| HS Code | 698177 |
| Density | 0.905 g/cm³ |
| Melt Flow Rate | 3.0 g/10min |
| Tensile Yield Strength | 35 MPa |
| Elongation At Break | 500% |
| Flexural Modulus | 1500 MPa |
| Notched Izod Impact Strength | 3.5 kJ/m² |
| Rockwell Hardness | R95 |
| Vicat Softening Point | 155 °C |
| Heat Deflection Temperature | 105 °C |
| Melting Point | 160 °C |
As an accredited Sinopec PP Homopolymer factory, we enforce strict quality protocols—every batch undergoes rigorous testing to ensure consistent efficacy and safety standards.
| Packing | 25 kg woven PP bags, moisture-proof, labeled with batch details, palletized and shrink-wrapped for safe handling and transport. |
| Container Loading (20′ FCL) | 20′ FCL of Sinopec PP Homopolymer, packed in 25kg woven bags on pallets, loaded securely and stowed for safe transport. |
| Shipping | Sinopec PP Homopolymer is shipped as non-hazardous resin pellets in 25 kg bags or jumbo bulk bags. Transport via dry containers, trucks, or rail under dry, ventilated conditions. Avoid moisture, direct sunlight, and heat sources. Keep packaging intact to prevent contamination; handle gently to preserve product quality. |
| Storage | Store Sinopec PP Homopolymer in a cool, dry, well-ventilated area, away from direct sunlight, heat sources, and open flames. Keep containers tightly sealed to prevent moisture pickup and contamination. Avoid dust accumulation and static discharge. No special temperature control is required, but store below 40°C. Use proper handling to prevent mechanical damage to packaging. |
| Shelf Life | Shelf life is typically 12 months from delivery when stored indoors in original, unopened packaging away from heat, moisture, and UV. |
Mineral-filled appliance structural parts use a Sinopec PP homopolymer pellet as the continuous phase, with talc or calcium carbonate masterbatch added at 20–40 wt%. A maleic anhydride-grafted PP coupling agent is dosed at 1.0–2.0 wt% to maintain interfacial adhesion, while an antioxidant/acid-scavenger masterbatch is added at 0.1–0.3 wt%. The compounding step should be executed on a co-rotating twin-screw extruder with an L/D of 40:1 or higher and hard-faced screw elements, because mineral filler raises screw torque and barrel wear; a side-feeder is used after the melt seal to limit filler attrition. Melt pressure measured before the die plate, typically 2.0–4.5 MPa, is a better indicator of filler dispersion than barrel temperature. Compliance is verified by IEC 60335-1 for household appliance safety, UL 94 HB burning tests, and ISO 178:2019 flexural modulus. Electrical and electronic finished goods must meet EU Directive 2011/65/EU restrictions on hazardous substances; the base PP homopolymer does not contribute restricted heavy metals, but flame-retardant masterbatches must be selected to avoid brominated diphenyl ether restrictions.
Injection molding of the compounded pellet is performed at melt temperatures of 220–245°C and mold temperatures of 25–60°C; the higher mold temperature is used for talc-filled grades to reduce flow-mark visibility on textured surfaces. The process boundary is the drop in weld-line strength under ISO 179-1 Charpy impact compared with unfilled resin, so gate locations should be moved off high-stress points. Melt temperature should not remain above 270°C for prolonged periods because thermo-oxidative degradation creates surface deposit on the cavity. Terminal product types include white-goods control-panel carriers, vacuum-cleaner motor shrouds, washing-machine pump housings, and refrigerator interior structural clips. Production-scale failure modes include screw-temperature override at high filler loadings and mold deposit from additive decomposition; both conditions require torque-based feeder controls and routine vent-port cleaning rather than increasing barrel temperature.
Biaxially oriented polypropylene film converts Sinopec PP homopolymer into a high-modulus web through strain-induced orientation. A film-grade homopolymer with an MFR of 2.0–3.5 g/10 min under ISO 1133-1:2022 is coextruded with PP copolymer skins; the core layer uses the homopolymer at 85–95 wt%, with the remainder occupied by skin layers and additive masterbatches. Skin-layer additive loadings are typically 0.05–0.15 wt% antiblock and 0.05–0.10 wt% slip erucamide; a nucleating masterbatch in the core can be used at 0.1–0.3 wt% to control haze and surface roughness. The cast web is quenched on a chill roll at 20–35°C to minimise spherulite size; faster quenching improves clarity but increases film brittleness during subsequent stretching. Drying of PP homopolymer is not generally required, but condensate from cold storage should be removed through a 70–80°C hopper dryer for 1–2 h when relative humidity exceeds 60%.
