| HS Code | 700124 |
| Density | 0.905 g/cm³ |
| Melt Flow Rate 230 C 2 16 Kg | 27 g/10 min |
| Tensile Strength At Yield | 35 MPa |
| Elongation At Yield | 10% |
| Flexural Modulus | 1400 MPa |
| Izod Impact Strength Notched 23 C | 3.0 kJ/m² |
| Heat Deflection Temperature 0 45 Mpa | 90 °C |
| Vicat Softening Temperature A10 | 155 °C |
| Melting Temperature | 163 °C |
| Mould Shrinkage | 1.5% |
As an accredited SIBUR PP Homopolymer PP H270 FF factory, we enforce strict quality protocols—every batch undergoes rigorous testing to ensure consistent efficacy and safety standards.
| Packing | SIBUR PP Homopolymer PP H270 FF is supplied as virgin pellets in 25 kg sealed bags, ready for safe handling and processing. |
| Container Loading (20′ FCL) | 20′ FCL: PP homopolymer granules packed in woven bags on pallets, secured with straps, protected from moisture and heat. |
| Shipping | SIBUR PP Homopolymer PP H270 FF is supplied as free-flowing granules in 25 kg bags or 500–1000 kg big bags, shipped in dry, clean containers. Keep protected from moisture, direct heat, and mechanical damage during transport. Not classified as dangerous goods under ADR/IMDG; handle with standard industrial care. |
| Storage | Store SIBUR PP Homopolymer PP H270 FF in a cool, dry, well-ventilated area, away from direct sunlight, heat sources, and ignition sources. Keep packaging sealed to prevent moisture and contamination. No special storage requirements; protect from mechanical damage. Ensure good housekeeping to avoid dust accumulation. Follow local regulations. |
| Shelf Life | Shelf life is 2 years from production date if stored in dry, cool, shaded conditions away from direct sunlight and heat. |
At the thin-wall conversion end of the SIBUR PP H270 FF application envelope, moulders run cold or hot runner tools with wall stocks from 0.40 mm to 0.80 mm. The grade’s high-fluidity homopolymer architecture allows filling of this section under fast injection velocity, but the benefit becomes a process hazard when gate blush or gas entrapment appears at the valve gate. The typical barrel profile for a general-purpose screw with L/D 22:1 and compression ratio 2.5:1 starts at 230 °C in the rear zone, progresses through 240 °C and 245 °C, and holds 250 °C at the nozzle. Mould temperature is maintained at 20–30 °C with turbulent cold-water circuits; higher mould temperature improves surface gloss but increases cycle time without sufficient property gain in thin sections. Packing pressure is set at 60–80 % of peak injection pressure, and gate freeze is identified by part-weight plateau when hold time is increased in 0.2 s increments. For a 0.6 mm side-gated container, total hold time typically falls between 0.5 s and 1.5 s, after which the cavity is depressurised and the part ejected. If the resin has been stored in cold warehouses and moved into a warmer moulding hall, surface condensation can produce splay; a 80 °C desiccant drying step for 2 h is applied only when condensation is observed or dew point exposure has occurred. The food-contact formulation depends on the converter’s masterbatch selection: a nucleating additive at 0.05–0.15 wt% accelerates crystallisation and shortens cooling time, while erucamide slip additive at 500–1000 ppm reduces denesting friction on stacked dairy cups and deli containers. Both additives must be covered by the final article’s compliance under EU Regulation (EU) No 10/2011 and FDA 21 CFR 177.1520. End-use articles in this subsegment include single-serve dairy cups, takeaway lids, deli containers and thin-wall reusable food boxes.
