| HS Code | 682717 |
| Melt Flow Rate 230 C 2 16 Kg | 27 g/10 min |
| Density | 0.905 g/cm³ |
| Tensile Stress At Yield | 33 MPa |
| Tensile Strain At Yield | 12% |
| Flexural Modulus | 1450 MPa |
| Charpy Notched Impact Strength 23 C | 3.5 kJ/m² |
| Charpy Notched Impact Strength 20 C | 2.0 kJ/m² |
| Vicat Softening Point A10 | 155 °C |
| Vicat Softening Point B50 | 102 °C |
| Heat Deflection Temperature 0 45 Mpa | 100 °C |
| Heat Deflection Temperature 1 8 Mpa | 55 °C |
| Rockwell Hardness R Scale | 100 |
As an accredited SIBUR PP Homopolymer PP H270 GP factory, we enforce strict quality protocols—every batch undergoes rigorous testing to ensure consistent efficacy and safety standards.
| Packing | SIBUR PP Homopolymer PP H270 GP is supplied in 25 kg sealed polypropylene bags, ensuring product purity and safe handling. |
| Container Loading (20′ FCL) | 20′ FCL: SIBUR PP H270 GP homopolymer pellets packed in 25 kg bags, about 25 tons per container. |
| Shipping | SIBUR PP Homopolymer H270 GP is shipped as solid granules in 25 kg bags, octabins, or bulk containers. Protect from moisture, direct sunlight, and heat sources. Transport in clean, covered vehicles or containers with adequate ventilation. Handle carefully to avoid bag damage, and keep away from open flames and strong oxidizers during transit. |
| Storage | Store SIBUR PP Homopolymer PP H270 GP in a clean, dry, well-ventilated area, preferably indoors, away from direct sunlight, heat sources, and open flames. Keep the original packaging sealed to prevent moisture and contamination. Maintain moderate ambient temperature and protect pellets from mechanical damage. No special hazardous storage is required under normal conditions. |
| Shelf Life | Shelf life is indefinite when stored in a cool, dry place away from sunlight, heat, and moisture. |
Thin-wall rigid packaging moulding with SIBUR PP H270 GP exploits a nominal melt flow rate of 27.0 g/10 min at 230 °C/2.16 kg, determined in accordance with ISO 1133-1:2022, Method A. The high flow index permits cavity fill at wall thickness between 0.35 mm and 0.85 mm using flow-path-to-thickness ratios above 200:1 in multi-cavity hot-runner tools. Barrel profile from feed throat to nozzle ranges from 210 °C to 240 °C; injection velocity is set between 200 mm/s and 300 mm/s for 8- to 32-cavity moulds. Mould temperature is held at 10–30 °C with turbulent water cooling to reduce post-mould shrinkage. Packing pressure after fill is typically 25–40 MPa for 0.5–1.5 s, and total cycle time is 4–10 s depending on wall thickness. Formulation practice includes 2.0–4.0 wt% polypropylene-based colour masterbatch, 0.05–0.15 phr calcium stearate as acid scavenger, and 0.08–0.12 phr of a primary phosphite antioxidant. Slip/antiblock packages are added at 0.2–0.5 wt% when stack-nesting requires low surface friction. Although polypropylene is not hygroscopic, surface condensation on cold pellets stored below dew point causes splay; pre-drying at 80 °C for 2 h is applied when ambient relative humidity exceeds 60%. Terminal products include dairy tubs, deli containers, margarine cups, and convenience-food pails. For food-contact use, the grade must be combined with masterbatches and additives that comply with EU 10/2011 and CFR 21 §177.1520(c) 1.1a; overall migration testing is required, not assumed from resin status alone. Low-temperature impact below 0 °C is a known boundary; frozen-food packaging demands an impact-copolymer PP instead.
