| HS Code | 752002 |
| Density | 0.905 g/cm³ |
| Melt Flow Rate | 3.0 g/10 min (230°C/2.16 kg) |
| Melting Peak Temperature | 165 °C |
| Tensile Stress At Yield | 35 MPa |
| Elongation At Yield | 11% |
| Flexural Modulus | 1500 MPa |
| Charpy Impact Strength 23 C Notched | 3.5 kJ/m² |
| Rockwell Hardness | R100 |
| Heat Deflection Temperature 0 45 Mpa | 100 °C |
| Vicat Softening Temperature A50 | 155 °C |
| Volume Resistivity | 1×10^15 ohm·cm |
| Water Absorption 24h | ≤0.01% |
As an accredited Jinneng Chemical PP Homopolymer factory, we enforce strict quality protocols—every batch undergoes rigorous testing to ensure consistent efficacy and safety standards.
| Packing | Jinneng Chemical PP Homopolymer is packaged in 25 kg woven bags, containing polypropylene pellets for processing. |
| Container Loading (20′ FCL) | 20′ FCL container loading of Jinneng Chemical PP Homopolymer, secured and weight-balanced for safe, efficient transport. |
| Shipping | Jinneng Chemical PP Homopolymer ships as virgin resin in 25 kg woven bags, bulk bags, or rail/sea containers. Protect from moisture, direct heat, and contamination during transit. Store in dry, ventilated areas and handle with clean equipment to preserve product integrity and processing performance. |
| Storage | Store Jinneng Chemical PP Homopolymer in a cool, dry, well-ventilated area away from direct sunlight, heat sources, and open flames. Keep bags sealed and on pallets to prevent moisture contamination. Avoid contact with strong oxidizing agents. Maintain good housekeeping to prevent dust accumulation and ensure safe, stable storage conditions. |
| Shelf Life | Shelf life is typically 12 months when stored properly in a cool, dry, ventilated area away from sunlight and moisture. |
On sequential biaxially oriented polypropylene lines, the core layer of a three-layer cast film is frequently extruded from Jinneng Chemical PP homopolymer with a melt mass-flow rate of 3.0–3.5 g/10 min under 2.16 kg at 230°C tested to ISO 1133-1:2022. A narrow-polydispersity homopolymer is selected rather than a random copolymer because ethylene sequences in the stretched film generate haze at total orientation ratios above 35:1. Direct food-contact compliance is governed by EU 10/2011 with an overall migration limit of 10 mg/dm², and by 21 CFR 177.1520(c) for olefin polymers under the intended conditions of use; downstream converters also require REACH SVHC clearance and heavy-metals screening aligned with RoHS 2011/65/EU where export packaging enters electrical and electronics supply chains.
Formulation addition ratios are asymmetric between core and skin layers. The core layer runs at 100 parts homopolymer. Skin layers receive 1.5–3.0 wt% of a silica-based antiblock masterbatch containing 5–10 wt% synthetic amorphous SiO₂, 0.08–0.25 wt% erucamide slip additive, and 0.5–1.5 wt% of a hydrocarbon or ester-based antistat masterbatch where static discharge on high-speed bag form-fill-seal lines is critical. Addition ratios are calculated on total skin-layer compound, not total film weight, because migration of slip additives into the core is limited by polypropylene solubility and layer thickness.
Downstream production uses tenter-frame BOPP with a 2.0–2.5 m cast die at melt temperature 235–250°C, electrostatic pinning, and a chill roll held at 20–35°C to produce a cast sheet of 200–350 µm. Machine-direction orientation occurs at 130–145°C with a draw ratio of 4.5–5.5:1, followed by transverse-direction orientation in a tenter oven at 155–175°C at 7–9:1. Annealing at 160–175°C lowers \(5 min\) shrinkage at 130°C below 4% when measured to ASTM D1204. Final film thickness is 15–40 µm; haze measured to ASTM D1003 remains below 2% for unprinted homopolymer skin films.
