| HS Code | 873638 |
| Material | MOPLEN PP HP500D |
| Polymer Type | Polypropylene Homopolymer |
| Density | 0.900 g/cm³ |
| Melt Flow Rate | 1.8 g/10 min (230°C/2.16 kg) |
| Tensile Strength At Yield | 36 MPa |
| Elongation At Yield | 12% |
| Flexural Modulus | 1800 MPa |
| Izod Impact Strength Notched 23c | 4 kJ/m² |
| Heat Deflection Temperature 0 45mpa | 100 °C |
| Vicat Softening Temperature | 155 °C |
| Rockwell Hardness | R 100 |
| Melting Temperature | 166 °C |
As an accredited MOPLEN PP HP500D factory, we enforce strict quality protocols—every batch undergoes rigorous testing to ensure consistent efficacy and safety standards.
| Packing | MOPLEN PP HP500D is packaged as solid pellets in 25 kg multilayer paper bags, palletized and shrink-wrapped for safe transport. |
| Container Loading (20′ FCL) | MOPLEN PP HP500D supplied in 20′ FCL, packed in 25 kg woven bags on pallets, shrink-wrapped for safe transport. |
| Shipping | MOPLEN PP HP500D is a polypropylene homopolymer resin shipped as non-hazardous material. It is supplied in moisture-protective bags, octabins, or bulk containers. Store in dry, ventilated area away from direct sunlight and heat. Avoid dust accumulation; use proper handling equipment to prevent bag damage and contamination. |
| Storage | Store MOPLEN PP HP500D in a cool, dry, well-ventilated area, away from direct sunlight, heat, and ignition sources. Keep containers tightly sealed to prevent moisture pickup and contamination. Avoid prolonged storage at high temperatures. No special hazard precautions are required beyond standard polymer handling, but maintain good housekeeping to minimize dust accumulation. |
| Shelf Life | Shelf life is indefinite when stored in original, sealed packaging away from direct sunlight, heat, and moisture. |
Single-screw extrusion lines used to produce 0.8–1.5 mm deep-draw stock from MOPLEN PP HP500D are set with a flat barrel profile of 210–235 °C across zones 1–4, while adaptor and flat die zones are held at 235–245 °C. The low melt flow rate of 0.5 g/10 min determined under ISO 1133-1:2022 with 2.16 kg at 230 °C confers high zero-shear viscosity, which manifests as reduced sag in thermoforming sheets; hanging indices below 12 mm for a 300 mm draw depth have been recorded on pilot lines with top-clamp automatic sheet feeding. Chill roll temperatures of 18–22 °C on the polish roll and 24–28 °C on the structured roll freeze the polypropylene homopolymer surface rapidly, producing a fine skin spherulite layer that controls haze to 40–60 % in 0.8 mm sheet when measured under ASTM D1003. The melt strength is further exploited in plug-assist thermoforming of rectangular trays. Cavity draw ratios of 3:1–5:1 are run with sheet surface temperature at 155–170 °C on the clamp frame side and 145–160 °C on the plug side. Preheated PEEK plugs are held at 100–120 °C, and plug speed is limited to 80–150 mm/s to avoid local thinning in the tray radius. Food-contact compliance for these trays follows Regulation (EU) No 10/2011 with an overall migration limit of 10 mg/dm² under test condition OM1 for refrigerated filling and OM2 for short-contact service at 70 °C or above. Terminal articles include meat trays, cheese inserts, and modified-atmosphere packaging bases sealed with polyester-based lidding films on form-fill-seal lines.
Pipe extrusion of MOPLEN PP HP500D is carried out on grooved-feed single-screw extruders with L/D 30:1–36:1 and screw compression ratios of 3.0:1–3.5:1. Barrel temperatures are stepped from 180 °C at the feed throat to 220 °C at the breaker plate, while measured melt temperature at die entry remains within 200–215 °C. The lower processing temperature relative to random copolymer pipe grades reduces thermal degradation of the phenolic-phosphite stabiliser package and holds melt residence time below 8 min at 240 °C. Spiral mandrel heads with 6–8 grooves and land length ratios of 10:1 distribute the melt homogenously; a melt pressure variation below 2 % is required to avoid wall thickness drift. Vacuum calibration sleeves are set at 12–20 °C with a vacuum of 0.4–0.7 bar, and haul-off speed is slaved to wall thickness measurement on SDR 11 and SDR 17 geometries. PP-H pipes produced from homopolymer are classified under ISO 12162 with an MRS 10 MPa rating; long-term hydrostatic strength is statistically extrapolated to 50 years under ISO 9080 regression. The practical service boundary is low-temperature ductility. At 0 °C the notched Charpy impact of HP500D homopolymer falls below 2.0 kJ/m² under ISO 179-1, and pressure service below 0 °C is not recommended. For cold-water distribution in unheated spaces, a random copolymer or PP-B grade should be considered because the homopolymer does not retain sufficient impact resistance under frozen surface conditions. Terminal pipes serve industrial water transfer, acid-alkaline effluent, and drainage systems where continuous fluid temperatures remain below 60 °C.
