| HS Code | 991970 |
| Melt Flow Rate 230 C 2 16 Kg | 12 g/10 min |
| Density | 0.905 g/cm3 |
| Tensile Stress At Yield | 35 MPa |
| Tensile Elongation At Yield | 12% |
| Flexural Modulus | 1450 MPa |
| Charpy Impact Strength Notched 23 C | 4 kJ/m2 |
| Heat Deflection Temperature 0 45 Mpa | 105 °C |
| Vicat Softening Point A50 50 N | 155 °C |
| Rockwell Hardness R Scale | 105 |
| Melting Point | 165 °C |
As an accredited SIBUR PP Homopolymer PP H120 GP factory, we enforce strict quality protocols—every batch undergoes rigorous testing to ensure consistent efficacy and safety standards.
| Packing | SIBUR PP Homopolymer PP H120 GP is supplied in 25 kg polyethylene-lined paper bags, palletized and shrink-wrapped for safe transport. |
| Container Loading (20′ FCL) | 20′ FCL: 25 kg woven bags, palletized, approximately 20 metric tons per container, safe and dry. |
| Shipping | SIBUR PP Homopolymer PP H120 GP ships as non-hazardous polypropylene pellets in sealed 25 kg bags on palletized shrink-wrapped loads. Store away from heat, ignition sources, and direct sunlight. Keep dry to prevent moisture absorption. Use covered trucks or containers; handle gently to avoid bag damage. |
| Storage | Store SIBUR PP Homopolymer PP H120 GP in a cool, dry, well-ventilated area, away from direct sunlight, heat, open flames, and ignition sources. Keep packaging sealed to prevent moisture pickup and contamination. Avoid prolonged UV exposure and static accumulation. No special hazardous storage required. Maintain good housekeeping and handle carefully to preserve product quality. |
| Shelf Life | Store in dry, cool, ventilated conditions, protected from sunlight and heat. Shelf life is 12 months from delivery. |
SIBUR PP Homopolymer PP H120 GP is an unfilled general-purpose polypropylene injection-moulding grade with nominal melt mass-flow rate of 12 g/10 min when measured in accordance with ISO 1133-1:2022 at 230°C and 2.16 kg. It is supplied as a reactor-grade homopolymer without ethylene comonomer, giving a stiffness-driven property envelope and predictable mould-filling behaviour in rigid injection-moulded articles. Density is routinely confirmed to ISO 1183-1:2019 at 0.900–0.910 g/cm³, while mould shrinkage is assessed on plaques according to ISO 294-4 rather than quoted as a single universal value because tool geometry and processing conditions shift shrinkage directionally. Tensile and flexural data are generated under ISO 527-1:2019 and ISO 178:2019 respectively; the current dated certificate of analysis should be used for lot-specific values because additive package and lot-to-lot MFR variation can move the processing window by several degrees or bar. The downstream application scope is limited to the following real sectors: thin-wall food packaging, still-beverage closures, opaque housewares and industrial containers, laboratory disposables, non-load-bearing appliance components, and toy/sports accessories.
