| HS Code | 258168 |
| Vinyl Acetate Content | 18 wt% |
| Melt Flow Rate 190 C 2 16 Kg | 2.0 g/10 min |
| Density | 0.940 g/cm³ |
| Melting Point Dsc | 84 °C |
| Crystallization Temperature | 52 °C |
| Vicat Softening Temperature | 53 °C |
| Tensile Strength At Break | 19 MPa |
| Elongation At Break | 700% |
| Flexural Modulus 1 Secant | 40 MPa |
| Shore A Hardness | 92 |
| Glass Transition Temperature | -32 °C |
| Product | ELEVATE EM518 Ethylene Vinyl Acetate Copolymer |
| Vinyl Acetate Content | 28 wt % |
| Melt Index | 450 g/10 min at 190°C, 2.16 kg |
| Density | 0.950 g/cm³ |
| Melting Point | 65 °C |
| Glass Transition Temperature | -40 °C |
| Vicat Softening Point | 45 °C |
| Brookfield Viscosity | 700 mPa·s at 150 °C |
| Tensile Strength | 5 MPa |
| Elongation At Break | 750 % |
| Shore A Hardness | 70 |
| Crystallization Peak Temperature | 50 °C |
| Crystallinity | 20 % |
As an accredited ELEVATE EM518 Ethylene Vinyl Acetate Copolymer factory, we enforce strict quality protocols—every batch undergoes rigorous testing to ensure consistent efficacy and safety standards.
| Packing | ELEVATE EM518 Ethylene Vinyl Acetate Copolymer is supplied as pellets in 25 kg bags, with clear labeling and lot traceability. |
| Container Loading (20′ FCL) | 20' FCL: 25kg bags of ELEVATE EM518 palletized, about 20 metric tons per container, secured for safe transport. |
| Shipping | ELEVATE EM518 Ethylene Vinyl Acetate Copolymer ships as solid pellets in moisture-protective bags, bulk bags, or rail hoppers. It is non-hazardous under normal transport conditions. Keep dry, avoid excessive heat and direct sunlight, and store in a well-ventilated area to maintain product integrity. |
| Storage | Store ELEVATE EM518 Ethylene Vinyl Acetate Copolymer in a cool, dry, well-ventilated area away from heat, open flames, and direct sunlight. Keep containers tightly sealed to prevent moisture absorption and contamination. Avoid static electricity buildup. Maintain moderate temperatures and low humidity. Use within recommended shelf life to ensure consistent processing and performance. |
| Shelf Life | Shelf life is typically 24 months when stored in original, unopened packaging in a cool, dry area. |
ELEVATE EM518 ethylene vinyl acetate copolymer, supplied with nominal vinyl acetate content 18 %, melt flow rate 0.5 g/10 min under ASTM D1238 at 190 °C/2.16 kg, and density 0.940 g/cm³ under ASTM D792, is used in low-durometer automotive sealing profiles and extruded technical trim where filler acceptance and die-swell control govern line yield. The copolymer is dry-blended with 0.5–1.0 phr of a hindered phenolic primary antioxidant and 0.2–0.5 phr of a phosphite melt stabilizer prior to metering into a single-screw extruder with grooved feed section, L/D ratio 24:1 to 30:1, and compression ratio 2.5:1 to 3.0:1. Barrel settings are profiled from 140 °C at the feed throat to 175 °C at the die head, with a 60/80/100 mesh screen pack installed upstream of the breaker plate to remove filler agglomerates. Calcium carbonate is loaded between 10 phr and 40 phr through a side feeder or as a pelletized EVA-based masterbatch; the resulting Shore A hardness measured to ASTM D2240 after 15 s dwell falls between 72 and 88, depending on filler morphology and coupling agent addition. Hollow sections are vacuum-calibrated to ISO 3302, class E2, while coextruded TPV skin layers are applied at the die head to improve abrasion resistance. On single-screw lines without a vent port, filler loadings above 45 phr and residual moisture above 0.03 % have been associated with melt fracture and surface porosity; pre-drying at 70 °C for 4 h is required after storage at relative humidity above 60 %. Terminal products include door-seal filler strands, low-pressure gaskets, and extruded trim for automotive interior and exterior weatherseal systems.
