| HS Code | 620536 |
| Polymer Type | Polypropylene Impact Copolymer |
| Density G Cm3 | 0.9 |
| Melt Flow Rate G 10min | 8.0 |
| Tensile Yield Strength Mpa | 28 |
| Elongation At Yield Percent | 13 |
| Flexural Modulus Mpa | 1300 |
| Charpy Impact Strength 23c Kj M2 | 55 |
| Charpy Impact Strength 20c Kj M2 | 20 |
| Heat Deflection Temperature 0 45mpa C | 100 |
| Vicat Softening Temperature C | 150 |
| Melting Point C | 165 |
| Rockwell Hardness R | 100 |
As an accredited Sinopec PP K8009 factory, we enforce strict quality protocols—every batch undergoes rigorous testing to ensure consistent efficacy and safety standards.
| Packing | Sinopec PP K8009 is supplied in 25 kg sealed woven bags, with moisture-proof lining, ensuring safe transport and storage. |
| Container Loading (20′ FCL) | 20′ FCL container loaded with Sinopec PP K8009 polypropylene resin, packed in woven bags on pallets for safe transport. |
| Shipping | Sinopec PP K8009 is a polypropylene copolymer supplied as solid pellets. It ships as non-hazardous cargo in sealed woven bags or jumbo bags inside containers. Keep dry and protected from moisture, heat, and direct sunlight during transit. No special hazardous material handling is required. |
| Storage | Store Sinopec PP K8009 in a cool, dry, well-ventilated area away from direct sunlight, heat sources, and open flames. Keep bags sealed and protected from moisture, rain, and contamination. Avoid excessive stacking or mechanical damage. Maintain moderate temperatures and follow standard polymer handling practices to preserve product quality and safety. |
| Shelf Life | Sinopec PP K8009 has a typical shelf life of two to three years when stored in cool, dry, ventilated conditions, protected from direct sunlight. |
On automotive door panel lower substrates with wall stock held between 2.2 mm and 2.5 mm, Sinopec PP K8009 is processed at a nozzle melt temperature of 220 °C to 230 °C and a mold temperature of 35 °C to 45 °C on hydraulic toggle presses rated between 1,600 t and 2,200 t clamp force. Flow-front hesitation occurs at the grained cavity surface where texture depth ranges from 35 µm to 80 µm; the resulting streaking is controlled by staging injection velocity from 30–50 mm/s in the first 5 mm of fill to 180–250 mm/s linear front speed after the gate land. Weld lines form downstream of the map-pocket core and at clip towers; these zones are assessed under ISO 179-1/1eA at −20 °C. If the weld-line notched Charpy impact falls below 4.5 kJ/m², gate relocation or overflow wells are required before the mold is approved for production. Machine-direction shrinkage of 0.8–1.0% and transverse shrinkage of 0.5–0.7% are typical for impact-copolymer PP of this wall stock after 48 h at 80 °C post-mold annealing; the tool is compensated by adjusting cavity dimensions under ISO 294-1:2017 specimen molding practice. Surface moisture is the dominant defect source because polypropylene is not hydrolytically sensitive; granulate stored in unheated silos at RH above 60% is hopper-dried at 80 °C for 2 h to eliminate splay. Finished parts are unpainted lower door panel substrates with molded-in map pocket, speaker grille ring and clip tower, tested for flexural modulus under ISO 178:2019 and notched Charpy impact under ISO 179-1/1eA.