Sequential orientation is performed on a tenter frame: machine-direction orientation between rolls at 130–145°C with a draw ratio of 4.5–5.5:1, followed by transverse-direction stretching in a hot-air tenter at 160–170°C with a draw ratio of 7.0–10.0:1. Heat setting at 160–175°C relaxes internal stresses; post-treatment reduces thermal shrinkage to below 2–3% at 120°C when tested according to ISO 17555:2003. Film breaks and edge-bead instability are the main production-scale failure modes when transverse draw exceeds the orientation saturation point. Published data for specific Sinopec PP homopolymer film-grade draw-ratio curves is limited; converter trials are required to map neck-in and yield stress against line speed. Compliance for food contact is established under FDA 21 CFR 177.1520 and EU Regulation (EU) No 10/2011. Terminal product types include snack packaging webs, confectionery twist wrap, pressure-sensitive label face stock, and monolayer overwrap for boxed goods.
In slit-film tape extrusion from PP homopolymer, the dominant control variable is orientation oven residence time, not extruder output. Sinopec PP homopolymer with an MFR of 2.5–4.5 g/10 min under ISO 1133-1:2022 is extruded through a flat die at melt temperatures of 220–250°C, quenched in a water bath at 25–45°C, slit into tapes, and drawn in a hot-air oven at 110–140°C at a draw ratio of 1:6 to 1:8. The oriented tapes are then woven on circular looms at 600–850 picks/min; tape denier is controlled between 1,000 and 2,200 depending on sack strength class. Formulation addition ratios for outdoor and industrial woven sacks include a UV stabilizer masterbatch at 1.0–2.5 wt%, a pigment masterbatch at 1.0–3.0 wt%, and optionally a calcium carbonate masterbatch at 8–15 wt% to reduce fibrillation and improve weaving yield. Tensile strength of the final tape should be tested per ISO 527-3:2018; compliance for FIBC construction follows ISO 21898:2004 for safe working load and UV resistance, while direct food-contact sacks require validation under FDA 21 CFR 177.1520 and EU Regulation (EU) No 10/2011. If the water-bath temperature exceeds 45°C, tape-edge splitting and weaving breaks increase; this is the primary thermal boundary for slit-film tape lines. Terminal product types include cement bags, fertilizer sacks, polypropylene FIBCs, bulk container liners, and woven tarpaulins.
Spunbond nonwoven production from Sinopec PP homopolymer uses high-MFR resin, typically 25–35 g/10 min under ISO 1133-1:2022. The resin is melted in a single-screw extruder with L/D 30:1–35:1 at melt temperatures of 220–240°C, metered by a gear pump, and delivered to a spin beam with spinnerets capable of 3,000–6,000 holes/m. Quench air at 12–20°C is applied from both sides of the filament curtain; air velocity must be balanced to avoid filament fusion and web mottle. Filament drawing uses high-velocity air that accelerates the filaments to 2,000–3,500 m/min; above 3,000 m/min, thin filaments increase molecular orientation but the web edge segments tend to lose uniformity because aerodynamic drag concentrates at the center of the apron.
Formulation addition ratios for spunbond rollstock include a TiO₂ masterbatch at 0.5–2.0 wt% for opacity and an antioxidant/acid-scavenger masterbatch at 0.1–0.3 wt%; melt-blown layers require different resin rheology and are not part of a homopolymer spunbond grade comparison. Thermal calender bonding is performed at roll temperatures of 145–160°C with a nip pressure of 50–90 N/mm; below 140°C bond strength is insufficient, while above 165°C the polymer can stick and form holes. Compliance for nonwoven terminology is defined by ISO 9092:2019, and tensile properties are tested by ISO 9073-3; material safety for medical face mask outer layers is part of EN 14683:2019+AC:2019, but finished-mask certification is a converter responsibility. Terminal product types include hygiene topsheets, backsheets, surgical mask outer and inner layers, and industrial protective apparel substrate.
Thermoformed sheet from Sinopec PP homopolymer is extruded from low-MFR resin, typically 0.5–2.0 g/10 min under ISO 1133-1:2022, through a flat die onto a three-roll polishing stack with roll temperatures of 20–50°C. The sheet thickness is controlled between 0.3 and 2.0 mm; a nucleating agent concentrate is added at 0.1–0.3 wt% and a colour masterbatch at 1.0–4.0 wt%. Compliance is established under FDA 21 CFR 177.1520 and EU Regulation (EU) No 10/2011 when the sheet is intended for direct food contact. Plug-assisted vacuum forming is used for deep-draw cavities; the plug material and temperature, not extruder output, determine wall-thickness distribution in the formed part. The operational boundary for homopolymer PP is sag resistance: at draw ratios above 1.8:1, sheet heating uniformity must be maintained within ±3°C to avoid local draw marks. Terminal product types include drinking cups, food trays, biscuit inserts, and disposable plates.