| Application class | Principal standards | Numerical requirement | Standard reference |
|---|---|---|---|
| Thin-wall food packaging | EU food contact | Overall migration ≤10 mg/dm² | EU 10/2011 |
| Still beverage closures | US food contact | Extractives per olefin polymer | 21 CFR 177.1520 |
| Laboratory disposables | Plastic packaging and biocompatibility | Cytotoxicity / plastic packaging | ISO 10993-1:2018, USP <661.1> |
| Appliance trims | RoHS | Annex II limits | 2011/65/EU |
| Toys and sports accessories | Toy safety | Element migration limits | EN 71-3:2019+A1:2021 |
The limiting variable in multi-cavity thin-wall dairy tooling is not melt temperature alone but the interaction between flow-length-to-wall-thickness ratio and screw recovery under accumulator-assisted injection. H120 GP is dosed at 96–98 wt% in thin-wall formulations; the balance is 2–4 wt% PP-based white masterbatch containing 50–70 wt% titanium dioxide and 0.05–0.15 wt% acid scavenger/processing stabiliser. The addition ratio must be controlled by gravimetric dosing rather than volumetric screws because titanium dioxide masterbatch segregation above 4 wt% raises melt viscosity and can shift the short-shot threshold in cavities with fill length beyond 180 mm at 0.5 mm wall stock. EU compliance is anchored to Regulation (EU) No 10/2011, including overall migration no greater than 10 mg/dm² under the intended dairy or fatty-food simulants, and Regulation (EC) No 2023/2006 on good manufacturing practice; for US-sold articles, 21 CFR 177.1520(c) applies as the olefin polymer food-contact clearance, with extraction limits verified on finished articles rather than on resin alone. The downstream production route is high-speed injection moulding with 16–48-cavity hot-runner tools, melt temperature 220–240°C, mould temperature 10–30°C, injection velocity 120–200 mm/s, and hydraulic pressure switchover at 60–80% of peak cavity pressure. Cooling time for a 0.5 mm sidewall is held to 3–5 s; demoulding below 30°C surface temperature reduces sink but increases ejection force and may require air-assisted ejection on low-draft sidewalls. The processing window is narrow: below 215°C melt temperature the flow front freezes in thin sections and cavity pressure drops below 300 bar; above 245°C, odour, yellowing and screw deposit increase in unfilled PP under extended residence time. Terminal articles include dairy cups, margarine tubs, deli containers and thin-wall storage bowls at sidewall thickness 0.35–0.6 mm. The grade should not be specified for freezer-to-microwave reuse where impact below −10°C is required; homopolymer PP exhibits a ductile-to-brittle transition above 0°C, and published data for this specific frozen-use configuration is limited.
A 28 mm PCO 1881 still-water closure injection-moulded from H120 GP at 94–96 wt% is evaluated by removal torque, seal integrity under internal pressure, and organoleptic migration rather than by tensile strength alone. The remaining formulation is 2–3 wt% erucamide/anti-block masterbatch, 0.03–0.08 wt% primary antioxidant, 0.05–0.10 wt% secondary antioxidant, and 0.05–0.20 wt% nucleating or clarifier additive when cycle-time reduction or improved stiffness is required. Slip-agent loading is a process threshold: below 600 ppm erucamide, removal torque in 28 mm closures can exceed 1.5 N·m after 24 h polymer aging; above 1500 ppm, surface bloom may deposit on neck finishes and exceed sensory/taint limits under EU 10/2011 organoleptic evaluation. Regulatory compliance for the EU market uses EU Regulation (EU) No 10/2011 with food-contact simulant migration testing, FDA 21 CFR 177.1520 for US applications, and EC 2023/2006 GMP. Closures sold for carbonated beverages are outside the reliable operating window because homopolymer PP creep under headspace pressure above 2.0 bar may produce sealing loss over shelf life. Downstream production is injection moulding with hot-runner two-plate tools, reverse-taper stripper plate or collapsible core demoulding, melt 220–250°C, mould 15–40°C, and cycle time 4–8 s depending on cap weight and thread profile. Hot runner valve gating is preferred over cold sprue because automatic unscrewing tools amplify gate vestige variation above 0.05 mm, which alters sealing contact radius. Terminal products are 28 mm PCO 1881 still-water caps, 30/25 mm mineral-water caps, 38 mm condiment lids, and non-carbonated beverage closures with tamper-evident bands. Finished-cap torque should be tested on production runs with a cap torque tester calibrated to ISO/IEC 17025.
