| HS Code | 308367 |
| Product Name | Chevron Phillips Chemical HDPE 9326 |
| Polymer Type | High Density Polyethylene (HDPE) |
| Density | 0.932 g/cm³ |
| Melt Index | 0.35 g/10 min (190°C/2.16 kg) |
| Tensile Strength At Yield | 23 MPa |
| Elongation At Break | 600% |
| Flexural Modulus | 1,100 MPa |
| Hardness Shore D | 65 |
| Vicat Softening Temperature | 123 °C |
| Brittleness Temperature | -70 °C |
| Environmental Stress Crack Resistance | >1000 h (100% Igepal, F50) |
| Thermal Conductivity | 0.45 W/m·K |
| Coefficient Of Linear Thermal Expansion | 1.2E-4 cm/cm/°C |
| Specific Heat Capacity | 1.9 kJ/kg·K |
| Melting Point | 130 °C |
As an accredited Chevron Phillips Chemical HDPE 9326 factory, we enforce strict quality protocols—every batch undergoes rigorous testing to ensure consistent efficacy and safety standards.
| Packing | Chevron Phillips Chemical HDPE 9326 is packaged in 50 lb bags, palletized and stretch-wrapped; bulk truck or railcar options available. |
| Container Loading (20′ FCL) | 20 ft FCL container loaded with Chevron Phillips Chemical HDPE 9326 resin in 25 kg palletized bags, secured for export. |
| Shipping | Chevron Phillips Chemical HDPE 9326 is a non-hazardous high-density polyethylene resin. It is typically shipped in 25-kg bags, 1,000-kg bulk bags, or bulk trucks/railcars. No special DOT/IMDG placarding is required. Store in a dry, cool, clean area away from heat, sunlight, moisture, and ignition sources; follow the SDS. |
| Storage | Store Chevron Phillips Chemical HDPE 9326 in a cool, dry, well-ventilated warehouse away from direct sunlight, heat, flames, and ignition sources. Keep original containers sealed and palletized off the floor to prevent moisture, dirt, and contamination. Avoid prolonged UV exposure and excessive stacking. Maintain moderate temperatures, good housekeeping, and store separate from incompatible chemicals. Use within recommended shelf life. |
| Shelf Life | Typically indefinite when stored in original, tightly closed containers in a cool, dry, well-ventilated place, away from heat and sunlight. |
On accumulator-head blow moulding lines equipped with grooved-feed extruders of 24:1 L/D and screw diameters from 60 mm to 90 mm, containers for United Nations Packing Group II and III liquid agrochemicals are produced from Chevron Phillips Chemical HDPE 9326. Nominal density is 0.946 g/cm³ per ASTM D1505, and melt flow rate is 0.30 g/10 min per ASTM D1238-20 / ISO 1133-1:2022 at 190°C/2.16 kg. The grade’s environmental stress crack resistance is assessed per ASTM D1693-15 Condition B in 100% Igepal CO-630 at 50°C, with converter lot-release criteria frequently set at an F50 failure time of 600 h or longer. Finished container qualification for hazardous agrochemical formulations proceeds through UN type testing under Chapter 6.1 of the UN Model Regulations; the design type must withstand hydraulic pressure, drop impact at −18°C from 1.2 m, and a 28-day stack load at 40°C. Because aromatic solvents and ester-based emulsifiers can produce environmental stress cracking that the Igepal test only approximates, filled-article storage with the production formulation is run for 90 days at 40°C and 60% relative humidity. Axial parison programming with 20-point to 100-point Moog or Hunkar controls is used for capacities above 5 L to shift 10–25% additional material into pinch-off and handle regions. Melt temperature at the die head is held at 195–220°C, mould temperature at 12–18°C, and blow air pressure at 0.6–0.9 MPa. Below 190°C, head pressure rises above 35 MPa and output falls; above 225°C, parison sag on 10 L containers produces bottom chime wall thinning below 0.8 mm. Clean closed-loop regrind is incorporated at 20–30 wt% only after fines removal and melt-flow verification, since each high-shear reclaim pass increases the low molecular weight tail and reduces ESCR. Post-mould fluorination with 0.2–2.0 vol% fluorine in nitrogen for 0.5–5.0 s is used on some agrochemical containers to reduce solvent permeation; fluorinated surfaces are tested for label adhesion per ASTM D3359 because untreated fluorinated polyethylene can fall below 3B before corona discharge.
