| HS Code | 648777 |
| Product | KUNLUN PP EPS30R |
| Material Type | Polypropylene Impact Copolymer |
| Appearance | White spherical or granular pellets |
| Density | 0.90 g/cm³ |
| Melt Flow Rate | 1.5 g/10 min at 230°C, 2.16 kg |
| Melting Point | 165 °C |
| Vicat Softening Temperature | 130 °C |
| Heat Deflection Temperature | 110 °C at 0.45 MPa |
| Tensile Yield Strength | 25 MPa |
| Elongation At Break | 200% |
| Flexural Modulus | 1000 MPa |
| Izod Impact Strength | 40 kJ/m² at 23 °C |
| Rockwell Hardness | R90 |
As an accredited KUNLUN PP EPS30R factory, we enforce strict quality protocols—every batch undergoes rigorous testing to ensure consistent efficacy and safety standards.
| Packing | KUNLUN PP EPS30R is supplied in 25 kg woven bags with inner plastic liner, ensuring safe handling and dry storage. |
| Container Loading (20′ FCL) | 20′ FCL shipment of KUNLUN PP EPS30R: palletized polypropylene granules, evenly stacked and secured, ensuring stable, safe container loading. |
| Shipping | KUNLUN PP EPS30R is a polypropylene resin shipped as non-hazardous, free-flowing granules. Packaged in 25 kg woven bags or bulk containers, it requires dry, ventilated storage away from heat, open flames, and strong oxidizers. No IMDG/ADR dangerous goods classification applies under normal transport conditions. |
| Storage | Store KUNLUN PP EPS30R in a cool, dry, well-ventilated area, away from direct sunlight, heat sources, and open flames. Keep original packaging sealed to prevent moisture absorption and contamination. Avoid stacking excessively high to prevent deformation. Ensure warehouse floor is clean and dry, with no sharp objects that could damage bags. |
| Shelf Life | KUNLUN PP EPS30R has a typical shelf life of 12 months when stored in a cool, dry, well-ventilated area, protected from direct sunlight and heat sources. |
KUNLUN PP EPS30R is an impact-copolymerised polypropylene grade with a nominal melt mass-flow rate of 1.5–2.0 g/10 min measured at 230 °C and 2.16 kg according to ISO 1133-1:2022. The low melt flow rate, high melt strength, and ethylene-propylene rubber phase position the material in thick-section injection moulding and sheet extrusion segments where low-temperature impact retention, environmental stress cracking resistance, and weld-line performance are controlling design variables.
Molten EPS30R entering a 1,200 t hydraulic clamp injection press for automotive door panel lower inserts exhibits a melt mass-flow rate of 1.5–2.0 g/10 min, necessitating melt temperature set points between 210 °C and 235 °C when wall thickness falls below 2.4 mm. At mould temperatures of 25–45 °C, surface crystallisation freezes a skin layer of 0.15–0.25 mm within 2 s, while the core remains at 160–175 °C; differential shrinkage across the thickness produces sink marks at bosses unless gas counterpressure or pack holding pressure is maintained at 55–70 MPa. The formulation for this trim class is 100 parts EPS30R, 0.15 wt% hindered phenolic antioxidant, 0.15 wt% phosphite secondary antioxidant, and 2.0 wt% carbon black masterbatch; colour-matched grey interiors use 3.0–4.0 wt% polyolefin colour masterbatch. Compliance with FMVSS 302 horizontal burn rate not exceeding 100 mm/min and UN ECE R118 Annex 6 for interior materials is evaluated on 3.0 mm plaques conditioned for 24 h at 23 °C/50% RH. Sequential valve-gate filling on a 1,000 t press shifts weld lines to low-stress zones because the ethylene-propylene rubber phase generates a 15–25% loss in notched Charpy impact at knit lines measured under ISO 179-1:2010 at 23 °C. Terminal parts include door lower trim panels, B-pillar lower covers, seat belt lower anchors, and rear parcel shelf supports.