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Sinopec PP Homopolymer is an isotactic propylene polymer produced by Sinopec’s catalytic polymerization assets. The resin is characterized by the absence of ethylene or butene-1 comonomer in the main chain; the regular isotactic sequence increases crystallinity and thermal resistance relative to random and impact copolymer grades. The commercial range is organized around processing families rather than a single property envelope. Grade designations encountered in distributor literature include PPH-T03 for woven tape and raffia extrusion, PPH-F03 for biaxially oriented polypropylene film, PPH-Y26 for spunbond nonwoven and staple fiber, and PPH-G series grades for injection molding. Density is reported at 0.89–0.91 g/cm³ according to ISO 1183-1:2019. Melt flow rate spans from 0.5 g/10 min to 100 g/10 min at 230°C/2.16 kg under ISO 1133-1:2022; raffia grades are typically 2.0–4.0 g/10 min, film grades 2.5–4.5 g/10 min, fiber grades 20–30 g/10 min, and injection molding grades 10–60 g/10 min. Pellet bulk density is commonly 0.52–0.56 g/cm³, and the resin is supplied with grade-specific antistatic, nucleating, slip, or antioxidant packages.
Quality-control parameters for homopolymer PP include xylene-soluble fraction, ash content, and isotacticity. Xylene-soluble fraction measured by ISO 16152:2005 is typically 2.0–4.0 wt% for reactor-grade homopolymer; controlled-rheology grades may show a tighter distribution but the same approximate range. Ash content in clarified film grades is normally below 0.03 wt%; higher residue from clarifier or antistat systems can accumulate on die lips and increase purge frequency. The melt peak measured by differential scanning calorimetry is commonly 160–165°C, with crystallization onset in the range of 110–125°C depending on nucleating package. These thermal values support hot-fill and sterilization exposure, but they do not justify continuous use above 100°C in load-bearing parts without creep evaluation.
Table 1. Typical property ranges for Sinopec PP homopolymer resin classes; these are compiled from standard polypropylene homopolymer guides and do not replace grade-specific datasheets.
| Property | Typical Range | Test Method |
|---|---|---|
| Melt flow rate | 0.5–100 g/10 min | ISO 1133-1:2022 |
| Density | 0.89–0.91 g/cm³ | ISO 1183-1:2019 |
| Tensile yield stress | 30–38 MPa | ISO 527-2 |
| Tensile yield strain | 8–12% | ISO 527-2 |
| Flexural modulus | 1,200–1,800 MPa | ISO 178 |
| Notched Izod impact at 23°C | 2.0–5.5 kJ/m² | ISO 180/1A |
| Heat deflection temperature at 0.45 MPa | 90–110°C | ISO 75-2/B |
| Vicat softening point A50 | 150–156°C | ISO 306/A50 |
| Elongation at break, unoriented | 100–500% | ISO 527-2 |
Random copolymer grades incorporate 1–8 wt% ethylene into the propylene backbone; impact copolymer grades are heterophasic reactor blends containing ethylene-propylene rubber domains. Homopolymer has no deliberate comonomer, so the crystalline lamellae are thicker and the isotactic index is higher—typically 94–97% for PPH-T03 according to xylene-insoluble measurements. The direct consequence is higher tensile yield stress and flexural modulus, but lower notched Izod impact at subambient temperatures. At 0°C, homopolymer notched Izod commonly falls below 2.0 kJ/m², whereas impact copolymer can remain above 8–15 kJ/m² depending on rubber content. Homopolymer also has a narrower optical window in quenched cast film because its higher crystallinity increases haze unless a clarifier is used.
Table 2. Comparative property positions across PP architectures; values are representative, not grade-specific.
| Property | Sinopec PP Homopolymer | Random Copolymer | Impact Copolymer |
|---|---|---|---|
| Comonomer content | 0 wt% | 1–8 wt% ethylene | 5–25 wt% ethylene-propylene rubber |
| Flexural modulus | 1,200–1,800 MPa | 800–1,200 MPa | 900–1,500 MPa |
| Notched Izod impact at 23°C | 2.0–5.5 kJ/m² | 4–10 kJ/m² | 10–25 kJ/m² |
| Heat deflection temperature B | 90–110°C | 70–90°C | 85–100°C |
| Xylene-soluble fraction | 2–4 wt% | 6–15 wt% | 10–30 wt% |
| Typical use | raffia, BOPP, fiber, injection molding | flexible film, medical packaging | crates, automotive, appliances |
Compared with HDPE, PP homopolymer has a density lower by about 0.04–0.06 g/cm³, higher heat deflection temperature, and lower environmental stress-crack resistance; compared with PET, PP homopolymer has lower oxygen barrier, lower processing temperature, and no hydrolytic drying requirement. These trade-offs are quantitative, not qualitative, and selection requires parallel testing against the specific end-use specification.