| Application segment | Standard or regulation | Numerical threshold or test condition |
|---|---|---|
| Thermoformed food-contact sheet | Regulation (EU) No 10/2011 Annex II; EN 1186-1 | Overall migration limit 10 mg/dm²; OM2 at 70 °C for 2 h |
| PP-H pressure pipe | ISO 12162; ISO 9080 | MRS 10 MPa; 50-year hydrostatic strength regression |
| UN-certified blow moulded jerricans | ADR/RID 6.1.5.3 | PG II drop height 1.2 m at -18 °C; stack load 24 h at 40 °C |
| Oriented strapping tape | ISO 527-3; ASTM D2259 | Draw ratio 6:1–8:1; shrinkage ≤4 % |
| Extruded PP foam sheet | ISO 845; ASTM D3575 | Apparent density 0.55–0.75 g/cm³; service ceiling 100 °C dry heat |
In extrusion blow moulding of industrial 3–10 L polypropylene jerricans, the parison is formed from HP500D at a melt temperature of 210–225 °C measured at the die bushing. A diverging die gap of 1.8–3.0 mm and parison programming with 10–30 points are used to compensate for swell and sag; the low melt flow rate keeps parison drawdown below 8 % over a 650 mm drop on 5 L bottle tools. Blow pressure is set at 0.6–0.8 MPa, and mould temperature is held at 15–30 °C by circulating water. Pinch-off flash thickness below 0.3 mm after trimming indicates adequate melt temperature and pre-pinch cooling. For jerricans transporting hazardous liquids, the design must pass the ADR/RID 6.1.5.3 drop test. Packaging group II jerricans with a relative density not exceeding 1.2 are conditioned at -18 °C and dropped from 1.2 m onto a concrete impact plate. Stack load testing per ADR/RID 6.1.5.3 requires 24 h at 40 °C with no leakage or rupture. Terminal articles are tight-head or open-head UN-certified containers with screw closures and EPDM gaskets. Silicone-based release agents are avoided during moulding because transfer to the sealing surface compromises closure torque retention and complicates leak testing under ISO 16104 at 20–25 °C.
MOPLEN PP HP500D is extruded through a T-die with internal deckle widths of 1.0–1.6 mm onto a water quench tank held at 30–38 °C. The cast sheet is slit into 5–8 mm wide tapes and passed through a hot-air orientation oven at 130–150 °C. The tape is stretched at a draw ratio of 6:1–8:1, a range that balances tensile strength with edge fibrillation resistance. Above 8:1, the homopolymer molecular orientation increases fibrillation and creates visible edge splitting because the low melt flow index narrows the stable draw window. The drawn tape is annealed at 100–120 °C under 3–5 % relaxation to reduce shrinkage below 4 % when tested per ASTM D2259. Final tape thickness of 0.3–0.5 mm reaches tensile strength at break of 350–450 MPa measured under ISO 527-3. For polypropylene strapping in contact with carton surfaces, static coefficient of friction is controlled to 0.35–0.50 by adding slip additives such as erucamide at 1,000–1,500 ppm. The terminal article is heavy-duty hand strapping and machine strapping for textile bales and corrugated pallets. Production personnel should not assume the draw ratio characteristics of linear low-density polyethylene tape lines transfer to HP500D; the induction time at 140 °C is shorter and the necking point is sharper, requiring precise oven profile control to maintain tape width deviation below ±0.2 mm.
Rope-grade monofilament production from HP500D uses a 60–75 mm single-screw extruder with a gear melt pump to hold pressure variation below 0.5 MPa. The melt stream is filtered through a 25–40 µm screen pack and exits through multi-hole spinneret dies with capillary diameter 0.8–1.2 mm and L/D 4:1. First-stage quench water is set to 30–40 °C; quench length of 600–900 mm is sufficient because the homopolymer crystallises faster than PP random copolymers and develops a smectic skin. The as-spun filament is drawn in two stages: first-stage draw 6:1–7:1 at 120–135 °C, second-stage draw 1.2:1–1.5:1 at 140–150 °C. Total draw ratio is limited to 8:1–10:1. Annealing at 100–115 °C under 5 % relaxation reduces boiling shrinkage to below 3 %. Final monofilament diameter of 0.2–0.4 mm reaches tensile strength of 350–450 MPa and elongation at break of 15–25 %, determined by ISO 527-3. The material is used in baler twine and rope constructions where chemical resistance to dilute acids and alkalis is required. HP500D should not be substituted into fine-denier textile yarns below 300 dtex, because the low melt flow index creates high die pressure and frequent filament breakage during start-up.
