Request a POE Quotation: What We Need From You to Quote in 24 Hours — polyolefin elastomer grade selection is determined by comonomer type, melt flow ratio, density, and additive package. Quotation turnaround within 24 hours is feasible when the submitted data set includes melt mass-flow rate according to ISO 1133-1:2022 at 190 °C/2.16 kg, density according to ISO 1183-1:2019, and target durometer according to ASTM D2240-15. Missing these values routinely extends the specification cycle beyond 48 hours because grade narrowing cannot begin without a valid melt index and density pair.

POE resins are ethylene-α-olefin copolymers produced with single-site or constrained-geometry catalyst systems. Octene incorporation between 15 wt% and 45 wt% lowers density to 0.857–0.895 g/cm³, while melt index spans 0.5–30 g/10 min. The narrow molecular weight distribution, typically a polydispersity index of 2.0–3.0, produces shear viscosity profiles that are less shear-sensitive than LDPE but more shear-thinning than metallocene plastomers with equivalent comonomer content. These boundaries define the standard catalog space for polyolefin elastomer quotations.

Which Rheological Data Points Prevent a 24-Hour Quotation Delay?

Melt flow ratio, defined as the 21.6 kg MFR divided by the 2.16 kg MFR, indicates long-chain branching and shear-thinning response. For extrusion coating POE, a melt flow ratio of 8–12 is commonly paired with a 2.16 kg MFR of 3–8 g/10 min. For injection molding, a 2.16 kg MFR of 10–30 g/10 min and a flow path-to-wall thickness ratio above 150:1 should be accompanied by a mold fill analysis on equipment with a clamp force of 800–2,000 kN. Capillary rheometry at 190 °C over apparent shear rates of 100–10,000 s⁻¹ is preferred when thin-wall parts show shear heating. The quotation data set should state nozzle temperature, hot-runner pressure limit, and gate type because POE grades differ in pressure-dependent viscosity and gate-freeze time. Absent these parameters, the quotation defaults to a general-purpose grade that may lie outside the actual processing window of ±5 °C.

In impact modification of polypropylene, a POE grade with 30–40 wt% octene and a 2.16 kg MFR of 0.5–2.0 g/10 min is dry-blended at 15–25 wt% with PP homopolymer on a co-rotating twin-screw extruder with L/D 40:1 and side-fed talc. Notched Izod impact at −30 °C per ASTM D256-23 typically increases from 2.5 kJ/m² to 8–12 kJ/m² when the dispersed POE domain size remains below 1.0 µm. Domain size is controlled by screw speed of 250–400 min⁻¹, melt temperature of 210–230 °C, and residence time distribution. Flexural modulus per ISO 178:2019 decreases from 1,500 MPa to 900–1,100 MPa at 20 wt% POE, so the quotation must state whether low-temperature toughness or stiffness governs the specification. The processing window narrows further when a 40 wt% talc masterbatch is used because excess talc raises melt temperature and degrades POE phase morphology.

Filler and Plasticizer Boundaries for Soft-Touch POE Compounds

Soft-touch formulations with Shore A 40–70 are produced by compounding POE with 20–60 phr calcium carbonate or 10–30 phr paraffinic oil. Oil extension above 40 phr risks plate-out on calender rolls and reduces tear strength below 20 N/mm per ASTM D624-00 die C. Batch-to-batch viscosity drift is observed on tangential internal mixers with ram pressure of 0.4–0.6 MPa when oil is injected before the POE reaches flux; a total mix cycle of 3–5 min is standard. Compression set per ASTM D395-18 Method B after 22 h at 70 °C rises from 25% to 45% as oil loading moves from 10 phr to 30 phr. For olefinic TPE compounds, the submitting party should specify whether the part is overmolded onto polypropylene with a mold surface temperature of 30–60 °C because POE grades with higher ethylene crystallinity provide lower shrinkage but also lower adhesion to PP.