Additive selection modifies the base homopolymer. Nucleated grades shift crystallization onset upward by 5–8°C and permit cycle-time reductions in injection molding. However, excessive nucleation can create transcrystalline surface layers that reduce skin ductility. Antistat and slip packages used in BOPP film and nonwoven grades are formulated to bring surface resistivity below 10¹¹ Ω and coefficient of friction below 0.4 under ASTM D1894. Clarified homopolymer film can reach haze below 2% on 1 mm plaques, but the same clarified package may increase plate-out on chilled rolls. Published data for specific combinations of additives is limited; production trials are required to fix purge intervals and roll-cleaning schedules.
Biaxially oriented polypropylene film operations using PPH-F03 rely on controlled tenter temperatures. Extruder barrel settings from hopper to die are typically 200–240°C, cast roll temperature 25–35°C, and machine-direction orientation at 120–145°C. Transverse orientation is maintained at 145–170°C; below 140°C edge tearing occurs, while above 175°C secondary crystallization raises haze and thickness variation. The oriented film reaches tensile modulus above 2,000 MPa in the machine direction, but elongation at break falls below 80%. Corona treatment to surface energy above 38 mN/m is required for ink and cold-seal adhesion because the untreated homopolymer surface energy is approximately 29–31 mN/m.
Spunbond lines using PPH-Y26 typically specify a melt temperature of 230–250°C at the die and spinneret throughput of 0.6–1.2 g/hole/min. At these rates, high-shear viscosity at 1,000 s⁻¹ is approximately 40–80 Pa·s; lower viscosity improves filament drawdown but increases fiber diameter variability if melt temperature drifts by more than 5°C. Because homopolymer has lower melt elasticity than random copolymer, draw resonance and web sag are reduced, but the narrower processing window requires tighter quench-air control. Quench air below 15°C increases skin crystallinity too rapidly and reduces web tear strength; air above 25°C delays solidification and produces shot or fused filaments. For colored spunbond, a compatible PP carrier masterbatch is blended at 2–5 wt%; incompatible pigment concentrates can shift the MFR by more than 10% and create spinneret pressure buildup.
Injection molding grades such as the PPH-G series are processed at melt temperatures of 200–250°C and mold temperatures of 20–60°C. The high crystalline nucleation rate permits shorter holding-pressure time; however, mold shrinkage reported under ISO 294-4 is 1.0–2.0% in flow direction and 0.8–1.8% transverse, with anisotropy of 0.1–0.3 percentage points. For wall sections above 3 mm, packing pressure should remain above 40 MPa to avoid internal void formation. Living-hinge parts at hinge thickness 0.25–0.50 mm can withstand repeated flexing, but notched Izod impact data do not predict hinge performance; the relevant property is flexural fatigue resistance. For subzero service, impact copolymer or thermoplastic olefin replacement is required.
Woven tape and raffia lines using PPH-T03 are commonly configured with single-screw extruders of 90 mm diameter and 30:1 L/D, barrier screws, gear pump, and flat or annular die. Melt temperature measured at the die is held between 220°C and 250°C. The extruded film enters a water bath at 25–40°C; bath temperature below 20°C increases quench depth and reduces drawability. Orientation ovens are set to 100–145°C with draw ratios of 5:1 to 8:1. At these draw ratios, tape tensile strength increases from approximately 30 MPa to above 300 MPa in the oriented direction, while transverse strength declines sharply. Published data for this specific configuration is limited, and line trials are required to fix exact temperatures because thermocouple placement and line speed affect heat transfer.
Regulatory status is grade-specific. Homopolymer PP intended for food contact can be formulated to comply with FDA 21 CFR 177.1520, EU Regulation (EU) No 10/2011, and GB 4806.6-2016. RoHS compliance is typically declared against EU Directive 2011/65/EU for lead, mercury, cadmium, hexavalent chromium, PBBs, and PBDEs. REACH registration is managed by the manufacturer. End users must verify lot-specific certificates, because additive packages and catalyst residues vary by production site and grade.
Storage should be in dry, ventilated conditions. Equilibrium moisture uptake of polypropylene homopolymer is approximately 0.05 wt% at 23°C/50% RH. For BOPP, spunbond, and high-speed extrusion, moisture above 0.10 wt% is associated with melt-line bubbles and filament breaks; desiccant drying at 80–90°C for 2–4 h is used when regrind exceeds 20 wt% or ambient relative humidity exceeds 60%. The resin should not be processed at melt temperatures above 280°C due to chain scission, viscosity loss, and potential odor generation. Prolonged outdoor exposure requires UV stabilization with hindered amine light stabilizers or carbon black; unstabilized or inadequately stabilized homopolymer PP embrittles under UV-B exposure. Avoid prolonged contact with strong oxidizing acids, chlorinated solvents, and aromatic hydrocarbons, which can soften or swell the surface.
