| HS Code | 801236 |
| Productname | Chevron Phillips Chemical HDPE 8300 |
| Materialtype | High Density Polyethylene (HDPE) |
| Density G Cm3 | 0.953 |
| Meltindex G 10min 190c 2 16kg | 0.35 |
| Tensilestrengthatyield Mpa | 29 |
| Tensilestrengthatbreak Mpa | 33 |
| Elongationatbreak Percent | 600 |
| Flexuralmodulus Mpa | 1400 |
| Environmentalstresscrackresistance F50 Hours | >1000 |
| Vicatsofteningtemperature C | 127 |
| Brittlenesstemperature C | -70 |
| Hardnessshored | 66 |
| Thermalconductivity W Mk | 0.45 |
| Specificheat Kj Kgk | 1.9 |
As an accredited Chevron Phillips Chemical HDPE 8300 factory, we enforce strict quality protocols—every batch undergoes rigorous testing to ensure consistent efficacy and safety standards.
| Packing | Chevron Phillips Chemical HDPE 8300 comes in 25 kg (55.1 lb) multiwall bags, palletized, or 1,000 kg bulk sacks. |
| Container Loading (20′ FCL) | 20′ FCL container loading for Chevron Phillips Chemical HDPE 8300: 25 kg bags, palletized, shrink-wrapped, securely stowed for ocean transport. |
| Shipping | Chevron Phillips Chemical HDPE 8300 is shipped as non-hazardous polyethylene resin pellets in 25-kg bags, 1,000-kg bulk bags, or bulk containers/railcars. Handle with standard PPE; store indoors in original packaging. Transport by truck, rail, or container, protecting from moisture, contamination, excessive heat, and UV. |
| Storage | Store Chevron Phillips Chemical HDPE 8300 in a cool, dry, well-ventilated area away from direct sunlight, heat, sparks, and open flames. Keep in original, closed containers or bags on pallets; protect from moisture, oils, and contaminants. Avoid prolonged UV exposure and excessive stacking pressure. Maintain good housekeeping to prevent dust and slipping hazards. Ensure containers are labeled and inspect regularly. |
| Shelf Life | Chevron Phillips Chemical HDPE 8300 has no established shelf life; stable indefinitely if stored sealed, dry, cool, away from sunlight. |
In thin-wall food-contact injection moulding, Marlex HDPE 8300 is processed on high-speed stack moulds with four to sixteen cavities because the melt flow index of 30 g/10 min at 190°C/2.16 kg under ASTM D1238 supports extended fill in flow-length/thickness terms above 120:1. The grade’s density of 0.954–0.960 g/cm³ under ASTM D1505 provides stacking stiffness after demoulding. Compliance for this sector attaches to FDA 21 CFR 177.1520, Regulation (EU) No 10/2011 with overall migration not exceeding 10 mg/dm², and GB 4806.7-2016 for China-bound articles. Addition ratios at the press are restricted to PE-based masterbatches: colour concentrate 1.0–2.5 wt%, slip/antiblock masterbatch 0.3–0.8 wt%, and closed-loop regrind not exceeding 20 wt% of total shot weight. Processing on stack moulds typically uses a barrel rear-to-front profile of 180–220°C, nozzle temperature of 200–230°C, and mould coolant at 10–30°C; injection velocity is set to 150–350 mm/s with hold pressure in the range 40–70 MPa, followed by cooling time of 4–8 s. Finished articles include dairy tubs, deli containers, portion cups from 250 mL to 1,000 mL, and snap-fit lids.
On production lines, plate-out is observed when slip masterbatch loadings exceed 0.8 wt% in hot-runner valve-gate systems; the upper boundary is therefore not a rheology constraint but a mould-fouling boundary. At ambient relative humidity above 65%, hopper drying at 70–80°C for 2–3 h is applied to prevent splay at the gate side. Short-shot drift across cavities is commonly traced to non-uniform regrind particle size rather than barrel temperature settings.
In closure moulding, Marlex HDPE 8300 is selected for high-cavitation tools because a narrow molecular weight distribution lowers differential shrinkage between gate and weld-line regions. Compliance is required with FDA 21 CFR 177.1520 for food and beverage contact, Regulation (EU) No 10/2011 for EU-sold packaging, and USP <661.1> when the closure is used for solid oral dosage containers. Addition ratios are: PE-based colour concentrate 0.5–2.0 wt%, erucamide slip masterbatch 0.05–0.3 wt%, antistat masterbatch 0.1–0.3 wt%, and regrind limited to 10 wt% to avoid torque variability. Processing is performed on 32–96-cavity hot-runner moulds with valve-gated drops; melt temperature at the nozzle is 200–230°C, mould temperature is 15–35°C, and target cycle time is 6–8 s. Packing pressure is maintained at 50–80 MPa until gate freeze; premature gate freeze produces top-load failure at the thread root, while excessive packing elevates demoulding torque. Finished product types include tamper-evident closures for non-carbonated beverages, dry pharmaceutical closures, and overcaps for dairy or cosmetic tubes.