Closures and caps are moulded from SIBUR PP H270 GP when the design does not require living-hinge endurance beyond 50–100 cycles. Homopolymer PP with MFR 27.0 g/10 min has a lower molecular weight than random copolymer closure grades. Hinge flexural fatigue in polypropylene is chain-architecture-dependent, and published data for this specific configuration is limited. For tamper-evident caps, threaded closures, and snap-on lids, the grade fills short flow paths in 24- to 96-cavity moulds at melt temperatures of 220–245 °C. Mould surface temperature is kept at 12–25 °C; injection time is controlled between 0.4 s and 1.2 s. Holding pressure after gate freeze is typically 25–40 MPa. Gate diameter at the valve-gated hot runner should not fall below 0.6 mm for coloured versions, because pigment agglomerates increase gate-stringing and gate-vestige variation. Formulation practice for food-approved closures includes 1.5–3.0 wt% white masterbatch and 0.05–0.10 phr acid scavenger. Slip agents are minimized below 0.1 wt% to avoid cap torque reduction. Terminal articles are mineral-water and edible-oil screw caps, detergent closures, and pharmaceutical vial over-caps. Compliance is anchored to ISO 1133-1:2022, EN ISO 179-1:2010 for Charpy notched impact, and CFR 21 §177.1520(c) 1.1a for olefin polymers in food contact. For continuous flexing closures, a random copolymer PP with ethylene content 2.0–3.5 wt% is the substitution boundary. PP H270 GP is not recommended for living-hinge closures exceeding 1,000 cycles.
Storage bins, hangers, waste containers, and appliance panels are injection-moulded from SIBUR PP H270 GP at shot weights from 50 g to 1,800 g. The high flow index of 27.0 g/10 min reduces peak injection pressure in thick-section parts but shifts control burden to packing and gate-seal phase. Machine selection uses clamp force of 1.5–2.0 kN/cm² of projected part area for unfilled homopolymer PP. A 500-t machine can therefore hold total projected areas up to about 2,500 cm². Barrel profile from rear to nozzle is 190–230 °C. Screw geometry is a general-purpose three-zone screw with compression ratio 2.2:1–2.8:1 and L/D 20:1–24:1. For dimensional stability in large flat panels, 10–20 wt% talc masterbatch raises flexural modulus from the unfilled class range of 1,400–1,700 MPa (ISO 178) to values above 2,500 MPa, at the cost of increased melt viscosity and weld-line weakness. Mould shrinkage after 48 h at 23 °C is in the range 1.2–1.8% for unfilled and 0.6–1.0% for talc-filled sections. These ranges are quality-control references, not pass/fail limits, and must be re-established per tool. Terminal components include stackable storage crates, clothes hangers, garden furniture footings, and washing-machine detergent drawer housings. Compliance under REACH 1907/2006 and RoHS 2011/65/EU is based on supplier declarations for the base resin and masterbatch pigments. Heavy-metal limits follow EN 71-3:2019 for toy applications. Avoid combining with copper-containing pigment concentrates above 0.05 phr copper because copper ions accelerate oxidation in hot-runner residence zones.
Laboratory and diagnostic device housings demand a balance of high-flow filling, dimensional repeatability, and low extractables. SIBUR PP H270 GP is processed in ISO Class 7–8 cleanrooms at melt temperatures of 210–235 °C and mould temperatures of 10–20 °C. Multi-cavity tools with cold-runner edge gates are common because the high melt flow rate of 27.0 g/10 min allows fill through small gates of 0.8–1.5 mm without excessive shear heating. Injection profiles use two-stage velocity control: first-stage fill at 80–120 mm/s, second-stage pack at 25–35 MPa for 1.0–2.5 s. Lot-to-lot viscosity variation is controlled by the manufacturer through the melt-flow-rate window; converters should request ISO 1133-1:2022 lot certificates and verify weight repeatability at ±0.5% for diagnostic cartridges. Formulation ingredients are restricted: no external release agents, no phthalate plasticizers, no amine-based antistats. Only food-contact- or pharma-appropriate antioxidant systems are accepted. Terminal parts include analyzer housings, pipette tip racks, test-tube racks, and non-implant diagnostic consumable bodies. Regulatory documentation rests on ISO 10993-1:2018 for cytotoxicity when the part contacts biological samples, CFR 21 §177.1520 for polymer compliance, and ISO 13485:2016 for supplier quality agreements. The main substitution boundary against random copolymer PP is low-temperature impact and autoclave load-bearing capacity. Homopolymer PP H270 GP is not suitable for components exposed to steam sterilization above 121 °C under continuous load.