PP foam sheet lines using HP500D are processed on a twin-screw extruder with L/D 44 and a screw design containing distributive mixing elements. Die temperature is held at 155–165 °C to prevent premature gas evolution before the melt leaves the die lips. A chemical blowing agent of endothermic sodium bicarbonate/citric acid blend is added at 0.5–1.5 wt%. Talc nucleation at 0.5–1.0 wt% with median particle size 1.0–2.0 µm creates cell density of 105–106 cells/cm³; apparent density reduction to 0.55–0.75 g/cm³ is achieved under ISO 845. CO₂ release at 160–210 °C matches the crystallisation plateau of the homopolymer, allowing cell growth to stabilise before the three-roll stack at 20–40 °C quenches the sheet gauge of 2–5 mm. Post-foaming shrinkage below 1 % requires annealing at 80 °C for 30 min. The upper service temperature is 100 °C in continuous dry-heat exposure; above this, oxidative degradation begins within 30 days unless stabiliser upgrades are added. Terminal products are returnable transit trays and protective dunnage liners for automotive parts where the closed-cell structure reduces surface abrasion and cut-through.
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MOPLEN PP HP500D is a polypropylene homopolymer grade supplied in pellet form for high-viscosity sheet extrusion and subsequent thermoforming. The grade is manufactured by LyondellBasell under the MOPLEN trade name and belongs to the class of low-melt-flow polypropylene homopolymers. Representative values published in the product technical literature include a melt flow rate of 0.8 g/10 min at 230 °C/2.16 kg according to ISO 1133-1:2022, density of 0.900 g/cm³ according to ISO 1183-1:2019, tensile modulus of 1500 MPa per ISO 527-1/-2:2012, tensile stress at yield of 34 MPa, tensile strain at yield of 8%, Charpy notched impact strength of 4.5 kJ/m² at 23 °C and 2.0 kJ/m² at −20 °C per ISO 179-1/1eA:2010, Vicat softening temperature A50 of 154 °C per ISO 306:2022, and heat deflection temperature B of 98 °C per ISO 75-2:2013. These values are representative datasheet values, not specification limits; lot-specific certificates of analysis govern acceptance testing.
The principal usage of HP500D is extruded polypropylene sheet for thermoformed packaging, technical trays, and semi-rigid containers. Sheet thickness capability ranges from approximately 0.3 mm to 5 mm across typical industrial lines. The grade differs from general-purpose high-flow homopolymers with melt flow rates above 12 g/10 min because the lower melt flow rate produces higher melt strength and better unsupported web stability during sheet extrusion, while at the same time increasing extruder head pressure and making thin-wall injection molding impractical. The grade also differs from random copolymer PP in its higher stiffness and higher Vicat softening temperature but lower notched impact resistance at and below 0 °C; the absence of ethylene segments is directly responsible for both effects.
The melt strength of HP500D is not always stated in the standard datasheet; the low melt flow rate serves as an indirect index of melt strength and sag resistance. No ISO or ASTM standard method for polypropylene melt strength is referenced in the public datasheet. Empirical production-scale assessments typically measure web sag length at fixed sheet gauge and melt temperature or observe thermoforming draw ratio at a fixed blister height. The difference in processing behaviour relative to a 12 g/10 min homopolymer becomes visible at sheet widths above 800 mm, where unsupported web sag is the primary cause of edge gauge variation.
| Property | Test method | Typical value |
| Melt flow rate at 230 °C/2.16 kg | ISO 1133-1:2022 | 0.8 g/10 min |
| Density | ISO 1183-1:2019 | 0.900 g/cm³ |
| Tensile modulus | ISO 527-1/-2:2012 | 1500 MPa |
| Tensile stress at yield | ISO 527-1/-2:2012 | 34 MPa |
| Tensile strain at yield | ISO 527-1/-2:2012 | 8% |
| Charpy notched impact at 23 °C | ISO 179-1/1eA:2010 | 4.5 kJ/m² |
| Charpy notched impact at −20 °C | ISO 179-1/1eA:2010 | 2.0 kJ/m² |
| Vicat softening temperature A50 | ISO 306:2022 | 154 °C |
| Heat deflection temperature B | ISO 75-2:2013 | 98 °C |
When HP500D is evaluated as a replacement for random copolymer polypropylene in hot-fill packaging and semi-rigid containers, the primary mechanical advantage is an increase in heat resistance. The Vicat softening temperature A50 of 154 °C and heat deflection temperature B of 98 °C exceed the typical values for many random copolymers, which commonly fall near 130 °C and 80 °C under the same methods. This margin allows HP500D sheet to tolerate higher hot-fill or microwave contact temperatures before dimensional distortion occurs. The tensile modulus of 1500 MPa is also higher than the 900–1100 MPa range frequently reported for random copolymer sheet at comparable test conditions, producing a more rigid sidewall structure at equal gauge.