Logistics crate production with EPS30R begins at the floor-mounted silo with a desiccant dryer set to 70–80 °C for 2 h only when post-warehouse moisture exceeds 0.05 wt%; unfilled granules generally process without drying because polypropylene retains less than 0.01 wt% moisture at 50% RH. The injection process for a 4.5–5.0 mm nominal wall crate uses a 1,300–1,600 t clamp force machine, melt temperature 200–220 °C, injection velocity 40–90 mm/s, switch-over pressure 70–95 MPa, and pack/hold pressure 35–60 MPa for 6–12 s; total cycle time falls between 38 s and 52 s for 30 kg pallet boxes. Gate geometry matters: direct edge gates of 2.5–3.0 mm thickness prevent jetting, while relieved corners with R4–R6 mm fillets reduce residual hoop stress that causes cold-weather fracture at stack interlocks. The formulation includes 100 parts EPS30R, 0.20 wt% antioxidant stabiliser, 0.50 wt% calcium stearate, and 0.30–0.60 wt% antistatic masterbatch for dust-controlled distribution centres; outdoor pallet boxes receive an additional 4.0–8.0 wt% UV stabiliser masterbatch. Compliance for export pallets is anchored to ISO 8611-1:2021 racking and stacking load tests and ASTM D5276-19 free-fall drop testing at -20 °C, with acceptance at 3 drops from 0.8 m without structural collapse. Terminal products include vented fruit distribution crates, collapsible bulk bins, stack-only logistics pallet boxes, and reusable parcel sorting trays.
Short-glass reinforced PP compounds based on EPS30R are produced on a co-rotating twin-screw extruder with L/D 40:1 to 44:1, a side feeder at barrel zone 6, and vacuum degassing at -0.06 MPa gauge; barrel temperatures from 180 °C in the feed zone to 220 °C at the die produce a melt temperature of 235–245 °C at 300 rpm and 800–1,200 kg/h throughput depending on screw configuration. The compound formulation uses 70–80 wt% EPS30R, 20–30 wt% chopped E-glass fibre of 4.5 mm nominal length and 13 µm diameter, and 1.0–2.0 wt% maleic anhydride-grafted PP coupling agent; below 1.0 wt% coupling agent, fibre pull-out under ISO 527-1:2019 tensile stress generates non-linear stress–strain curves, whereas above 2.5 wt% coupling agent the melt viscosity rises by 15–25%, tripping the extruder torque alarm and reducing fibre length retention below 0.5 mm. The pelletised compound is then injection moulded into under-bonnet components with melt temperature 210–230 °C, mould temperature 30–60 °C, and injection pressure 80–110 MPa; hot-runner systems with valve gates of 1.2–1.8 mm diameter prevent free glass fibre accumulation at the gate edge. Heat ageing is assessed by ISO 188 at 120 °C for 1,000 h, with tensile strength retention of at least 60% required by several OEM material specifications; published data for this specific EPS30R/glass combination under long-term immersion in 50% ethylene glycol at 100 °C is limited. Terminal parts include radiator fan shrouds, engine covers, air cleaner housings, battery trays, and timing belt covers; these applications balance impact stress at -30 °C and stiffness at 80 °C measured under ISO 178:2019 flexural modulus.
Sulphuric acid resistance screening for EPS30R battery container mouldings is performed according to ASTM D543-21 after immersion in 30 wt% H₂SO₄ at 60 °C for 72 h; the combination of low melt flow and rubber phase reduces susceptibility to acid-induced environmental stress cracking, but injection-moulded containers require gate placement at the centre of the bottom face to avoid side-wall weld lines where crack propagation initiates. The formulation used in this segment is 100 parts EPS30R, 2.0–3.0 wt% carbon black masterbatch for UV protection of cell partitions, and 0.10–0.20 wt% antioxidant package; no hygroscopic filler is introduced, avoiding the pre-drying time needed in talc-filled variants. Moulding is carried out on a 650–900 t press with a hot runner valve-gate system, melt temperature 220–240 °C, mould temperature 15–30 °C, pack pressure 40–60 MPa, and cooling time 30–60 s for wall sections of 2.0–3.5 mm; low mould temperature accelerates skin formation and raises residual stress at sharp cell wall transitions, so the design radius at the container bottom should not fall below R3 mm. Compliance for finished starter battery containers references EN 50342-1:2015 for mechanical robustness, electrolyte retention, and electrical safety of lead-acid starter batteries, while material traceability follows REACH 1907/2006 and RoHS 2011/65/EU. Terminal product types include 12 V SLI battery containers and lids for 60–150 Ah passenger and commercial vehicle batteries; published time-to-crack data for EPS30R in dilute sulphuric acid under dynamic fatigue is limited.