For opaque storage boxes, industrial pails and stackable crates, H120 GP is processed at 200–230°C melt temperature and 20–50°C mould temperature, with injection pressure 60–90 MPa in machines from 300–600 t clamp force. The addition ratio is 90–100 wt% H120 GP, with 0–10 wt% clean in-house regrind from the same production lot when the application is non-food; colour masterbatch is added at 2–4 wt%. Where low-temperature impact below −5°C is specified, 5–10 wt% PP impact copolymer or 3–6 wt% metallocene elastomer is compounded to suppress brittle fracture at stack corners and rim sections. Compliance for general housewares in the EU relies on REACH Regulation (EC) 1907/2006, particularly Annex XVII restrictions on lead, cadmium and polycyclic aromatic hydrocarbons; for food-contact storage boxes, EU 10/2011 and FDA 21 CFR 177.1520 apply. RoHS 2011/65/EU is not triggered unless the container incorporates a non-detachable electrical component. The production route is conventional cold-runner injection moulding with a shut-off nozzle and open sprue; because PP homopolymer has lower melt strength than high-viscosity grades, thick sections above 3 mm require holding pressure at 50–60% of peak for 6–12 s to prevent sink marks and internal voids. Terminal products include opaque storage boxes, industrial pails, stackable crates, dustbins and transport containers with wall thickness 1.5–4.0 mm. The grade should not be used for pressure-bearing containers above 50 kPa without finite-element validation.
Where non-orientated PP is processed into single-use laboratory consumables, H120 GP is used at 100 wt% neat or with 2–3 wt% non-leachable masterbatch that meets USP <661.1> plastic packaging requirements and the cytotoxicity criteria of ISO 10993-1:2018 when the article is declared as a medical device component. The application is restricted to non-implant, non-parenteral laboratory ware; final cleaning, pyrogen and sterility validation remain with the moulder, and published data for this specific configuration is limited because autoclave aging depends on wall thickness, mould stress, and load configuration. The downstream process is injection moulding with melt 210–240°C, mould 30–60°C, often in ISO 14644-1 Class 8 cleanroom conditions, with vacuum pre-drying not required below 60% RH but recommended at 80°C for 2–4 h if surface moisture remains above 0.05 wt%. Injection speed is set at 30–80 mm/s to reduce shear heating and visible gate blush; sharp corners are radiused above 0.5 mm because homopolymer PP is notch-sensitive. Terminal products include specimen transport cups, test-tube racks, centrifuge tube racks, microtitre plate holders and diagnostic accessory housings. Gamma sterilization at 25–50 kGy may oxidise the surface and increase yellowing; ethylene oxide is generally less aggressive but requires degassing validation. Autoclaving at 121°C for 20 min is possible for unstressed parts but can distort flat thin lids; repeated cycles may nucleate post-crystallisation and increase shrinkage by several tenths of a percent.
In replacement of talc-filled PP in non-load-bearing appliance trims, H120 GP is formulated at 80–95 wt%, 5–20 wt% fine talc masterbatch or 0–10 wt% calcium carbonate masterbatch only if stiffness and dimensional stability exceed the unfilled grade capability; 1–2 wt% PP-g-MAH coupling agent is added only when talc loading exceeds 10 wt% because filler dispersion in a 12 g/10 min homopolymer matrix otherwise reduces tensile elongation at break and increases gate-area brittleness. Compliance for electrical and electronic equipment within the scope of RoHS Directive 2011/65/EU requires Annex II substance limits to be verified on the finished component, while insulation and material aging are assessed according to UL 746B relative thermal index and IEC 60335-1:2020 for household appliance safety. The downstream route is injection moulding with melt 210–250°C, mould 30–60°C, and injection pressure 50–90 MPa; components are often assembled by ultrasonic welding, snap-fits or screws, but solvent bonding is not applicable to polypropylene. Terminal products are appliance knobs, control-panel housings, washing-machine detergent drawer fronts, vacuum-cleaner wheel caps, and air conditioner louvre ends. The grade is not suitable for load-bearing structural elements or for surfaces requiring paint adhesion without flame, plasma or corona pre-treatment.