Electrical enclosure injection moulding with SIBUR PP H270 GP uses unfilled homopolymer PP for low-voltage consumer devices and conduit boxes. The standard grade has no flame-retardant package. Published glow-wire data for this exact grade at 3.0 mm is limited; unfilled homopolymer PP of this melt-flow class is generally evaluated at 650 °C according to IEC 60695-2-11:2021. Thin sections below 1.0 mm usually require a flame-retardant compound or material substitution. Moulding conditions follow high-flow practice: melt temperature 210–230 °C, mould temperature 20–40 °C, holding pressure 30–50 MPa, and total cycle 20–35 s for walls up to 2.0 mm. Coloured enclosures use 1.0–2.0 wt% masterbatch; carbon black at 0.2–0.5 wt% is added for UV stabilization only when indoor use includes natural light. Terminal products are junction boxes, switch housings, appliance terminal covers, and cable management clips. Compliance is documented under IEC 60695-2-11:2021, EN 60598-1:2021 for luminaire components, and RoHS 2011/65/EU.
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SIBUR PP Homopolymer PP H270 GP is a general-purpose injection-molding grade supplied as natural or colored pellets. In SIBUR nomenclature, the suffix identifies the high-flow general-purpose homopolymer class; the numerical class corresponds to a nominal melt mass-flow rate of 27 g/10 min measured at 230 °C under a 2.16 kg load per ISO 1133-1:2022. The material has a nominal density of 0.90 g/cm³ per ISO 1183-1:2019 and a narrow molecular weight distribution intended for thin-wall rigid packaging, dairy cups, caps and closures, housewares, appliance parts, and technical components with flow-path-to-wall-thickness ratios above 150:1. Compared with extrusion-grade homopolymers, the high melt-flow rate lowers cavity filling pressure and shortens hold-time requirements, but it reduces melt strength and limits blow-molding or thick-sheet thermoforming. The grade is formulated for general-purpose conversion and should not be considered for long-term hot-water contact above 80 °C without article-specific validation.
Typical data are generated on injection-molded specimens prepared per ISO 294-1:2017 and conditioned at 23 °C and 50% relative humidity. These values are typical and not contractual specification limits. Pigment masterbatch carriers should have a melt-flow difference of less than 15 g/10 min from the base resin to avoid dispersion defects in thin walls. The resin is not formulated for high-clarity applications; homopolymer PP remains opaque even in unpigmented form. Where low-temperature impact or transparency is the controlling requirement, a random copolymer or impact copolymer is generally preferred.
On 1200–1600 kN toggle-clamp injection molding machines equipped with 25:1 L/D general-purpose barrier screws, the high-flow grade permits thin-wall cavity filling at melt temperatures of 220–235 °C. A lower-MFR injection homopolymer of 12 g/10 min typically requires 230–245 °C in the same tool. The pressure drop across a 0.8 mm flash gate can be 15–25% lower for PP H270 GP in multicavity packaging tools, although the reduced melt viscosity also lowers the critical shear stress for gate blush. Back pressure is maintained at 0.5–1.0 MPa; back pressure above 1.5 MPa extends plasticating recovery time without a measurable improvement in homogenization. When screw-recovery speed is set too high, viscous dissipation can raise melt temperature by 10–15 °C because the material has low melt viscosity and a short melting length. This may exceed the recommended maximum melt temperature of 250 °C and initiate stabilizer depletion.
Compared with random copolymer polypropylene of similar MFR, the homopolymer exhibits higher tensile yield stress, higher flexural modulus, and higher Vicat softening temperature, but lower notched impact strength and poor optical clarity. It should not be substituted for random copolymer in freezer-grade containers or in living-hinge packaging that must survive repeated flexing below -20 °C. In a double-gated tensile specimen, weld-line tensile strength for PP H270 GP can be 30–40% lower than the bulk value under ISO 527-2:2012. The low melt strength also produces sag and non-uniform wall thickness in extrusion blow molding and deep-draw thermoforming; those processes are better served by grades with a melt-flow rate below 3 g/10 min or by block copolymers with high melt elasticity.