Talc-filled washing machine tub formulations impose a trade-off between flexural modulus and notched impact, and the addition level is controlled at 20–40 wt% talc masterbatch, corresponding to 12–28 wt% pure talc in the final compound, with the remainder EPS30R. Below 20 wt% talc masterbatch, tub wall deflection under unbalanced load testing increases beyond the bearing alignment tolerance of 0.3 mm; above 40 wt% talc masterbatch, weld line impact strength under ISO 179-1:2010 drops by 30–50% compared with the unfilled matrix, increasing the risk of fracture at the bearing insert. The downstream process runs through a co-rotating twin-screw extruder at 190–210 °C using L/D 40:1 for masterbatch dilution, followed by injection moulding on a 1,000–1,400 t press at melt temperature 200–225 °C, mould temperature 35–55 °C, and pack pressure 60–80 MPa; venting is required at -0.04 MPa to remove moisture released by the talc carrier resin. Compliance for finished appliances is anchored to IEC 60335-1:2020 for household safety, with material traceability under REACH 1907/2006 and RoHS 2011/65/EU. Terminal products include washing machine outer tubs, spin tubs, and counterweight housing covers.
Sheet extrusion temperature profiles for a 90 mm single-screw extruder with a 1,200 mm coat-hanger die are set from 190 °C at the feed throat to 215 °C at the die when EPS30R is converted to heavy-gauge sheet for thermoformed dunnage. The low melt flow creates backpressure of 180–250 bar at 80 rpm, while melt strength prevents sag between the die and the three-roll stack; the die gap is kept at 2.5–3.0 mm for a final sheet thickness of 3.0–5.0 mm, with take-off speed adjusted to control draw-down and avoid thickness variation above 0.2 mm. Chill rolls operate at 30–60 °C, producing a surface gloss difference of 10–15% between polished upper roll and matte lower roll; differential cooling is balanced by setting the lower roll temperature 5–10 °C below the upper roll to prevent curl. The formulation comprises 100 parts EPS30R, 0.10 wt% hindered phenolic antioxidant, 0.10 wt% phosphite antioxidant, and 0.50 wt% nucleating masterbatch or 1.0–2.0 wt% UV stabiliser masterbatch for outdoor loading docks; antistatic masterbatch is added at 0.30–0.50 wt% where sheet is used for electronic component partitions. Compliance for European automotive trunk components invokes REACH 1907/2006 and RoHS 2011/65/EU, with VOC emission screened under VDA 277 if the sheet enters passenger compartment-adjacent zones. Terminal products include thermoformed reusable dunnage trays, trunk floor supports, package separator sheets, and protective battery transport trays.
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KUNLUN PP EPS30R is a low-flow, impact-modified polypropylene copolymer comprising a polypropylene continuous phase and a dispersed ethylene-propylene rubber phase. The product is manufactured under the PetroChina Kunlun brand and supplied as stabilized pellets for sheet extrusion, thermoforming, corrugated board, blow moulding, and thick-wall injection moulding. Manufacturer-published datasheets list a melt mass-flow rate of 1.5 g/10 min when determined in accordance with ISO 1133-1:2022 at 230 °C with a 2.16 kg piston load, a density of 0.900–0.910 g/cm³ under ISO 1183-1:2019, and a tensile yield stress near 25 MPa under ISO 527-2:2012. The grade is specified for applications requiring high crack-arrest capacity and moderate stiffness rather than high melt fluidity. Lot-specific certificate of analysis values should be used for production setup because datasheet figures are typical values and do not constitute release limits.