Terminal finished product types include heat-sealable overwrap for confectionery and tobacco cartons when a terpolymer seal layer is coextruded, cold-seal release films, adhesive tape base film, and high-transparency direct food packaging for bakery, dry goods, and textile overwrap.
Commercial raffia tape production from Jinneng Chemical PP homopolymer typically specifies an MFI of 3.0–4.0 g/10 min to ISO 1133-1:2022 at 230°C/2.16 kg and a controlled water-quench cast-film step to generate a fine spherulitic structure before solid-state drawing. Industrial woven sack compliance is governed by REACH, and food-contact bulk bags are assessed under EU 10/2011; tensile acceptance testing is performed to ISO 527-3:2018 on slit tape, while UV aging resistance is screened by ISO 4892-2 with elongation retention thresholds set by the end user, generally above 50% after 200–400 h xenon arc exposure depending on geographic storage conditions.
Formulation addition ratios are 100 parts homopolymer, 3–10 wt% calcium carbonate masterbatch for opacity and fabric stiffness, 2–4 wt% UV masterbatch for outdoor exposure, and 1–3 wt% color masterbatch. Low-filler formulations dropping CaCO₃ below 1 wt% are used where high weld strength and elongation are more important than opacity. UV masterbatch loading shifts to 4–6 wt% for flexible intermediate bulk containers stored outdoors for more than 2,000 h in high-ultraviolet climates.
Downstream production uses a single-screw extruder with 30:1 L/D, melt temperature 220–250°C, a flat cast die, and water-bath cooling at 25–40°C. Slit tapes then pass through a hot-air orientation oven at 130–160°C with a draw ratio of 6–8:1 and are annealed on rollers at 110–130°C before weaving on circular or flat looms with 8–12 tapes per inch in both directions. Over-stretching above 8:1 without sufficient quench cooling produces fibrillation and reduces elongation at break below 15%, which creates splice breaks on high-speed conversion lines.
Terminal finished product types include laminated and unlaminated woven polypropylene sacks, flexible intermediate bulk containers with load-bearing seams, carpet backing, synthetic turf secondary backing, and laminated tarpaulins for construction and agricultural service.
High-flow Jinneng Chemical PP homopolymer grades in the 25–45 g/10 min MFI range to ISO 1133-1 at 230°C/2.16 kg are specified on thin-wall packaging lines to keep peak injection pressure below 1,600 bar when filling wall sections of 0.35–1.20 mm. Direct food-contact compliance is governed by 21 CFR 177.1520(c) and EU 10/2011 with an overall migration limit of 10 mg/dm². Mechanical integrity after hot-fill simulation is tested to ISO 527-2, and heat deflection temperature is measured to ASTM D648 for closures exposed to warm filling lines.
Formulation addition ratios comprise 100 parts homopolymer, nucleating agent masterbatch at 0.05–0.20 wt% active content, slip or antistat masterbatch at 0.05–0.30 wt% for cap release torque control, and custom color masterbatch at 1–2 wt%. Increasing nucleating agent above 0.25 wt% can reduce puncture impact energy measured to ISO 6603-1 and create brittle fractures on tamper-evident bands during high-speed capping.
Downstream production uses hydraulic or all-electric injection molding machines with shot size maintained at 30–70% of barrel capacity, melt temperature 220–260°C, mold temperature 10–30°C, and holding pressure 600–1,200 bar for 0.5–2.0 s. A 0.6 mm wall dairy tub runs a cycle time of 3.0–6.5 s on 350–500 t clamp machines. Shrinkage after 48 h is typically 1.0–2.5% measured to ISO 294-4; warpage is controlled by balanced gating and nucleated crystallization.
Terminal finished product types include thin-wall dairy cups for yogurt and cottage cheese, delicatessen containers with snap-on lids, tamper-evident beverage closures, and disposable medical trays when the final converter validates ethylene oxide or electron-beam sterilization and ISO 10993-5 cytotoxicity on the finished device.