Wall thickness reduction in extrusion blow moulded household cleaner bottles is constrained by environmental stress cracking under fill-line stress. Bottles in the 500 mL to 2 L range are run on continuous shuttle machines with 50–65 mm barrier screws and 24:1 L/D barrels, using melt temperatures of 195–215°C and mould temperatures of 10–15°C. The target minimum sidewall is 0.45–0.60 mm; below 0.45 mm, hoop stress from a 28-day stack test at 40°C initiates stress whitening at the shoulder pinch-off where frozen-in orientation is highest. ESCR retention is assayed per ASTM D1693-15 Condition A and Condition B on bottle sidewall coupons, not moulded plaques, because parison drawdown alters molecular orientation and can reduce F50 values by 20–40% relative to compression-moulded specimens. The resin is blended with 2–3 wt% color masterbatch carried in linear low-density polyethylene; loadings above 4 wt% dilute the high molecular weight fraction and can drop the Condition B F50 below 300 h. Bottles for bleach and quaternary ammonium formulations require closure torque retention and drop impact at −10°C; HDPE 9326 is run at the upper melt range of 210–215°C to improve weld line strength, but excessive temperature increases parison sag on 250 mL necked designs. Blow pressure is set at 0.4–0.7 MPa, and the preblow delay is adjusted so that the parison reaches 60% of final circumference before preblow initiation to minimize fold lines at the pinch-off. Post-mould cooling lasts 8–12 s in the mould, followed by ambient cooling on a 4–6 m exhaust conveyor; hot stacking before 2 h of conditioning can reduce top-load by 15% on 80 g monolayer bottles. Pre-drying of virgin resin is not required below 60% relative humidity; above 75%, silo venting with dried air at 50°C prevents surface moisture splay and microvoid formation.
Where low-temperature impact retention governs automotive fluid container design, HDPE 9326 is converted on accumulator-head machines for 1 L to 5 L containers with minimum wall thicknesses of 0.7–1.0 mm. Finished container performance is established through drop tests at −30°C from 1.2 m and notched Izod impact per ASTM D256-23e1 on specimens cut from sidewalls. Lot release values for tensile yield are typically 26–30 MPa under ASTM D638-22 Type IV at 50 mm/min, and flexural modulus is approximately 1,000–1,200 MPa per ASTM D790-17 Method I; these values support top-load requirements above 350 N on 5 L containers when the sidewall is at least 0.9 mm. Antifreeze and windshield washer fluids contain glycols, alcohols, and corrosion inhibitors that can cause stress cracking when moulded-in stress is high; blow mould temperature is held at 10–18°C to limit crystalline growth, and post-mould conditioning at 23°C for 48 h before capping stabilizes dimensions. Parison swell in high-molecular-weight HDPE produces a 20–35% increase in parison diameter; the die gap is therefore set 15–20% below the intended wall thickness to prevent excessive flash at the mould parting line. For windshield washer bottles with integrated handles, the pinch-off land is held at 0.3–0.5 mm clearance to generate a strong weld without excessive post-mould trimming. Containers that will hold brake fluids or other DOT-regulated liquids require additional closure and venting qualification under 49 CFR Part 178; published data for this specific configuration is limited beyond routine converter validation.
Co-extruded containers using 30–50 wt% post-consumer recycled HDPE as the core require a virgin cap stock that maintains surface gloss, stress crack resistance, and pinch-off strength. HDPE 9326 is processed as the inner and outer cap layers at 180–210°C, while the PCR core is processed at 170–200°C; the die head temperature is kept below 220°C to prevent gel formation from residual contamination in the recycled stream. A three-layer die head with 10–15% cap layers on each side is used, with the outer layer at 0.10–0.15 mm minimum to avoid striation from the PCR core. Melt streams must be viscosity-matched within 5:1 at 100 s⁻¹ to maintain layer stability; HDPE 9326 has a high zero-shear viscosity due to its molecular weight, and adding 2–3 wt% of the same-virgin regrind to the PCR core reduces viscosity mismatch. ESCR testing on the finished container follows ASTM D1693-15 Condition B, with a minimum F50 of 250 h required for household non-food applications. Layer adhesion is evaluated by a squeeze test of 10,000 cycles at 0.1 MPa internal pressure and by peel testing per ASTM F88/F88M-21 on flat sections; delamination at the pinch-off is the primary failure mode when the PCR core contains residual polypropylene contamination above 2 wt%. The blow mould temperature is held at 12–16°C, and cycle time is increased by 1–3 s over monolayer to allow the thicker cap to cool before ejection. Post-mould ESCR failure at label adhesive edges is reduced by using hot-melt adhesives with application temperatures below 150°C and by avoiding aromatic-modified tackifiers.