In halogen-free flame-retardant jacket formulations, EM518 is selected as the base resin for its balance of polar comonomer wetting and low-temperature flexibility. A representative starting formulation includes 35–45 wt% EM518, 55–65 wt% surface-treated magnesium hydroxide or a 2:1 blend of magnesium hydroxide and aluminium trihydrate, 0.8–1.2 phr vinyltrimethoxy silane coupling agent, 0.4–0.6 phr zinc stearate, 0.3–0.5 phr hindered phenolic antioxidant, and 10–20 wt% linear low-density polyethylene as an elongation modifier. Compounding is performed in a co-rotating twin-screw extruder with L/D 40:1, atmospheric and vacuum venting, and side feeding of the flame-retardant filler at barrel zone 6. Barrel temperatures are held at 130–160 °C to prevent premature water release from aluminium trihydrate, which begins near 180 °C, while die pressure is maintained below 18 MPa to control shear heating. The molten strand is pelletized through a 20–30 °C water bath and dried to a pellet moisture content below 0.05 % before cable extrusion. During jacketing, the compound is extruded over twisted conductors at 140–165 °C on a single-screw extruder with L/D 24:1 to 30:1 and a screw compression ratio of 2.0:1 to 2.5:1. Terminal products include control cable sheaths, underground data-cable jackets, and low-smoke building wire jacketing.
| Standard / Method | Test Condition | Acceptance Range |
|---|---|---|
| IEC 60754-1 | Pyrolysis gas pH and conductivity | pH ≥ 4.3; conductivity ≤ 10 µS/mm |
| IEC 60754-2 | Halogen acid gas evolution | Halogen acid ≤ 0.5 % |
| IEC 61034-2 | Smoke density in 3 m cube | Light transmittance ≥ 70 % |
| ISO 4589-2 | Oxygen index | OI ≥ 35 % |
| ASTM D638 | Tensile retention after aging | Retention ≥ 80 % after 168 h at 100 °C |
The halogen-free performance of the filled compound is verified against the standards in the matrix above. Residual stearic acid coatings on untreated magnesium hydroxide can reduce silane coupling efficiency and should be absent or neutralized before compounding. Published data for this specific filled configuration is limited; therefore, the silane level is adjusted by comparing unaged tensile strength with tensile retention after 7 days immersion in 80 °C water rather than by relying on neat resin values.
Because the 18 % vinyl acetate content lowers average crystallite thickness, crosslinked foam compounds based on EM518 respond to dicumyl peroxide curing and azodicarbonamide blowing-agent decomposition in compression and injection expansion processes. A controlled batch is mixed in an internal mixer with a fill factor of 0.75–0.80, using 3.0–4.5 phr azodicarbonamide, 0.6–0.9 phr dicumyl peroxide, 0.7–1.2 phr zinc stearate, and 5–15 phr of an ethylene-octene elastomer where lower skin hardness is required. Zinc stearate activates decomposition of azodicarbonamide at a lower temperature; without it, primary decomposition occurs near 200–210 °C. The mixed batch is sheeted on a two-roll mill at 90–100 °C and pelletized before injection moulding with a screw compression ratio of 2.0:1 to 2.5:1, barrel temperatures of 120–150 °C, and mould temperatures of 170–185 °C. Expansion reduces density from the nominal 0.940 g/cm³ to 0.08–0.15 g/cm³; Shore C hardness after 24 h conditioning is typically 25–40 under ASTM D2240. Crosslink density is monitored with a moving-die rheometer at 180 °C and 3° arc; a plateau in torque is used to confirm cure completion. Copper or copper-alloy tooling should be avoided because copper ions accelerate peroxide decomposition and can cause scorch. Terminal products include athletic shoe midsoles, orthopaedic sandals, anti-fatigue mats, and expanded padding for protective equipment.
In coextruded heat-seal layers for low-temperature packaging, EM518 is blended with 10–20 wt% LDPE or 5–10 wt% polyolefin plastomer to lower seal initiation temperature while reducing roll-blocking. The seal layer is processed on a three-layer cast film line with a 20–40 µm total thickness at melt temperatures of 170–190 °C; chill-roll temperature is set at 20–30 °C to control crystallinity and film optics. Heat-seal strength is measured to ASTM F88 after an impulse seal at 0.5 MPa pressure and 1 s dwell; the target peel strength varies by package design, but food contact compliance is verified under FDA 21 CFR 177.1520 and EU Regulation 10/2011. For medical pouch stock, ISO 10993-5 and ISO 10993-10 provide cytotoxicity and sensitization endpoints after gamma or ethylene oxide terminal sterilization. Slip and antiblock additives are limited to 0.05–0.10 wt% erucamide and 0.05–0.10 wt% synthetic silica to avoid migration exceeding packaging-food contact conditions. The seal layer is not recommended for hot-fill above 90 °C or retort processes above 121 °C, where polypropylene-based sealants provide better seal integrity under thermal load. Terminal products include lidding film, IV solution overwrap sealed at low temperature, and barrier pouch stock for low-acid dry foods.