Spunbond nonwoven conversion of a Jinneng Chemical PP homopolymer with an MFI of 25–40 g/10 min to ISO 1133-1 at 230°C/2.16 kg is performed on single-screw extruders with 30:1 L/D and spinneret capillary diameters of 0.3–0.6 mm. For medical end uses, final fabric is validated to EN 13795:2019 for surgical drapes and gowns and to ISO 10993-5 and ISO 10993-10 for cytotoxicity and skin sensitization; physical property acceptance uses ISO 9073-2:2015 for breaking strength in machine and cross directions.
Formulation addition ratios are 100 parts homopolymer, 0.5–2.0 wt% color or TiO₂ masterbatch for opacity, 0.3–0.8 wt% hydrophilic melt additive masterbatch for hygiene topsheet wetting behavior, and 0.05–0.2 wt% melt stabilizer package to reduce viscosity drift during fiber residence times up to 20 min. Mineral fillers are excluded because they increase spin-pack pressure and filament breakage at spin draw ratios above 2.5:1.
Downstream production includes melt extrusion at 230–250°C, filtration through 40–60 µm sintered metal media, spin manifold delivery to spinnerets, high-velocity air attenuation, fiber laydown on a moving forming belt, and calender bonding with 15–25% bond area at 130–160°C and 30–90 N/mm nip pressure. Fabric basis weight ranges from 8–70 g/m²; the MD/CD tensile strength ratio is controlled between 1.0 and 2.0 through forming-belt speed and suction profile adjustments.
Terminal finished product types include nonwoven hygiene topsheet and backsheet laminates, surgical gown and drape fabrics, medical face mask outer layers, agricultural floating row covers, and geotextile filter fabrics when additional UV stabilizer is added at 3–5 wt%.
Controlled-rheology Jinneng Chemical PP homopolymer entering meltblown filter lines is processed at 800–1,500 g/10 min MFI to ISO 1133-1 at 230°C/2.16 kg after peroxide-initiated visbreaking of a lower-MFI homopolymer at 50–200 ppm organic peroxide. The processing window is critically narrow: die air temperature below 260°C produces shots and large fiber diameter, while above 310°C thermo-oxidative degradation increases volatile content and pressure instability. Filter media for respirators and medical face masks are validated downstream under ASTM F2100-21 for particulate filtration efficiency and differential pressure, EN 14683:2019+AC:2019 for medical face masks, and 42 CFR Part 84 for NIOSH respirator constructions; web physical properties are tested per ISO 9073-1 mass per unit area and ISO 9073-2 breaking strength.
Formulation addition ratios are intentionally lean: 100 parts visbroken homopolymer, 0.05–0.30 wt% processing stabilizer masterbatch, and 0.5–1.5 wt% electret charge-enhancing masterbatch added only after drying. Filler addition above 0.5 wt% is not used because mineral particles create fiber breaks at diameters below 5 µm and reduce filtration consistency.
Downstream production uses a meltblown extruder with 30:1–36:1 L/D and a coat-hanger die with 150–300 holes per 25 mm and hole diameters of 0.2–0.4 mm. Melt temperature is held at 240–280°C, die air temperature at 260–310°C, and die-to-collector distance at 100–250 mm; collector vacuum is adjusted to sustain fiber diameters of 1–10 µm and basis weights of 10–80 g/m². Web bonding is usually self-thermal or via a heated calender at 90–130°C. At throughput above 0.4 g/hole/min, fiber diameter distribution broadens beyond ±35% of the mean and shot defects become visible under 20× optical inspection, defining the practical throughput boundary for homopolymer grades without branching agents.
Terminal finished product types include high-efficiency particulate air filter layers for respiratory protection, coalescing filter media for industrial air and liquid filtration, oil sorbents, surgical mask inner filter layers, and cleanroom wipes when electrostatically charged to reduce particle shedding.