The trade-off is toughness. The Charpy notched impact strength at 23 °C of 4.5 kJ/m² declines to 2.0 kJ/m² at −20 °C. Random copolymers and heterophasic impact copolymers retain a larger fraction of impact resistance at freezer temperatures. HP500D is therefore not the correct material choice for deep-freeze containers or for applications requiring drop-impact toughness at sub-zero service conditions unless additional design features compensate for the lower fracture energy. A direct substitution into a random copolymer tool designed for deep-freeze use is likely to produce notch-sensitive cracking rather than gross yielding. Published data for this specific configuration is limited beyond the standard Charpy comparison.
Compared with high-MFR homopolymers, HP500D also shifts the processing trade-off. A melt flow rate of 0.8 g/10 min corresponds to a higher melt viscosity. In sheet extrusion this is beneficial because the unsupported melt web emerging from the die does not sag as readily as a 12 g/10 min or 25 g/10 min homopolymer at the same melt temperature. However, screw torque, melt pump inlet pressure, and die pressure are higher. Thin-wall injection molding is generally impractical for wall sections below 1 mm because filling pressures may exceed the clamp force capacity of medium-tonnage machines. The central trade-off is therefore melt-processability against melt strength and heat resistance.
The processing difference also affects regrind strategy. HP500D is more sensitive to regrind-induced viscosity reduction than high-MFR grades because the low initial melt flow rate provides a smaller margin before the material behaviour shifts toward sag-prone sheet. Converters should limit regrind to 30 wt% maximum and verify melt flow rate after regrind addition according to ISO 1133-1:2022.
Sheet extrusion lines processing HP500D are typically configured with a single-screw extruder having a minimum 24:1 L/D and a barrier screw. A compression ratio between 2.5:1 and 3.0:1 is commonly specified, although published vendor bulletins for high-viscosity PP homopolymers do not mandate a single universal design. Screen packs in the 60/80/100 mesh range are used to filter unmolten heterogeneities, but excessive screen-pack trapping increases melt temperature and pressure. Barrel profiles normally rise from 200 °C in the feed zone to 230 °C in the metering zone, with melt temperature held between 220 °C and 250 °C. Die temperature is maintained between 230 °C and 250 °C to prevent die-lip freeze-off and melt fracture.
The upper processing boundary is governed by thermo-oxidative degradation. Residence time above 280 °C should be avoided because chain scission increases melt flow rate and reduces melt strength, producing sheet that sags excessively and thermoforms with variable wall thickness. At the lower boundary, melt temperatures below 210 °C raise melt viscosity to the point where melt fracture at the die lip becomes visible as transverse sharkskin lines. The practical operating window therefore runs from approximately 210 °C to 260 °C at the melt, with the upper region reserved for short residence times.
A documented failure mode in high-viscosity PP sheet extrusion is the gradual drift of melt flow rate upward after repeated scrap recycling at high temperature; converters should limit regrind to 30 wt% maximum and verify melt flow rate after regrind addition to avoid loss of sag resistance. Melt-pressure stability is another process boundary. On production lines with 75 mm single-screw extruders and 30:1 L/D barrier screws, thickness variation below ±2% is associated with melt-pressure variation within ±1.5 MPa at the screen changer; wider pressure swings produce gauge bands in thin sections. However, these values are line-specific and should be validated against commissioning records rather than treated as universal limits.
Chill-roll temperature is set between 20 °C and 40 °C for gauge control. A lower chill-roll temperature increases sheet gloss but can induce residual stresses that later cause warpage in thermoformed parts; a higher temperature improves crystallization and dimensional stability but reduces line speed. Drying is not normally required because polypropylene is non-hygroscopic. Surface condensation on pellets stored outdoors in high relative humidity should be removed with a hopper dryer at 80 °C for 2 h before extrusion.