Thin-wall vacuum cleaner and air-purifier housing panels are gated at a nominal wall stock of 1.8 mm to 2.2 mm. Melt mass-flow rate is verified at 230 °C under 2.16 kg in accordance with ISO 1133-1:2022; the nominal range for K8009 is 8.0–10.0 g/10 min. The limiting variable is not melt temperature alone but flow-front cooling in unheated sections of the cavity. When the flow-length-to-wall-thickness ratio exceeds 250:1, skin-layer solidification occurs before pack pressure can act, and short shots appear at end-of-fill bosses. Injection velocity is therefore profiled: 30–50 mm/s for the first 5 mm to prevent jetting, followed by 200–300 mm/s linear front speed until 90% fill, then switchover to pack pressure of 45–70 MPa for 4–6 s. Hot-runner valve-gated systems with independent tip temperature control at 230 °C are used to keep gate diameter above 1.2 mm and to avoid gate freeze before pack. Screw cushion is held at 3–5 mm to reduce shot-to-shot density variation. The molded parts become snap-fit appliance housing shells that must remain dimensionally stable after 24 h at 80 °C; warpage is measured in a 23 °C/50% RH conditioning room under ISO 291:2008. If wall thickness drops below 1.5 mm, the probability of short shots rises, and published data for K8009 in sub-1.5 mm high-speed injection is limited.
For stackable cold-storage crates and pallet corner blocks molded from K8009, blending with plant regrind from sprue and runner systems is common. Below 15 wt% regrind, the melt flow shift is negligible; at 25 wt% regrind by mass, screw recovery time commonly decreases because repeated heat histories lower melt viscosity, and notched Charpy impact at −20 °C under ISO 179-1/1eA typically falls by 10–20% relative to virgin feedstock. If the cold-storage part must retain a −20 °C notched Charpy acceptance criterion of 6.0 kJ/m², the regrind fraction is capped at 20 wt% and virgin K8009 is metered through a gravimetric blender with an accuracy of ±0.5%. Injection molding uses open-nozzle machines with 120–160 t clamp force, mold temperature of 15–25 °C for cycle-time reduction, and cold-runner direct edge gates; gate land thickness is 1.5–2.0 mm to avoid brittleness at the gate. The molded articles are 600 mm × 400 mm × 320 mm crates and 120 mm × 120 mm × 100 mm pallet corner blocks rated for −20 °C cold-storage service. Puncture impact is checked under ISO 6603-2:2023 on 60 mm × 60 mm plaques cut from the container base.
Molding monobloc chairs and stadium seating shells from PP K8009 requires rib-to-wall ratio control to avoid sink marks. In 3.5–5.0 mm nominal wall chairs, ribs are dimensioned at 50–60% of adjacent wall thickness; ribs above 0.65:1 create visible sink marks on the seating surface and add unnecessary mass. Gate location is placed behind the backrest lower edge; flow from a single submarine gate fills the seat and backrest through a 1.5 m flow path. Screw plasticizing capacity must match shot volume; a 1,200–1,600 t clamp force machine with a 70–100 mm screw diameter is common for this part family. Mold temperature is held at 25–35 °C and post-mold cooling occurs in a gauge fixture; machine-direction shrinkage of 1.2–1.6% is typical for unfilled impact-copolymer PP at this wall thickness. Warpage is controlled by balancing gate and vent positions rather than by raising mold temperature alone. The production output is a weather-resistant monobloc chair or stadium seat shell; mechanical stability is verified under EN 12520:2015 for domestic seating and flammability under EN 1021-1:2014 where upholstered.
When K8009 is compounded with a lamellar talc masterbatch at 10 wt% to 20 wt% talc, flexural modulus increases but the ductile-to-brittle transition temperature shifts upward. In a co-rotating twin-screw extruder with L/D ratio 40:1 and 12 heating zones, K8009 pellets are flood-fed into the main hopper, talc is side-fed at zone 5, and melt temperature is held at 190–210 °C. Screw speed is set at 300–500 rpm; specific mechanical energy input is 0.20–0.30 kWh/kg for dispersive mixing without degrading the impact-copolymer phase. Test specimens are injection molded under ISO 294-1:2017 and conditioned under ISO 291:2008; flexural modulus is measured under ISO 178:2019, notched Charpy impact under ISO 179-1/1eA at 23 °C and −20 °C. At 20 wt% talc, flexural modulus commonly rises 40–60% over the unfilled base, while notched Charpy impact at −20 °C may fall below 3.0 kJ/m², making the compound unsuitable for snap-fit covers with high local strain. Under-hood air ducts require long-term heat aging at 90–110 °C; published data for K8009 with talc above 20 wt% in continuous hot-air aging is limited. The compounded pellet is then injection molded into air intake ducts, cowl panel supports and resonator shells; weld lines at fastening bosses are assessed with pressure-sensitive film to ensure full contact before production approval.