During multi-cavity injection of toy components and hobby/sports accessories, H120 GP is typically formulated at 94–98 wt% with 2–4 wt% pigment masterbatch, 0.05–0.20 wt% antistatic agent, and 0.05–0.15 wt% processing stabilizer. The relevant compliance burden is EN 71-3:2019+A1:2021 for migration of aluminium, antimony, arsenic, barium, boron, cadmium, cobalt, copper, lead, manganese, mercury, nickel, selenium, strontium and zinc from toy materials, together with the Toy Safety Directive 2009/48/EC and REACH Regulation (EC) 1907/2006 Annex XVII. Phthalate plasticisers and BPA are not required and should not be present in the formulation. Processing is conventional injection moulding with 16–48-cavity tools, melt 200–240°C, mould 20–50°C, ejection air assist and release angle above 0.5–1.0°; pad printing or hot-foil decoration requires surface energy above 38 mN/m, achieved by corona or plasma pre-treatment. Terminal articles include toy building blocks, model vehicle wheels, board-game pieces, sand moulds, and sports accessories such as rigid cones and marking discs. The property boundary is low-temperature impact: toy parts likely to be used below 5°C or subjected to repeated flexure should be switched to a PP impact copolymer, because homopolymer notch sensitivity may produce brittle failure at wall thickness below 1.0 mm.
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SIBUR PP Homopolymer PP H120 GP is a general-purpose injection molding grade based on isotactic polypropylene homopolymer. The grade designation identifies the melt flow class: the nominal melt mass-flow rate is 12 g/10 min when measured at 230 °C under a 2.16 kg piston load in accordance with ISO 1133-1:2022. The “H” designates a homopolymer, “120” indicates the melt flow rate class, and “GP” denotes general-purpose injection molding. In the SIBUR portfolio, PP H120 GP occupies an intermediate-flow position between low-flow grades such as H030 GP and high-flow grades such as H250 GP. Because the resin contains no ethylene comonomer, the crystallization rate is rapid and the crystalline mass fraction is higher than that of random copolymers with the same melt flow rate. Representative property data include a density of 0.90–0.91 g/cm³ under ISO 1183-1, a tensile yield stress of approximately 34 MPa under ISO 527-2, a flexural modulus of 1400–1500 MPa under ISO 178, and a notched Charpy impact strength of 2.0–3.0 kJ/m² at 23 °C under ISO 179-1/1eA.
The melt rheology of this MFI class is shear-thinning and process-relevant. At 230 °C and zero shear, the viscosity of a 12 g/10 min polypropylene homopolymer typically lies in the range of 800–1200 Pa·s, but under injection molding shear rates above 1000 s−1 the apparent viscosity falls below 100 Pa·s, allowing thin-wall filling. The recommended melt temperature range on conventional injection molding machines is 220–250 °C. The lower bound is limited by weld-line embrittlement and the formation of surface flow marks in thin sections, while the upper bound is limited by thermo-oxidative degradation of the stabilizer package and by yellowing after extended barrel residence. Mold temperatures of 20–50 °C are typical; raising the mold temperature to 60 °C can improve surface reproduction but increases cycle time and may increase anisotropic shrinkage.
Virgin H120 GP does not normally require pre-drying when packaging is intact and ambient relative humidity is below 60%. If pellets have been exposed to humid air for more than 48 h or if high regrind fractions are used, drying at 80 °C for 2–4 h with a desiccant dryer is recommended to prevent surface splay.
The processing window for H120 GP is constrained by the interaction between molecular weight, melt viscosity, and crystallization rate. With a nominal melt flow rate of 12 g/10 min, the grade provides higher melt strength and less tendency to flash in worn molds than high-flow grades, but it also requires higher injection pressure for long flow paths. Published spiral flow data for similar homopolymers of this MFI class range from 700–900 mm at 1 mm wall thickness and 80 MPa injection pressure; published data for SIBUR PP H120 GP in this specific configuration is limited, so mold-filling simulation should be calibrated with lot-specific viscosity data.
