | Pipe HDPE / PE 100 |
|---|---|---|---|
| Nominal melt flow rate, 190 °C/2.16 kg | 20 g/10 min | 0.3–2 g/10 min | 0.2–0.5 g/10 min |
| Density range | 0.955 g/cm³ | 0.949–0.956 g/cm³ | 0.959–0.961 g/cm³ |
| Melt strength | Low; unsuitable for parison extrusion | High; supports parison during blowing | Very high; resists sag in large-diameter pipe |
| Environmental stress crack resistance | Moderate to low; not for detergent or surfactant packages | High; suitable for household chemical bottles | High; designed for long-term pressure service |
| Primary processing window | Injection moulding at 210–240 °C melt temperature | Blow moulding at 170–200 °C melt temperature | Pipe extrusion at 190–230 °C melt temperature |
The selection boundary between injection moulding and blow moulding is therefore governed by melt strength and environmental stress crack resistance. HDPE 5520 is a dedicated injection-moulding grade: its high flow enables fast filling and short cycles in thin-wall tools, but it is not interchangeable with lower-melt-flow HDPE grades intended for continuous stress-bearing or parison-forming processes. This distinction, rather than density alone, defines the operational limits of the product.