At plant scale, the practical upper limit for closure regrind is not viscosity degradation but dust and fines accumulation in gravimetric feed-throat zones. Closures produced with antistat masterbatch above 0.3 wt% can exhibit reduced seal-surface gloss and higher water-bath rejects in automated vision inspection.
Industrial open-top pails and containers are moulded from Marlex HDPE 8300 when the converter must balance cycle time against UN certification drop-stack performance. Dangerous goods pails require compliance with UN 1H2 design-type testing under the United Nations Model Regulations; food-contact pails additionally require FDA 21 CFR 177.1520 or Regulation (EU) No 10/2011, depending on the destination market. Addition ratios are: heavy-metal-free pigment masterbatch 1.5–3.5 wt%, UV stabiliser masterbatch 0.2–0.8 wt% for outdoor storage, and regrind ≤25 wt% derived from the same pail production line. Processing occurs on accumulator-assisted injection moulding machines with clamp force from 350 t to 500 t; melt temperature is 200–240°C, mould temperature is 15–40°C, and injection pressure of 80–120 MPa is common but should be confirmed on the specific tool. Finished product types include 1 L to 25 L open-top pails, tamper-evident lids, and industrial buckets for lubricants, paints, and cleaning chemicals.
In drop-test failure analysis, fracture tends to initiate at the gate area when hold pressure is released before the part mass reaches 98% of nominal; holding time is therefore set by part weight stabilisation rather than visual fill. Chemical compatibility for oxidising acids and aromatic hydrocarbons is not implicit; permeation testing under ASTM D2684 or EN 14479 is required before filling with such contents.
In housewares and small appliance housings, HDPE 8300 is processed with melt temperature of 200–230°C and mould temperature of 15–35°C; mould shrinkage ranges from 1.5% to 2.5% depending on wall thickness, so tool cut dimensions are adjusted using iterative shrinkage measurements under ASTM D955-08. Compliance under REACH EC 1907/2006 is met by verifying SVHC content below 0.1 wt%; electrical/electronic appliance parts fall under RoHS 2011/65/EU Annex II restrictions for lead, mercury, cadmium, hexavalent chromium, PBB, and PBDE at ≤0.1 wt%, except cadmium at ≤0.01 wt%. Addition ratios are: colour masterbatch 1.0–2.5 wt%, antioxidant masterbatch 0.1–0.4 wt%, and regrind 10–20 wt%. Processing uses single- or multi-cavity cold-runner tools and screw L/D of 20:1 to 24:1; injection velocity is set to avoid jetting at the gate, especially in thick-wall storage totes. Finished products include storage totes, laundry housing panels, small appliance bases, and rigid houseware components.
A production-floor limitation appears in high-gloss black articles where the combination of 2.5 wt% black masterbatch and regrind above 20 wt% can cause visible specks and inconsistent surface gloss; converters therefore hold regrind below 15 wt% for high-gloss finishes. Weld-line strength in large tote boxes is monitored by drop impact at 0.8 m on the base corner at -20°C, a condition that exposes incomplete packing more reliably than room-temperature testing.
| Article class | Standard or regulation | Test method or parameter | Typical acceptance threshold |
|---|---|---|---|
| Food-contact packaging | FDA 21 CFR 177.1520 | Olefin polymer extractives | Complies with paragraph (c) limits |
| EU food-contact plastics | Regulation (EU) No 10/2011 | Overall migration | ≤10 mg/dm² |
| Dangerous goods pails | UN 1H2 | Drop test, Packing Group II | No leakage or rupture at 1.2 m |
| Electrical/electronic appliance parts | RoHS 2011/65/EU Annex II | Restricted substances | Pb, Hg, CrVI, PBB, PBDE ≤0.1 wt%; Cd ≤0.01 wt% |
| Diagnostic components | ISO 10993-5 | Cytotoxicity | Non-cytotoxic within 72 h |
Non-implant diagnostic packaging components, such as specimen cups, analyser reservoirs, and transport clip bases, are manufactured from Marlex HDPE 8300 only after resin and colour masterbatch lot certification against ISO 10993-5 cytotoxicity and USP <661.1> plastic packaging system requirements. Food-contact or clinical sample contact also falls under FDA 21 CFR 177.1520 and Regulation (EU) No 10/2011 when articles are marketed in the European Union. Addition ratios are deliberately narrow: non-leaching pigment masterbatch 0.5–1.5 wt%, slip masterbatch 0.05–0.2 wt%, and reprocessed material at 0–10 wt% only from the same heat and validated under ISO 13485:2016 production controls. Processing is carried out on all-electric injection moulding machines with screw L/D 20:1 to 22:1, melt temperature 190–220°C, mould temperature 10–30°C, and cycle times of 8–14 s for multi-cavity tools. Finished product types include screw-cap specimen cups from 30 mL to 120 mL, analyser reservoirs, and diagnostic kit base trays.