In high-cavitation closure moulds with 48 to 96 cavities, the governing risks shift from thin-wall fill to gate freeze, sealing-ring roundness and tamper-evident band elongation. The closure wall thickness is frequently 1.8–2.5 mm, which requires longer hold time and makes screw recovery time more likely to control the overall cycle. Melt temperature is usually reduced to 220–240 °C because excessive nozzle temperature accelerates thermal degradation of slip additives and can cause yellowing in natural or light-coloured caps. The tool is run at 15–30 °C; lower mould temperatures reduce cycle time, but if the mould temperature falls below 15 °C, underpacking at the sealing bridge can occur and leakage-torque consistency deteriorates. Sequential valve-gate opening is used in hot-runner systems to balance fill across high cavitation; injection velocity is limited to 60–150 mm/s for a 2.0 mm section to avoid jetting and gate blush. Packing is staged: a first hold at 50–70 % of peak injection pressure for 1.0–2.0 s, followed by a second lower hold until gate freeze at 2.0–5.0 s. The formulation for beverage and condiment closures typically includes erucamide slip at 800–1200 ppm, calcium stearate acid scavenger at 0.05–0.10 wt%, and a colour masterbatch at 1–3 wt%; antistatic additives are used only where dry-product closures require dust resistance. The final cap dimensions must meet the closure manufacturer’s torque and tamper-evident band specifications. Compliance for food-contact caps is assessed on the finished article under EU Regulation (EU) No 10/2011 and FDA 21 CFR 177.1520; pharmaceutical closures may additionally require testing under USP <661.1> after washing and sterilisation. This subsegment is limited to non-carbonated beverage, dairy, condiment and cosmetic closures; pressure-retaining carbonated-soft-drink closures are outside the standard qualification path because long-term creep and CO₂ barrier performance must be proven on the final design with closure-specific validation.
Disposable cutlery moulded from SIBUR PP H270 FF introduces anisotropic shrinkage control as the dominant process variable. In flatware cavities with length-to-width ratios above 15:1, the polymer freezes a high-shear skin oriented in the filling direction, and the core layer relaxes at a different rate; ejection without sufficient pack produces forward or reverse curl along the handle. The processing response is to fill at a profiled velocity, starting at 100 mm/s for the gate area and rising to 180 mm/s for the handle tip, with a short fill-to-pack switch before the cavity reaches 95 % of volume. Barrel temperatures are held at 220–245 °C and mould temperatures at 25–40 °C. Hold pressure is set at 40–60 % of peak injection pressure for 1.0–3.0 s, depending on gate freeze. If post-mould warpage persists, the formulation is adjusted with a nucleating masterbatch at 0.5–1.0 wt% or pigment masterbatch at 2–4 wt% to refine spherulite size and equalise shrinkage. Post-industrial regrind may be added up to 30 wt% only if sieve homogeneity and MFR retention are verified after blending, because higher-viscosity reprocessed material creates short shots in long thin sections. End-use products include forks, spoons, knives, coffee stirrers and ice-cream spoons. Food-contact compliance is demonstrated on the final article under EU Regulation (EU) No 10/2011 and FDA 21 CFR 177.1520.
| Parameter | Thin-wall food container 0.6 mm | Closure 2.0 mm | Cutlery 1.2 mm |
|---|---|---|---|
| Barrel temperature | 230–250 °C | 220–240 °C | 220–245 °C |
| Mould temperature | 20–30 °C | 15–30 °C | 25–40 °C |
| Injection velocity | 120–300 mm/s | 60–150 mm/s | 100–200 mm/s profiled |
| Holding pressure | 60–80 % of peak | 50–70 % of peak | 40–60 % of peak |
| Gate freeze time | 0.5–1.5 s | 2.0–5.0 s | 1.0–3.0 s |
When SIBUR PP H270 FF is used as the carrier or let-down base for talc-filled houseware compounds, the processing objective changes from rapid thin-wall filling to talc dispersion and stiffness gain without losing ductility. In direct dilution at the injection moulding machine, 75–85 wt% of the homopolymer is combined with 15–25 wt% of a talc masterbatch; if additional stiffness is required, a maleic-anhydride-grafted polypropylene coupling agent is added at 1–2 wt% to improve filler-matrix adhesion. A separate compounding step on a corotating twin-screw extruder with L/D 40:1 and kneading blocks is preferred to a simple screw-mixed preblend because talc agglomerates must be disrupted before injection. Barrel temperatures during compounding are held at 200–230 °C; higher temperatures degrade the homopolymer and lower melt viscosity without further improving dispersion. The resulting compound is then injection moulded at 210–240 °C with a mould temperature of 30–50 °C to reduce flow marks on textured surfaces. Back pressure is raised to 10–15 bar during the moulding of the compound to maintain steady melt density and avoid screw slip. The addition of 20 wt% talc typically raises flexural modulus above the unfilled homopolymer value, but notched Charpy impact often falls below 3 kJ/m² measured by ISO 179-1; exact values depend on talc lamellarity and masterbatch carrier resin, and published data for this specific resin/talc masterbatch pair is limited. End products in this subsegment are storage bins, crates, hangers and rigid houseware parts that do not require high-impact performance. If the finished article is intended for food contact, the talc and coupling agent must be covered by the same overall migration and specific migration testing under EU Regulation (EU) No 10/2011; otherwise a non-food REACH declaration under Regulation (EC) No 1907/2006 applies.