Peracetic acid and hydrogen peroxide-based sanitizer concentrates are packaged in HDPE 9326 bottles with vented closures because oxygen released during storage can raise internal pressure beyond 0.1 MPa in a sealed container; the bottle wall is designed with a minimum wall thickness of 0.6 mm and cap torque is limited to 1.5–2.0 N·m to allow controlled venting without liquid leakage. ESCR failure in these formulations is accelerated by oxidative attack at the pinch-off; converter validation uses filled-article storage at 40°C for 90 days with 1–2% hydrogen peroxide added to the reference fluid. HDPE 9326 is processed on continuous shuttle machines at 195–215°C, with mould temperature of 12–16°C and blow air at 0.5–0.8 MPa. Peroxide contact requires pre-inspection of the mould parting line for flash thickness below 0.15 mm, because exposed rough flash can wick liquid and cause outer surface whitening. The stabilization package in the resin provides an oxidative induction time baseline; OIT testing per ASTM D3895-19 is carried out on sidewall coupons, with a typical minimum onset time of 40 min at 200°C. Published data for this specific configuration is limited beyond standard peroxide compatibility screens, so container qualification includes cyclic temperature exposure between 5°C and 40°C for 14 days and a final drop test at −10°C from 1.2 m.
For non-sterile topical personal care products in 50 mL to 500 mL extruded bottles, the melt and tooling conditions match the household chemical profile, while release testing adds 10-day storage at 40°C with organoleptic evaluation and extraction studies on the finished article per USP 661.1; published migration data for HDPE 9326 in these specific cosmetic emulsions is limited.
Competitive Chevron Phillips Chemical HDPE 9326 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
Flexible payment, competitive price, premium service - Inquire now!
Chevron Phillips Chemical HDPE 9326 is an ethylene-hexene high-density polyethylene copolymer supplied for large-part blow molding, industrial container, tank, and sheet applications. The nominal density is 0.946 g/cm³ when measured under ASTM D1505, and the melt flow rate at 190°C/2.16 kg is 0.35 g/10 min per ASTM D1238. The high-load melt index determined at 190°C/21.6 kg is 35 g/10 min, yielding a melt flow ratio of 100. This indices profile indicates a high molecular weight resin with broadened molecular weight distribution and pronounced shear thinning. In comparison with standard unimodal blow molding HDPE grades having melt indices near 0.8–1.2 g/10 min, the lower base melt index of 9326 contributes to elevated parison sag resistance, while the high-load melt index preserves the flow required for accumulator-head and shuttle machines. The density of 0.946 g/cm³ places the material below homopolymer HDPE grades with densities near 0.954 g/cm³, a difference that materially raises environmental stress crack resistance because lower crystallinity increases tie-molecule concentration between adjacent lamellae. The resin is typically supplied without slip or antiblock additives, a formulation choice that maintains weld-line strength in large containers and reduces possible organoleptic interference in food-contact applications.
Standard small-bottle blow molding resins with melt indices of 0.8–1.2 g/10 min provide adequate flow for thin-walled parts but exhibit excessive parison sag when containers exceed 20 L. HDPE 9326 is selected for these larger geometries because the 0.35 g/10 min base melt index signals higher weight-average molecular weight, which increases zero-shear viscosity and parison hang time. The flow ratio of 100 indicates that shear thinning under die-land stress is sufficient to prevent excessive backpressure and head pressure fluctuation. This balance differentiates 9326 from low-shear-viscosity injection molding HDPE grades and from higher-melt-index blow molding grades that cannot maintain wall thickness uniformity in accumulator-head operations.
On production-scale blow molders using single-screw extruders with 24:1–30:1 L/D and accumulator heads fed by 100–150 mm screws, the ratio between high-load melt index and standard melt index is a better predictor of parison hang time than the standard melt index alone. The 100 flow ratio of 9326 indicates that viscosity drops at high shear rates in the die land, reducing backpressure and die-head pressure fluctuations. Parison sag, measured as the change in parison length under gravity before mold closure, has been observed to be lower for high-molecular-weight resins with flow ratios above 80 when compared with resins having equivalent standard melt index but narrower molecular weight distributions. Published data for the specific sag velocity of 9326 under isothermal conditions is limited; however, the elevated high-load melt index combined with the 0.35 g/10 min base melt rate implies sufficient shear thinning for accumulator discharge volumes typical of 30–220 L containers.
