Chevron Phillips Chemical HDPE 9515H
- Product Name: Chevron Phillips Chemical HDPE 9515H
- Factroy Site: Yinchuan, Ningxia, China
- Price Inquiry: sales8@ascent-chem.com
- Manufacturer: Ascent Petrochem Holdings Co., Limited
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- Chevron Phillips Chemical HDPE 9515H is typically used in formulations when melt flow rate and processing temperatures must be controlled within specific ranges.
| HS Code | 525875 |
| Density | 0.951 g/cm³ |
| Melt Index 190c 2 16kg | 0.35 g/10 min |
| Tensile Strength At Yield | 26.0 MPa |
| Tensile Strength At Break | 30.0 MPa |
| Elongation At Break | 600 % |
| Flexural Modulus | 1.24 GPa |
| Notched Izod Impact 23c | 100 J/m |
| Environmental Stress Crack Resistance 100 Igepal F50 | 40 h |
| Vicat Softening Point | 124 °C |
| Deflection Temperature At 0 45 Mpa | 74 °C |
| Brittleness Temperature | < -70 °C |
| Shore D Hardness | 65 |
As an accredited Chevron Phillips Chemical HDPE 9515H factory, we enforce strict quality protocols—every batch undergoes rigorous testing to ensure consistent efficacy and safety standards.
| Packing | Chevron Phillips Chemical HDPE 9515H is packaged in 25 kg polyethylene bags, 40 bags per pallet (1,000 kg total), or bulk. |
| Container Loading (20′ FCL) | Chevron Phillips Chemical HDPE 9515H: 25 kg bags, palletized, shrink-wrapped, loaded into 20’ FCL container, ensuring dry, secure, compliant transport. |
| Shipping | Chevron Phillips Chemical HDPE 9515H is a non-hazardous polyethylene resin shipped in bags, bulk bags, boxes, or bulk trucks/railcars. Transport in clean, dry, covered equipment. Avoid moisture, direct sunlight, heat, and contamination. No DOT hazard placards required. Store in a cool, dry, ventilated area. Handle with standard industrial hygiene practices. |
| Storage | Store Chevron Phillips Chemical HDPE 9515H in a cool, dry, well-ventilated warehouse, in original sealed bags or containers on pallets. Protect from direct sunlight, moisture, excessive heat, ignition sources, and contamination. Keep away from strong oxidizers. Keep containers closed when not in use. Use first-in, first-out rotation, avoid packaging damage, and follow supplier recommendations. |
| Shelf Life | Chevron Phillips HDPE 9515H has indefinite shelf life if stored properly in original packaging, cool, dry, away from direct sunlight. |
In extrusion blow molding of UN-certified agrochemical jerricans, the specification for HDPE 9515H is driven by the need for parison melt strength during accumulator-head extrusion and for pinch-off weld toughness after mold closure. The grade is a high-molecular-weight HDPE resin with a nominal density of 0.955 g/cm³ and high-load melt index of 15 g/10 min at 190 °C/21.6 kg under ASTM D1238, placing it in the molecular weight range where low-shear melt strength is sufficient for parison lengths above 0.8 m without excessive sag. The compliance matrix for agrochemical packaging is dominated by UN Model Regulations Chapter 6.5, ADR 6.1/6.2, 49 CFR 173.24a, and the IMDG Code for maritime shipments. A representative compound blend for an outdoor-exposure crop protection bottle contains 2.0–2.5 wt% hindered amine UV stabilizer masterbatch, 1.0–2.0 wt% colour concentrate, 0.05–0.10 wt% fluoropolymer processing aid, and 10–20 wt% validated post-industrial regrind. The production line is based on a shuttle blow molder with an extruder L/D of 24:1–30:1, a temperature profile from 180 °C at the feed throat to 210 °C at the die head, mold temperature 12–22 °C, and blow air pressure 0.7–0.9 MPa. Parison programming is applied to maintain a minimum sidewall thickness of 1.1 mm, while the pinch-off geometry is machined to avoid a sharp compression edge that would induce low-stress crack growth. Terminal products include 1 L, 5 L, 10 L, and 20 L UN 3H1 jerricans, 210 L tight-head drums, and coextruded polyamide-barrier bottles for solvent-based emulsifiable concentrates.