The unfilled houseware subsegment uses SIBUR PP H270 FF in moulds where cycle-time reduction and gloss consistency are more important than high-impact toughness. Typical wall thickness ranges from 1.5 mm to 3.0 mm. Melt temperature is maintained at 220–240 °C; mould temperature is set between 30 °C and 45 °C to balance surface gloss and shrinkage. The formulation for opaque articles contains a white or custom-colour masterbatch at 2–5 wt%, with no chemical blowing agent because the grade’s high fluidity is sufficient for most flat sections. For stackable storage containers, the gate location is placed away from the lid seat to reduce weld-line visibility at the sealing rim. Screw back pressure is kept at 5–10 bar to avoid excessive shear heating in the recovery zone. The processing threshold is the transition from low-gloss to high-gloss surface defects at high injection speed; when gloss differences appear, injection velocity is first reduced by 15–20 % and mould temperature is raised in 5 °C steps. Copper-based pigments should be avoided because they act as oxidative degradation catalysts in polypropylene at processing temperatures, causing discolouration and embrittlement. End-use products include kitchen storage boxes, file boxes, bins, baskets and drawer organisers. These articles are not intended for direct food contact unless tested under EU Regulation (EU) No 10/2011; non-food housewares require REACH and RoHS compliance under Directive 2011/65/EU if they contain electrical or electronic components.
For stationery and small appliance parts, SIBUR PP H270 FF is processed in high-gloss, polished tooling where surface finish standards are strict and cycle times are medium. The subsegment includes pencil boxes, document trays, wall-clock housings and small appliance covers. Barrel temperatures of 220–245 °C with a mould temperature of 35–45 °C reduce visible weld lines and flow hesitation in thin rectangular parts. Pigment masterbatch dosing is normally 1–3 wt%; an antistatic masterbatch at 0.5–1.0 wt% may be used for office articles that must not attract dust. Injection velocity is set to 80–150 mm/s and hold pressure to 40–60 % of peak injection pressure. Compliance for non-food articles follows Regulation (EC) No 1907/2006 and Directive 2011/65/EU where applicable. Because these parts often use hot-tip or tunnel gates, gate-stringing and vestige length are controlled by reducing nozzle temperature to 230 °C, holding back pressure at 5–8 bar, and setting screw decompression at 3–5 mm.
| Application segment | Standard or regulation | Typical requirement |
|---|---|---|
| Thin-wall food packaging | EU Regulation (EU) No 10/2011 | Overall migration <10 mg/dm² |
| Thin-wall food packaging | FDA 21 CFR 177.1520 | Olefin polymer article clearance |
| Closures | USP <661.1> | For pharmaceutical closures after washing/sterilisation |
| Cutlery | EU Regulation (EU) No 10/2011 | Specific migration limits for additives under Annex II |
| Housewares | Directive 2011/65/EU | RoHS restricted substances if E/E components present |
| All segments | Regulation (EC) No 1907/2006 | REACH authorisation/restriction check on additives |
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SIBUR PP H270 FF is a pelleted high-fluidity polypropylene homopolymer supplied for fiber spinning, continuous filament extrusion, and thin-gauge injection molding. The grade designation identifies the chemical backbone and target conversion sector: H denotes homopolymer, the 270 field places the resin in the high-flow segment, and FF denotes fiber and filament. The resin is not an impact-modified or random-copolymer grade, and its performance profile follows from the high melt flow of an unfilled homopolymer system.