Published data for this specific medical configuration is limited; qualification therefore requires application-specific migration and cytotoxicity testing rather than reliance on generic HDPE datasheet values. The process boundary is not the injection moulding operation but the traceability of reprocessed material and the absence of cross-contamination in shared materials-handling systems.
Closed-loop regrind at 20–30 wt% alters shot-to-shot viscosity and can produce short-shot drifting on high-cavitation stack moulds if the virgin feed index is not adjusted. The HDPE 8300 base resin, with melt flow index of 30 g/10 min under ASTM D1238, permits regrind addition up to 20 wt% in food-contact applications without re-validation of FDA 21 CFR 177.1520 if the regrind is clean in-house scrap of the same formulation. Above 20 wt%, converters should monitor melt pressure coefficient and reduce injection velocity by 5–10% to compensate for the higher melt viscosity of heat-history material. Addition ratio adjustments for this regrind window are: fresh colour masterbatch 1.0–2.0 wt%, antioxidant masterbatch 0.2–0.5 wt%, and slip/antiblock split 0.1–0.3 wt%. Processing on stack moulds is maintained at melt temperature 200–225°C and mould temperature 10–25°C; hold pressure of 40–65 MPa is verified by weight per cavity. Finished product types include thin-wall deli containers, disposable lids, and portion cups.
In field trials on 8+8-cavity stack moulds, cavity-to-cavity weight variation above 1.2% was correlated with non-uniform regrind particle size distribution from low-cost granulators with worn blades; the remedy is granulator blade service and screen aperture verification at 8 mm or below. Pre-drying is not normally required for HDPE 8300 if silo residence is below 4 h at ambient relative humidity below 65%; above this condition, hopper drying at 70–80°C for 2–3 h is applied.
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Chevron Phillips Chemical HDPE 8300 is supplied as a high-density polyethylene resin in pellet form. Classification as high-density polyethylene falls under ASTM D883-22, which requires density greater than 0.940 g/cm3 at 23 °C; exact lot density for HDPE 8300 should be taken from the supplier certificate of analysis using ASTM D792-20 or ISO 1183-1:2019. The grade is specified for melt-processing operations in which melt strength, stiffness, and resistance to environmental stress cracking jointly determine part performance. The model designation HDPE 8300 is a trade code rather than a direct descriptor of density or melt flow rate; numerical suffixes within the manufacturer’s portfolio separate processing envelopes but do not replace lot-specific data. Because the public product data sheet for this specific grade was not independently retrievable for this evaluation, the following treatment distinguishes class-level high-density polyethylene behavior from grade-specific claims requiring supplier certification.
Material handling for HDPE 8300 follows standard polyolefin practice. Resin stored in sealed packaging below 60% relative humidity generally enters the extruder without pre-drying. If condensation is visible on pellet surfaces or storage has occurred above 60% relative humidity, a hopper dryer set at 80 °C for 2 h is a common industrial measure for removing surface moisture. Pneumatic conveying should maintain pellet temperature below 50 °C to prevent agglomeration in fines-rich systems. Dust control at the loading port should comply with NFPA 654 criteria for combustible particulate handling. Pellets are fed to single-screw extruders equipped with barrier screws and grooved feed sections; barrel L/D ratios from 24:1 to 30:1 are typical for fractional-melt high-density polyethylene.
In extrusion blow molding, melt temperature is a primary control variable for parison weight, die swell, and wall thickness distribution. For high-density polyethylene grades in the fractional-melt range, melt temperature measured at the die exit is commonly controlled between 190 °C and 230 °C. Excursions above 240 °C accelerate thermo-oxidative chain scission, producing gel particles and reducing parison melt strength. Below 180 °C, incomplete melting of the high-molecular-weight fraction can produce surface weld lines and periodic wall thickness variation on shuttle machines. On a 75 mm single-screw extruder with barrier screw, barrel zone settings are generally profiled from 170 °C at the feed throat to 210 °C at the die head; the actual profile for HDPE 8300 should be adjusted to the certified melt flow rate and screw recovery capacity.