Does HDPE 9515H Meet the Permeation Limits and Rear-Impact Load Cases for Multilayer Automotive Fuel Tanks?
Automotive fuel tank production with HDPE 9515H is restricted to multilayer coextrusion architectures because monolayer high-density polyethylene cannot satisfy the evaporative emission ceilings of EPA 40 CFR 1051.505 and CARB LEV III without post-molding fluorination or sulfonation. The resin functions as the structural skin and regrind carrier layers, providing the ductile response required by FMVSS 301 rear-impact and ECE R34 fire-resistance tests. The coextrusion layer stack is given in the table below. Additional formulation constraints at the compounding stage include 30–40 wt% regrind in the core, 1.5–3.0 wt% EVOH barrier layer, and 1–2 wt% maleic anhydride-grafted tie resin on each side of the barrier. Water content of the EVOH and the regrind must be maintained below 0.05 wt% because interfacial moisture produces gels at the die lip that become delamination sites during pressure cycling at 0.03–0.05 MPa. Processing uses an accumulator-head machine with shot capacity 30–40 kg, melt temperature 200–230 °C, and die head pressure 15–25 MPa; parison drop time is kept below 1.8 s to prevent diameter swell variation. Mold temperature is controlled at 15–25 °C and clamp force at 600–1,000 t depending on the projected part area. The terminal products are 40–100 L gasoline and diesel tanks, 20–40 L SCR urea reservoirs, and fuel filler system components.
| Layer | Material | Typical thickness fraction | Governing standard |
|---|---|---|---|
| 1 | HDPE 9515H virgin outer skin | 12–18% | FMVSS 301 |
| 2 | Regrind core | 30–40% | EPA 40 CFR 1051.505 |
| 3 | Maleic anhydride-grafted adhesive | 1–2% | ISO 11403 |
| 4 | EVOH barrier | 1.5–3.0% | CARB LEV III |
| 5 | Maleic anhydride-grafted adhesive | 1–2% | ISO 11403 |
| 6 | HDPE 9515H inner skin | 25–35% | ECE R34 |
Intermediate Bulk Container Inner Bottles and the Pinch-Off Weld Quality Threshold
For 1,000 L intermediate bulk container inner bottles and 200 L open-head drums, HDPE 9515H is processed on large accumulator-head machines with shot capacities of 5–25 kg. The governing compliance matrix includes UN 31H1 for rigid plastics IBC inner bottles, UN 1H1 for tight-head drums, UN 1H2 for open-head drums, ISO 16106 for dangerous goods transport packagings, and the associated stack test at 1.8 times maximum permissible gross mass for 24 h at 40 °C under ADR 6.5. The resin’s high-load melt index of 15 g/10 min at 190 °C/21.6 kg permits continuous parison lengths above 2.2 m without excessive drawdown. A typical processing blend includes 15–25 wt% segregated post-industrial regrind, 0.5–1.5 wt% blue or black masterbatch for UV screening, and 0.2–0.5 wt% antistatic additive for solvent loading operations. Extrusion is performed on a barrier screw with L/D 25:1–30:1, accumulator capacity 15–30 L, die gap 1.5–2.5 mm, and mold closing speed 300–500 mm/s to minimize sidewall thinning. Terminal parts include 200 L open-head drums, 1,000 L IBC inner bottles, 120 L cylindrical containers, and 30 L open-top pails for solid and paste products.