For systematic comparison under equivalent specimen conditions, the following typical values are derived from producer technical literature. They are not to be interpreted as specification limits. Values refer to 2 mm thick injection-molded specimens conditioned at 23 °C and 50% relative humidity.
| Property / test method | PP H270 GP | Lower-MFR homopolymer 12 g/10 min | Random copolymer 12 g/10 min |
|---|---|---|---|
| Tensile yield stress, ISO 527-2:2012 | 35 MPa | 38 MPa | 28 MPa |
| Elongation at yield, ISO 527-2:2012 | 8% | 9% | 11% |
| Flexural modulus, ISO 178:2019 | 1550 MPa | 1700 MPa | 1100 MPa |
| Notched Charpy impact at 23 °C, ISO 179-1 | 2.0 kJ/m² | 3.0 kJ/m² | 7.0 kJ/m² |
| Heat deflection temperature HDT B, 0.45 MPa, ISO 75-2 | 95 °C | 100 °C | 85 °C |
| Vicat softening temperature A50, ISO 306 | 152 °C | 154 °C | 140 °C |
This comparison clarifies the product position. PP H270 GP trades approximately 2–3 MPa of tensile yield stress and 150 MPa of flexural modulus relative to a lower-MFR homopolymer in exchange for thin-wall flowability. Against a random copolymer of equivalent melt flow, it retains roughly 400–450 MPa higher flexural modulus and 10–12 °C higher Vicat softening temperature, while sacrificing 5 kJ/m² of notched Charpy impact at room temperature. The selection criterion is therefore stiffness and short cycle time rather than impact or clarity.
Mold design for PP H270 GP must account for high orientation and packing sensitivity in thin sections. On a 2 mm plaque, mold shrinkage is typically observed in the range of 1.0–1.4% parallel to flow and 1.2–1.6% perpendicular to flow under a 60 MPa holding pressure, but shrinkage should be measured on the production tool because gate geometry and cooling layout dominate the result. Increasing hold pressure from 60 MPa to 90 MPa can reduce sink depth around a 3 mm boss by 30–40% but may increase gate-region stress. Valve gates or hot-tip systems for 0.8 mm walls should have gate diameters of 1.0–1.5 mm; smaller gates raise shear rate and may initiate jetting. Uniform flow-front advancement is important because the low melt elasticity makes flow hesitation and weld lines more visible than in broad-molecular-weight homopolymers. Cooling circuits should be sized for a heat extraction capacity of 350–450 kJ/kg based on the melt-to-mold temperature difference; insufficient heat removal appears as ejector-pin sticking and cycle-time extension in high-cavity tools.
Production experience with a 16-cavity dairy cup tool on a 1300 kN toggle press indicates that cycle times of 5–7 s are achievable at 0.5–0.7 mm wall thickness. Shot-to-shot mass variation can rise above 0.4% when hot-runner tip temperatures deviate by more than 10 °C between cavities. The resulting non-uniform packing freezes orientation stress and causes brim flatness deviation after ejection. When flatness tolerance is below 0.5 mm across a 90 mm diameter opening, post-mold cooling fixtures are recommended. Screw-recovery speed on a 50 mm screw is typically limited to 0.15–0.25 m/s to avoid melt-temperature overshoot and unstable metering. Published data for this specific configuration is limited for a given tool family, so start-up trials should determine the final hold-pressure and screw-speed window.
The heat deflection temperature under 0.45 MPa is approximately 95 °C, which allows short hot-fill cycles for dairy cups filled at 70–80 °C. Continuous wall temperature above 80–90 °C in air can initiate oxidative chain scission and progressive loss of tensile elongation in general-purpose homopolymer PP. The stabilizer package is not designed for long-term dishwasher exposure at 85 °C or for retort sterilization above 105 °C. Under those conditions, discoloration, surface cracking, or a reduction in notched Charpy impact below 1.5 kJ/m² may occur within the service life. Published data for this specific configuration is limited for extended retort exposure, and final article validation under the actual filling or sterilization profile is required.