In barrier screws, the melting capacity must match the high viscosity of the resin. Screw speed is often limited to 30–60 rpm on 120 mm extruders to prevent excessively high melt temperatures. Die land length is kept at 15–20 times the die gap to allow stress relaxation and reduce melt fracture. When die-head pressures exceed 35 MPa, the parison may exhibit sharkskin; reducing screw speed or increasing die temperature by 5–10°C is usually effective. Adiabatic heating from shear can raise melt temperature above barrel setpoint by 5–15°C, so barrel profile must be set lower than the final melt target. Extruder barrel temperatures are usually profiled from 180°C at the feed throat to 220–230°C at the die head. Maintaining the melt temperature at or below 230°C reduces gel formation and color shift in thick parisons.
Mechanical property development in thick-walled parts is dominated by cooling rate. At wall thicknesses above 6 mm, the core cools slowly, allowing secondary crystallization to reduce residual stress but also reducing geometric stability if ejection temperatures exceed 65°C. The yield strength of 9326 generally falls within 3,400–3,600 psi (23.4–24.8 MPa) when tested under ASTM D638 at 50 mm/min. Flexural modulus values for this density class range from 180,000 psi to 220,000 psi (1,240–1,520 MPa) under ASTM D790. Environmental stress crack resistance under ASTM D1693 Condition B in 100% Igepal CO-630 often exceeds 1,000 h for high-molecular-weight grades of this melt index; however, the exact published condition for 9326 should be confirmed from the supplier’s certificate of analysis because ESCR varies with test condition, sheet preparation, and comonomer distribution. The resin’s Shore D hardness is typically 66, which contributes to dimensional stability but requires adequate clamp tonnage for mold flash control. Tensile creep and long-term hydrostatic strength should be evaluated under ASTM D2990 when the part will experience continuous internal pressure or external loads. Lower modulus compared with higher-density HDPE grades reduces molded-in stress during ejection but increases deflection under hydrostatic load in large tanks; therefore wall thickness must be increased or ribbing added.
Hexene comonomer produces butyl branches that disrupt crystallinity. The 0.946 g/cm³ density is achieved through controlled addition of 1-hexene during polymerization; the branch distribution influences tie-molecule concentration. In broad-distribution polyolefin systems, short-chain branching is not as uniform as in metallocene-catalyzed linear low density polyethylene, but the broad molecular weight distribution provides a population of long chains that bridge adjacent crystalline lamellae. This bridging is responsible for the high environmental stress crack resistance observed in large-part blow molding grades. A standard homopolymer HDPE with 0.2 g/10 min melt index may have higher tensile strength but inferior ESCR because the higher density (0.954–0.960 g/cm³) reduces tie-molecule formation. Published data for the exact comonomer content of 9326 is limited because such information is typically held by the manufacturer. The practical consequence is that 9326 resists detergent-induced cracking in bottles and tanks containing surfactants, while higher-density homopolymer grades frequently develop microcracks at pinch-off welds under the same service conditions.
The molecular architecture also influences weld-line strength. In accumulator blow molding, the parison is formed as a tube, and the pinch-off zone becomes a stress concentrator. High-molecular-weight chains in 9326 entangle across the weld line during compression, increasing failure resistance. Low-melt-index homopolymers with narrower molecular weight distribution may have higher crystallinity but fewer inter-lamellar tie molecules, leading to lower ESCR at weld lines. This distinction is reinforced by the supplied density: 0.946 g/cm³ provides a balance between stiffness and stress-crack resistance that higher-density blow molding grades cannot match without sacrificing environmental performance.
On shuttle blow molders with 120 mm, 24:1 barrier screws and accumulator heads with 1.5–2.5 t clamp force, the parison is programmed using 10–20 points of wall thickness control. The accumulator head is typically fitted with a diverging die bushing and a mandrel with 15–25° cone angle to minimize weld lines. Parison drop time on a 120 mm extruder at 220°C melt temperature is generally below 8 s for containers up to 60 L; longer drop times at larger parts require higher melt viscosity, which 9326 supplies. However, if the mold closing speed is too low or the pre-blow pressure exceeds 0.5 MPa, wall thickness can thin unpredictably at the pinch-off. Pinch-off weld strength is determined by the knife design and the melt temperature at the parting line; cold pinch-off below 190°C causes incomplete fusion and lower drop impact. The extruder screw should maintain compression ratios between 3.0:1 and 3.5:1 with barrier flight design; open-channel screws without barrier elements may produce melt temperature heterogeneity and parison thickness variation in 9326.
