| HS Code | 478164 |
| Polymer Type | High Density Polyethylene (HDPE) |
| Comonomer | Hexene-1 |
| Density | 0.950 g/cm³ |
| Melt Index | 0.35 g/10 min (190°C/2.16 kg) |
| Melting Point | 130 °C |
| Tensile Strength At Yield | 26 MPa |
| Elongation At Break | 600% |
| Flexural Modulus | 1200 MPa |
| Vicat Softening Point | 125 °C |
| Heat Deflection Temperature | 70 °C |
| Environmental Stress Crack Resistance | >1000 h |
| Hardness Shore D | 65 |
As an accredited Chevron Phillips Chemical HDPE 9503HF factory, we enforce strict quality protocols—every batch undergoes rigorous testing to ensure consistent efficacy and safety standards.
| Packing | Chevron Phillips Chemical HDPE 9503HF comes in 25 kg (55 lb) bags, typically 40 bags per pallet (1,000 kg). |
| Container Loading (20′ FCL) | 20′ FCL container loaded with Chevron Phillips Chemical HDPE 9503HF in 25-kg bags, palletized and shrink-wrapped for secure transport. |
| Shipping | Chevron Phillips Chemical HDPE 9503HF typically ships as non-hazardous high-density polyethylene pellets in 25 kg bags, 1,000 kg octabins, or bulk trucks/railcars. Transport in cool, dry, clean conditions, avoiding moisture, direct sunlight, heat, and contamination. No special DOT/IMDG hazard classification; use standard industrial handling. Store indoors, keep sealed until use, and follow supplier safety data sheet. |
| Storage | For Chevron Phillips Chemical HDPE 9503HF, store in original, sealed containers in a cool, dry, well-ventilated area at ambient temperature, away from direct sunlight, heat, and ignition sources. Keep bags on pallets, off the floor, and protect from moisture, dust, and contamination. Avoid strong oxidizers. Maintain good housekeeping, follow SDS/local regulations, and rotate stock first-in, first-out. |
| Shelf Life | Chevron Phillips Chemical HDPE 9503HF has indefinite shelf life if stored cool, dry, and clean, away from sunlight and contaminants. |
The conversion of Marlex 9503HF into thin-wall food packaging is controlled by melt-front velocity, cavity-pressure decay, and the organoleptic constraints of the finished article. The resin is processed on accumulator-assisted hydraulic injection machines with clamp force typically between 200–350 metric tons, screw L/D 20:1–24:1, and shot capacity held to 40–60% of barrel volume to limit residence time. Melt temperature is maintained at 200–235°C, mold temperature at 12–28°C, and peak injection pressure at 90–130 MPa; these conditions permit wall sections of 0.35–0.80 mm and flow-length-to-thickness ratios above 180:1 without short shots when the gate is placed at the thickest section. The formulation for food-contact conversion starts with 100 phr of 9503HF, a 60% TiO₂ white masterbatch at 1.0–3.0 wt%, slip/antiblock masterbatch at 0.05–0.15 wt%, and zinc stearate acid scavenger at 0.02–0.06 phr; additives must be selected from food-contact-cleared masterbatches and evaluated under FDA 21 CFR 177.1520 for the base polymer and EU 10/2011 for migration. The downstream production route is thin-wall injection moulding with cold sprue or hot runner, fill speeds of 120–300 mm/s, hold pressure at 60–100 MPa, cooling time of 3–6 s, and total cycle time of 5–9 s, producing dairy tubs, deli containers, takeaway bowls, and snap-over lids. The processing boundary is that hot-fill service above 75°C and retort exposure above 121°C are outside the validated window for this high-flow HDPE in unmodified form.