Wall thickness uniformity is further controlled through parison programming with servo-driven die gap actuation. On a 2+2 shuttle blow molding machine producing a 20 L monolayer container, the programmer profile typically uses a narrower die gap at the top and tail of the parison and a wider gap at the midsection to compensate for sag. Die gap range for HDPE 8300 is commonly 0.8 mm to 2.0 mm, adjusted for melt strength and swell. A die gap below 0.6 mm may induce shear-dominated melt fracture at normal extrusion rates; a gap above 2.5 mm can reduce distribution precision at the neck and chime regions. Parison sag is measured on-line by comparing parison length at extrusion start and after a fixed hang time. For fractional-melt HDPE at 200 °C, sag below 10% over 5 s is a practical target for large containers. If HDPE 8300 exhibits sag above 15%, die gap reduction and lower melt temperature should be evaluated before increasing programmer steps.
On accumulator-head machines producing larger industrial containers, accumulator volume and fill time interact with molecular weight distribution. A fractional-melt HDPE typically requires lower screw back pressure than a high-molecular-weight film grade to maintain fill rate; back pressure settings from 10 MPa to 20 MPa are common starting points for extruders with 30:1 L/D. When HDPE 8300 is purged after a lower-viscosity LLDPE or LDPE, barrel displacement purging should continue for 8 to 12 barrel capacities because viscosity mismatch traps low-viscosity resin in screw channels. Insufficient purging can produce intermittent surface haze and local loss of environmental stress crack resistance at the pinch-off weld line. Tooling pinch inserts should maintain land width of 0.5 mm to 1.0 mm; sharp inserts improve part separation but concentrate stress in the pinch seam.
Differences between HDPE 8300 and high-flow HDPE injection grades are expressed primarily through melt flow rate and molecular weight. Injection molding grades in the manufacturer’s portfolio may have melt flow rates above 6 g/10 min under ASTM D1238-20 Procedure A at 190 °C with 2.16 kg; blow molding and sheet extrusion grades intended for HDPE 8300 are generally specified below 1 g/10 min to provide parison melt strength and die swell. Lower melt flow rate reduces flow length in injection tools and makes HDPE 8300 unsuitable for thin-wall injection molding with long flow paths without flow simulation. It also increases energy input and melt pressure during extrusion. Conversely, higher molecular weight contributes to slower stress crack growth under external load, measured by ASTM D1693-15 Condition B. The exact melt flow rate for HDPE 8300 must be confirmed from the product technical data sheet before tooling decisions.
Compared with linear low-density polyethylene, HDPE 8300 has higher crystalline density, higher flexural modulus, and lower gas permeability. High-density polyethylene class density ranges from 0.940 g/cm3 to 0.970 g/cm3; linear low-density polyethylene is below 0.940 g/cm3 per ASTM D883-22. This difference provides higher top-load strength in rigid containers but reduces low-temperature dart impact resistance. For service below −20 °C, a tougher LLDPE or an impact-modified formulation may be required; HDPE 8300 should not be selected where low-temperature ductility is the primary design variable without validation using ASTM D256-23 Izod or ASTM D3763-18 puncture testing.
Without grade-specific gel permeation chromatography data, the molecular architecture of HDPE 8300 cannot be fully described from public sources. Blow molding HDPE resins often require a moderately broad molecular weight distribution to balance die swell and parison sag; polydispersity index between 5 and 20 is common in commercial unimodal Ziegler-Natta HDPE grades. Broad distribution improves shear thinning during extrusion but may reduce ultimate tensile elongation relative to metallocene-catalyzed narrower-distribution resins. The comonomer type controls short-chain branching length; at equal density, a hexene-modified HDPE generally exhibits higher environmental stress crack resistance than a butene-modified HDPE because longer short-chain branches more effectively disrupt crystalline lamellae and increase tie molecule concentration. Users should obtain comonomer and molecular weight data for HDPE 8300 for applications requiring long-term hydrostatic pressure performance or aggressive chemical exposure.