Battery carrier bases for light electric vehicle battery packs demand low-temperature impact retention because cell modules are mounted through molded-in brass inserts. Unmodified PP K8009 is processed at a nozzle melt temperature of 220–240 °C and a mold temperature of 40–50 °C in a tool with 8–10 mm thick boss structures; packing pressure is 50–80 MPa and hold time is 8–12 s to prevent sink around inserts. Notched Charpy impact is measured under ISO 179-1/1eA on specimens cut from the insert zone; if the −20 °C value falls below 3.5 kJ/m², the insert design is revised to include rounded perforations or a local rib reinforcement. Insert retention is tested by axial pull-out on a universal testing machine at 5 mm/min crosshead speed; no standard specifies this exact fixture configuration. If the battery pack housing requires UL 94 V-0 flame retardancy, unmodified K8009 is not applicable; a halogen-free intumescent package must be compounded, and published data for K8009 in UL 94 V-0 compound form is limited. The resulting component is a battery carrier base frame with M6 brass threaded inserts and snap-fit cell module retention ribs, supplied without secondary finishing.
For refrigerator door capping profiles and hinge covers molded from unfilled PP K8009, melt temperatures are held at 210–230 °C and mold temperatures at 30–40 °C. The parts are 400–700 mm long capping strips with wall stock from 2.0 mm to 2.8 mm; they are evaluated for dimensional stability and mechanical strength under IEC 60335-1:2020. Gate blush is reduced by selecting a tab gate with land length of 1.0–1.5 mm and thickness of 0.8–1.2 mm. Shrinkage after 24 h at 23 °C is 0.8–1.0% machine direction; the tool is dimensionally compensated during mold design to maintain hinge alignment. Indirect food-contact compatibility is not automatic; compliance with EU Regulation 10/2011 must be confirmed for the molded part if contact with food is intended. The mold produces refrigerator door capping strips, hinge covers and control panel housings.
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Sinopec PP K8009 is an impact copolymer polypropylene grade supplied under the K8009 model designation. The material consists of a propylene homopolymer continuous phase and a dispersed ethylene–propylene rubber phase, a structure that raises notched impact resistance relative to homopolymer polypropylene while retaining processability suitable for injection molding. It is directed toward automotive interior and exterior components, appliance housings, battery casings, crates, and industrial structural parts where ambient and moderate low-temperature ductility plus medium melt flow are specified. The melt mass-flow rate is typically reported as 9 g/10 min at 230 °C and 2.16 kg under ISO 1133-1:2022, positioning K8009 between low-flow impact copolymers and high-flow thin-wall molding grades.
The K8009 grade classification places it among reactor-made impact copolymers with ethylene comonomer content concentrated in the dispersed rubber phase. Published datasheets for this grade report density at 0.90 g/cm³ using ISO 1183-1:2019 and tensile yield stress near 26 MPa under ISO 527-2:2012. Flexural modulus is generally reported in the range 1100–1300 MPa according to ISO 178:2019. The notched Charpy impact strength at 23 °C exceeds 40 kJ/m² under ISO 179-1:2010; at -20 °C the published value falls in the range 5–9 kJ/m², indicating a ductile-to-brittle transition relevant to cold-service parts. The values below are representative of injection-molded specimens conditioned according to the referenced methods.