On hydraulic injection molding machines with screw diameters of 25–35 mm and L/D 20–25, plastication settings should keep melt residence time below 5 min at 230 °C. In hot-runner systems, stagnation zones at the manifold can produce brown gel-like specks; hot-runner temperature should not exceed 250 °C, and gate geometry should be sized to avoid excessive shear heating. The non-isothermal crystallization peak temperature of comparable homopolymers measured by DSC at 10 K/min is typically 115–120 °C; because solidification occurs rapidly after the filling stage, hold pressure must be applied before the gate freezes. For thin-wall containers of 1.0 mm wall thickness, core melt temperatures of 220–240 °C and injection pressures of 80–120 MPa are usually required to prevent short shots. Mould shrinkage under ISO 294-4 is approximately 1.0–1.5% in the flow direction and 0.8–1.2% transverse to flow.
For mold-filling simulation, the viscosity curve should be fitted with a Carreau-Yasuda model rather than a simple power-law model because the melt passes through both Newtonian and shear-thinning regions in the runner and gate. Typical model parameters for a 12 g/10 min polypropylene homopolymer at 230 °C are a zero-shear viscosity of 800–1200 Pa·s, a transition shear rate near 100–300 s−1, and a power-law index of 0.35–0.45. SIBUR lot-specific data should be obtained for critical applications, since viscoelastic parameters depend on molecular weight distribution and can vary between production campaigns.
Differential shrinkage between thick and thin sections causes warpage in semi-crystalline homopolymers. In H120 GP, the combination of high crystallinity and absence of ethylene comonomer increases shrinkage anisotropy compared with random copolymers. Mold designers should allow for gate location, wall-thickness transitions, and cooling-line placement to avoid sink marks and bowing. For a flat part with 2 mm wall thickness, differential shrinkage from flow to transverse direction of 0.2–0.5% is sufficient to produce visible warpage if the part is not constrained during ejection and post-mold cooling.
Specifications for H120 GP are reported against standard test methods. A representative certificate-of-analysis profile is summarized in Table 1. The values are class-typical and should not be used as release limits; the lot certificate of analysis remains controlling because additive package, molecular weight distribution, and lot-to-lot variation can shift mechanical values within the allowed specification band.
| Property | Representative value | Test method |
|---|---|---|
| Melt mass-flow rate, 230 °C, 2.16 kg | 12 g/10 min | ISO 1133-1:2022 |
| Density | 0.90–0.91 g/cm³ | ISO 1183-1 |
| Tensile stress at yield | 34 MPa | ISO 527-2 |
| Tensile strain at yield | 8–10% | ISO 527-2 |
| Flexural modulus | 1400–1500 MPa | ISO 178 |
| Notched Charpy impact strength, 23 °C | 2.0–3.0 kJ/m² | ISO 179-1/1eA |
| Vicat softening temperature, A50 | 152–155 °C | ISO 306 |
| Heat deflection temperature, B to 0.45 MPa | 90–100 °C | ISO 75-2/B |
| Mould shrinkage, flow direction | 1.0–1.5% | ISO 294-4 |
The most significant difference between PP H120 GP and polypropylene random copolymers of similar melt flow rate is the inverse relationship between stiffness and impact resistance. Because the homopolymer contains no ethylene comonomer, it forms thicker lamellae and a higher volume fraction of α-phase crystals. Under ISO 527-2, a comparable random copolymer typically displays a tensile yield stress 3–6 MPa lower and a flexural modulus 300–500 MPa lower than H120 GP. The same structural feature reduces the energy dissipated by crazing before brittle failure; therefore, notched Charpy impact strength at 23 °C for H120 GP is approximately 2.0–3.0 kJ/m², whereas random copolymers often fall in the 5–8 kJ/m² range and impact copolymers in the 10–20 kJ/m² range.