Nucleated or talc-filled modifications can increase heat deflection temperature and reduce shrinkage, but the resulting compound is outside the specification of neat PP H270 GP and must be revalidated. Copper-containing hot-runner components, certain alcohols, and aggressive surfactants in detergent packaging can accelerate stabilizer extraction and shorten the oxidative induction time. The grade is therefore normally applied in ambient and short-term warm-fill packaging rather than hot-water engineering components. For repeated hot-water contact, a random copolymer or a stabilized thermoforming grade with documented long-term heat aging is preferable.
Injection molding conditions follow the general requirements for high-flow homopolymer PP. A general-purpose injection screw with L/D 20:1–25:1 and compression ratio 2.5–3.5:1 should be operated with barrel set temperatures from 180 °C in the feed zone to 240 °C at the nozzle. Flat temperature profiles maximize flow length for thin-wall packaging; a reverse profile with a hotter front zone is preferred for closures where gate blush and jetting must be controlled. Mold surface temperatures of 20–40 °C are normal for packaging, while technical parts may use 50–60 °C to reduce post-mold warpage. Packing pressure is generally 60–90 MPa, with transfer from injection to packing at 95–98% of the cushion fill to minimize sink marks. Excessive cushion above 5 mm raises residence time and can generate black specks in extended runs. Cooling time for 0.8 mm wall with cooling water at 15–20 °C is typically 5–8 s in multicavity tools; valve-gate sealing may extend this by 1–2 s.
Drying is not required when pellet moisture is below 0.05 wt%. If the resin is stored in high humidity above 60% RH or moved from a cold warehouse to a warm production hall, a desiccant dryer with a dew point of at least -30 °C and an inlet air temperature of 80 °C for 2–4 h should be used to prevent surface splay, vent clogging, and molded-in moisture defects. Regrind can be introduced up to 20 wt% provided it is free of dust and contamination. The MFR of the regrind should be checked because repeated extrusion can shift melt mass-flow rate by 1–3 g/10 min. If the blend MFR exceeds 32 g/10 min, dimensional control may deteriorate in packaging tools designed for the neat grade.
For food-contact articles, polypropylene homopolymer is generally covered by FDA 21 CFR 177.1520 and by Commission Regulation (EU) No 10/2011 when the finished article meets the overall migration limit of 10 mg/dm² under the applicable food simulant. Compliance must be demonstrated on the final article because color masterbatch, regrind, processing aids, and mold-release agents can alter migration behavior. Specific migration testing under simulants such as 10% ethanol, 3% acetic acid, or vegetable oil may be required depending on food type and contact temperature. The grade is not intended for medical or pharmaceutical applications that require USP Class VI or ISO 10993-1 biocompatibility evaluation. Under Regulation (EC) No 1907/2006, the polymer itself is exempt from registration under Title II, Article 2(9), but monomers and additives must be registered or authorized where required. RoHS requirements are relevant only for electrical or electronic housings; heavy-metal-containing pigments should be excluded if compliance is claimed. The material Safety Data Sheet and supplier compliance statement should be verified against the actual lot before use.
In high-speed packaging lines, the main field limitations for PP H270 GP are melt-temperature conflicts and anisotropic shrinkage. Melt temperature below 220 °C can produce short shots in restrictively gated tools below 0.6 mm wall thickness, while melt temperature above 250 °C can generate stringing, gate drool, and stabilizer-driven plate-out. In living hinges, repeated flexing may cause early whitening and fracture because the high MFR reduces molecular orientation stability relative to a low-flow homopolymer. Caps and closures for cold-chain distribution may require drop-impact validation at -20 °C, where neat PP H270 GP may fall below 1.5 kJ/m². Amine-based additives and some hindered amine light stabilizer combinations at excessive loading can interact with acid scavengers and shift discoloration behavior in regrind-rich systems. Storage should be in sealed original packaging away from UV and moisture at ambient conditions for no more than 12 months from the certificate of analysis date, after which melt-flow stability and yellowing should be verified before production use.