| Property | Test method | Unit | Published range or typical value |
|---|---|---|---|
| Melt mass-flow rate, 230 °C/2.16 kg | ISO 1133-1:2022 | g/10 min | 8–10 |
| Density | ISO 1183-1:2019 | g/cm³ | 0.90 |
| Tensile yield stress | ISO 527-2:2012 | MPa | 24–27 |
| Elongation at break | ISO 527-2:2012 | % | >200 |
| Flexural modulus | ISO 178:2019 | MPa | 1100–1300 |
| Notched Charpy impact, 23 °C | ISO 179-1:2010 | kJ/m² | >40 |
| Notched Charpy impact, -20 °C | ISO 179-1:2010 | kJ/m² | 5–9 |
| Vicat softening temperature, 50 N | ISO 306:2013 | °C | 150–155 |
| Heat deflection temperature, 0.45 MPa | ISO 75-2:2013 | °C | 85–95 |
In thin-wall injection molding sequences where K8009 replaces lower-flow impact copolymers, the 9 g/10 min melt mass-flow rate reduces flow-path pressure loss across gates and rib roots. The lower melt viscosity permits filling of wall stocks from 1.2 mm to 3.0 mm on hydraulic injection molding machines with clamp forces between 800 kN and 12,000 kN, depending on projected area. Barrel temperature profiles commonly range from 200 °C at the rear zone to 250 °C at the nozzle, with mold temperature controlled at 30–60 °C. Processing below a mold temperature of 30 °C is not recommended for impact-sensitive geometries because rapid skin solidification freezes highly oriented flow layers and can shift the notched Charpy response downward in ribbed areas.
Residence time should be kept below 10 minutes at melt temperatures above 240 °C; prolonged thermal exposure in the barrel accelerates chain scission of the propylene homopolymer matrix and reduces melt strength, leading to gate splay and silver streaking. If storage relative humidity exceeds 60%, superficial moisture can be removed by hopper drying at 80 °C for 2 hours, although polypropylene is not hygroscopic and bulk hydrolysis is negligible. Screw L/D ratios between 20:1 and 24:1 with a general-purpose compression screw provide sufficient homogenization; high-shear mixing elements are not required and may overheat the melt. For flow simulation, the material dataset should include shear viscosity, PVT, thermal conductivity, specific heat, and tensile modulus. Capillary rheometry under ISO 11443:2021 at three temperatures spanning 200 °C, 230 °C, and 260 °C is required for reliable short-shot and weld-line prediction.
On production-scale injection molding machines, common processing defects observed with this grade include gate blush when melt temperature exceeds 250 °C, jetting in deep-draw cavities when injection speed exceeds the critical shear rate, and sink marks opposite ribs when packing pressure is released before gate freeze. The gate seal time for a 2 mm wall under a 60 °C mold condition is short due to semi-crystalline solidification; process limits should be established by cavity pressure transducers rather than timer-based transfer alone.
The low-temperature impact response of K8009 is governed primarily by the glass transition of the dispersed ethylene–propylene rubber phase and by rubber particle size distribution. Under ISO 179-1:2010 notched Charpy conditions, the transition from ductile to brittle failure occurs between 0 °C and -20 °C. The notched Izod test under ASTM D256-10 typically yields lower absolute energy, and direct comparison between ISO and ASTM data is invalid because specimen dimensions and notch radii differ. In thick sections above 6 mm, cooling-rate gradients produce a skin/core morphology with smaller rubber particles near the mold surface and coarser rubber domains in the core; the core region governs crack propagation resistance. Weld lines formed by flow fronts around holes or inserts reduce local impact strength to 25–50% of the bulk value, depending on melt temperature and packing pressure.
Weathering exposure further embrittles the rubber phase through thermo-oxidative chain scission, requiring carbon black or hindered amine stabilizer packages for exterior service. Published outdoor aging data for K8009 in unpigmented form are limited; long-term UV resistance must be verified by xenon arc testing under ISO 4892-2:2013 or an equivalent automotive OEM standard before exterior approval.
A comparison against K8003, a lower-flow impact copolymer from the same Sinopec PP family, isolates the effect of melt flow on processing and properties. K8003 is typically reported at 3 g/10 min under ISO 1133-1:2022, giving higher viscosity and better melt strength for thick-wall injection molding where impact resistance is prioritised over fill speed. K8009 at 9 g/10 min permits shorter injection time and longer flow path at equal pressure, but the molecular weight reduction may lower notched impact at -20 °C by a small margin relative to K8003. Against homopolymer grades such as T30S or F401, K8009 shows substantially higher notched Charpy resistance at both 23 °C and -20 °C, but flexural modulus is lower by roughly 300–500 MPa, making it unsuitable for rigid structural beams where creep and buckling control design. Against random copolymers of propylene and ethylene, K8009 is opaque and has higher impact resistance; it is not selected for transparent packaging or syringe barrels that require contact clarity.