Compared with higher-flow homopolymer grades such as SIBUR PP H250 GP, H120 GP has a lower melt flow rate and higher average molecular weight. This increases melt strength and reduces flash tendency, but it also raises injection pressure demand for very thin walls below 0.5 mm. For high-speed molding of extremely thin-wall containers, H250 GP or controlled-rheology grades are usually preferred. Conversely, compared with lower-flow homopolymer grades such as H030 GP, H120 GP offers shorter plastication time and lower filling pressure for multi-cavity molds, but less melt strength for applications requiring deep draw or heavy-wall extrusion. The homopolymer is also not suitable for transparent articles where haze below 20% is required; random copolymers are selected for those applications.
Within the SIBUR homopolymer range, the main differences are driven by melt flow rate. Lower-flow H030 GP is typically selected for heavy-wall sheet, thick-walled parts, or applications requiring higher melt strength, whereas H080 GP is a mid-flow compromise. H120 GP is positioned for balanced thin-wall filling and fast crystallization in general-purpose injection molding. Higher-flow H250 GP or H350 GP are intended for very thin-wall, long-flow, or multi-cavity high-speed molding. The choice between H120 GP and higher-flow homopolymers is governed by the maximum injection pressure available on the molding machine, the wall thickness distribution, and the acceptable impact performance after molecular weight reduction. Higher-flow grades normally exhibit slightly lower tensile yield stress and lower notched impact strength because higher MFR is generally achieved by reducing molecular weight.
| Property | PP H120 GP homopolymer | Random copolymer | Impact copolymer | Test method |
|---|---|---|---|---|
| Tensile stress at yield | 34 MPa | 28–30 MPa | 25–28 MPa | ISO 527-2 |
| Flexural modulus | 1400–1500 MPa | 1000–1200 MPa | 1100–1300 MPa | ISO 178 |
| Notched Charpy impact strength, 23 °C | 2.0–3.0 kJ/m² | 5–8 kJ/m² | 10–20 kJ/m² | ISO 179-1/1eA |
| Density | 0.90–0.91 g/cm³ | 0.90–0.91 g/cm³ | 0.90–0.91 g/cm³ | ISO 1183-1 |
Injection molding applications for SIBUR PP H120 GP are concentrated in non-clarified rigid packaging, caps and closures, housewares, containers for dry goods, and technical articles. In thin-wall rectangular containers with 1.0 mm wall thickness, mold filling is normally achieved at injection pressures of 80–120 MPa and melt temperatures of 220–240 °C. For caps and closures, the homopolymer’s higher flexural modulus contributes to strip-torque retention in tamper-evident bands; however, the low notched impact toughness and high craze sensitivity can lead to stress cracking under aggressive demolding forces, high crystallinity, or contact with surfactants and solvent-based formulations. The grade is therefore selected for closures in dry or mildly aqueous service rather than for packaging of solvent-based or aggressive liquid products.
Regulatory status must be confirmed for the specific lot and application because food-contact approval depends on the additive package and conversion conditions. The polypropylene homopolymer base resin is generally covered by EU Regulation 10/2011 as an authorized monomer; however, the final article must satisfy overall migration limits of 10 mg/dm² or 60 mg/kg in the prescribed food simulant. For industrial applications, REACH registration applies to the polypropylene substance, but article-level SVHC restrictions depend on the final formulation. No general statement of RoHS compliance can be made without reviewing the pigment masterbatch and additive package.
During processing, the melt should not be overheated above 280 °C for more than 5 min because the stabilizer package is not formulated for extended high-temperature exposure. When H120 GP regrind is reprocessed on a twin-screw extruder with L/D 32–40, specific mechanical energy should be kept below 0.25 kWh/kg to limit chain scission and to avoid an uncontrolled shift in melt flow rate. Published data for this specific configuration is limited; therefore, melt flow rate should be rechecked after multiple regrind cycles. Storage life for polypropylene homopolymers is typically 24 months from production in sealed packaging at ambient temperature. Prolonged storage above 40 °C may accelerate additive depletion; therefore, inventory should be consumed on a first-in, first-out basis.