High-cavitation closure tooling shifts the process bottleneck from melt plastication to gate freeze-off and part ejection force. In 48–96 cavity hot-runner moulds, 9503HF is processed at melt temperature 200–235°C, mold temperature 10–25°C, valve-pin gate diameter 0.6–1.2 mm, and cycle time 5–10 s. The formulation uses 100 phr base resin, colour masterbatch at 1.0–2.5 wt%, erucamide slip additive at 0.03–0.08 wt%, synthetic silica antiblock at 0.05–0.10 wt%, and hindered phenolic antioxidant at 0.03–0.08 phr. Process control is calibrated to the sealing land rather than overall cap diameter; cavity-pressure sensors must maintain peak fill pressure between 70–110 MPa and pressure drop during hold within 15–25 MPa, because inconsistent seal-land flattening creates torque-loss failures in threaded engagement. Compliance for food-contact beverage closures is anchored to FDA 21 CFR 177.1520 and EU 10/2011; mechanical acceptance uses application/removal torque per ASTM D3198, and stress-cracking resistance is screened by ASTM D1693 where detergent or surfactant contact is expected. Terminal products are still-water closures, dairy closures, sports caps, and flip-top personal-care caps. The operational boundary is that high melt-flow resins can exhibit lower environmental stress-cracking resistance than bimodal HDPE grades, so closure designs for aggressive chemistries require ESCR validation on the finished cap rather than reliance on resin type alone.
| Application route | Food-contact/chemical compliance | Mechanical/process test basis | Qualification boundary |
|---|---|---|---|
| Thin-wall food packaging | FDA 21 CFR 177.1520, EU 10/2011 | ISO 1133-1:2022, ASTM D638 | No hot-fill above 75°C |
| Caps and closures | FDA 21 CFR 177.1520, EU 10/2011 | ASTM D3198, ASTM D1693 | High-surfactant ESC validation required |
| Industrial pails | 49 CFR 178.604–178.606, FDA 21 CFR 177.1520 optional | ASTM D638, ASTM D256 | Drop at -18°C requires wall ≥ 2.5 mm |
| Appliance chassis components | IEC 60335-1, UL 94 HB, RoHS 2011/65/EU | ASTM D256, ISO 527-2 | Continuous service ≤ 80°C |
| Returnable logistics crates | ASTM D4169 | ASTM D642, ISO 178 | Long-term creep data limited |
| Cold-chain foodservice trays | FDA 21 CFR 177.1520, EU 10/2011, NSF/ANSI 51 | ASTM D638, ISO 75-2 | Not for hot-fill, retort, or microwave |
Injection-grade high-flow HDPE for open-head pails and industrial containers requires a different tooling strategy than thin-wall packaging because the wall section increases to 2.0–3.5 mm and weld-line consolidation determines drop performance. The pail formulation uses 100 phr 9503HF, carbon black at 1.0–2.5 wt% for UV screening, hindered amine light stabiliser at 0.05–0.3 wt%, zinc stearate at 0.02–0.05 phr, and optionally a process aid at 0.02–0.05 wt% to delay melt fracture in the hot manifold. Moulding is performed on hydraulic clamp machines of 800–1500 metric tons, with barrel temperature 200–230°C, mold temperature 10–25°C, injection pressure 70–100 MPa, hold pressure 40–60 MPa, and total cycle 30–45 s for 5–25 L open-head pails. Sequential valve-gated hot runners with 4–8 drops are specified to prevent annular weld lines at the handle boss; gate sequencing is adjusted so melt fronts meet downstream of the handle attachment. Compliance for dangerous-goods packaging is through UN qualification testing under 49 CFR 178.604–178.606, including drop at -18°C after conditioning at -18°C for 24 h, leakproofness, and stacking-load retention. Food-ingredient pails additionally require FDA 21 CFR 177.1520 and EU 10/2011. Terminal products include 5–25 L pails for coatings, adhesives, detergent, ink, and food-ingredient distribution. The limiting boundary is that impact qualification at -18°C typically requires a minimum sidewall of 2.5 mm and sufficient packing; high melt-flow grades produce lower molecular orientation in thick sections, so down-gauging lids or sidewalls without repeating 49 CFR 178.604 drop tests is not supported.