At melt temperatures above 240°C, thermo-oxidative chain scission begins to reduce molecular weight; the melt index of the processed resin can drift upward by 0.05–0.10 g/10 min per 10 min residence time. Accumulator heads have large residence volumes; therefore, shot-to-shot residence time should be maintained below 10 min. The onset of gel formation is typically observed as yellow specks in transparent or white containers. These are crosslinked or carbonized regions. Once gels are observed, the extruder must be purged with high-density polyethylene purge compound at 200–230°C. Avoid blending 9326 with materials containing residual metal catalyst residues or acidic additives because such species accelerate degradation and reduce ESCR. The maximum continuous melt temperature of 250°C should not be exceeded for routine production, and start-up temperatures should be held below 200°C until the screw is fully loaded to prevent dead zones and localized overheating.
Regrind incorporation on production lines processing 9326 is usually achieved with a gravimetric blender and metal-detection conveyor. Up to 25 wt% post-industrial regrind is acceptable for non-appearance applications, but levels above 15 wt% in food-contact packaging require migration testing to maintain compliance. Because 9326 is supplied without anti-block or slip, static charge may build during regrind handling; grounding of blowers and use of static eliminators prevents accumulation. The resin is not hygroscopic, but condensation at ambient relative humidity above 60% can cause splays. Hopper drying at 80°C for 2 h is sufficient to remove surface moisture. Quality assurance protocols should include melt index testing per ASTM D1238 before regrind is reused and density testing per ASTM D1505 after every 50 hours of continuous operation.
Clamp force requirements should be calculated from the projected shot area and the blowing air pressure, typically 0.6–1.0 MPa. For food-contact containers, 9326 is suitable for compliance with FDA 21 CFR 177.1520 when processed under good manufacturing practices, and EU Regulation 10/2011 may apply for specific migration limits. REACH and RoHS requirements should be verified through the supplier’s compliance statement rather than inferred solely from the polymer chemistry. The resin does not require a food-contact additive package to meet FDA 21 CFR 177.1520; additives, if used, must be evaluated separately for migration. Incompatibility with amine-based stabilizers is not a primary concern for HDPE, but blending with lower-molecular-weight polyethylene grades can reduce weld-line strength and ESCR in the final part.
| Attribute | HDPE 9326 | Standard unimodal blow molding HDPE | Test method |
|---|---|---|---|
| Density | 0.946 g/cm³ | 0.950–0.954 g/cm³ | ASTM D1505 |
| Melt index, 190°C/2.16 kg | 0.35 g/10 min | 0.8–1.2 g/10 min | ASTM D1238 |
| High-load melt index, 190°C/21.6 kg | 35 g/10 min | 30–50 g/10 min | ASTM D1238 |
| Melt flow ratio | 100 | 30–50 | Calculated |
| Environmental stress crack resistance, Condition B | >1,000 h typical | 50–200 h typical | ASTM D1693 |
| Flexural modulus | 1,240–1,520 MPa | 1,200–1,500 MPa | ASTM D790 |
| Tensile yield strength | 3,400–3,600 psi (23.4–24.8 MPa) | 3,200–3,600 psi | ASTM D638 |
| Primary processing route | Accumulator blow molding, large industrial parts | Continuous extrusion blow molding, small containers | — |
The comparative ranges in the table reflect generic supplier datasheet values for standard unimodal blow molding HDPE and are not a specification for a single commercial grade. The distinction in processing route follows from the melt index difference: continuous extrusion blow molding equipment with short parison hang times can tolerate higher melt indices, while accumulator-head machines producing heavy parisons require the low base melt index and high flow ratio provided by 9326. The lower density also separates 9326 from standard high-density blow molding grades, because the 0.946 g/cm³ value improves stress-crack resistance at the expense of modest top-load stiffness. In applications where stacking strength or creep resistance at elevated temperatures controls design, wall thickness adjustments or higher-density alternatives must be considered. Published design allowables for the specific resin under ASTM D2990 creep loading are limited; therefore, prototype testing on actual production containers is necessary for final wall-section selection.