For monolayer polypropylene sheet used in plug-assist thermoforming of food trays and tubs, a low-MFI Jinneng Chemical PP homopolymer of 0.8–2.0 g/10 min to ISO 1133-1 at 230°C/2.16 kg is selected to maintain melt strength and sag resistance in the hot sheet. Food-contact compliance is assessed under 21 CFR 177.1520(c) and EU 10/2011 overall migration limit 10 mg/dm², with mechanical acceptance values obtained from ISO 527-2 tensile yield and ISO 178 flexural modulus.
Formulation addition ratios comprise 100 parts homopolymer, 0.05–0.20 wt% sodium benzoate nucleating agent, 0.1–0.25 wt% antistat, and 1–3 wt% white or custom masterbatch. For high-clarity sheet, nucleating agent is raised to 0.15–0.25 wt% while filler is omitted. Random copolymer tie layers are not added when monolayer sheet is specified, so edge trim can be reground directly into the sheet extruder without compatibilizer adjustment.
Downstream production uses a single-screw extruder with 30:1–34:1 L/D, melt pump, and flat die into a three-roll calendering stack at 20–70°C. Sheet thickness ranges from 0.3–2.5 mm. Thermoforming is performed on plug-assist machines with sheet temperature 155–170°C, plug assist temperature 100–130°C, and mold temperature 30–80°C; wall thinning below 35% of initial gauge is required to maintain drop resistance. Inline extrusion-thermoforming develops die lines when the lip gap is below 1.5 mm, producing thickness variation above ±5% measured to ISO 4593.
Terminal finished product types include shallow food trays, bakery tray inserts, fruit and vegetable punnets, electronic component trays, seed trays, and thin-gauge drinking cup bases where notch impact is not the limiting design criterion.
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Jinneng Chemical PP Homopolymer is a propylene homopolymer class supplied in multiple injection-moulding, extrusion, film, and fibre grades; the producer designates individual grades by melt mass-flow rate and additive package, classified as PP-H under ISO 19069-2:2016 and as PPH under common Chinese product nomenclature. The lot-specific grade code, such as those listed on the manufacturer certificate for injection or fibre conversion, carries the definitive stabiliser and nucleator formulation. Where an individual grade code is not reproduced, this document refers to the homopolymer family property envelope. Jinneng Chemical PP Homopolymer is used in rigid packaging, caps and closures, thin-wall containers, technical brackets, BOPP film, raffia tape, and spunbond nonwovens. It differs from random copolymers and impact copolymers by having no intentional ethylene or rubber phase; the effect is higher stiffness, higher heat deflection, lower low-temperature toughness, and higher brittleness near 0 °C. Published data for individual Jinneng grade codes is limited in this document; the supplier’s certificate of analysis and grade-specific technical datasheet must govern.
Melt mass-flow rate is determined according to ISO 1133-1:2022 or ASTM D1238 at 230 °C under 2.16 kg load; commercial homopolymer grades span 0.3–100 g/10 min, with injection-moulding grades generally 10–35 g/10 min and film or fibre grades commonly 2–4 g/10 min. Density measured by ISO 1183-1:2019 is 0.90–0.91 g/cm³. Tensile stress at yield under ISO 527-2:2012 or ASTM D638-14 at 50 mm/min is typically 30–38 MPa. Flexural modulus under ISO 178:2019 falls between 1200 MPa and 1700 MPa, while notched Izod impact at 23 °C under ISO 180/A is commonly 2–5 kJ/m². Heat deflection temperature at 0.45 MPa under ISO 75-2/B is 90–110 °C; Vicat softening point A50 is often 150–155 °C. The continuous dry-heat service limit for unmodified grades is generally near 100 °C. These ranges describe the homopolymer class, not a guaranteed lot value; production certificates control the actual specification.