When service temperature drops below -20°C, notch sensitivity in unfilled HDPE governs the design of small appliance chassis parts. Unmodified 9503HF can exhibit a sub-ambient reduction in notched impact under ASTM D256, so impact-critical applications commonly disperse metallocene ethylene-octene POE at 5–15 wt% into 100 phr 9503HF. This addition shifts the ductile-brittle transition, reduces gate-direction impact anisotropy, and increases cycle time because the modified melt retains heat. Compounding is carried out on a twin-screw extruder with L/D 36:1–44:1, barrel temperature 180–230°C, and screw speed 250–500 rpm; dispersion is considered adequate when low-shear viscosity measurements under ISO 1133-1:2022 remain within a pre-established lot-control band. Other additives include antioxidant at 0.05–0.20 wt%, process aid at 0.02–0.05 wt%, and colour masterbatch at 1.0–2.0 wt%. Injection moulding uses barrel temperatures 180–230°C, mold temperatures 15–40°C, injection speed 50–120 mm/s, and rib-to-nominal-wall thickness ratio below 0.5:1 to avoid sink marks at boss intersections. Compliance is anchored to IEC 60335-1 for safety of household electrical appliances, UL 94 HB for flame rating, RoHS 2011/65/EU, and REACH. Terminal products are floor-care structural housings, small appliance shrouds, and non-heat-exposed covers. The operational boundary is that continuous service temperature should not exceed 80°C; POE modification reduces tensile modulus and heat-deflection temperature measured under ISO 75-2, and published data for 9503HF-specific blends in creep-loaded appliance structures is limited, so internal validation under IEC 60335-1 is required.
In returnable logistics moulding, sink-mark criteria for rib-to-plate junctions and compression set of stacked containers under humid loading are more restrictive than filling pressure. The conversion formula starts with 100 phr 9503HF, HALS at 0.05–0.3 wt%, hindered phenolic antioxidant at 0.03–0.10 wt%, carbon black at 1.0–2.0 wt%, and process aid at 0.02–0.05 wt%. Injection moulding is run on clamp forces of 600–1000 metric tons, with melt temperature 190–225°C, mold temperature 15–30°C, injection pressure 70–100 MPa, and cycle time 25–40 s. Sequential valve gating or low-shear hot runners are preferred to reduce molecular-weight degradation in long melt channels. Distribution qualification uses ASTM D4169-22 simulated-shipment cycles and top-load compression under ASTM D642; outdoor longevity is evaluated by accelerated weathering per ASTM G154. Terminal products include returnable dairy crates, beverage crates, and logistics tote trays. The main limitation is that long-term stacking-creep data for 9503HF under cyclic humidity and load are not fully established in public literature, so converters must generate creep-to-failure data under ASTM D2990 before down-gauging load-bearing sidewalls by more than 10%.
Cold-chain tray tooling places the highest demand on melt-front temperature at the extremity of long fill paths because wall sections are often 1.0–2.5 mm and flow lengths exceed 500 mm in single-drop tools. The formulation is 100 phr 9503HF, nucleating masterbatch at 0.05–0.15 wt% to reduce differential shrinkage, slip agent at 0.05–0.10 wt% to maintain lid release at freezer temperatures, antioxidant at 0.05–0.15 wt%, and colour masterbatch at 1.0–3.0 wt%. Moulding is conducted at melt temperature 200–230°C, mold temperature 12–25°C, injection speed 80–150 mm/s, and hold pressure 60–90 MPa; pressure transducers at the parting line confirm that end-of-fill pressure does not decay below 30 MPa, a practical threshold for sink and warp control in long flow paths. Food-contact service requires FDA 21 CFR 177.1520 and EU 10/2011; food-equipment trays additionally require NSF/ANSI 51 extraction testing. Terminal product types are cold-chain meal trays, food transport trays, and insulated passive container liners. The operative boundary is that unfilled 9503HF at freezer temperatures below -30°C may require impact modification or reduced drop height; it is not suited to hot-fill, retort, or microwave use without separate validation.