For high-colour-load masterbatch production, EM518 is used as a carrier resin in concentrations of 30–40 wt%, with 40–50 wt% organic or inorganic pigment and 10–20 wt% polyethylene wax as wetting agent. Compounding is carried out in a co-rotating twin-screw extruder with L/D 40:1, high-shear mixing elements in barrels 4–8, and a flat temperature profile of 140–170 °C. Dispersion quality is assessed according to EN 13900-5 by measuring screen-pack pressure rise and by microscopic examination of pressed thin sections; a pressure rise of less than 0.15 MPa per 10 min on a 25 µm screen pack is a common production acceptance limit. The carrier is then pelletized and let down at 2–5 wt% in target polyolefin film or moulding compounds. Terminal products include LDPE agricultural film, EVA foam colouring, and flexible injection-moulded packaging closures. Moisture above 0.03 % in the pigment or carrier requires pre-drying at 70 °C for 3–4 h; otherwise hydrolysis of the vinyl acetate ester can generate acetic acid and corrode downstream equipment.
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ELEVATE EM518 is an ethylene vinyl acetate copolymer supplied in pellet form with a nominal vinyl acetate comonomer content of 18 wt% and a melt mass-flow rate of 0.5 g/10 min when measured at 190 °C under a 2.16 kg load in accordance with ASTM D1238-20. The resin has a typical density of 0.938 g/cm³ when tested by ASTM D1505-18 and a differential scanning calorimetry melting peak near 84 °C under ASTM D3418-21. The manufacturer’s release documentation should be consulted for lot-specific values because vinyl acetate content and melt flow rate are controlled within statistical process-control limits. The material is positioned for blown film sealant layers, extrusion coating, sheet, foam, and filled compounds requiring low melt flow and intermediate polarity. The product belongs to the ethylene-vinyl acetate copolymer class described in 21 CFR 177.1350; final food-contact compliance depends on layer construction, total migration, and end-use conditions. The neat resin is not intended as a finished food-contact article without converter qualification.
Specification conformance for ELEVATE EM518 is established through multi-lot data on comonomer content, melt flow, and density. The certificate of analysis reports lot-specific values; the table below lists nominal values from the manufacturer’s technical data sheet. Equivalence testing between lots or alternative suppliers follows ISO 1133-1:2022 for melt flow rate and ASTM D5594 for vinyl acetate content. Density is a secondary lot-consistency screen. The polar comonomer distribution in the final film is not controlled by the resin specification alone; film qualification requires heat-seal curves, haze, and blocking tests according to ASTM F88/F88M-23 and ASTM D1003-21.
| Property | Nominal value | Test method |
|---|---|---|
| Vinyl acetate comonomer content | 18 wt% | ASTM D5594 |
| Melt mass-flow rate | 0.5 g/10 min | ASTM D1238-20, 190 °C/2.16 kg |
| Density | 0.938 g/cm³ | ASTM D1505-18 |
| Melting peak temperature | 84 °C | ASTM D3418-21 |
On blown film lines using a 30:1 L/D barrier screw and a 150 mm die, melt temperatures for ELEVATE EM518 are maintained between 180 °C and 210 °C. The 0.5 g/10 min melt flow rate increases head pressure relative to a 2.0 g/10 min EVA at equal output; therefore the adapter temperature is not set above 220 °C. Thermal exposure above 230 °C initiates deacetylation of vinyl acetate repeat units, releasing acetic acid and causing yellowing, gel formation, and corrosion in carbon steel downstream components. Cast-film converters using 75 mm grooved-feed extruders control pressure by opening the die gap rather than increasing melt temperature. Moisture adsorption in EVA is limited, but condensation on cold pellet surfaces at relative humidity above 60% should be managed by drying at 60 °C for 2 h with a desiccant dryer delivering a dew point of -30 °C or lower before extrusion. The drying step prevents steam-induced bubble defects in the die-lip region. Start-up conditions are validated by melt-pressure and film-gauge measurement; published data for this specific configuration is limited.
Compounded formulations based on ELEVATE EM518 are produced in co-rotating twin-screw extruders with 40:1 L/D, side-fed filler, and vacuum venting at -0.08 MPa gauge. The 18 wt% vinyl acetate content promotes polar interaction with calcium carbonate, talc, magnesium hydroxide, and aluminium trihydrate. At filler addition levels above 40 phr, the compound melt flow rate falls below 0.1 g/10 min unless higher-melt-index co-resins or process oils are added. In halogen-free flame-retardant compounds containing 60 phr magnesium hydroxide, a 50 mm twin-screw extruder at 300 rpm can require specific mechanical energy above 0.20 kWh/kg. Vinylsilane or aminosilane coupling agents lower melt pressure and improve filler dispersion; untreated filler can raise pressure and reduce elongation at break under ISO 527-1:2019. ELEVATE EM518 blends with LDPE and LLDPE should be pre-compounded when melt flow rate differences exceed 2 g/10 min to avoid film-gauge variation and surface roughness. The resin’s low melt index contributes to high shear heating, so barrel cooling above 190 °C is more effective than screw-speed reduction in torque-limited operations.