Halogen-free flame-retardant jacket compounds based on POE are mixed on a counter-rotating twin-screw extruder with L/D 36:1 and a melt temperature of 160–190 °C. Addition of 40 wt% magnesium hydroxide raises melt pressure by 20–30% compared with unfilled POE and narrows the processing window to ±5 °C at the die. Tensile strength per ISO 37:2017 after hot-air aging 168 h at 136 °C should not fall below 10 MPa. Published data for treeing resistance in POE-based HFFR insulation is limited, so accelerated water immersion at 75 °C is recommended before grade substitution.

When Photovoltaic Encapsulant Film Demands Low Gel Content and High Volume Resistivity

Photovoltaic encapsulant film typically uses POE with 1-butene or 1-octene comonomer, density 0.862–0.880 g/cm³, and melt index 3–15 g/10 min. A gel count below 20 particles per 100 cm² at 0.1 mm film thickness is often specified because gel particles create lamination defects. Volume resistivity per ASTM D257-14 at 500 V DC should remain above 1.0 × 10¹⁵ Ω·cm after damp heat aging at 85 °C and 85% relative humidity for 1,000 h per IEC 61215-2:2021. The POE grade must also demonstrate adhesion to glass above 40 N/cm after lamination at 145–155 °C. These requirements exclude POE grades with high catalyst residues; ash content above 200 ppm correlates with lower shunt resistance in module strings. Quotation data should state gel count, volume resistivity, and silane coupling agent package, if any, because standard non-film POE grades cannot be substituted without qualification testing.

POE is used in crosslinked foam for midsoles when blended with EVA at 10–30 wt%. A twin-roll mill or internal mixer at 100–110 °C compounds the POE-EVA blend with dicumyl peroxide at 0.5–1.0 phr and azodicarbonamide blowing agent at 2–4 phr. Foam density after press curing at 160–170 °C for 6–10 min is 0.15–0.25 g/cm³. DIN 53516 abrasion volume loss below 200 mm³ is achievable when POE content is held below 20 wt%, but hardness per ASTM D2240 drops below Shore A 30 when POE exceeds 30 wt%. The quotation data set should include mold cycle time, part thickness, and required rebound resilience because POE improves flex crack resistance but lowers dimensional stability in thick sections.

Thermal Bonding Windows and Hot-Tack Plateaus for Coextruded Sealant Layers

For coextruded sealant films, the relevant POE parameter is not only MFR but also comonomer distribution and seal initiation temperature. A blown film line with die gap 1.8 mm and blow-up ratio 2.5:1 can process POE grades with melt index 3–8 g/10 min. Hot tack strength per ASTM F1921-18 Method B at 105 °C seal bar temperature typically reaches 2.5–4.0 N/25 mm for ethylene-octene POE with 25–35 wt% octene. Seal initiation temperature, defined as the point where heat seal strength reaches 4.4 N/15 mm per ASTM F88/F88M-21, is usually 85–95 °C. The quotation should state packaging line speed, seal dwell time, and coextruded layer ratio because thin POE sealant layers below 10 µm require a higher melt strength grade to prevent draw resonance.

A 5 ppm Metal-Catalyst Residue Boundary for Organoleptic Food-Contact Grades

Food-contact POE must comply with FDA 21 CFR 177.1520 and EU Regulation No 10/2011. Overall migration into 10% ethanol and 3% acetic acid simulants is generally below 10 mg/dm² when the POE has a total ash content below 300 ppm. Residual metals from catalyst systems, including titanium or zirconium, should be below 5 ppm to avoid organoleptic taint in low-density polyethylene seal layers. The quotation should state whether the final article is a repeated-use or single-use food-contact material and whether hot-fill conditions exceed 70 °C because fatty food simulants under EU Regulation 10/2011 require additional migration testing. A certificate of compliance with the EU food-contact positive list and FDA 21 CFR 177.1520(c) clauses is required for 24-hour quotation of food-grade POE.

What Must Be Submitted to Achieve a 24-Hour Quotation?

The following data fields allow a supplier to match a POE grade against production-scale extrusion, molding, and regulatory boundaries. Incomplete fields force a conservative grade selection that may not meet the required property window.