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Chevron Phillips Chemical HDPE 9503HF is a high-flow high-density polyethylene injection-molding resin specified for thin-wall rigid packaging, closures, and consumer articles. Producer literature places its density at 0.953 g/cm³ when tested in accordance with ISO 1183-1 or ASTM D1505, and its melt mass-flow rate at 40 g/10 min under 190 °C and 2.16 kg load using ISO 1133-1 or ASTM D1238. That melt-flow value is substantially above general-purpose injection HDPE grades in the 7–20 g/10 min range and far above extrusion blow-molding grades below 1 g/10 min. The property set therefore separates the product from conventional high-density materials in both flow behavior and thermal processing response.
The melt-flow value is not merely a resin property; it acts as a process variable in high-speed multi-cavity tools. For lids and overcaps with wall thickness between 0.5 mm and 0.8 mm, a 40 g/10 min melt-flow resin typically requires lower cavity-filling pressure than a 12 g/10 min injection HDPE because apparent viscosity at gate shear rates declines. The practical result appears as reduced hydraulic injection pressure, shorter fill time, and improved thin-wall penetration. However, the same molecular-weight reduction that raises melt flow also lowers melt strength and environmental stress crack resistance. Consequently, 9503HF is not specified for extrusion blow molding, deep-draw parison formation, or processes requiring substantial melt elasticity.
Multi-cavity hot-runner tools for dairy closures, sauce caps, and thin-wall pails typically operate with unbalanced runner branches and cavity-to-cavity fill variation. In these systems, a lower-melt-index resin often requires elevated melt temperature or injection velocity to avoid short shots. With 9503HF, the available melt flow allows lower filling pressure, but the process window shifts toward shorter hold-pressure time. Cavity pressure sensors are specified for such tools because gate sealing occurs earlier than with lower-melt-flow HDPE. A typical starting melt temperature for high-flow HDPE is 190 °C to 230 °C; mold temperature is commonly held at 10 °C to 30 °C for rapid solidification. In hot-runner manifolds, thermocouple zones should be held below 230 °C; prolonged residence above 250 °C initiates oxidative chain scission and drift in melt-flow data.
Injection pressure requirements depend on projected area and cavity pressure. For example, if a cavity group develops a peak cavity pressure of 30 MPa, each 100 cm² projected area requires 30 kN clamp force, ignoring runner and sprue projection. Thin-wall closure tools with 0.6 mm sidewall may reach peak cavity pressure between 35 MPa and 60 MPa; therefore clamp-force sizing must be confirmed with pressure sensors rather than assumed from resin melt index alone. High-flow HDPE such as 9503HF can flash at low clamp force because lower viscosity permits intrusion into parting lines and vent depth clearances. Vent depth should not exceed 0.02 mm for thin-wall polyolefin molding to avoid flash while permitting air evacuation.
Melt-temperature control in high-speed cycles is more critical for 9503HF than for medium-flow HDPE. The narrow molecular-weight distribution of a high-flow injection grade causes viscosity to respond strongly to temperature and shear history. Shot-to-shot viscosity variation is assessed by monitoring cushion, fill time, and transfer pressure. Processors should record peak injection pressure and screw recovery time as lot-to-lot indicators. A shift in screw recovery time of more than 3–5 % at constant back pressure suggests viscosity drift or check-ring wear. Back pressure is normally maintained between 0.5 MPa and 1.5 MPa; higher back pressure raises melt temperature unnecessarily and can degrade the resin under long residence times.