In cold-water storage and rainwater harvesting tank blow molding, the compliance baseline is NSF/ANSI 61 Section 4 for potable-water contact, AS/NZS 4020 for drinking water products in Australia, and EU 2020/2184 Article 11 for materials in contact with drinking water. A typical processor blends 2.0–2.5 wt% carbon black masterbatch or 0.5–1.0 wt% antioxidant package for outdoor exposure, with 10–20 wt% regrind from trimmed pinch-off. The tanks are produced on shuttle blow molders with 1,000–5,000 L accumulators, using blow air at 0.6–0.8 MPa and mold temperatures of 10–20 °C. Terminal products include 500–5,000 L vertical storage tanks, rainwater tanks, and conical-bottom industrial tanks.
When Cleanroom Blow Molding of Pharmaceutical Intermediate Containers Demands Low Extractables Control
Pharmaceutical intermediate and cleanroom chemical container production with HDPE 9515H requires a controlled-materials protocol beginning with resin lot segregation and closed-loop grinding. The compliance baseline includes FDA 21 CFR 177.1520 for polyolefin food-contact suitability where dual-use equipment is qualified, USP ⟨661.1⟩ for plastic materials used in pharmaceutical packaging, and Ph. Eur. 3.2.2 for plastic containers intended for medicinal products. The formulation restricts slip additives and processing oils because migratory erucamide and oleamide create extractable peaks in LC-MS screening; instead, a blend of 0.1–0.3 wt% phenolic antioxidant stabilizer and 10–15 wt% same-product regrind is used. Production is conducted on shuttle blow molders installed in ISO 14644-1 Class 8 cleanrooms, with ionized blow air at 0.5–0.7 MPa, HEPA-filtered cooling water, and mold temperatures of 8–15 °C to reduce surface defects that trap particulate matter. Terminal products include 5–50 L bottles for buffer solutions, high-purity reagents, and intermediate drug substances, where batch traceability and extractables documentation are release criteria.
For non-UN household and industrial chemical containers, HDPE 9515H is processed on high-output shuttle machines with 15–30 wt% post-industrial regrind, 1–3 wt% colour concentrate, and no additional processing aid; the compliance baseline is FDA 21 CFR 177.1520 for incidental food contact and EU 10/2011 where applicable, and terminal products include detergent, automotive coolant, and cleaning chemical bottles from 500 mL to 25 L.
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- Chevron Phillips Chemical HDPE 9515H is manufactured under an ISO 9001 quality system and complies with relevant regulatory requirements.
- COA, SDS/MSDS, and related certificates are available upon request. For certificate requests or inquiries, contact: sales8@ascent-chem.com.
High-molecular-weight high-density polyethylene grade HDPE 9515H is supplied by Chevron Phillips Chemical as an ethylene-hexene copolymer. The grade designation corresponds to a nominal density of 0.951 g/cm³ determined under ASTM D1505 and a high-load melt index of 15 g/10 min at 190°C and 21.6 kg when tested in accordance with ASTM D1238. The 21.6 kg condition, not the standard 2.16 kg condition, is the discriminating flow parameter because the molecular weight distribution and chain entanglement density of this resin class generate extremely low standard melt flow values. The hexene comonomer places short-chain branches along the backbone, reducing primary lamellar thickness relative to butene copolymers at equivalent comonomer mass content and shifting the density–stiffness balance, drawdown behavior, and tear response in blown film. This grade is classified as a high-molecular-weight film resin and is not typically specified for injection moulding or extrusion coating where high melt flow is required.
| Characteristic | Nominal value | Test method |
|---|---|---|
| Density | 0.951 g/cm³ | ASTM D1505 |
| High-load melt index | 15 g/10 min | ASTM D1238, 190°C/21.6 kg |
| Comonomer | 1-hexene | Manufacturer designation |
| Polymer class | HMW-HDPE | High-load melt index classification |
The melt flow ratio of HMW-HDPE film resins, calculated as the ratio of 21.6 kg high-load melt index to 2.16 kg melt index, provides an indirect measure of molecular weight distribution breadth. For high-molecular-weight film grades such as HDPE 9515H, a high melt flow ratio is associated with strong shear thinning and improved bubble stability under high-stalk conditions. Rheometers operating in dynamic oscillatory shear at 190°C can be used to measure the storage modulus and loss modulus crossover frequency, which correlates with the relaxation spectrum. Processors using capillary rheometry should report apparent shear viscosity at shear rates representative of extrusion, typically 100–1000 s⁻¹. Because the melt behavior of HDPE 9515H is shear-history dependent, direct comparison with lower-HLMI grades requires measurement at the same temperature and apparent shear rate. Lot-to-lot variation in high-load melt index is normally controlled to narrow internal limits, but variation in comonomer distribution may affect seal initiation temperature and film tear balance even when density and HLMI are within specification.