On a reciprocating-screw injection moulding line with a 20:1 to 25:1 L/D barrier screw, Jinneng Chemical PP Homopolymer is processed at melt temperatures of 210–250 °C and mould temperatures of 20–50 °C for fast crystallisation. Elevated mould temperature, up to 80 °C, reduces post-mould shrinkage but increases cycle time. The isotactic crystalline morphology produces mould shrinkage of 1.0–2.2% parallel and 0.8–2.0% perpendicular, depending on wall thickness, gate dimensions, and nucleating additives. Shrinkage anisotropy in thin-wall packaging is a processing conflict: differential cooling across thickness creates residual stress that may cause warpage if holding pressure is released before gate freeze. Holding pressure is typically set at 50–70% of injection pressure, and gate seal time should be confirmed by short-shot weight plateau rather than timer alone. Back pressure between 0.5 MPa and 1.5 MPa is often used to stabilise screw motion and melt temperature. Nucleated grades raise crystallisation temperature and can reduce cycle time, but excessive nucleation may reduce impact resistance and produce weld-line weakness. The melt should not be held above 280 °C for extended residence time; oxidative chain scission reduces molecular weight and increases yellowing. Purging is recommended after contact with polystyrene or PVC residues to avoid incompatible material carryover.
Jinneng Chemical PP Homopolymer is used in caps and closures because its higher flexural modulus supports top-load strength and back-off stability at moderate temperature. Closure performance depends on seal integrity, torque retention, and stress-crack resistance after contact with fats, surfactants, and flavour oils. Homopolymer PP generally has lower environmental stress-crack resistance than random copolymer under detergent or oil contact; cap liners and sealing systems should be tested under ASTM D1693 or equivalent. Food-contact compliance is supported when the grade meets FDA 21 CFR 177.1520 and GB 4806.7-2016; specific migration limits remain additive-dependent. In hot-fill or carbonated beverage applications, the higher modulus of homopolymer supports dimensional stability at service temperatures up to 65–70 °C, but creep under closure back-off force becomes significant above this range. Differential scanning calorimetry under ISO 11357-3:2018 typically shows a melting peak at 160–166 °C; non-isothermal crystallisation onset is commonly 118–128 °C for many formulations, although nucleator type shifts this temperature. At ≤4 °C, closure impact flexibility is reduced; notched Izod values below 2 kJ/m² at 0 °C require design reevaluation. Published data for Jinneng grade-specific cap performance is limited; supplier design data should be used before tool commissioning.
In biaxially oriented polypropylene film extrusion, Jinneng Chemical PP Homopolymer film grades with MFR 2–4 g/10 min are extruded through cast or tubular processes and oriented in machine and transverse directions. A controlled-rheology grade with narrow molecular weight distribution improves gauge uniformity and reduces draw resonance above stretch ratios of 5:1 in machine direction and 8:1 to 10:1 in transverse direction. Peroxide-controlled rheology can, however, leave low-molecular-weight fractions that increase volatile organic compounds and influence organoleptic properties. Film-grade homopolymer usually contains slip and antiblock additives; erucamide-based slip migration is time- and temperature-dependent, with coefficient of friction stabilising after 24–72 h at 20–30 °C. In raffia tape lines, die temperature is commonly 240–260 °C, and water-bath quench at 20–40 °C controls post-stretch fibrillation. In spunbond nonwoven lines, low-viscosity homopolymer with MFR 25–35 g/10 min is processed at 220–250 °C through spinnerets; molecular weight and peroxide residues influence filament break rate and fabric tensile strength. Compared with random copolymer, homopolymer in BOPP provides higher stiffness and better moisture-barrier contribution but reduced seal initiation; it is therefore frequently coextruded with random copolymer skins for sealability.