Pre-drying of 9503HF is typically omitted unless condensation is visible or ambient storage exceeds 60 % relative humidity with cold-to-warm transfer. Where surface moisture is suspected, a hot-air or desiccant hopper dryer at 80 °C for 1–2 h is standard polyolefin practice. Melting should be performed on a general-purpose polyolefin screw with L/D of 20:1 to 25:1 and compression ratio of 2.5:1 to 3.5:1. Screw decompression of 3–5 mm and cushion retention of 3–6 mm are typical starting points. These settings are not grade-specific certifications; they are accepted high-flow HDPE processing ranges that should be verified against the producer’s current processing guide and the installed machine capability.
Food-contact compliance is an article-level determination and cannot be certified solely from pellet properties. Polyethylene homopolymers and copolymers are referenced to FDA 21 CFR 177.1520(c), which includes density and additive restrictions. For European Union end use, Regulation (EU) No 10/2011 and its amendments require overall migration not to exceed 10 mg/dm² under the intended food simulant, contact time, and temperature. The molded article, including colorant, masterbatch, and processing aids, must be tested in final form. Unpigmented high-density polyethylene should not be presumed compliant for all food types; fatty-food simulant D2 under Regulation (EU) No 10/2011 may require specific migration data for additives or degradation products introduced during processing.
The primary difference between 9503HF and lower-melt-index HDPE grades is not stiffness but low-temperature impact and resistance to slow crack growth. Because density is held near 0.953 g/cm³, flexural modulus remains governed predominantly by crystallinity and density. Tensile yield and flexural modulus therefore remain within the class range of injection HDPE; prospective users should consult lot-specific certification for values determined under ISO 527-2 and ISO 178. In contrast, notched Izod impact under ISO 180 or ASTM D256 generally declines as melt index increases. The reduction in average molecular weight also reduces environmental stress crack resistance under ASTM D1693, particularly in the presence of detergents, oils, or polar processing aids.
A lower-melt-index injection grade may show higher melt strength and deeper screw recovery temperature, but it requires greater energy input to fill thin-wall features below 0.8 mm. In multi-cavity closure molds, the practical difference is that 9503HF can often be processed at lower melt temperature and lower injection velocity, reducing thermal degradation and improving color consistency. However, this advantage is offset by increased sensitivity to gate blush and jetting if the gate velocity is too high. Gate geometry for high-flow HDPE should avoid sharp transitions; edge gates with thickness between 0.5 mm and 0.8 mm and land length below 1.0 mm are typical. Valve-gate pin diameter for thin-wall closures is normally 2.0–3.0 mm, with pin actuation timed to avoid overpacking after gate freeze.
Shrinkage behavior also differs from lower-flow HDPE. High-flow injection HDPE tends to exhibit greater orientation-induced shrinkage anisotropy in thin sections. Mold shrinkage measured under ISO 294-4 for this class is often reported between 1.2 % and 2.0 %, but producer lot-specific data is required for tooling. The difference between flow-direction and transverse shrinkage can exceed 0.3 percentage points in highly oriented thin-wall regions. Warpage control therefore depends on filling pattern, gate location, and cooling circuit uniformity more than on resin selection alone.
If 9503HF is substituted into a tool originally qualified with a 12 g/10 min or 20 g/10 min HDPE, the first observed change is usually a reduction in injection pressure and an earlier switch-over point. The pressure reduction can be 10–30 % depending on gate diameter, runner diameter, and wall thickness. Molders should not automatically raise injection velocity; high-flow resin can create jetting or gate blush if linear gate velocity is excessive. A starting transfer position 10–15 % shorter than the existing profile is often used, followed by cavity-pressure verification. Holding pressure should be reduced because the gate freezes earlier and excessive holding pressure increases part weight, dimensional growth, and ejection force.