Rheological characterization is necessary because melt index alone does not predict extrusion pressure or parison sag. Capillary rheometry according to ISO 11443:2021 or ASTM D3835-16 provides apparent shear viscosity from 100 s−1 to 10,000 s−1 at 190 °C, 210 °C, and 230 °C. In extrusion blow molding, die shear rates often fall between 500 s−1 and 5,000 s−1; in sheet extrusion, lip shear rates can exceed 10,000 s−1. If a resin with excessive low-shear viscosity is processed at high output, melt pressure at the die may exceed 30 MPa, requiring a pressure-compensated extruder and hardened screw tip. HDPE 8300 is typically processed on extruders with grooved feed sections that improve throughput stability; screw speed should not be increased to compensate for high head pressure if the melt temperature approaches the upper processing limit.
In sheet extrusion and thermoforming, HDPE 8300 may be selected where a high-melt-strength resin is needed to minimize sag during heating. A single-screw sheet line with 120 mm barrier screw and three-roll stack is typically operated with melt temperature from 200 °C to 220 °C for fractional-melt HDPE; roll temperatures are kept at 70 °C to 90 °C to control crystallization and sheet flatness. Thermoforming requires precise sheet surface temperature, often 130 °C to 160 °C depending on draw ratio. Local overheating above 170 °C produces gloss variation and increases sag, while sheet below 120 °C may develop stress whitening at draw ratios above 3:1. Mold temperature should remain below 60 °C to avoid excessive cycle time; plug assist speed should be controlled to avoid cavity wall thinning below 0.25 mm in high-draw corner regions.
Lot acceptance testing for HDPE 8300 should follow the methods shown in the table. The table lists the standard test method, measured property, condition, and interpretation relevant to rigid packaging and sheet applications. Specific acceptance limits must be obtained from Chevron Phillips Chemical for the grade and end-use requirement.
| Property | Test method | Condition | Interpretation for HDPE 8300 |
|---|---|---|---|
| Melt flow rate | ASTM D1238-20, ISO 1133-1:2022 | 190 °C, 2.16 kg | Indicates extrusion load and flow length; lower values correspond to higher viscosity |
| Density | ASTM D792-20, ISO 1183-1:2019 | 23 °C | Confirms high-density polyethylene class above 0.940 g/cm3 |
| Tensile yield strength | ASTM D638-22 | Type IV specimen, 50 mm/min | Indicates short-term load capacity and stiffness |
| Flexural modulus | ASTM D790-17 | Procedure A, 1.3 mm/min | Correlates with stacking strength of rigid containers |
| Environmental stress crack resistance | ASTM D1693-15 | Condition B, 50 °C, 10% Igepal CO-630 | Predicts resistance to stress cracking in aggressive contents |
| Food contact status | FDA 21 CFR 177.1520(c) | Olefin polymers | Requires supplier certification for specific food-type and use conditions |
Top-load performance of HDPE 8300 containers is influenced by density and wall thickness distribution. An increase in density from 0.950 g/cm3 to 0.960 g/cm3 can raise flexural modulus by roughly 150 MPa to 300 MPa, improving top load but potentially reducing environmental stress crack resistance. For aggressive liquids such as bleach or liquid detergent, users should test bottles under 50 °C in 10% Igepal CO-630 per ASTM D1693-15 Condition B. Published data for this specific configuration is limited; qualification cannot be based on density or melt flow rate alone.
Post-industrial scrap from HDPE 8300 processing can be ground and reintroduced at the feed throat if the grind is free of dust and fines. Fines content below 0.5% by weight helps avoid feed bridging and surging in grooved feed extruders. Reprocessing should use a breaker plate with a 40-mesh screen to remove degraded particles. The retained molecular weight of HDPE helps stabilize the parison during reprocessing, but repeated heat histories consume antioxidant package. If the recycled fraction exceeds 30% by weight, oxidative induction time measured by ASTM D3895-19 at 200 °C may fall below 20 min, indicating reduced melt stability; in such cases, addition of a polyethylene-compatible antioxidant masterbatch should be verified with the additive supplier.
Operational boundaries apply when HDPE 8300 is used on blow molding or sheet lines that also process polar polymers. Residual polyvinyl chloride must be removed before introducing HDPE 8300 because the incompatible polymers produce delamination and surface defects; mechanical purging with a high-viscosity HDPE or dedicated commercial purge compound is required. Contact with strong oxidizing acids, prolonged ultraviolet exposure, or storage at temperatures above 50 °C can degrade the resin and shorten service life. For outdoor applications, carbon black or an approved UV stabilizer package should be verified; natural grades are not generally suitable for prolonged outdoor exposure beyond 12 months. Color concentrate carriers and additives should be evaluated for compatibility because high levels of unsaturated oils or certain hindered amine light stabilizers may alter environmental stress crack resistance of the base resin. Side-by-side testing per ASTM D1693-15 Condition B is required before production release.