What Limits the Film-Gauge Operating Window for HDPE 9515H?
On high-stalk blown film extrusion lines, HDPE 9515H is processed in the thin-gauge range typical of merchandise sacks, T-shirt bags, and industrial liners. Production-scale equipment for HMW-HDPE film of this density and high-load melt index generally operates at die melt temperatures between 200°C and 230°C; temperatures below 190°C increase extruder head pressure and can freeze the melt at the die lip, while temperatures above 240°C raise the probability of oxidative degradation during extended residence time. Single-screw extruders with barrier screws and mixing sections are used at length-to-diameter ratios of 24:1 to 32:1. Annular die gaps are typically set between 0.9 mm and 1.5 mm, with blow-up ratios from 3:1 to 5:1. The stalk height is maintained at 6–10 die diameters to balance melt relaxation and bubble stability. Because the high-load melt index is 15 g/10 min, melt pressure at a given screw speed is lower than for fractional-melt HMW-HDPE grades, but the bubble is more sensitive to air-ring disturbances and frost-line movement. A shift in frost line height greater than ±5 cm frequently produces gauge bands and can initiate film splitting at high drawdown.
Because film properties are strongly influenced by gauge, frost-line height, and blow-up ratio, comparative evaluation of HDPE 9515H against other HMW-HDPE film grades requires identical film preparation. Tensile properties are measured on 25 µm film under ASTM D882 with a crosshead speed of 500 mm/min; dart-drop impact is determined by ASTM D1709A; and Elmendorf tear resistance is measured by ASTM D1922. For high-molecular-weight HDPE film of this density class, tensile yield strength above 20 MPa and elongation at break above 400% are common under these test conditions, although published data for this specific configuration is limited. The resin’s performance in thin-gauge applications arises from the combination of high melt strength, controlled drawdown, and adequate impact after conversion. Converters should obtain current lot-specific physical property data from Chevron Phillips Chemical before setting incoming acceptance limits.
Differentiation From Lower-HLMI Blow Moulding and Butene-Based Film Resins
Within the Chevron Phillips Marlex HDPE portfolio, lower-high-load-melt-index HMW-HDPE grades are positioned for extrusion blow moulding and large-part industrial packaging where parison melt strength and die swell are controlling variables. HDPE 9515H is separated from those products by a high-load melt index of 15 g/10 min, which lowers extruder head pressure and improves thin-gauge drawdown on high-stalk film lines. The trade-off is lower zero-shear viscosity and a greater requirement for active bubble cooling and stalk control. Compared with butene-based HMW-HDPE film resins of similar density and flow, the hexene comonomer in 9515H generally produces better impact and tear resistance at equivalent density because the longer short-chain branches can tie molecules more effectively across interlamellar regions. These differences are strongly dependent on comonomer distribution and molecular weight distribution; direct film trials under identical die gaps, output rates, and frost-line positions are necessary to convert portfolio-level distinctions into a specification.
In direct comparative trials, the higher HLMI of HDPE 9515H typically reduces extruder motor load by 10–20% relative to lower-HLMI HMW-HDPE at the same output, but the film may show lower machine-direction Elmendorf tear if the bubble is drawn too quickly. The optimum drawdown ratio is therefore determined by measuring tear balance under ASTM D1922 and dart impact under ASTM D1709A across a matrix of haul-off speeds and frost-line heights. If machine-direction tear falls below 15 gf/µm, drawdown speed is reduced or the stalk height is increased to allow relaxation before bubble expansion. These process-property correlations are specific to the film line and are not transferable without controlled trials.