Cooling time in thin-wall geometry is dominated by wall thickness, not melt index. For a 0.6 mm wall, cooling time may be limited by ejection rigidity rather than thermal diffusion. Mold temperature between 10 °C and 20 °C is frequently used for high-speed closure production to increase part rigidity and reduce cycle time. Lower mold temperature also raises surface frost resistance and improves dimensional stability, although it may increase in-mold stress. If warpage exceeds specification, the first corrective action should be cooling-balance measurement with thermal imaging or temperature probes, not merely increasing mold temperature.
Dimensional control of thin-wall lids molded from 9503HF requires attention to gate seal time. Because the melt index is 40 g/10 min, gate freeze occurs quickly after transfer. If holding pressure is not transferred before gate freeze, sink marks and underpacking appear near the gate. If holding pressure continues after gate freeze, overpacking causes ejection difficulty and increased cycle time. Cavity pressure sensors at the end of flow path detect proper sealing. The recommended method is to set hold pressure duration until the pressure curve reaches a plateau, then add a small margin of 0.2–0.5 s. This practice is carried out on each cavity group because hot-runner imbalance produces different freeze behavior across the tool.
For hot-runner systems, manifold and nozzle temperatures should be profiled rather than set uniformly. Because high-flow HDPE is sensitive to residence time, a heated valve-gate nozzle holding resin at 230 °C may cause degradation if intermittent cycle stoppage exceeds 5 min. During extended pauses, purging with low-melt-index polypropylene or LDPE is standard. Restart should include a resin purge sufficient to displace degraded material; one to machine melt capacity is common in production environments. Melt-index drift after restart is checked under ISO 1133-1 to confirm that the material remains within processing specification.
Regrind usage is an operational boundary. Closed-loop regrind from 9503HF is routinely used in non-food packaging up to 20 % by weight without vacuum drying, provided grind is free of fines and moisture. Above 20 % regrind, variability in melt index and black speck contamination from hot-runner degradation can increase. For food-contact articles, regrind must be the producer’s own clean scrap and must meet the same article-level migration limits. Cleaning procedures must prevent contamination with lower-melt-index HDPE, colored materials, and peroxide-containing purge compounds. A dedicated granulator for natural 9503HF is used in plants where multiple polyethylene grades are processed simultaneously.
The table below summarizes the principal standards and control points relevant to 9503HF when assessed for molded non-food and food-contact articles. It is not a compliance certificate; final compliance is determined on the fabricated part under end-use conditions.
| Parameter | Applicable Method or Regulation | Verification Boundary |
|---|---|---|
| Melt mass-flow rate | ISO 1133-1 / ASTM D1238 | 190 °C, 2.16 kg |
| Density | ISO 1183-1 / ASTM D1505 | Producer lot certification |
| Tensile yield | ISO 527-2 / ASTM D638 | Specimen conditioned 40 h at 23 °C, 50 % RH |
| Flexural modulus | ISO 178 / ASTM D790 | Producer lot certification |
| Notched Izod impact | ISO 180 / ASTM D256 | Low-temperature performance verified by converter |
| US food contact | FDA 21 CFR 177.1520(c) | Finished article, intended food type |
| EU food contact | Regulation (EU) No 10/2011 | Overall migration limit 10 mg/dm² |
| REACH restricted substances | Regulation (EC) No 1907/2006 | SVHC verification on final component |
| RoHS restricted substances | Directive 2011/65/EU | Finished electrical/electronic part |
The high melt-flow value of 9503HF requires explicit thermal boundaries. At melt temperatures above 250 °C, oxidative chain scission accelerates and melt index may shift. Processing trials should include post-purge melt-flow determination, not visual inspection alone. The material should not be combined with amine-based additives or unapproved metal stearates where food-contact migration limits apply, because such additives can alter organoleptic properties and regulatory status. Maintenance of screw and check-ring geometry is also a control point; worn nonreturn valves create shear leakage that increases melt temperature and degrades high-flow HDPE faster than medium-flow resins. Production lots should be sampled for melt index, density, and color consistency before release to high-speed thin-wall lines.