Incompatibilities include blending with high levels of ethylene-containing copolymers without adjusting for the reduction in stiffness and heat resistance. The same applies to addition of low-melting nucleation packages or certain slip agents above supplier-recommended loadings; migration kinetics of slip agents in high-viscosity PP sheet may be slower than in high-MFR grades, and surface bloom may not reach equilibrium before thermoforming if additive masterbatches are changed. When additive levels are changed, the final sheet surface coefficient of friction should be rechecked with ISO 8295:1995 before packaging line acceptance. Avoid combination with amine-based additives at high processing temperatures because of potential discoloration and stabilizer antagonism; published data for this specific interaction in HP500D is limited, but the incompatibility is documented for PP homopolymer stabilizer packages generally.
Plug-assisted thermoforming of HP500D sheet involves a narrower processing window than many lower-viscosity random copolymers because the same high molecular weight that provides sag resistance also slows deformation and orientation. Sheet surface temperature is typically held between 155 °C and 165 °C. At surface temperatures below 150 °C, localized whitening and craze-like surface defects appear at the plug contact zone and the part may fracture during demolding. Above 170 °C, the sheet webs between mold cavities begin to sag and pre-stretch, producing uneven material distribution and thick corners with thin sidewalls.
Plug speed and plug temperature interact directly with the grade’s elongation behaviour. Unheated metal plugs can chill the sheet below the forming temperature, creating a visible plug mark and local thinning. Syntactic foam plugs or heated PEEK plugs are preferred because they reduce heat loss and allow plug speed in the range of 0.2 m/s to 0.8 m/s. At draw ratios greater than 3:1, local sidewall thickness below 0.25 mm can occur when sheet surface temperature is below the lower bound or when plug depth is excessive. Published data for this specific configuration is limited; converters should derive the practical draw ratio limit from their own cavity geometry and sheet extrusion gauge tolerance.
Mold temperature is normally maintained between 20 °C and 50 °C. Mold temperatures above 50 °C extend cooling time and increase post-mold shrinkage, while temperatures below 20 °C cause surface condensation in humid environments and can produce brittle parts. Post-mold shrinkage in unconstrained areas typically falls between 1.5% and 2.0% for PP homopolymer sheet; tooling cutouts and stack features on thermoformed parts should be designed with this shrinkage range in view. The conflict in this process is that higher forming temperature reduces internal stress but increases sag, while lower forming temperature controls sag but reduces part ductility. HP500D shifts this conflict toward the high-temperature side because its melt strength allows a slightly higher forming temperature before sag than a high-MFR homopolymer at equivalent sheet thickness.
The heating phase also influences wall thickness. Quartz or ceramic infrared heaters should bring the sheet core to the forming range without overheating the surface. If surface temperature overshoots above 170 °C during heating, the sheet can stick to the transport chain and imprint defects. A surface temperature probe with infrared pyrometry is recommended; thermocouple contact readings lag the surface response by several seconds and may cause operators to overshoot the setpoint.
For food-contact applications, HP500D is represented as complying with FDA 21 CFR 177.1520 for olefin polymers and with Regulation (EU) No 10/2011 for plastic materials intended to come into contact with food, subject to the end-use conditions and migration limits defined by the manufacturer’s product safety bulletin. REACH and RoHS 2011/65/EU conformity should be verified against the current regulatory datasheet for the specific packaging plant location. The grade is not supplied with UV stabilisation as a default; outdoor service requires a UV-stabilised masterbatch or a different grade. The absence of ethylene comonomer also means that gamma sterilization at high doses can generate discoloration or embrittlement more readily than radiation-stabilized random copolymers. When sterilization is specified, dose mapping and post-exposure mechanical testing under ISO 527-1/-2:2012 should be performed before production release.
| Regulatory domain | Reference | Applicability to HP500D |
| United States food-contact olefin polymers | FDA 21 CFR 177.1520 | Applicable to PP homopolymer; conditions of use apply |
| European Union plastic food-contact materials | Regulation (EU) No 10/2011 | Overall migration limit and specific migration limits apply |
| REACH | EC No 1907/2006 | SVHC screening and authorisation apply to additives |
| Packaging and packaging waste | Directive 94/62/EC | Concentration limits for heavy metals apply |
In injection molding, HP500D is generally not recommended for wall sections below 1 mm, for long flow-length-to-thickness ratios above 200:1, or for living-hinge parts that require repeated flexural fatigue. These restrictions arise from the high melt viscosity and reduced orientation-induced toughness compared with high-flow PP grades. If injection molding is attempted, melt temperatures near the upper end of the processing range and slow injection speeds are required, but published data for this specific configuration is limited.