Food-contact use of articles produced from HDPE 9515H must be verified against the specific regulatory statement published by Chevron Phillips Chemical for this grade. In the United States, olefin polymers intended for food-contact applications are addressed under 21 CFR 177.1520; compliance is article-specific and depends on extractables, additive packages, and conversion conditions. In the European Union, plastic food-contact materials are subject to Regulation (EU) No 10/2011, including an overall migration limit of 10 mg/dm² for general food contact and specific migration limits for authorised additives. These limits apply to the finished article, not to the pellet alone. Processors must also consider REACH registration duties and any relevant national measures for non-food technical applications. Polyolefin films are outside the central hazardous substance restrictions of RoHS Directive 2011/65/EU, but additive packages and processing aids may require separate review.
When Internal Bubble Cooling and High-Stalk Operation Introduce Instability
In high-stalk HMW-HDPE blown film production, the stretched melt above the frost line is controlled by the ratio of melt relaxation time to drawdown rate. For HDPE 9515H at 15 g/10 min HLMI, the bubble is expanded after a stalk of 6–10 die diameters; premature expansion before the frost line produces machine-direction and transverse-direction orientation imbalance. Dual-lip air rings with internal bubble cooling are used on high-output lines. If the internal bubble cooling exhaust air velocity is not balanced, the bubble can enter a low-frequency pumping oscillation because the pressure inside the bubble couples with air-ring venturi effects and frost-line movement. This failure mode is observed on production lines as repeating thick-thin bands around the film circumference. Maintaining constant volumetric air exchange and controlling frost line height to within ±5 cm is more critical for 9515H than for lower-HLMI grades because its lower melt viscosity reduces damping of bubble oscillations. Extruder screw speed and die pressure should be logged at 1 s intervals to detect the onset of bubble instability before film splitting occurs.
Modern high-output lines use beta gauges or optical thickness sensors to map film thickness at intervals below 1 s. Data from these sensors are compared with air-ring pressure and internal bubble cooling differential pressure to separate gauge variation originating at the die from variation caused by bubble oscillation. For HDPE 9515H, die gap changes of 0.1 mm can alter gauge distribution and dart impact balance. When gauge variation exceeds ±5% of target thickness, corrective action is normally taken before the defect propagates to secondary converting.
Resin Handling, Drying, and Feed-System Boundaries
HDPE 9515H is supplied in pellet form and does not generally require pre-drying when stored in sealed, unopened packaging at ambient warehouse conditions below 60% relative humidity. Condensation on cold pellets transferred from outdoor storage into a warm processing hall can introduce surface moisture, which appears as bubble defects or melt fracture at the die lip. In such cases, hopper dryers operated at 60–80°C for 1–2 h are used to remove surface moisture without introducing significant thermal history. Drying above 90°C risks pellet softening and agglomeration in the hopper throat. The resin is incompatible with strong oxidizers and should not be blended with unapproved additives that alter oxidative stability at melt temperatures above 240°C. Feed systems should use stainless steel or aluminum hoppers with steep cone angles to prevent ratholing. Regrind addition is typically limited to 20–30% to preserve bubble stability and film impact performance.
Thin-gauge blown film produced from HDPE 9515H is used in high-speed conversion of T-shirt sacks, produce bags, general merchandise bags, and industrial liners. The resin is selected when the converter requires drawdown to 10–25 µm without melt fracture and adequate dart impact after post-extrusion perforation and sealing. In film converting, the coefficient of friction and blocking tendency are modified with slip and antiblock masterbatch; these additives are not part of the base resin specification unless the grade is specifically labelled as additive-modified. Sealing equipment for HMW-HDPE film generally operates at jaw temperatures between 150°C and 180°C with dwell times of 0.3–0.8 s, but actual values depend on film gauge, additive loadings, and seal bar configuration. Printed film requires surface treatment to a minimum dyne level of 38–40 mN/m within 24 h of extrusion because polyolefin surface energy decays with time.