| Property | Test standard | Typical value | Unit |
|---|---|---|---|
| Melt mass-flow rate at 230 °C, 2.16 kg | ISO 1133-1:2022 | 1.5 | g/10 min |
| Density | ISO 1183-1:2019 | 0.900–0.910 | g/cm³ |
| Tensile yield stress | ISO 527-2:2012 | 25 | MPa |
| Tensile elongation at break | ISO 527-2:2012 | ≥400 | % |
| Flexural modulus | ISO 178:2019 | 1100 | MPa |
| Notched Izod impact at 23 °C | ISO 180/A | ≥30 | kJ/m² |
| Notched Izod impact at -20 °C | ISO 180/A | 5–8 | kJ/m² |
| Vicat softening temperature, A50 method | ISO 306:2022 | 150 | °C |
The low-temperature impact response derives from the two-phase morphology rather than from simple plasticization. The ethylene-propylene rubber domains, generated during the copolymerization sequence, act as stress concentrators and cavitate under notch-opening deformation. This cavitation releases triaxial constraint at the crack tip and permits shear yielding of the surrounding polypropylene matrix. In practice, this mechanism raises the notched Izod impact strength at -20 °C to approximately 5–8 kJ/m² under ISO 180/A, whereas a comparable homopolymer polypropylene grade typically fails in a brittle mode at the same temperature. The xylene-soluble rubber fraction can be measured according to ASTM D5492-17 for incoming resin characterization. The extent of the toughening effect depends on the rubber-phase volume fraction, domain size distribution, and matrix isotacticity. Exact morphological data for this grade are limited in published literature; processors should therefore verify low-temperature impact behaviour on finished parts under ASTM D256 or ISO 180/A rather than rely solely on resin pellet data. The grade is not intended for transparent applications because the dispersed rubber phase produces a translucent appearance and reduces gloss compared with polypropylene random copolymers.
In sheet extrusion environments where sag resistance determines minimum attainable gauge variation, KUNLUN PP EPS30R is processed on single-screw extruders with barrier-type screws and an L/D ratio of 30:1 or higher. A melt temperature window of 200–230 °C is used at the die, with adaptor and die temperatures held within 210–240 °C to avoid thermal-oxidative degradation of the ethylene-propylene phase. Chill roll temperatures between 20 °C and 60 °C are maintained for surface solidification; higher roll temperatures reduce residual internal stress but increase release difficulty. The low melt mass-flow rate of 1.5 g/10 min provides high melt strength and reduces draw-down in flat-die sheet, but it also raises melt pressure and extruder motor load relative to higher-flow grades. Pre-drying at 80 °C for 2 h in dehumidified air is recommended when pellets have been exposed to ambient relative humidity above 60% or when regrind is incorporated at levels above 20 wt%. Published data for specific extrudate cooling rates and their effect on sheet warpage in this grade are limited; production trials should include edge-trim regrind evaluation and gauge profiling across the die width.
In capillary rheometry under ISO 11443:2021, an impact copolymer of this melt flow class typically exhibits pronounced shear thinning. At 230 °C, apparent shear viscosity may fall from approximately 3000 Pa·s at 100 s-1 to below 200 Pa·s at 1000 s-1. The exact curve for KUNLUN PP EPS30R should be generated on the production lot, because rheological response is sensitive to rubber-phase molecular weight, ethylene content, and antioxidant package. Pressure-volume-temperature data can be collected by ISO 17744:2004 for packing-phase analysis in thick-wall moulding; published data for this specific grade are limited, so cavity-pressure simulation should be calibrated against measured material data rather than generic library values.
Because the dispersed ethylene-propylene rubber phase lowers crack-propagation velocity under sub-ambient impact, KUNLUN PP EPS30R is used for returnable transit packaging, industrial containers, and dunnage that experience cold-chain or outdoor exposure. Notched Izod impact at -20 °C under ISO 180/A is typically reported in the range of 5–8 kJ/m², which permits ductile hinge behaviour in parts that would otherwise shatter if produced from a homopolymer polypropylene. The trade-off is a reduction in flexural modulus to approximately 1100 MPa, compared with 1400–1500 MPa for homopolymer extrusion grades. Components designed for sub-zero use should include radii at corners and avoid sharp notches, because the rubber-toughening mechanism is most effective at low strain rates and can be overwhelmed by high-rate puncture loading. Dimensional change due to thermal contraction at -20 °C is approximately 0.8–1.2% relative to 23 °C for semicrystalline polypropylene; fixture spacing and hinge clearances must accommodate this movement. In food-contact returnable applications, migration testing under the intended temperature and food simulant is required before use.