| Grade | MFR, 230 °C/2.16 kg | Flexural modulus | Notched Charpy, 23 °C | Distinguishing character |
|---|---|---|---|---|
| K8009 | 8–10 g/10 min | 1100–1300 MPa | >40 kJ/m² | Medium-flow impact copolymer for thin-wall injection molding |
| K8003 | 2.5–3.5 g/10 min | 1000–1300 MPa | >45 kJ/m² | Lower-flow impact copolymer for high-impact thick sections |
| T30S | 2.5–3.5 g/10 min | 1400–1700 MPa | 2–5 kJ/m² | Homopolymer, high stiffness, low impact |
K8009 is a semi-crystalline polypropylene; post-crystallization shrinkage and warpage are influenced by mold temperature, part thickness, and rubber content. Typical ISO 294-4 shrinkage values for unfilled impact copolymers fall between 1.0% and 1.5% in the flow direction and 0.8%–1.3% cross-flow. Shrinkage anisotropy is expected in unfilled grades. The exact K8009 shrinkage should be determined on a cavity transfer mold under ISO 294-4:2018. Lower mold temperatures reduce cycle time but increase frozen-in orientation and can magnify post-mold warpage after 48 hours at room temperature. Pre-conditioning at 80 °C for 2 hours is sometimes used to stabilise dimensions before metrology.
For applications where K8009 enters the European Union market, the grade is expected to comply with REACH registration and with RoHS Directive 2011/65/EU restriction limits for lead, mercury, cadmium, hexavalent chromium, PBB, and PBDE when tested according to the IEC 62321 series. For food-contact adjacency, regulatory acceptance should be confirmed against FDA 21 CFR 177.1520 for olefin polymers or EU Regulation (EU) No 10/2011 with specific migration testing according to EN 1186 and EN 13130 series; a general industrial grade cannot be assumed food-contact compliant without lot-specific certification. Automotive interior components are often tested according to ISO 3795 for burning rate or FMVSS 302. K8009 as a polyolefin has an HB classification under UL 94 unless flame-retardant modification is applied. The grade is not inherently flame retardant and should not be used in enclosures requiring V-2 or better ratings without additive qualification.
Lot-to-lot variation in ethylene content and rubber particle size can shift the notched Charpy value by several kJ/m² in downstream molding. Incoming inspection should include melt flow rate by ISO 1133-1:2022 and notched Charpy on standardized plaques at 23 °C and -20 °C according to ISO 179-1:2010. On production-scale masterbatch dilution lines, local overheating at 240 °C can induce precursor sites for surface oxidation; extruder barrel vents should be kept open and specific energy input controlled. Published data on batch-to-batch variance for K8009 are limited in public literature, so process capability should be established on cavity-specific tooling.
Automotive applications include bumper brackets, glove box housings, door trim brackets, and battery trays. The material is selected where notched Charpy at 23 °C above 40 kJ/m² under ISO 179-1:2010 is required and where wall thickness falls between 1.5 mm and 4.0 mm. In appliance housings, K8009 supports snap-fit assembly because the ethylene–propylene rubber phase provides local ductility during assembly deflection; however, repeated snap-fit cycling can cause stress whitening at bends, and design strain should be validated by tensile creep testing at service temperature. The material is resistant to dilute acids and alkalies at ambient temperature but should not be continuously exposed to strong oxidising acids, aromatic hydrocarbons, or chlorinated solvents, which swell the rubber phase and reduce yield stress. Designers commonly apply a draft angle of 0.5°–1° on textured ribs and require a minimum distance of 1.5 times the nominal wall thickness between gate and first flow obstruction to reduce weld-line risk. Published data for creep modulus and fatigue resistance in K8009 compounds under arbitrary service conditions are limited; structural load-bearing parts should be validated with ISO 899-1 creep tests or ISO 6603 puncture tests on molded plaques representative of production cavities.