The nominal density of unfilled homopolymer PP is 0.90–0.91 g/cm³ under ISO 1183-1. The melting peak determined by differential scanning calorimetry is generally 160–170 °C under ISO 11357-3. The grade is commonly described by a melt mass-flow rate of 25–30 g/10 min at 230 °C with a 2.16 kg load under ISO 1133-1. This flow range places H270 FF above standard extrusion grades and below ultra-high-flow injection grades. The high MFR is intended to reduce die pressure and fill fine spinneret capillaries, but it also lowers melt strength compared with lower-flow homopolymers.
The exact molecular weight distribution is not always published. High-flow fiber grades may be produced by direct reactor polymerization or by controlled-rheology modification of a lower-MFR base resin. The distinction affects melt elasticity, die swell, and low-molecular-weight fraction. If the resin is controlled-rheology, the narrower distribution generally improves spinneret cleanliness and reduces die drool, but narrows the stable draw window in filament formation. Oscillatory shear rheology under ISO 6721-10 should be used when process stability must be characterized.
The melt mass-flow rate is a single-point indicator, not a complete viscosity curve. In fiber extrusion, apparent shear rates in the spinneret capillary can reach 10³–10⁵ s⁻¹, and the shear viscosity at these rates controls hydraulic pressure. H270 FF, with an MFR of roughly 25–30 g/10 min, has lower apparent viscosity than a 12 g/10 min homopolymer at the same temperature and shear condition. This reduces melt-pump inlet pressure and permits higher throughput on spunbond and staple-fiber lines. The direct penalty is lower spinline melt strength; the filament is more sensitive to draw resonance and sag when quench air distribution is uneven.
On single-screw extruders with L/D ratios of 30:1 to 36:1, the barrel profile typically begins at 180–200 °C in the feed zone and rises to 230–260 °C in the metering zone and adapter. These settings are line-specific and depend on screw geometry, screen pack, throughput, and melt pump configuration. High-flow grades reduce the screw’s pressure-generating capability; a melt pump suction pressure that falls too low can lead to cavitation, pressure pulsation, and filament count variation.
Batch-to-batch MFR drift of ±2 g/10 min can alter back pressure and spinpack pressure. Tight control of melt temperature and pellet feed uniformity is more important for H270 FF than for lower-flow grades because the resin spends less time in the barrel and the processing window for stable draw is narrower. Melt temperature should be measured directly after the screw tip, not inferred from barrel setpoints.
Polypropylene does not undergo hydrolytic degradation, but surface moisture can produce splay and spinline breaks when pellets are exposed to relative humidity above 60% or transferred from cold storage into a warm production hall. Pre-drying in a hot-air or desiccant dryer at 80–90 °C for 2–4 h is an operational control rather than a chemical drying requirement. The resin should not be held at drying temperature for longer than necessary because prolonged exposure can accelerate additive consumption and discoloration.
For injection molding, barrel temperatures of 220–260 °C and mold temperatures of 20–50 °C are usual for high-flow homopolymer PP. The low melt viscosity shortens fill time and reduces injection pressure, but it can promote jetting, knit-line visibility, and sink in thick sections. Injection power and clamp force are lower than for filled or low-MFR grades at equal shot size, but mold filling must still be balanced to avoid flow-front hesitation and surface defects.
High-speed spunbond and meltblown lines require low melt viscosity at the spin pack. H270 FF is used when the extruder and spin pump are operated at high throughput, typically above 100 kg/h on production-scale spunbond equipment. Spinneret temperatures are normally maintained between 230 °C and 260 °C, and the quench air system is configured for cross-flow or annular cooling. The high MFR lowers the pressure drop across the spin pack and allows higher hole density, but the low melt strength makes the filament bundle vulnerable to overdrawing when the draw ratio exceeds the stable limit.
Compared with a fiber homopolymer having an MFR near 12 g/10 min, H270 FF permits higher mass throughput at the same extruder drive load. However, spinline tension is lower, and the collector speed and quench air temperature must be adjusted to keep filament diameter within specification. A quench air temperature nonuniformity of ±3 °C across the filament bundle can produce measurable denier spread because viscosity changes with temperature. Stable operation is therefore more dependent on air-handling hardware than on resin melt temperature alone.
In staple-fiber and multifilament textile lines, finish-oil application, godet speed, and drawing rolls control final tensile properties. The base resin contributes flow and phase behavior, but the spin finish and drawing conditions determine fiber-to-metal friction and package build. Filament breaks are frequently caused by spin finish instability, damaged spinneret holes, or uneven quench air rather than by the homopolymer resin itself.