Extrusion blow moulding of KUNLUN PP EPS30R is conducted with accumulator-head machines or continuous-extrusion shuttle machines capable of generating the melt strength required for parison stability. Melt temperature at the die is maintained between 190 °C and 220 °C; die-gap settings of 2–4 mm are common for 3–10 L containers, and parison programming is used to compensate for wall-thinning at the pinch-off and shoulder. Die swell compensation for the parison diameter is typically 15–25% due to the elasticity of the rubber phase. Blow pressure is typically 0.4–0.7 MPa, with mould temperatures held at 20–40 °C to shorten cycle times. The accumulator head should be purged at shutdown because the ethylene-propylene rubber phase can form gels if retained at melt temperature for prolonged periods. For corrugated board, the resin is extruded through a flat die into a nip of polished rolls at melt temperatures of 200–240 °C; the sheet is then thermoformed into hollow twin-wall profiles. The low MFR of 1.5 g/10 min supports web retention during chill-roll transfer, but the lower fluidity demands higher barrel temperatures than are used for high-flow injection grades. Moisture accumulation from outdoor silo storage should be managed because condensed surface water on pellets can generate splay defects despite the non-hydrolytic nature of polypropylene.
Outdoor exposure of unpigmented KUNLUN PP EPS30R results in surface oxidation and chalking unless an ultraviolet stabilizer package is added during conversion. The standard pellet antioxidant system is not necessarily sufficient for continuous outdoor UV exposure; the final part, not the pellet, must be tested under ASTM D4329-13 or ISO 4892-2:2013 for intended service life. Contact with copper-based biocides, transition-metal salts, or flame-retardant systems containing free halogens can accelerate degradation of the ethylene-propylene rubber phase; such combinations should be evaluated by oxidative induction time testing under ASTM D3895-19 and by mechanical property retention after accelerated heat aging.
Food-contact status for KUNLUN PP EPS30R must be verified on the final article under the intended conditions of use. Olefin polymers may satisfy FDA 21 CFR 177.1520(c) and EU Regulation (EU) No 10/2011, but additive packages, regrind content, and surface-to-volume conditions alter migration behaviour. The resin is supplied as a polymer substance; monomers and additives used during manufacture are subject to REACH registration obligations where applicable. Electrical and electronic applications require assessment against RoHS 2011/65/EU for restricted substances in the final homogeneous material. No compliance statement is made for the product alone without component-specific data.
Table 2 summarizes representative class data obtained from publicly available datasheets; the figures are not lot-specific guarantees for any named manufacturer grade. The product occupies a low-fluid, high-toughness segment. Homopolymer grades provide higher stiffness and lower cost but fail brittle at sub-zero temperatures. Random copolymers provide transparency and lower sealing temperatures but sacrifice low-temperature impact and flexural modulus. High-flow impact copolymers fill thin-wall injection moulds with lower clamp force but have lower melt strength and are less suited to sheet or blow-moulded parison stability.
| Resin type | Nominal melt mass-flow rate | Notched Izod impact at 23 °C | Notched Izod impact at -20 °C | Flexural modulus | Optical character |
|---|---|---|---|---|---|
| KUNLUN PP EPS30R impact copolymer | 1.5 g/10 min | ≥30 kJ/m² or no break | 5–8 kJ/m² | 1100 MPa | translucent |
| PP homopolymer extrusion grade | 3.0 g/10 min | 2–4 kJ/m² | brittle | 1500 MPa | translucent |
| PP random copolymer | 1.0 g/10 min | 6–10 kJ/m² | 2–4 kJ/m² | 900 MPa | transparent |
| High-flow impact copolymer | 25 g/10 min | 8–12 kJ/m² | 3–4 kJ/m² | 1200 MPa | translucent |
Historically, processors have selected lower-melt-flow impact copolymers for thick-section profiles and lower tonnage injection when low-temperature toughness is the controlling specification. KUNLUN PP EPS30R is not recommended for thin-wall injection below 1.0 mm, because the high melt viscosity of a 1.5 g/10 min resin at standard barrel temperatures may produce short shots, weld-line weakness, and elevated injection clamp force. For moulding applications, melt temperature may be raised toward 230 °C to improve filling, but residence time above 230 °C should be kept below 10 min to limit thermal-oxidative degradation of the rubber phase and the antioxidant package. Published data for specific clamp force requirements for this grade are limited; cavity-filling studies should be performed on the intended tool before full production. The lot-to-lot melt flow variation should be verified against ISO 1133-1:2022 certificate values before establishing final barrel-temperature profiles.