Extrusion coating and lamination trials on a 90 mm single-screw line with a 1.2 mm die gap show that ELEVATE EM518 can be drawn down at coating weights from 15 g/m² to 40 g/m² when the melt temperature is kept below 220 °C. The high melt strength relative to high-melt-index EVA reduces neck-in and improves edge stability, but the low melt index increases pump pressure. Adhesion to aluminium foil and oriented polyester is evaluated by peel testing after lamination; the polar vinyl acetate groups raise bond strength relative to LDPE but lower hot-tack performance compared with metallocene plastomers. Published data for this specific configuration is limited; the converter should establish correlation between die gap, chill-roll temperature, and adhesion on the actual line.
Compared with EVA grades containing 9 wt% to 14 wt% vinyl acetate, ELEVATE EM518 has a lower crystalline melting peak, lower flexural stiffness, and lower seal initiation temperature, but higher low-temperature toughness. Commercial low-VA film grades typically exhibit seal initiation near 120 °C, while ELEVATE EM518 seals in the 85 °C to 95 °C range under ASTM F88/F88M-23. Compared with EVA containing 25 wt% to 28 wt% vinyl acetate, the 18 wt% grade has less surface tack, better blocking resistance, and lower acetic acid release potential per unit mass, but lower elastic recovery below -40 °C. Against metallocene polyethylene plastomers of similar density, ELEVATE EM518 provides higher polar adhesion to aluminium foil and polar seal substrates but higher density and narrower oxidative ageing stability. The resin should not be selected solely on vinyl acetate content; sealant layer performance is controlled by the entire time-temperature profile of the converting line and by the adjacent substrate surface energy.
On a three-layer blown film line with a 300 mm die and 2.5:1 blow-up ratio, substitution of a metallocene plastomer with ELEVATE EM518 changes cooling demand and seal performance. The EVA sealant layer at 8 µm to 20 µm thickness typically seals in the 85 °C to 95 °C range under ASTM F88/F88M-23. This range is acceptable for medium-speed horizontal form-fill-seal lines but is above the 80 °C seal initiation required for ultra-fast low-temperature packaging. The lower comonomer content relative to plastomers reduces blocking but requires higher jaw temperatures. Melt temperature should be kept 10 °C to 15 °C below a typical metallocene plastomer setting to avoid bubble instability. Higher melt strength improves bubble stability at high take-off ratios, but the 0.5 g/10 min melt flow rate increases extruder motor load. A converter qualifying this substitution should collect heat-seal curves from 70 °C to 120 °C and verify peel strength against the polyethylene substrate. Published data for this specific configuration is limited, and the first production trial should be limited to low-speed film structures.
Foam extrusion of ELEVATE EM518 is performed on tandem single-screw lines with chemical blowing agents. The 18 wt% vinyl acetate content lowers crystallinity and permits gas-expanded foam densities from 0.10 g/cm³ to 0.25 g/cm³ with azodicarbonamide. Residual blowing agent and surface roughness appear when melt temperature exceeds 220 °C at the die because gas-yield loss reduces nucleating pressure. Production lines using 65 mm primary and 90 mm cooling extruders control die melt temperature at 95 °C to 105 °C for crosslinked foam. Dicumyl peroxide loadings from 0.5 phr to 1.2 phr are applied; acetic acid generated during thermal history can consume peroxide and lower crosslink density. Gel content measured by ASTM D2765-16 is used to verify network formation. The low melt index promotes uniform cell nucleation relative to high-melt-index EVA, but limits output on small-diameter extruders below 60 mm. Published data for this specific configuration is limited.
Thermal deacetylation is the principal degradation pathway for ELEVATE EM518 above 230 °C. The reaction releases acetic acid and forms conjugated double bonds that shift colour and reduce seal performance. Equipment contact surfaces in the die and downstream piping should be made from 316 stainless steel or chrome-plated tool steel when melt temperature exceeds 210 °C. The maximum recommended residence time at 220 °C is 15 min; at 240 °C the permissible residence time drops below 5 min. Yellowness index measured by ASTM D6290-19 should be compared with the virgin pellet lot; an increase greater than 10 YI units indicates excessive thermal history. In-line Fourier-transform infrared spectroscopy can monitor the ester carbonyl band near 1740 cm⁻¹ against the methylene reference band near 1465 cm⁻¹; a decreasing ester-to-methylene ratio is an early indicator of deacetylation. Vinyl acetate content should be re-confirmed by ASTM D5594 after high-temperature processing if the film enters heat-seal qualification or food-contact migration testing.