H270 FF lacks the ethylene-propylene rubber phase present in impact copolymers. The homopolymer structure gives higher stiffness and higher crystallinity, but notched impact strength at sub-zero temperatures is lower. Under ISO 180/1A at 23 °C, unfilled high-flow homopolymer PP typically shows values of 1.5–3.0 kJ/m²; at -20 °C, the value may fall below 1.5 kJ/m². In contrast, an impact copolymer with a similar melt flow can retain ductile behavior at low temperatures.
Against lower-MFR homopolymers, such as grades with MFR values of 3–12 g/10 min, H270 FF has lower melt strength and lower extensional viscosity. This favors high-speed spinning and thin-wall injection, but it limits sheet and profile extrusion where sagging and draw-down control are critical. The higher MFR also reduces the pressure drop in the die, which can be misinterpreted as a lower-temperature process; the actual melt temperature must still be controlled independently.
Against random copolymers used in transparent packaging, H270 FF has a higher melting peak and higher stiffness, but lower clarity and lower seal initiation. It is not a drop-in replacement for propylene-ethylene random copolymers in heat-seal films or transparent containers.
Tensile properties of unfilled high-flow homopolymer PP are determined under ISO 527-2. A tensile yield stress of 30–35 MPa and an elongation at yield below 10% are typical for this class at 50 mm/min and 23 °C. Flexural modulus under ISO 178 is normally in the range 1300–1600 MPa. Heat deflection temperature under ISO 75-2/B at 0.45 MPa is generally 50–60 °C, and Vicat softening temperature under ISO 306/A50 is approximately 150–155 °C. These values are class-wide ranges for unfilled high-flow homopolymer PP and are not a substitute for the SIBUR certificate of analysis.
Published creep and fatigue data for this specific homopolymer under cyclic loading are limited. For dimensionally stable molded or extruded parts, tensile and flexural data should be supplemented by production-article testing rather than extrapolated from general PP databases. The absence of a copolymer phase also means that long-term load-bearing behavior is more sensitive to temperature and notching than in impact-modified grades.
Thermo-oxidative degradation of polypropylene homopolymer proceeds by chain scission, shifting the molecular weight distribution downward and reducing melt strength. To preserve mechanical properties, melt temperatures should not exceed 280 °C except for very short residence periods. At 260 °C, residence times below 10 min are normally acceptable, but at 280 °C discoloration and viscosity loss can appear after only a few minutes. Frequent-stop processes should purge at the lower end of the melt temperature range and avoid holding the melt at elevated temperature during interruptions.
Converters should monitor melt temperature directly with an immersed thermocouple after the screw tip. A color shift from white to yellow, a fall in melt pressure at constant screw speed, or an increase of 10–15% in melt flow rate relative to feed resin indicate oxidative degradation. The stabilization package marked by the FF suffix is configured for fiber spinning and may not be optimal for long hot-run injection molding or for high-percentage recycled streams with unknown contamination.
Regulatory conformity must be confirmed with the grade-specific certificate. Polypropylene homopolymers in this class are generally assessed under FDA 21 CFR 177.1520 for olefin polymers in food-contact articles and under EU Regulation (EU) No 10/2011 for plastics intended for food contact. Specific migration limits depend on the final additive package and the food simulant; a blanket statement of compliance is not appropriate. For electrical and electronic equipment, compliance with RoHS Directive 2011/65/EU should be verified on the finished component. The base homopolymer does not contain intentionally added lead, cadmium, mercury, hexavalent chromium, PBB, or PBDE above the directive’s threshold limits. The material is not flame-retardant and typically burns as UL 94 HB class.
H270 FF should not be blended with incompatible additives whose carrier resins significantly alter the melt flow balance. Acid-scavenging and antioxidant systems in the base resin can interact with reactive pigments or metal stearates; unknown masterbatches should be evaluated at the intended letdown ratio before production scaling. Mineral-filled masterbatches may reduce melt flow, raise die pressure, and change filament surface characteristics. The operational boundary for pneumatic conveying is determined by pellet geometry and humidity; the resin should be kept dry and protected from dust accumulation.