Substitution of random copolymer with Jinneng Chemical PP Homopolymer is viable only when the application’s low-temperature impact demand is below the homopolymer brittle-ductile transition energy. At 0 °C, notched Izod impact of a typical non-nucleated homopolymer under ISO 180/A is commonly 1.5–3 kJ/m², while random copolymer may exceed 5 kJ/m²; at -20 °C, homopolymer frequently falls below 1 kJ/m² and is generally unsuitable for impact-dominated parts. Thin-wall transparent containers, hinged closures, and low-temperature packaging are therefore prefer random copolymer where clarity, hinge life, or impact strength is specified. Homopolymer provides higher flexural modulus, often 1400–1700 MPa, making it applicable for stackable crates, appliance brackets, and closures in which buckling resistance governs. For load-bearing static applications, short-term creep resistance is superior, but long-term creep at elevated temperature remains dependent on crystallinity and filler. A nucleated homopolymer with high crystallinity may exhibit higher heat deflection and top-load retention at 60 °C; however, warpage from differential shrinkage must be corrected with nucleating agent concentration and tool cooling. Clarified homopolymer grades containing sorbitol-based nucleators can achieve haze below 20% at 1 mm, but this additivation may reduce impact and increase plate-out on mould venting surfaces.
| Property | PP Homopolymer | PP Random Copolymer | PP Impact Copolymer |
|---|---|---|---|
| Comonomer content | 0–1 wt% ethylene | 1–7 wt% ethylene | 5–15 wt% ethylene/propylene rubber |
| Density, ISO 1183-1:2019 | 0.90–0.91 g/cm³ | 0.90–0.91 g/cm³ | 0.89–0.91 g/cm³ |
| Flexural modulus, ISO 178:2019 | 1200–1700 MPa | 700–1000 MPa | 800–1200 MPa |
| Tensile stress at yield, ISO 527-2:2012 | 30–38 MPa | 24–30 MPa | 20–26 MPa |
| Notched Izod at 23 °C, ISO 180/A | 2–5 kJ/m² | 5–10 kJ/m² | 15 kJ/m²–no break |
| HDT at 0.45 MPa, ISO 75-2/B | 90–110 °C | 80–95 °C | 75–90 °C |
Chemical resistance of Jinneng Chemical PP Homopolymer is generally strong in aqueous acids and alkalis at temperatures below 60 °C; oxidising acids such as concentrated nitric acid or chromic acid can attack the polymer. Resistance to organic solvents is limited: at 23 °C, aliphatic hydrocarbons may cause swelling, and chlorinated or aromatic solvents can swell or dissolve the amorphous phase. The material should not be used in contact with strong oxidising media under stress. Stress-cracking resistance in detergents is lower than random copolymer at 50 °C; for caps and closures, environmental stress-crack resistance testing under ASTM D1693 with a 10% soap solution is a practical gate check. Food-contact compliance is usually available for grades meeting FDA 21 CFR 177.1520(c) and EU Regulation 10/2011; specific migration limits are additive-dependent. Restriction of hazardous substances under RoHS Directive 2011/65/EU applies to electrical and electronic equipment parts, not to all mechanical products. REACH registration for the polymer and monomer is required for EU import; the supplier should provide SVHC confirmation for the specific grade.
Unmodified homopolymer PP has poor ultraviolet resistance; outdoor exposure can produce surface chalking and embrittlement within 6–12 months in temperate climates unless carbon black or hindered amine light stabilisers are incorporated. For outdoor parts, UV-stabilised grades are specified according to ISO 4892-2:2013 or ASTM D2565-23 after xenon-arc exposure, with tensile elongation retention typically used as the acceptance criterion. Low-temperature impact is a known limitation: below 0 °C, the brittle-ductile transition of unfilled homopolymer shifts to higher strain rates, making living hinges, snap-fits, and thin-wall containers susceptible to fracture during transport. Notched Izod impact at -20 °C under ISO 180/A is often below 1 kJ/m². For applications requiring cold-weather ductility, an impact copolymer or random copolymer should be specified. In direct food-contact and medical applications, the homopolymer grade must be free of animal-derived slip agents and phthalate-based catalysts; ISO 10993-5 cytotoxicity testing is not inherent to all grades and must be commissioned when required. Processing personnel should avoid mixing homopolymer with random copolymer scrap at levels above 5 wt% because contamination shifts seal initiation temperature and may create inconsistent film haze. The material should be purged from hot runners before shutdown to prevent stagnation above 250 °C for more than 20 min; extended residence time produces odour and discolouration even if the melt temperature remains below decomposition.
